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This commit is contained in:
Artur K 2011-12-12 15:44:52 +01:00
parent 4c249fe5c4
commit 900438c453
53 changed files with 946 additions and 827 deletions
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19
CMakeLists.txt Executable file → Normal file
View File

@ -1,16 +1,24 @@
#CC = gcc -g -O -D__UNIX__
PROJECT(dcc_original)
cmake_minimum_required(VERSION 2.6)
SET(CMAKE_BUILD_TYPE Debug)
ADD_DEFINITIONS(-D_CRT_SECURE_NO_WARNINGS -D__UNIX__)
INCLUDE_DIRECTORIES(include ${Boost_INCLUDE_DIRS})
cmake_minimum_required(VERSION 2.8)
ADD_DEFINITIONS(-D_CRT_SECURE_NO_WARNINGS -D__UNIX__ -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS)
if(CMAKE_BUILD_TOOL MATCHES "(msdev|devenv|nmake)")
ADD_DEFINITIONS(-D_CRT_SECURE_NO_WARNINGS -D__UNIX__ -D_CRT_NONSTDC_NO_DEPRECATE)
add_definitions(/W4)
else()
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall --std=c++0x")
SET(CMAKE_CXX_FLAGS_DEBUG "-D_GLIBCXX_DEBUG ${CMAKE_CXX_FLAGS_DEBUG}" )
endif()
FIND_PACKAGE(LLVM)
FIND_PACKAGE(Boost)
llvm_map_components_to_libraries(REQ_LLVM_LIBRARIES jit native)
INCLUDE_DIRECTORIES(
include
${Boost_INCLUDE_DIRS}
${LLVM_INCLUDE_DIRS}
)
set(dcc_SOURCES
src/dcc.cpp
src/ast.cpp
@ -60,4 +68,5 @@ set(dcc_HEADERS
include/BasicBlock.h
)
ADD_EXECUTABLE(dcc_original ${dcc_SOURCES} ${dcc_HEADERS})
TARGET_LINK_LIBRARIES(dcc_original ${REQ_LLVM_LIBRARIES})

31
include/BasicBlock.h
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@ -2,12 +2,16 @@
#include <list>
#include <vector>
#include <string>
#include <llvm/ADT/ilist.h>
#include <llvm/ADT/ilist_node.h>
#include "types.h"
#include "graph.h"
/* Basic block (BB) node definition */
struct Function;
class CIcodeRec;
struct BB;
struct interval;
struct ICODE;
typedef union
{
dword ip; /* Out edge icode address */
@ -15,13 +19,13 @@ typedef union
interval *intPtr; /* Out edge ptr to next interval*/
} TYPEADR_TYPE;
struct BB
struct BB : public llvm::ilist_node<BB>
{
protected:
private:
BB(const BB&);
BB() : nodeType(0),traversed(0),start(0),length(0),
numHlIcodes(0),flg(0),
numInEdges(0),inEdges(0),
inEdges(0),
numOutEdges(0),edges(0),beenOnH(0),inEdgeCount(0),reachingInt(0),
inInterval(0),correspInt(0),liveUse(0),def(0),liveIn(0),liveOut(0),
dfsFirstNum(0),dfsLastNum(0),immedDom(0),ifFollow(0),loopType(0),latchNode(0),
@ -29,17 +33,25 @@ protected:
{
}
//friend class SymbolTableListTraits<BB, Function>;
//Int numInEdges; /* Number of in edges */
public:
Int begin();
Int end();
Int rbegin();
Int rend();
ICODE &front();
ICODE &back();
size_t size();
byte nodeType; /* Type of node */
Int traversed; /* Boolean: traversed yet? */
int traversed; /* Boolean: traversed yet? */
Int start; /* First instruction offset */
Int length; /* No. of instructions this BB */
Int numHlIcodes; /* No. of high-level icodes */
flags32 flg; /* BB flags */
/* In edges and out edges */
Int numInEdges; /* Number of in edges */
std::vector<BB *> inEdges; // does not own held pointers
Int numOutEdges; /* Number of out edges */
@ -85,4 +97,13 @@ public:
void mergeFallThrough(CIcodeRec &Icode);
void dfsNumbering(std::vector<BB *> &dfsLast, Int *first, Int *last);
void displayDfs();
void display();
/// getParent - Return the enclosing method, or null if none
///
const Function *getParent() const { return Parent; }
Function *getParent() { return Parent; }
void writeBB(ICODE *hli, Int lev, Function *pProc, Int *numLoc);
private:
Function *Parent;
};

60
include/Procedure.h
View File

@ -1,4 +1,7 @@
#pragma once
#include <llvm/ADT/ilist.h>
#include <llvm/ADT/ilist_node.h>
#include "BasicBlock.h"
#include "types.h"
#include "ast.h"
#include "icode.h"
@ -9,8 +12,44 @@
#include "StackFrame.h"
/* PROCEDURE NODE */
struct CALL_GRAPH;
struct Function
namespace llvm
{
// Traits for intrusive list of basic blocks...
template<>
struct ilist_traits<BB> : public ilist_default_traits<BB>
{
// createSentinel is used to get hold of the node that marks the end of the
// list... (same trick used here as in ilist_traits<Instruction>)
BB *createSentinel() const {
return static_cast<BB*>(&Sentinel);
}
static void destroySentinel(BB*) {}
BB *provideInitialHead() const { return createSentinel(); }
BB *ensureHead(BB*) const { return createSentinel(); }
static void noteHead(BB*, BB*) {}
//static ValueSymbolTable *getSymTab(Function *ItemParent);
private:
mutable ilist_half_node<BB> Sentinel;
};
}
struct FunctionType
{
bool m_vararg;
bool isVarArg() const {return m_vararg;}
};
struct Function : public llvm::ilist_node<Function>
{
typedef llvm::iplist<BB> BasicBlockListType;
// BasicBlock iterators...
typedef BasicBlockListType::iterator iterator;
typedef BasicBlockListType::const_iterator const_iterator;
private:
BasicBlockListType BasicBlocks; ///< The basic blocks
public:
dword procEntry; /* label number */
char name[SYMLEN]; /* Meaningful name for this proc */
STATE state; /* Entry state */
@ -36,15 +75,16 @@ struct Function
dword liveOut; /* Registers that may be used in successors */
boolT liveAnal; /* Procedure has been analysed already */
/* Double-linked list */
// Function *next;
// Function *prev;
public:
Function() : procEntry(0),depth(0),flg(0),cbParam(0),cfg(0),dfsLast(0),numBBs(0),
Function(void *ty=0) : procEntry(0),depth(0),flg(0),cbParam(0),cfg(0),dfsLast(0),numBBs(0),
hasCase(false),liveIn(0),liveOut(0),liveAnal(0)//,next(0),prev(0)
{
memset(name,0,SYMLEN);
}
public:
static Function *Create(void *ty=0,int Linkage=0,const std::string &nm="",void *module=0)
{
return new Function(ty);
}
void compoundCond();
void writeProcComments();
void lowLevelAnalysis();
@ -66,7 +106,13 @@ public:
void codeGen(std::ostream &fs);
void displayStats();
void mergeFallThrough(BB *pBB);
void structIfs();
void structLoops(derSeq *derivedG);
void buildCFG();
void controlFlowAnalysis();
void newRegArg(ICODE *picode, ICODE *ticode);
protected:
void structCases();
void findExps();
void genDU1();
void elimCondCodes();
@ -74,4 +120,6 @@ protected:
void findIdioms();
void propLong();
void genLiveKtes();
byte findDerivedSeq (derSeq *derivedGi);
bool nextOrderGraph(derSeq *derivedGi);
};

15
include/dcc.h
View File

@ -3,7 +3,7 @@
* (C) Cristina Cifuentes, Mike van Emmerik
****************************************************************************/
#pragma once
#include <llvm/ADT/ilist.h>
#include "types.h"
#include "ast.h"
#include "icode.h"
@ -13,8 +13,11 @@
#include "bundle.h"
#include "Procedure.h"
#include "BasicBlock.h"
typedef std::list<Function> lFunction;
typedef std::list<Function>::iterator ilFunction;
typedef llvm::iplist<Function> FunctionListType;
typedef FunctionListType lFunction;
typedef lFunction::iterator ilFunction;
/* SYMBOL TABLE */
struct SYM {
@ -50,7 +53,8 @@ public:
void insertArc(ilFunction newProc);
};
#define NUM_PROCS_DELTA 5 /* delta # procs a proc invokes */
extern std::list<Function> pProcList;
//extern std::list<Function> pProcList;
extern FunctionListType pProcList;
extern CALL_GRAPH * callGraph; /* Pointer to the head of the call graph */
extern bundle cCode; /* Output C procedure's declaration and code */
@ -179,7 +183,6 @@ boolT LibCheck(Function &p); /* chklib.c */
/* Exported functions from procs.c */
boolT insertCallGraph (CALL_GRAPH *, ilFunction, ilFunction);
void newRegArg (Function *, ICODE *, ICODE *);
boolT newStkArg (ICODE *, COND_EXPR *, llIcode, Function *);
void allocStkArgs (ICODE *, Int);
void placeStkArg (ICODE *, COND_EXPR *, Int);
@ -190,7 +193,6 @@ void removeRegFromLong (byte, LOCAL_ID *, COND_EXPR *);
std::string walkCondExpr (const COND_EXPR *exp, Function * pProc, Int *);
Int hlTypeSize (const COND_EXPR *, Function *);
hlType expType (const COND_EXPR *, Function *);
void copyDU (ICODE *, const ICODE *, operDu, operDu);
boolT insertSubTreeReg (COND_EXPR *, COND_EXPR **, byte, LOCAL_ID *);
boolT insertSubTreeLongReg (COND_EXPR *, COND_EXPR **, Int);
//COND_EXPR *concatExps (SEQ_COND_EXPR *, COND_EXPR *, condNodeType);
@ -202,7 +204,6 @@ Int numElemExpStk();
boolT emptyExpStk();
/* Exported functions from hlicode.c */
boolT removeDefRegi (byte, ICODE *, Int, LOCAL_ID *);
std::string writeCall (Function *, STKFRAME *, Function *, Int *);
char *write1HlIcode (HLTYPE, Function *, Int *);
char *writeJcond (HLTYPE, Function *, Int *);

3
include/graph.h
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@ -5,6 +5,7 @@
#pragma once
#include <list>
#include <vector>
struct Function;
/* Types of basic block nodes */
/* Real basic blocks: type defined according to their out-edges */
enum eBBKind
@ -88,7 +89,7 @@ struct derSeq_Entry
}
~derSeq_Entry();
public:
void findIntervals();
void findIntervals(Function *c);
};
class derSeq : public std::list<derSeq_Entry>
{

42
include/icode.h
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@ -6,7 +6,7 @@
#include <vector>
#include "Enums.h"
//enum condId;
struct LOCAL_ID;
/* LOW_LEVEL icode flags */
enum eLLFlags
{
@ -45,16 +45,19 @@ enum eLLFlags
/* Parser flags */
#define TO_REG 0x000100 /* rm is source */
#define S 0x000200 /* sign extend */
#define S_EXT 0x000200 /* sign extend */
#define OP386 0x000400 /* 386 op-code */
#define NSP 0x000800 /* NOT_HLL if SP is src or dst */
#define ICODEMASK 0xFF00FF /* Masks off parser flags */
/* LOW_LEVEL icode, DU flag bits */
#define Cf 1
#define Sf 2
#define Zf 4
#define Df 8
enum eDuFlags
{
Cf=1,
Sf=2,
Zf=4,
Df=8
};
/* Machine registers */
#define rAX 1 /* These are numbered relative to real 8086 */
@ -227,7 +230,7 @@ typedef enum {
HLI_RET, /* Return from procedure */
/* pseudo high-level icodes */
HLI_POP, /* Pop expression */
HLI_PUSH, /* Push expression */
HLI_PUSH /* Push expression */
} hlIcode;
/* Def/use of flags - low 4 bits represent flags */
@ -250,13 +253,6 @@ struct DU_ICODE
#define MAX_REGS_DEF 2 /* 2 regs def'd for long-reg vars */
#define MAX_USES 5
struct DU1
{
Int numRegsDef; /* # registers defined by this inst */
byte regi[MAX_REGS_DEF]; /* registers defined by this inst */
Int idx[MAX_REGS_DEF][MAX_USES]; /* inst that uses this def */
};
/* LOW_LEVEL icode operand record */
struct ICODEMEM
@ -312,6 +308,12 @@ typedef struct
/* Icode definition: LOW_LEVEL and HIGH_LEVEL */
struct ICODE
{
struct DU1
{
Int numRegsDef; /* # registers defined by this inst */
byte regi[MAX_REGS_DEF]; /* registers defined by this inst */
Int idx[MAX_REGS_DEF][MAX_USES]; /* inst that uses this def */
};
icodeType type; /* Icode type */
boolT invalid; /* Has no HIGH_LEVEL equivalent */
BB *inBB; /* BB to which this icode belongs */
@ -323,6 +325,13 @@ struct ICODE
HLTYPE hl; /* For HIGH_LEVEL icodes */
};
IC ic;/* intermediate code */
int loc_ip; // used by CICodeRec to number ICODEs
void SetLlFlag(dword flag) {ic.ll.flg |= flag;}
dword GetLlFlag() {return ic.ll.flg;}
bool isLlFlag(dword flg) {return (ic.ll.flg&flg)==flg;}
llIcode GetLlOpcode() const { return ic.ll.opcode; }
void writeIntComment(char *s);
void setRegDU(byte regi, operDu du_in);
void invalidate();
@ -333,7 +342,10 @@ struct ICODE
void setAsgn(COND_EXPR *lhs, COND_EXPR *rhs); // set this icode to be an assign
void setUnary(hlIcode op, COND_EXPR *exp);
void setJCond(COND_EXPR *cexp);
int loc_ip; // used by CICodeRec to number ICODEs
void emitGotoLabel(Int indLevel);
void copyDU(const ICODE &duIcode, operDu _du, operDu duDu);
public:
boolT removeDefRegi(byte regi, Int thisDefIdx, LOCAL_ID *locId);
};
// This is the icode array object.

5
include/locident.h
View File

@ -8,6 +8,7 @@
#pragma once
#include <vector>
#include <algorithm>
#include "icode.h"
/* Type definition */
struct IDX_ARRAY : public std::vector<int>
{
@ -111,7 +112,9 @@ struct LOCAL_ID
std::vector<ID> id_arr;
public:
LOCAL_ID()
{}
{
id_arr.reserve(256);
}
Int newByteWordReg(hlType t, byte regi);
Int newByteWordStk(hlType t, Int off, byte regOff);
Int newIntIdx(int16 seg, int16 off, byte regi, Int ix, hlType t);

2
include/types.h
View File

@ -47,7 +47,7 @@ typedef unsigned char boolT; /* 8 bits */
/* Macro reads a LH word from the image regardless of host convention */
/* Returns a signed quantity, e.g. C000 is read into an Int as FFFFC000 */
#define LHS(p) (((byte *)(p))[0] + (((char *)(p))[1] << 8))
#define LH_SIGNED(p) (((byte *)(p))[0] + (((char *)(p))[1] << 8))
/* Macro tests bit b for type t in prog.map */
#define BITMAP(b, t) (prog.map[(b) >> 2] & ((t) << (((b) & 3) << 1)))

337
src/BasicBlock.cpp
View File

@ -1,9 +1,16 @@
#include <cassert>
#include <string>
#include "BasicBlock.h"
#include "Procedure.h"
#include "dcc.h"
BB *BB::Create(void *ctx, const std::string &s, Function *parent, BB *insertBefore)
using namespace std;
extern char *indent (Int indLevel);
BB *BB::Create(void *ctx, const string &s, Function *parent, BB *insertBefore)
{
return new BB;
BB *pnewBB = new BB;
pnewBB->Parent = parent;
return pnewBB;
}
BB *BB::Create(Int start, Int ip, byte nodeType, Int numOutEdges, Function *parent)
@ -31,8 +38,334 @@ BB *BB::Create(Int start, Int ip, byte nodeType, Int numOutEdges, Function *pare
parent->Icode.SetInBB(start, ip, pnewBB);
parent->heldBBs.push_back(pnewBB);
parent->cfg.push_back(pnewBB);
pnewBB->Parent = parent;
}
if (start != -1) /* Only for code BB's */
stats.numBBbef++;
return pnewBB;
}
static const char *const s_nodeType[] = {"branch", "if", "case", "fall", "return", "call",
"loop", "repeat", "interval", "cycleHead",
"caseHead", "terminate",
"nowhere" };
static const char *const s_loopType[] = {"noLoop", "while", "repeat", "loop", "for"};
void BB::display()
{
printf("\nnode type = %s, ", s_nodeType[nodeType]);
printf("start = %ld, length = %ld, #out edges = %ld\n",
start, length, numOutEdges);
for (int i = 0; i < numOutEdges; i++)
printf(" outEdge[%2d] = %ld\n",i, edges[i].BBptr->start);
}
/*****************************************************************************
* displayDfs - Displays the CFG using a depth first traversal
****************************************************************************/
void BB::displayDfs()
{
Int i;
assert(this);
traversed = DFS_DISP;
printf("node type = %s, ", s_nodeType[nodeType]);
printf("start = %ld, length = %ld, #in-edges = %ld, #out-edges = %ld\n",
start, length, inEdges.size(), numOutEdges);
printf("dfsFirst = %ld, dfsLast = %ld, immed dom = %ld\n",
dfsFirstNum, dfsLastNum,
immedDom == MAX ? -1 : immedDom);
printf("loopType = %s, loopHead = %ld, latchNode = %ld, follow = %ld\n",
s_loopType[loopType],
loopHead == MAX ? -1 : loopHead,
latchNode == MAX ? -1 : latchNode,
loopFollow == MAX ? -1 : loopFollow);
printf ("ifFollow = %ld, caseHead = %ld, caseTail = %ld\n",
ifFollow == MAX ? -1 : ifFollow,
caseHead == MAX ? -1 : caseHead,
caseTail == MAX ? -1 : caseTail);
if (nodeType == INTERVAL_NODE)
printf("corresponding interval = %ld\n", correspInt->numInt);
else
for (i = 0; i < inEdges.size(); i++)
printf (" inEdge[%ld] = %ld\n", i, inEdges[i]->begin());
/* Display out edges information */
for (i = 0; i < numOutEdges; i++)
if (nodeType == INTERVAL_NODE)
printf(" outEdge[%ld] = %ld\n", i,
edges[i].BBptr->correspInt->numInt);
else
printf(" outEdge[%d] = %ld\n", i, edges[i].BBptr->begin());
printf("----\n");
/* Recursive call on successors of current node */
for (i = 0; i < numOutEdges; i++)
if (edges[i].BBptr->traversed != DFS_DISP)
edges[i].BBptr->displayDfs();
}
/* Recursive procedure that writes the code for the given procedure, pointed
* to by pBB.
* Parameters: pBB: pointer to the cfg.
* Icode: pointer to the Icode array for the cfg graph of the
* current procedure.
* indLevel: indentation level - used for formatting.
* numLoc: last # assigned to local variables */
void BB::writeCode (Int indLevel, Function * pProc , Int *numLoc,Int latchNode, Int _ifFollow)
{
Int follow, /* ifFollow */
_loopType, /* Type of loop, if any */
_nodeType; /* Type of node */
BB * succ, *latch; /* Successor and latching node */
ICODE * picode; /* Pointer to HLI_JCOND instruction */
char *l; /* Pointer to HLI_JCOND expression */
boolT emptyThen, /* THEN clause is empty */
repCond; /* Repeat condition for while() */
/* Check if this basic block should be analysed */
if ((_ifFollow != UN_INIT) && (this == pProc->dfsLast[_ifFollow]))
return;
if (traversed == DFS_ALPHA)
return;
traversed = DFS_ALPHA;
/* Check for start of loop */
repCond = FALSE;
latch = NULL;
_loopType = loopType;
if (_loopType)
{
latch = pProc->dfsLast[this->latchNode];
switch (_loopType)
{
case WHILE_TYPE:
picode = &this->back();
/* Check for error in while condition */
if (picode->ic.hl.opcode != HLI_JCOND)
reportError (WHILE_FAIL);
/* Check if condition is more than 1 HL instruction */
if (numHlIcodes > 1)
{
/* Write the code for this basic block */
writeBB(pProc->Icode.GetFirstIcode(), indLevel, pProc, numLoc);
repCond = TRUE;
}
/* Condition needs to be inverted if the loop body is along
* the THEN path of the header node */
if (edges[ELSE].BBptr->dfsLastNum == loopFollow)
inverseCondOp (&picode->ic.hl.oper.exp);
{
string e=walkCondExpr (picode->ic.hl.oper.exp, pProc, numLoc);
cCode.appendCode( "\n%swhile (%s) {\n", indent(indLevel),e.c_str());
}
picode->invalidate();
break;
case REPEAT_TYPE:
cCode.appendCode( "\n%sdo {\n", indent(indLevel));
picode = &latch->back();
picode->invalidate();
break;
case ENDLESS_TYPE:
cCode.appendCode( "\n%sfor (;;) {\n", indent(indLevel));
}
stats.numHLIcode += 1;
indLevel++;
}
/* Write the code for this basic block */
if (repCond == FALSE)
writeBB (pProc->Icode.GetFirstIcode(), indLevel, pProc, numLoc);
/* Check for end of path */
_nodeType = nodeType;
if (_nodeType == RETURN_NODE || _nodeType == TERMINATE_NODE ||
_nodeType == NOWHERE_NODE || (dfsLastNum == latchNode))
return;
/* Check type of loop/node and process code */
if (_loopType) /* there is a loop */
{
assert(latch);
if (this != latch) /* loop is over several bbs */
{
if (_loopType == WHILE_TYPE)
{
succ = edges[THEN].BBptr;
if (succ->dfsLastNum == loopFollow)
succ = edges[ELSE].BBptr;
}
else
succ = edges[0].BBptr;
if (succ->traversed != DFS_ALPHA)
succ->writeCode (indLevel, pProc, numLoc, latch->dfsLastNum,_ifFollow);
else /* has been traversed so we need a goto */
succ->front().emitGotoLabel (indLevel);
}
/* Loop epilogue: generate the loop trailer */
indLevel--;
if (_loopType == WHILE_TYPE)
{
/* Check if there is need to repeat other statements involved
* in while condition, then, emit the loop trailer */
if (repCond)
writeBB (pProc->Icode.GetFirstIcode(), indLevel+1, pProc, numLoc);
cCode.appendCode( "%s} /* end of while */\n",indent(indLevel));
}
else if (_loopType == ENDLESS_TYPE)
cCode.appendCode( "%s} /* end of loop */\n",indent(indLevel));
else if (_loopType == REPEAT_TYPE)
{
if (picode->ic.hl.opcode != HLI_JCOND)
reportError (REPEAT_FAIL);
{
string e=walkCondExpr (picode->ic.hl.oper.exp, pProc, numLoc);
cCode.appendCode( "%s} while (%s);\n", indent(indLevel),e.c_str());
}
}
/* Recurse on the loop follow */
if (loopFollow != MAX)
{
succ = pProc->dfsLast[loopFollow];
if (succ->traversed != DFS_ALPHA)
succ->writeCode (indLevel, pProc, numLoc, latchNode, _ifFollow);
else /* has been traversed so we need a goto */
succ->front().emitGotoLabel (indLevel);
}
}
else /* no loop, process nodeType of the graph */
{
if (_nodeType == TWO_BRANCH) /* if-then[-else] */
{
stats.numHLIcode++;
indLevel++;
emptyThen = FALSE;
if (ifFollow != MAX) /* there is a follow */
{
/* process the THEN part */
follow = ifFollow;
succ = edges[THEN].BBptr;
if (succ->traversed != DFS_ALPHA) /* not visited */
{
if (succ->dfsLastNum != follow) /* THEN part */
{
l = writeJcond ( back().ic.hl, pProc, numLoc);
cCode.appendCode( "\n%s%s", indent(indLevel-1), l);
succ->writeCode (indLevel, pProc, numLoc, latchNode,follow);
}
else /* empty THEN part => negate ELSE part */
{
l = writeJcondInv ( back().ic.hl, pProc, numLoc);
cCode.appendCode( "\n%s%s", indent(indLevel-1), l);
edges[ELSE].BBptr->writeCode (indLevel, pProc, numLoc, latchNode, follow);
emptyThen = TRUE;
}
}
else /* already visited => emit label */
succ->front().emitGotoLabel(indLevel);
/* process the ELSE part */
succ = edges[ELSE].BBptr;
if (succ->traversed != DFS_ALPHA) /* not visited */
{
if (succ->dfsLastNum != follow) /* ELSE part */
{
cCode.appendCode( "%s}\n%selse {\n",
indent(indLevel-1), indent(indLevel - 1));
succ->writeCode (indLevel, pProc, numLoc, latchNode, follow);
}
/* else (empty ELSE part) */
}
else if (! emptyThen) /* already visited => emit label */
{
cCode.appendCode( "%s}\n%selse {\n",
indent(indLevel-1), indent(indLevel - 1));
succ->front().emitGotoLabel (indLevel);
}
cCode.appendCode( "%s}\n", indent(--indLevel));
/* Continue with the follow */
succ = pProc->dfsLast[follow];
if (succ->traversed != DFS_ALPHA)
succ->writeCode (indLevel, pProc, numLoc, latchNode,_ifFollow);
}
else /* no follow => if..then..else */
{
l = writeJcond (
back().ic.hl, pProc, numLoc);
cCode.appendCode( "%s%s", indent(indLevel-1), l);
edges[THEN].BBptr->writeCode (indLevel, pProc, numLoc, latchNode, _ifFollow);
cCode.appendCode( "%s}\n%selse {\n", indent(indLevel-1), indent(indLevel - 1));
edges[ELSE].BBptr->writeCode (indLevel, pProc, numLoc, latchNode, _ifFollow);
cCode.appendCode( "%s}\n", indent(--indLevel));
}
}
else /* fall, call, 1w */
{
succ = edges[0].BBptr; /* fall-through edge */
if (succ->traversed != DFS_ALPHA)
succ->writeCode (indLevel, pProc,numLoc, latchNode,_ifFollow);
}
}
}
/* Writes the code for the current basic block.
* Args: pBB: pointer to the current basic block.
* Icode: pointer to the array of icodes for current procedure.
* lev: indentation level - used for formatting. */
void BB::writeBB(ICODE * hli, Int lev, Function * pProc, Int *numLoc)
{
Int i, last;
char *line; /* Pointer to the HIGH-LEVEL line */
/* Save the index into the code table in case there is a later goto
* into this instruction (first instruction of the BB) */
hli[start].codeIdx = nextBundleIdx (&cCode.code);
/* Generate code for each hlicode that is not a HLI_JCOND */
for (i = start, last = i + length; i < last; i++)
if ((hli[i].type == HIGH_LEVEL) && (hli[i].invalid == FALSE))
{
line = write1HlIcode (hli[i].ic.hl, pProc, numLoc);
if (line[0] != '\0')
{
cCode.appendCode( "%s%s", indent(lev), line);
stats.numHLIcode++;
}
if (option.verbose)
hli[i].writeDU(i);
}
}
int BB::begin()
{
return start;
}
int BB::rbegin()
{
return start+length-1;
}
int BB::end()
{
return start+length;
}
ICODE &BB::back()
{
return Parent->Icode[rbegin()];
}
ICODE &BB::front()
{
return Parent->Icode[start];
}

6
src/Procedure.cpp Normal file
View File

@ -0,0 +1,6 @@
#include "Procedure.h"
FunctionType *Function::getFunctionType() const
{
return &m_type;
}

17
src/ast.cpp
View File

@ -72,30 +72,31 @@ void ICODE::setRegDU (byte regi, operDu du_in)
/* Copies the def, use, or def and use fields of duIcode into pIcode */
void copyDU (ICODE *pIcode, const ICODE *duIcode, operDu du, operDu duDu)
void ICODE::copyDU(const ICODE &duIcode, operDu _du, operDu duDu)
{
// printf("%s %d,%d from %d to %d\n",__FUNCTION__,int(du),int(duDu),duIcode->ic.ll.opcode,pIcode->ic.ll.opcode);
switch (du) {
switch (_du)
{
case eDEF:
if (duDu == eDEF)
pIcode->du.def=duIcode->du.def;
du.def=duIcode.du.def;
else
pIcode->du.def=duIcode->du.use;
du.def=duIcode.du.use;
break;
case eUSE:
if (duDu == eDEF)
pIcode->du.use=duIcode->du.def;
du.use=duIcode.du.def;
else
pIcode->du.use =duIcode->du.use;
du.use =duIcode.du.use;
break;
case USE_DEF:
pIcode->du = duIcode->du;
du = duIcode.du;
break;
case NONE:
assert(false);
break;
}
printf("%s end: %x,%x\n",__FUNCTION__,pIcode->du.def,pIcode->du.use);
printf("%s end: %x,%x\n",__FUNCTION__,du.def,du.use);
}

287
src/backend.cpp
View File

@ -22,18 +22,16 @@ static char indentBuf[indSize] =
/* Indentation according to the depth of the statement */
static char *indent (Int indLevel)
char *indent (Int indLevel)
{
return (&indentBuf[indSize-(indLevel*4)-1]);
}
static Int getNextLabel()
/* Returns a unique index to the next label */
{ static Int labelIdx = 1; /* index of the next label */
Int getNextLabel()
{
static Int labelIdx = 1; /* index of the next label */
return (labelIdx++);
}
@ -206,36 +204,14 @@ static void writeBitVector (dword regi)
}
/* Checks the given icode to determine whether it has a label associated
* to it. If so, a goto is emitted to this label; otherwise, a new label
* is created and a goto is also emitted.
* Note: this procedure is to be used when the label is to be backpatched
* onto code in cCode.code */
static void emitGotoLabel (ICODE * pt, Int indLevel)
{
if (! (pt->ic.ll.flg & HLL_LABEL)) /* node hasn't got a lab */
{
/* Generate new label */
pt->ic.ll.hllLabNum = getNextLabel();
pt->ic.ll.flg |= HLL_LABEL;
/* Node has been traversed already, so backpatch this label into
* the code */
addLabelBundle (cCode.code, pt->codeIdx, pt->ic.ll.hllLabNum);
}
cCode.appendCode( "%sgoto L%ld;\n", indent(indLevel),
pt->ic.ll.hllLabNum);
stats.numHLIcode++;
}
// Note: Not currently called!
static void emitFwdGotoLabel (ICODE * pt, Int indLevel)
/* Checks the given icode to determine whether it has a label associated
* to it. If so, a goto is emitted to this label; otherwise, a new label
* is created and a goto is also emitted.
* Note: this procedure is to be used when the label is to be forward on
* the code; that is, the target code has not been traversed yet. */
static void emitFwdGotoLabel (ICODE * pt, Int indLevel)
{
if (! (pt->ic.ll.flg & HLL_LABEL)) /* node hasn't got a lab */
{
@ -248,254 +224,6 @@ static void emitFwdGotoLabel (ICODE * pt, Int indLevel)
}
/* Writes the code for the current basic block.
* Args: pBB: pointer to the current basic block.
* Icode: pointer to the array of icodes for current procedure.
* lev: indentation level - used for formatting. */
static void writeBB (const BB * const pBB, ICODE * hli, Int lev, Function * pProc, Int *numLoc)
{ Int i, last;
char *line; /* Pointer to the HIGH-LEVEL line */
/* Save the index into the code table in case there is a later goto
* into this instruction (first instruction of the BB) */
hli[pBB->start].codeIdx = nextBundleIdx (&cCode.code);
/* Generate code for each hlicode that is not a HLI_JCOND */
for (i = pBB->start, last = i + pBB->length; i < last; i++)
if ((hli[i].type == HIGH_LEVEL) && (hli[i].invalid == FALSE))
{
line = write1HlIcode (hli[i].ic.hl, pProc, numLoc);
if (line[0] != '\0')
{
cCode.appendCode( "%s%s", indent(lev), line);
stats.numHLIcode++;
}
if (option.verbose)
hli[i].writeDU(i);
}
//if (hli[i].invalid)
//printf("Invalid icode: %d!\n", hli[i].invalid);
}
/* Recursive procedure that writes the code for the given procedure, pointed
* to by pBB.
* Parameters: pBB: pointer to the cfg.
* Icode: pointer to the Icode array for the cfg graph of the
* current procedure.
* indLevel: indentation level - used for formatting.
* numLoc: last # assigned to local variables */
void BB::writeCode (Int indLevel, Function * pProc , Int *numLoc,Int latchNode, Int _ifFollow)
{
Int follow, /* ifFollow */
_loopType, /* Type of loop, if any */
_nodeType; /* Type of node */
BB * succ, *latch; /* Successor and latching node */
ICODE * picode; /* Pointer to HLI_JCOND instruction */
char *l; /* Pointer to HLI_JCOND expression */
boolT emptyThen, /* THEN clause is empty */
repCond; /* Repeat condition for while() */
/* Check if this basic block should be analysed */
if ((_ifFollow != UN_INIT) && (this == pProc->dfsLast[_ifFollow]))
return;
if (traversed == DFS_ALPHA)
return;
traversed = DFS_ALPHA;
/* Check for start of loop */
repCond = FALSE;
latch = NULL;
_loopType = loopType;
if (_loopType)
{
latch = pProc->dfsLast[this->latchNode];
switch (_loopType)
{
case WHILE_TYPE:
picode = pProc->Icode.GetIcode(start + length - 1);
/* Check for error in while condition */
if (picode->ic.hl.opcode != HLI_JCOND)
reportError (WHILE_FAIL);
/* Check if condition is more than 1 HL instruction */
if (numHlIcodes > 1)
{
/* Write the code for this basic block */
writeBB(this, pProc->Icode.GetFirstIcode(), indLevel, pProc, numLoc);
repCond = TRUE;
}
/* Condition needs to be inverted if the loop body is along
* the THEN path of the header node */
if (edges[ELSE].BBptr->dfsLastNum == loopFollow)
inverseCondOp (&picode->ic.hl.oper.exp);
{
std::string e=walkCondExpr (picode->ic.hl.oper.exp, pProc, numLoc);
cCode.appendCode( "\n%swhile (%s) {\n", indent(indLevel),e.c_str());
}
picode->invalidate();
break;
case REPEAT_TYPE:
cCode.appendCode( "\n%sdo {\n", indent(indLevel));
picode = pProc->Icode.GetIcode(latch->start+latch->length-1);
picode->invalidate();
break;
case ENDLESS_TYPE:
cCode.appendCode( "\n%sfor (;;) {\n", indent(indLevel));
}
stats.numHLIcode += 1;
indLevel++;
}
/* Write the code for this basic block */
if (repCond == FALSE)
writeBB (this, pProc->Icode.GetFirstIcode(), indLevel, pProc, numLoc);
/* Check for end of path */
_nodeType = nodeType;
if (_nodeType == RETURN_NODE || _nodeType == TERMINATE_NODE ||
_nodeType == NOWHERE_NODE || (dfsLastNum == latchNode))
return;
/* Check type of loop/node and process code */
if (_loopType) /* there is a loop */
{
assert(latch);
if (this != latch) /* loop is over several bbs */
{
if (_loopType == WHILE_TYPE)
{
succ = edges[THEN].BBptr;
if (succ->dfsLastNum == loopFollow)
succ = edges[ELSE].BBptr;
}
else
succ = edges[0].BBptr;
if (succ->traversed != DFS_ALPHA)
succ->writeCode (indLevel, pProc, numLoc, latch->dfsLastNum,_ifFollow);
else /* has been traversed so we need a goto */
emitGotoLabel (pProc->Icode.GetIcode(succ->start), indLevel);
}
/* Loop epilogue: generate the loop trailer */
indLevel--;
if (_loopType == WHILE_TYPE)
{
/* Check if there is need to repeat other statements involved
* in while condition, then, emit the loop trailer */
if (repCond)
writeBB (this, pProc->Icode.GetFirstIcode(), indLevel+1, pProc, numLoc);
cCode.appendCode( "%s} /* end of while */\n",indent(indLevel));
}
else if (_loopType == ENDLESS_TYPE)
cCode.appendCode( "%s} /* end of loop */\n",indent(indLevel));
else if (_loopType == REPEAT_TYPE)
{
if (picode->ic.hl.opcode != HLI_JCOND)
reportError (REPEAT_FAIL);
{
string e=walkCondExpr (picode->ic.hl.oper.exp, pProc, numLoc);
cCode.appendCode( "%s} while (%s);\n", indent(indLevel),e.c_str());
}
}
/* Recurse on the loop follow */
if (loopFollow != MAX)
{
succ = pProc->dfsLast[loopFollow];
if (succ->traversed != DFS_ALPHA)
succ->writeCode (indLevel, pProc, numLoc, latchNode, _ifFollow);
else /* has been traversed so we need a goto */
emitGotoLabel (pProc->Icode.GetIcode(succ->start), indLevel);
}
}
else /* no loop, process nodeType of the graph */
{
if (_nodeType == TWO_BRANCH) /* if-then[-else] */
{
stats.numHLIcode++;
indLevel++;
emptyThen = FALSE;
if (ifFollow != MAX) /* there is a follow */
{
/* process the THEN part */
follow = ifFollow;
succ = edges[THEN].BBptr;
if (succ->traversed != DFS_ALPHA) /* not visited */
{
if (succ->dfsLastNum != follow) /* THEN part */
{
l = writeJcond ( pProc->Icode.GetIcode(start + length -1)->ic.hl,
pProc, numLoc);
cCode.appendCode( "\n%s%s", indent(indLevel-1), l);
succ->writeCode (indLevel, pProc, numLoc, latchNode,follow);
}
else /* empty THEN part => negate ELSE part */
{
l = writeJcondInv ( pProc->Icode.GetIcode(start + length -1)->ic.hl,
pProc, numLoc);
cCode.appendCode( "\n%s%s", indent(indLevel-1), l);
edges[ELSE].BBptr->writeCode (indLevel, pProc, numLoc, latchNode, follow);
emptyThen = TRUE;
}
}
else /* already visited => emit label */
emitGotoLabel (pProc->Icode.GetIcode(succ->start), indLevel);
/* process the ELSE part */
succ = edges[ELSE].BBptr;
if (succ->traversed != DFS_ALPHA) /* not visited */
{
if (succ->dfsLastNum != follow) /* ELSE part */
{
cCode.appendCode( "%s}\n%selse {\n",
indent(indLevel-1), indent(indLevel - 1));
succ->writeCode (indLevel, pProc, numLoc, latchNode, follow);
}
/* else (empty ELSE part) */
}
else if (! emptyThen) /* already visited => emit label */
{
cCode.appendCode( "%s}\n%selse {\n",
indent(indLevel-1), indent(indLevel - 1));
emitGotoLabel (pProc->Icode.GetIcode(succ->start), indLevel);
}
cCode.appendCode( "%s}\n", indent(--indLevel));
/* Continue with the follow */
succ = pProc->dfsLast[follow];
if (succ->traversed != DFS_ALPHA)
succ->writeCode (indLevel, pProc, numLoc, latchNode,_ifFollow);
}
else /* no follow => if..then..else */
{
l = writeJcond (
pProc->Icode.GetIcode(start + length -1)->ic.hl, pProc, numLoc);
cCode.appendCode( "%s%s", indent(indLevel-1), l);
edges[THEN].BBptr->writeCode (indLevel, pProc, numLoc, latchNode, _ifFollow);
cCode.appendCode( "%s}\n%selse {\n", indent(indLevel-1), indent(indLevel - 1));
edges[ELSE].BBptr->writeCode (indLevel, pProc, numLoc, latchNode, _ifFollow);
cCode.appendCode( "%s}\n", indent(--indLevel));
}
}
else /* fall, call, 1w */
{
succ = edges[0].BBptr; /* fall-through edge */
if (succ->traversed != DFS_ALPHA)
succ->writeCode (indLevel, pProc,numLoc, latchNode,_ifFollow);
}
}
}
/* Writes the procedure's declaration (including arguments), local variables,
* and invokes the procedure that writes the code of the given record *hli */
void Function::codeGen (std::ostream &fs)
@ -522,7 +250,7 @@ void Function::codeGen (std::ostream &fs)
{
sprintf (arg,"%s %s",hlTypes[args.sym[i].type], args.sym[i].name);
strcat (buf, arg);
if (i < (args.numArgs - 1))
if (i < (args.sym.size() - 1))
strcat (buf, ", ");
}
}
@ -581,8 +309,7 @@ void Function::codeGen (std::ostream &fs)
pBB = dfsLast[i];
if (pBB->flg & INVALID_BB) continue; /* skip invalid BBs */
printf ("BB %d\n", i);
printf (" Start = %d, end = %d\n", pBB->start, pBB->start +
pBB->length - 1);
printf (" Start = %d, end = %d\n", pBB->begin(), pBB->end());
printf (" LiveUse = ");
writeBitVector (pBB->liveUse);
printf ("\n Def = ");

9
src/chklib.cpp
View File

@ -505,7 +505,8 @@ boolT LibCheck(Function & pProc)
/*** other types are not considered yet ***/
}
}
if (pFunc[i].bVararg) pProc.flg |= PROC_VARARG;
if (pFunc[i].bVararg)
pProc.flg |= PROC_VARARG;
}
}
else if (i == NIL)
@ -707,7 +708,7 @@ void STATE::checkStartup()
else if (locatePattern(prog.Image, startOff, startOff+0x180, pattMainCompact,
sizeof(pattMainCompact), &i))
{
rel = LHS(&prog.Image[i+OFFMAINCOMPACT]);/* This is the rel addr of main */
rel = LH_SIGNED(&prog.Image[i+OFFMAINCOMPACT]);/* This is the rel addr of main */
prog.offMain = i+OFFMAINCOMPACT+2+rel; /* Save absolute image offset */
prog.segMain = prog.initCS;
chModel = 'c'; /* Compact model */
@ -724,14 +725,14 @@ void STATE::checkStartup()
else if (locatePattern(prog.Image, startOff, startOff+0x180, pattMainSmall,
sizeof(pattMainSmall), &i))
{
rel = LHS(&prog.Image[i+OFFMAINSMALL]); /* This is rel addr of main */
rel = LH_SIGNED(&prog.Image[i+OFFMAINSMALL]); /* This is rel addr of main */
prog.offMain = i+OFFMAINSMALL+2+rel; /* Save absolute image offset */
prog.segMain = prog.initCS;
chModel = 's'; /* Small model */
}
else if (memcmp(&prog.Image[startOff], pattTPasStart, sizeof(pattTPasStart)) == 0)
{
rel = LHS(&prog.Image[startOff+1]); /* Get the jump offset */
rel = LH_SIGNED(&prog.Image[startOff+1]); /* Get the jump offset */
prog.offMain = rel+startOff+3; /* Save absolute image offset */
prog.offMain += 0x20; /* These first 32 bytes are setting up */
prog.segMain = prog.initCS;

143
src/control.cpp
View File

@ -35,15 +35,15 @@ static boolT isBackEdge (BB * p,BB * s)
if (p->dfsFirstNum >= s->dfsFirstNum)
{
s->numBackEdges++;
return (TRUE);
return true;
}
return (FALSE);
return false;
}
static Int commonDom (Int currImmDom, Int predImmDom, Function * pProc)
/* Finds the common dominator of the current immediate dominator
* currImmDom and its predecessor's immediate dominator predImmDom */
static Int commonDom (Int currImmDom, Int predImmDom, Function * pProc)
{
if (currImmDom == NO_DOM)
return (predImmDom);
@ -82,8 +82,7 @@ void Function::findImmedDom ()
BB* inedge=currNode->inEdges[j];
predIdx = inedge->dfsLastNum;
if (predIdx < currIdx)
currNode->immedDom = commonDom (currNode->immedDom,
predIdx, this);
currNode->immedDom = commonDom (currNode->immedDom, predIdx, this);
}
}
}
@ -183,7 +182,7 @@ static void findNodesInLoop(BB * latchNode,BB * head,Function * pProc,queue &int
head->loopFollow = latchNode->edges[ELSE].BBptr->dfsLastNum;
else
head->loopFollow = latchNode->edges[THEN].BBptr->dfsLastNum;
pProc->Icode.SetLlFlag(latchNode->start + latchNode->length - 1,JX_LOOP);
latchNode->back().SetLlFlag(JX_LOOP);
}
else
{
@ -192,7 +191,7 @@ static void findNodesInLoop(BB * latchNode,BB * head,Function * pProc,queue &int
head->loopFollow = head->edges[ELSE].BBptr->dfsLastNum;
else
head->loopFollow = head->edges[THEN].BBptr->dfsLastNum;
pProc->Icode.SetLlFlag(head->start + head->length - 1, JX_LOOP);
head->back().SetLlFlag(JX_LOOP);
}
else /* head = anything besides 2-way, latch = 2-way */
{
@ -201,8 +200,7 @@ static void findNodesInLoop(BB * latchNode,BB * head,Function * pProc,queue &int
head->loopFollow = latchNode->edges[ELSE].BBptr->dfsLastNum;
else
head->loopFollow = latchNode->edges[THEN].BBptr->dfsLastNum;
pProc->Icode.SetLlFlag(latchNode->start + latchNode->length - 1,
JX_LOOP);
latchNode->back().SetLlFlag(JX_LOOP);
}
else /* latch = 1-way */
if (latchNode->nodeType == LOOP_NODE)
@ -241,7 +239,7 @@ static void findNodesInLoop(BB * latchNode,BB * head,Function * pProc,queue &int
}
if (pbb->dfsLastNum > head->dfsLastNum)
pProc->dfsLast[head->loopFollow]->loopHead = NO_NODE; /*****/
pProc->Icode.SetLlFlag(head->start + head->length - 1, JX_LOOP);
head->back().SetLlFlag(JX_LOOP);
}
else
{
@ -252,7 +250,6 @@ static void findNodesInLoop(BB * latchNode,BB * head,Function * pProc,queue &int
freeList(loopNodes);
}
//static void findNodesInInt (queue **intNodes, Int level, interval *Ii)
/* Recursive procedure to find nodes that belong to the interval (ie. nodes
* from G1). */
@ -272,7 +269,7 @@ static void findNodesInInt (queue &intNodes, Int level, interval *Ii)
/* Algorithm for structuring loops */
static void structLoops(Function * pProc, derSeq *derivedG)
void Function::structLoops(derSeq *derivedG)
{
interval *Ii;
BB * intHead, /* interval header node */
@ -305,7 +302,6 @@ static void structLoops(Function * pProc, derSeq *derivedG)
findNodesInInt (intNodes, level, Ii);
/* Find greatest enclosing back edge (if any) */
assert(intHead->numInEdges==intHead->inEdges.size());
for (i = 0; i < intHead->inEdges.size(); i++)
{
pred = intHead->inEdges[i];
@ -329,7 +325,7 @@ static void structLoops(Function * pProc, derSeq *derivedG)
(latchNode->loopHead == NO_NODE))
{
intHead->latchNode = latchNode->dfsLastNum;
findNodesInLoop(latchNode, intHead, pProc, intNodes);
findNodesInLoop(latchNode, intHead, this, intNodes);
latchNode->flg |= IS_LATCH_NODE;
}
}
@ -352,8 +348,8 @@ static boolT successor (Int s, Int h, Function * pProc)
header = pProc->dfsLast[h];
for (i = 0; i < header->numOutEdges; i++)
if (header->edges[i].BBptr->dfsLastNum == s)
return (TRUE);
return (FALSE);
return true;
return false;
}
@ -377,44 +373,43 @@ static void tagNodesInCase (BB * pBB, nodeList &l, Int head, Int tail)
}
static void structCases(Function * pProc)
/* Structures case statements. This procedure is invoked only when pProc
* has a case node. */
{ Int i, j;
void Function::structCases()
{
Int i, j;
BB * caseHeader; /* case header node */
Int exitNode = NO_NODE; /* case exit node */
nodeList caseNodes; /* temporary: list of nodes in case */
/* Linear scan of the nodes in reverse dfsLast order, searching for
* case nodes */
for (i = pProc->numBBs - 1; i >= 0; i--)
if (pProc->dfsLast[i]->nodeType == MULTI_BRANCH)
for (i = numBBs - 1; i >= 0; i--)
if (dfsLast[i]->nodeType == MULTI_BRANCH)
{
caseHeader = pProc->dfsLast[i];
caseHeader = dfsLast[i];
/* Find descendant node which has as immediate predecessor
* the current header node, and is not a successor. */
for (j = i + 2; j < pProc->numBBs; j++)
for (j = i + 2; j < numBBs; j++)
{
if ((!successor(j, i, pProc)) &&
(pProc->dfsLast[j]->immedDom == i))
if ((!successor(j, i, this)) &&
(dfsLast[j]->immedDom == i))
if (exitNode == NO_NODE)
exitNode = j;
else if (pProc->dfsLast[exitNode]->numInEdges <
pProc->dfsLast[j]->numInEdges)
else if (dfsLast[exitNode]->inEdges.size() < dfsLast[j]->inEdges.size())
exitNode = j;
}
pProc->dfsLast[i]->caseTail = exitNode;
dfsLast[i]->caseTail = exitNode;
/* Tag nodes that belong to the case by recording the
* header field with caseHeader. */
insertList (caseNodes, i);
pProc->dfsLast[i]->caseHead = i;
dfsLast[i]->caseHead = i;
for (j = 0; j < caseHeader->numOutEdges; j++)
tagNodesInCase (caseHeader->edges[j].BBptr, caseNodes, i,
exitNode);
tagNodesInCase (caseHeader->edges[j].BBptr, caseNodes, i, exitNode);
if (exitNode != NO_NODE)
pProc->dfsLast[exitNode]->caseHead = i;
dfsLast[exitNode]->caseHead = i;
}
}
@ -434,42 +429,42 @@ static void flagNodes (nodeList &l, Int f, Function * pProc)
}
static void structIfs (Function * pProc)
/* Structures if statements */
{ Int curr, /* Index for linear scan of nodes */
void Function::structIfs ()
{
Int curr, /* Index for linear scan of nodes */
desc, /* Index for descendant */
followInEdges, /* Largest # in-edges so far */
follow; /* Possible follow node */
nodeList domDesc, /* List of nodes dominated by curr */
unresolved, /* List of unresolved if nodes */
*l; /* Temporary list */
unresolved /* List of unresolved if nodes */
;
BB * currNode, /* Pointer to current node */
* pbb;
/* Linear scan of nodes in reverse dfsLast order */
for (curr = pProc->numBBs - 1; curr >= 0; curr--)
for (curr = numBBs - 1; curr >= 0; curr--)
{
currNode = pProc->dfsLast[curr];
currNode = dfsLast[curr];
if (currNode->flg & INVALID_BB) /* Do not process invalid BBs */
continue;
if ((currNode->nodeType == TWO_BRANCH) &&
(! (pProc->Icode.GetLlFlag(currNode->start + currNode->length - 1)
& JX_LOOP)))
if ((currNode->nodeType == TWO_BRANCH) && (!currNode->back().isLlFlag(JX_LOOP)))
{
followInEdges = 0;
follow = 0;
/* Find all nodes that have this node as immediate dominator */
for (desc = curr+1; desc < pProc->numBBs; desc++)
for (desc = curr+1; desc < numBBs; desc++)
{
if (dfsLast[desc]->immedDom == curr)
{
if (pProc->dfsLast[desc]->immedDom == curr) {
insertList (domDesc, desc);
pbb = pProc->dfsLast[desc];
if ((pbb->numInEdges - pbb->numBackEdges) >= followInEdges)
pbb = dfsLast[desc];
if ((pbb->inEdges.size() - pbb->numBackEdges) >= followInEdges)
{
follow = desc;
followInEdges = pbb->numInEdges - pbb->numBackEdges;
followInEdges = pbb->inEdges.size() - pbb->numBackEdges;
}
}
}
@ -480,7 +475,7 @@ static void structIfs (Function * pProc)
{
currNode->ifFollow = follow;
if (!unresolved.empty())
flagNodes (unresolved, follow, pProc);
flagNodes (unresolved, follow, this);
}
else
insertList (unresolved, curr);
@ -515,30 +510,30 @@ void Function::compoundCond()
if (pbb->flg & INVALID_BB)
continue;
if (pbb->nodeType == TWO_BRANCH)
{
if (pbb->nodeType != TWO_BRANCH)
continue;
t = pbb->edges[THEN].BBptr;
e = pbb->edges[ELSE].BBptr;
/* Check (X || Y) case */
if ((t->nodeType == TWO_BRANCH) && (t->numHlIcodes == 1) &&
(t->numInEdges == 1) && (t->edges[ELSE].BBptr == e))
(t->inEdges.size() == 1) && (t->edges[ELSE].BBptr == e))
{
obb = t->edges[THEN].BBptr;
/* Construct compound DBL_OR expression */
picode = this->Icode.GetIcode(pbb->start + pbb->length -1);
ticode = this->Icode.GetIcode(t->start + t->length -1);
picode = &pbb->back();
ticode = &t->back();
exp = COND_EXPR::boolOp (picode->ic.hl.oper.exp,
ticode->ic.hl.oper.exp, DBL_OR);
picode->ic.hl.oper.exp = exp;
/* Replace in-edge to obb from t to pbb */
for (j = 0; j < obb->numInEdges; j++)
if (obb->inEdges[j] == t)
{
obb->inEdges[j] = pbb;
break;
auto iter=find(obb->inEdges.begin(),obb->inEdges.end(),t);
if(iter!=obb->inEdges.end())
*iter = pbb;
}
/* New THEN out-edge of pbb */
@ -548,8 +543,6 @@ void Function::compoundCond()
auto iter=std::find(e->inEdges.begin(),e->inEdges.end(),t);
assert(iter!=e->inEdges.end());
e->inEdges.erase(iter);
e->numInEdges--; /* looses 1 arc */
assert(e->numInEdges==e->inEdges.size());
t->flg |= INVALID_BB;
if (pbb->flg & IS_LATCH_NODE)
@ -562,13 +555,14 @@ void Function::compoundCond()
/* Check (!X && Y) case */
else if ((t->nodeType == TWO_BRANCH) && (t->numHlIcodes == 1) &&
(t->numInEdges == 1) && (t->edges[THEN].BBptr == e))
(t->inEdges.size() == 1) && (t->edges[THEN].BBptr == e))
{
obb = t->edges[ELSE].BBptr;
/* Construct compound DBL_AND expression */
picode = this->Icode.GetIcode(pbb->start + pbb->length -1);
ticode = this->Icode.GetIcode(t->start + t->length -1);
picode = &pbb->back();
ticode = &t->back();
inverseCondOp (&picode->ic.hl.oper.exp);
exp = COND_EXPR::boolOp (picode->ic.hl.oper.exp,
ticode->ic.hl.oper.exp, DBL_AND);
@ -587,8 +581,6 @@ void Function::compoundCond()
iter=std::find(e->inEdges.begin(),e->inEdges.end(),t);
assert(iter!=e->inEdges.end());
e->inEdges.erase(iter); /* looses 1 arc */
e->numInEdges--; /* looses 1 arc */
assert(t->inEdges.size()==t->numInEdges);
t->flg |= INVALID_BB;
if (pbb->flg & IS_LATCH_NODE)
@ -601,13 +593,14 @@ void Function::compoundCond()
/* Check (X && Y) case */
else if ((e->nodeType == TWO_BRANCH) && (e->numHlIcodes == 1) &&
(e->numInEdges == 1) && (e->edges[THEN].BBptr == t))
(e->inEdges.size()==1) && (e->edges[THEN].BBptr == t))
{
obb = e->edges[ELSE].BBptr;
/* Construct compound DBL_AND expression */
picode = this->Icode.GetIcode(pbb->start + pbb->length -1);
ticode = this->Icode.GetIcode(t->start + t->length -1);
picode = &pbb->back();
ticode = &t->back();
exp = COND_EXPR::boolOp (picode->ic.hl.oper.exp,
ticode->ic.hl.oper.exp, DBL_AND);
picode->ic.hl.oper.exp = exp;
@ -623,8 +616,6 @@ void Function::compoundCond()
iter = std::find(t->inEdges.begin(),t->inEdges.end(),e);
assert(iter!=t->inEdges.end());
t->inEdges.erase(iter);
t->numInEdges--; /* looses 1 arc */
assert(t->inEdges.size()==t->numInEdges);
e->flg |= INVALID_BB;
if (pbb->flg & IS_LATCH_NODE)
@ -637,20 +628,19 @@ void Function::compoundCond()
/* Check (!X || Y) case */
else if ((e->nodeType == TWO_BRANCH) && (e->numHlIcodes == 1) &&
(e->numInEdges == 1) && (e->edges[ELSE].BBptr == t))
(e->inEdges.size() == 1) && (e->edges[ELSE].BBptr == t))
{
obb = e->edges[THEN].BBptr;
/* Construct compound DBL_OR expression */
picode = this->Icode.GetIcode(pbb->start + pbb->length -1);
ticode = this->Icode.GetIcode(t->start + t->length -1);
picode = &pbb->back();
ticode = &t->back();
inverseCondOp (&picode->ic.hl.oper.exp);
exp = COND_EXPR::boolOp (picode->ic.hl.oper.exp,
ticode->ic.hl.oper.exp, DBL_OR);
picode->ic.hl.oper.exp = exp;
/* Replace in-edge to obb from e to pbb */
assert(obb->numInEdges==obb->inEdges.size());
auto iter = std::find(obb->inEdges.begin(),obb->inEdges.end(),e);
assert(iter!=obb->inEdges.end());
*iter=pbb;
@ -663,8 +653,6 @@ void Function::compoundCond()
iter = std::find(t->inEdges.begin(),t->inEdges.end(),e);
assert(iter!=t->inEdges.end());
t->inEdges.erase(iter);
t->numInEdges--; /* looses 1 arc */
assert(t->numInEdges=t->inEdges.size());
e->flg |= INVALID_BB;
if (pbb->flg & IS_LATCH_NODE)
@ -676,17 +664,16 @@ void Function::compoundCond()
}
}
}
}
}
void Function::structure(derSeq *derivedG)
/* Structuring algorithm to find the structures of the graph pProc->cfg */
void Function::structure(derSeq *derivedG)
{
/* Find immediate dominators of the graph */
findImmedDom();
if (hasCase)
structCases(this);
structLoops(this, derivedG);
structIfs(this);
structCases();
structLoops(derivedG);
structIfs();
}

30
src/dataflow.cpp
View File

@ -24,7 +24,8 @@ Int STKFRAME::getLocVar(Int off)
/* Returns a string with the source operand of Icode */
static COND_EXPR *srcIdent (ICODE * Icode, Function * pProc, Int i, ICODE * duIcode, operDu du)
{ COND_EXPR *n;
{
COND_EXPR *n;
if (Icode->ic.ll.flg & I) /* immediate operand */
{
@ -99,7 +100,7 @@ void Function::elimCondCodes ()
case iOR:
lhs = Icode.GetIcode(defAt-1)->ic.hl.oper.asgn.lhs->clone();
copyDU (Icode.GetIcode(useAt-1),Icode.GetIcode(defAt-1), eUSE, eDEF);
Icode[useAt-1].copyDU(Icode[defAt-1], eUSE, eDEF);
if (Icode.GetLlFlag(defAt-1) & B)
rhs = COND_EXPR::idKte (0, 1);
else
@ -164,8 +165,8 @@ void Function::elimCondCodes ()
{
exp = prev->ic.hl.oper.exp->clone();
exp->changeBoolOp (condOpJCond[Icode.GetLlOpcode(useAt-1)-iJB]);
copyDU (Icode.GetIcode(useAt-1), prev, eUSE, eUSE);
Icode.GetIcode(useAt-1)->setJCond(exp);
Icode[useAt-1].copyDU(*prev, eUSE, eUSE);
Icode[useAt-1].setJCond(exp);
}
}
/* Error - definition not found for use of a cond code */
@ -452,8 +453,7 @@ void Function::genDU1 ()
{
if (! (pbb->liveOut & duReg[regi])) /* not liveOut */
{
res = removeDefRegi (regi, picode, defRegIdx+1,
&localId);
res = picode->removeDefRegi (regi, defRegIdx+1,&localId);
/* Backpatch any uses of this instruction, within
* the same BB, if the instruction was invalidated */
@ -567,7 +567,7 @@ static boolT xClear (COND_EXPR *rhs, Int f, Int t, Int lastBBinst, Function * pp
ICODE * picode;
if (rhs == NULL)
return (FALSE);
return false;
switch (rhs->type) {
case IDENTIFIER:
@ -580,15 +580,15 @@ static boolT xClear (COND_EXPR *rhs, Int f, Int t, Int lastBBinst, Function * pp
(picode[i].invalid == FALSE))
{
if (picode[i].du.def & duReg[regi])
return (FALSE);
return false;
}
if (i < lastBBinst)
return (TRUE);
return true;
else
return (FALSE);
return false;
}
else
return (TRUE);
return true;
/* else if (rhs->expr.ident.idType == LONG_VAR)
{
missing all other identifiers ****
@ -597,7 +597,7 @@ missing all other identifiers ****
case BOOLEAN_OP:
res = xClear (rhs->expr.boolExpr.rhs, f, t, lastBBinst, pproc);
if (res == FALSE)
return (FALSE);
return false;
return (xClear (rhs->expr.boolExpr.lhs, f, t, lastBBinst, pproc));
case NEGATION:
@ -652,7 +652,7 @@ static void processCArg (Function * pp, Function * pProc, ICODE * picode, Int nu
* For HLI_CALL hlIcodes, places the arguments in the argument list. */
void Function::findExps()
{
Int i, j, k, lastInst, lastInstN, numHlIcodes;
Int i, j, k, lastInst, numHlIcodes;
ICODE * picode, /* Current icode */
* ticode; /* Target icode */
BB * pbb; /* Current and next basic block */
@ -728,7 +728,7 @@ void Function::findExps()
break;
case HLI_CALL: /* register arguments */
newRegArg (this, picode, ticode);
newRegArg (picode, ticode);
picode->invalidate();
numHlIcodes--;
break;
@ -866,7 +866,7 @@ void Function::findExps()
break;
case HLI_CALL: /* register arguments */
newRegArg (this, picode, ticode);
newRegArg ( picode, ticode);
picode->invalidate();
numHlIcodes--;
break;

2
src/dcc.cpp
View File

@ -23,7 +23,7 @@ PROG prog; /* programs fields */
OPTION option; /* Command line options */
//Function * pProcList; /* List of procedures, topologically sort */
//Function * pLastProc; /* Pointer to last node in procedure list */
std::list<Function> pProcList;
FunctionListType pProcList;
CALL_GRAPH *callGraph; /* Call graph of the program */
static char *initargs(int argc, char *argv[]);

10
src/disassem.cpp
View File

@ -1483,17 +1483,17 @@ boolT callArg(word off, char *sym)
imageOff = off + ((dword)pProc->state.r[rCS] << 4);
/* Search procedure list for one with appropriate entry point */
std::list<Function>::iterator iter= std::find_if(pProcList.begin(),pProcList.end(),
FunctionListType::iterator iter= std::find_if(pProcList.begin(),pProcList.end(),
[imageOff](const Function &f) -> bool { return f.procEntry==imageOff; });
if(iter==pProcList.end())
{
/* No existing proc entry */
//ERROR: dereferencing NULL !?!
//LibCheck(*iter);
Function x;
x.procEntry=imageOff;
LibCheck(x);
if (x.flg & PROC_ISLIB)
Function *x=Function::Create();
x->procEntry=imageOff;
LibCheck(*x);
if (x->flg & PROC_ISLIB)
{
/* No entry for this proc, but it is a library function.
Create an entry for it */

54
src/graph.cpp
View File

@ -47,7 +47,9 @@ void Function::createCFG()
! (pIcode->ic.ll.flg & TERMINATES) &&
pIcode->ic.ll.opcode != iJMP && pIcode->ic.ll.opcode != iJMPF &&
pIcode->ic.ll.opcode != iRET && pIcode->ic.ll.opcode != iRETF)
{
pBB=BB::Create(start, ip, NOWHERE_NODE, 0, this);
}
/* Only process icodes that have valid instructions */
else if ((pIcode->ic.ll.flg & NO_CODE) != NO_CODE)
@ -64,7 +66,10 @@ CondJumps:
pBB->edges[0].ip = (dword)start;
/* This is for jumps off into nowhere */
if (pIcode->ic.ll.flg & NO_LABEL)
{
pBB->numOutEdges--;
pBB->edges.pop_back();
}
else
pBB->edges[1].ip = pIcode->ic.ll.immed.op;
break;
@ -76,13 +81,13 @@ CondJumps:
case iJMPF: case iJMP:
if (pIcode->ic.ll.flg & SWITCH)
{
pBB = BB::Create(start, ip, MULTI_BRANCH,
pIcode->ic.ll.caseTbl.numEntries, this);
pBB = BB::Create(start, ip, MULTI_BRANCH, pIcode->ic.ll.caseTbl.numEntries, this);
for (i = 0; i < pIcode->ic.ll.caseTbl.numEntries; i++)
pBB->edges[i].ip = pIcode->ic.ll.caseTbl.entries[i];
hasCase = TRUE;
}
else if ((pIcode->ic.ll.flg & (I | NO_LABEL)) == I) {
else if ((pIcode->ic.ll.flg & (I | NO_LABEL)) == I)
{
pBB = BB::Create(start, ip, ONE_BRANCH, 1, this);
pBB->edges[0].ip = pIcode->ic.ll.immed.op;
}
@ -137,17 +142,17 @@ CondJumps:
{
ip = pBB->edges[i].ip;
if (ip >= SYNTHESIZED_MIN)
fatalError (INVALID_SYNTHETIC_BB);
else
{
fatalError (INVALID_SYNTHETIC_BB);
return ;
}
auto iter2=std::find_if(heldBBs.begin(),heldBBs.end(),
[ip](BB *psBB)->bool {return psBB->start==ip;});
[ip](BB *psBB)->bool {return psBB->begin()==ip;});
if(iter2==heldBBs.end())
fatalError(NO_BB, ip, name);
psBB = *iter2;
pBB->edges[i].BBptr = psBB;
psBB->numInEdges++;
}
psBB->inEdges.push_back(0);
}
}
}
@ -203,11 +208,11 @@ void Function::compressCFG()
for (;iter!=cfg.end(); ++iter)
{
pBB = *iter;
pBB->inEdges.resize(pBB->numInEdges,0);
if (pBB->numInEdges != 0 && (pBB->nodeType == ONE_BRANCH || pBB->nodeType == TWO_BRANCH))
if(pBB->inEdges.empty() || (pBB->nodeType != ONE_BRANCH && pBB->nodeType != TWO_BRANCH))
continue;
for (i = 0; i < pBB->numOutEdges; i++)
{
ip = pBB->start + pBB->length - 1;
ip = pBB->rbegin();
pNxt = rmJMP(this, ip, pBB->edges[i].BBptr);
if (pBB->numOutEdges) /* Might have been clobbered */
@ -230,7 +235,7 @@ void Function::compressCFG()
for(auto iter=cfg.begin(); iter!=cfg.end(); ++iter)
{
pBB = *iter;
if (pBB->numInEdges == 0)
if (pBB->inEdges.empty())
{
if (iter == cfg.begin()) /* Init it misses out on */
pBB->index = UN_INIT;
@ -244,7 +249,7 @@ void Function::compressCFG()
}
else
{
pBB->inEdgeCount = pBB->numInEdges;
pBB->inEdgeCount = pBB->inEdges.size();
}
}
@ -265,11 +270,16 @@ static BB * rmJMP(Function * pProc, Int marker, BB * pBB)
{
marker += DFS_JMP;
while (pBB->nodeType == ONE_BRANCH && pBB->length == 1) {
if (pBB->traversed != marker) {
while (pBB->nodeType == ONE_BRANCH && pBB->length == 1)
{
if (pBB->traversed != marker)
{
pBB->traversed = marker;
if (--pBB->numInEdges)
pBB->edges[0].BBptr->numInEdges++;
pBB->inEdges.pop_back();
if (not pBB->inEdges.empty())
{
pBB->edges[0].BBptr->inEdges.push_back(0);
}
else
{
pProc->Icode.SetLlFlag(pBB->start, NO_CODE);
@ -284,7 +294,8 @@ static BB * rmJMP(Function * pProc, Int marker, BB * pBB)
pProc->Icode.SetImmediateOp(pBB->start, (dword)pBB->start);
do {
pBB = pBB->edges[0].BBptr;
if (! --pBB->numInEdges)
pBB->inEdges.pop_back(); // was --numInedges
if (! pBB->inEdges.empty())
{
pProc->Icode.SetLlFlag(pBB->start, NO_CODE);
pProc->Icode.SetLlInvalid(pBB->start, TRUE);
@ -328,7 +339,7 @@ void BB::mergeFallThrough( CIcodeRec &Icode)
}
/* If there's no other edges into child can merge */
if (pChild->numInEdges != 1)
if (pChild->inEdges.size() != 1)
break;
nodeType = pChild->nodeType;
@ -337,7 +348,8 @@ void BB::mergeFallThrough( CIcodeRec &Icode)
numOutEdges = pChild->numOutEdges;
edges.swap(pChild->edges);
pChild->numOutEdges = pChild->numInEdges = 0;
pChild->numOutEdges = 0;
pChild->inEdges.clear();
pChild->edges.clear();
}
traversed = DFS_MERGE;
@ -368,7 +380,7 @@ void BB::dfsNumbering(std::vector<BB *> &dfsLast, Int *first, Int *last)
pChild->inEdges[pChild->index++] = this;
/* Is this the last visit? */
if (pChild->index == pChild->numInEdges)
if (pChild->index == pChild->inEdges.size())
pChild->index = UN_INIT;
if (pChild->traversed != DFS_NUM)

32
src/hlicode.cpp
View File

@ -83,37 +83,39 @@ void ICODE ::invalidate()
/* Removes the defined register regi from the lhs subtree. If all registers
* of this instruction are unused, the instruction is invalidated (ie.
* removed) */
boolT removeDefRegi (byte regi, ICODE *picode, Int thisDefIdx, LOCAL_ID *locId)
{ Int numDefs;
boolT ICODE::removeDefRegi (byte regi, Int thisDefIdx, LOCAL_ID *locId)
{
Int numDefs;
numDefs = picode->du1.numRegsDef;
numDefs = du1.numRegsDef;
if (numDefs == thisDefIdx)
for ( ; numDefs > 0; numDefs--)
{
if ((picode->du1.idx[numDefs-1][0] != 0)||(picode->du.lastDefRegi))
if ((du1.idx[numDefs-1][0] != 0)||(du.lastDefRegi))
break;
}
if (numDefs == 0)
{
picode->invalidate();
return (TRUE);
invalidate();
return true;
}
else
{
switch (picode->ic.hl.opcode) {
case HLI_ASSIGN: removeRegFromLong (regi, locId,
picode->ic.hl.oper.asgn.lhs);
picode->du1.numRegsDef--;
picode->du.def &= maskDuReg[regi];
switch (ic.hl.opcode) {
case HLI_ASSIGN:
removeRegFromLong (regi, locId,ic.hl.oper.asgn.lhs);
du1.numRegsDef--;
du.def &= maskDuReg[regi];
break;
case HLI_POP:
case HLI_PUSH: removeRegFromLong (regi, locId, picode->ic.hl.oper.exp);
picode->du1.numRegsDef--;
picode->du.def &= maskDuReg[regi];
case HLI_PUSH:
removeRegFromLong (regi, locId, ic.hl.oper.exp);
du1.numRegsDef--;
du.def &= maskDuReg[regi];
break;
}
return (FALSE);
return false;
}
}

24
src/icode.cpp
View File

@ -5,6 +5,7 @@
#include <malloc.h>
#include <memory.h>
#include "dcc.h"
#include "types.h" // Common types like byte, etc
#include "ast.h" // Some icode types depend on these
#include "icode.h"
@ -118,6 +119,27 @@ ICODE * CIcodeRec::GetIcode(int ip)
return &at(ip);
}
extern char *indent(int level);
extern Int getNextLabel();
extern bundle cCode;
/* Checks the given icode to determine whether it has a label associated
* to it. If so, a goto is emitted to this label; otherwise, a new label
* is created and a goto is also emitted.
* Note: this procedure is to be used when the label is to be backpatched
* onto code in cCode.code */
void ICODE::emitGotoLabel (Int indLevel)
{
if (! (ic.ll.flg & HLL_LABEL)) /* node hasn't got a lab */
{
/* Generate new label */
ic.ll.hllLabNum = getNextLabel();
ic.ll.flg |= HLL_LABEL;
/* Node has been traversed already, so backpatch this label into
* the code */
addLabelBundle (cCode.code, codeIdx, ic.ll.hllLabNum);
}
cCode.appendCode( "%sgoto L%ld;\n", indent(indLevel), ic.ll.hllLabNum);
stats.numHLIcode++;
}

84
src/idioms.cpp
View File

@ -324,8 +324,8 @@ static boolT idiom5 (ICODE * pIcode, ICODE * pEnd)
{
if (pIcode < pEnd)
if ((pIcode+1)->ic.ll.opcode == iADC)
return (TRUE);
return (FALSE);
return true;
return false;
}
@ -343,8 +343,8 @@ static boolT idiom6 (ICODE * pIcode, ICODE * pEnd)
{
if (pIcode < pEnd)
if ((pIcode+1)->ic.ll.opcode == iSBB)
return (TRUE);
return (FALSE);
return true;
return false;
}
@ -364,21 +364,21 @@ static boolT idiom7 (ICODE * pIcode)
if (dst->regi == 0) /* global variable */
{
if ((dst->segValue == src->segValue) && (dst->off == src->off))
return (TRUE);
return true;
}
else if (dst->regi < INDEXBASE) /* register */
{
if (dst->regi == src->regi)
return (TRUE);
return true;
}
else if ((dst->off) && (dst->seg == rSS) && (dst->regi == INDEXBASE + 6))
/* offset from BP */
{
if ((dst->off == src->off) && (dst->seg == src->seg) &&
(dst->regi == src->regi))
return (TRUE);
return true;
}
return (FALSE);
return false;
}
@ -406,12 +406,12 @@ static boolT idiom21 (ICODE * picode, ICODE * pend)
(dst->regi < INDEXBASE))
{
if ((dst->regi == rDX) && ((picode+1)->ic.ll.dst.regi == rAX))
return (TRUE);
return true;
if ((dst->regi == rCX) && ((picode+1)->ic.ll.dst.regi == rBX))
return (TRUE);
return true;
}
}
return (FALSE);
return false;
}
@ -432,9 +432,9 @@ static boolT idiom8 (ICODE * pIcode, ICODE * pEnd)
if (((pIcode+1)->ic.ll.opcode == iRCR) &&
(((pIcode+1)->ic.ll.flg & I) == I) &&
((pIcode+1)->ic.ll.immed.op == 1))
return (TRUE);
return true;
}
return (FALSE);
return false;
}
@ -496,9 +496,9 @@ static boolT idiom12 (ICODE * pIcode, ICODE * pEnd)
if (((pIcode+1)->ic.ll.opcode == iRCL) &&
(((pIcode+1)->ic.ll.flg & I) == I) &&
((pIcode+1)->ic.ll.immed.op == 1))
return (TRUE);
return true;
}
return (FALSE);
return false;
}
@ -519,9 +519,9 @@ static boolT idiom9 (ICODE * pIcode, ICODE * pEnd)
if (((pIcode+1)->ic.ll.opcode == iRCR) &&
(((pIcode+1)->ic.ll.flg & I) == I) &&
((pIcode+1)->ic.ll.immed.op == 1))
return (TRUE);
return true;
}
return (FALSE);
return false;
}
@ -552,13 +552,13 @@ static boolT idiom10old (ICODE * pIcode, ICODE * pEnd)
if (((pIcode+1)->ic.ll.opcode == iJNE) &&
((pIcode+2)->ic.ll.opcode != iCMP) &&
((pIcode+3)->ic.ll.opcode != iJE))
return (TRUE);
return true;
}
else /* at the end of the procedure */
if (((pIcode+1) < pEnd) && ((pIcode+1)->ic.ll.opcode == iJNE))
return (TRUE);
return true;
}
return (FALSE);
return false;
}
@ -664,14 +664,14 @@ static boolT idiom14 (ICODE * picode, ICODE * pend, byte *regL, byte *regH)
if (*regH == (picode+1)->ic.ll.src.regi)
{
if ((*regL == rAX) && (*regH == rDX))
return (TRUE);
return true;
if ((*regL == rBX) && (*regH == rCX))
return (TRUE);
return true;
}
}
}
}
return (FALSE);
return false;
}
/*****************************************************************************
@ -702,21 +702,21 @@ static boolT idiom11 (ICODE * pIcode, ICODE * pEnd)
pIcode->ic.ll.dst.segValue) &&
((pIcode+2)->ic.ll.dst.off ==
pIcode->ic.ll.dst.off))
return (TRUE);
return true;
break;
case REGISTER: if ((pIcode+2)->ic.ll.dst.regi ==
pIcode->ic.ll.dst.regi)
return (TRUE);
return true;
break;
case PARAM:
case LOCAL_VAR: if ((pIcode+2)->ic.ll.dst.off ==
pIcode->ic.ll.dst.off)
return (TRUE);
return true;
break;
}
}
}
return (FALSE);
return false;
}
@ -746,10 +746,10 @@ static boolT idiom16 (ICODE * picode, ICODE * pend)
((picode+1)->ic.ll.src.regi)) &&
((picode+1)->ic.ll.dst.regi == regi) &&
((picode+2)->ic.ll.dst.regi == regi))
return (TRUE);
return true;
}
}
return (FALSE);
return false;
}
@ -800,7 +800,7 @@ static boolT idiom18 (ICODE * picode, ICODE * pend, Function * pproc)
((picode+1)->ic.ll.dst.regi == regi) &&
(((picode+2)->ic.ll.opcode >= iJB) &&
((picode+2)->ic.ll.opcode < iJCXZ)))
return (TRUE);
return true;
}
}
}
@ -817,11 +817,11 @@ static boolT idiom18 (ICODE * picode, ICODE * pend, Function * pproc)
((picode+1)->ic.ll.dst.regi == regi) &&
(((picode+2)->ic.ll.opcode >= iJB) &&
((picode+2)->ic.ll.opcode < iJCXZ)))
return (TRUE);
return true;
}
}
}
return (FALSE);
return false;
}
@ -846,17 +846,17 @@ static boolT idiom19 (ICODE * picode, ICODE * pend, Function * pproc)
((picode->ic.ll.dst.regi == rDI) && (pproc->flg & DI_REGVAR)))
if ((picode < pend) && ((picode+1)->ic.ll.opcode >= iJB) &&
((picode+1)->ic.ll.opcode < iJCXZ))
return (TRUE);
return true;
}
else if (picode->ic.ll.dst.off) /* stack variable */
{
if ((picode < pend) && ((picode+1)->ic.ll.opcode >= iJB) &&
((picode+1)->ic.ll.opcode < iJCXZ))
return (TRUE);
return true;
}
else /* indexed */
/* not supported yet */ ;
return (FALSE);
return false;
}
@ -908,7 +908,7 @@ static boolT idiom20 (ICODE * picode, ICODE * pend, Function * pproc)
((picode+2)->ic.ll.dst.regi == regi) &&
(((picode+3)->ic.ll.opcode >= iJB) &&
((picode+3)->ic.ll.opcode < iJCXZ)))
return (TRUE);
return true;
}
}
}
@ -925,11 +925,11 @@ static boolT idiom20 (ICODE * picode, ICODE * pend, Function * pproc)
((picode+2)->ic.ll.dst.regi == regi) &&
(((picode+3)->ic.ll.opcode >= iJB) &&
((picode+3)->ic.ll.opcode < iJCXZ)))
return (TRUE);
return true;
}
}
}
return (FALSE);
return false;
}
@ -946,7 +946,7 @@ void Function::findIdioms()
Int idx; /* Index into local identifier table */
byte regH, regL; /* High and low registers for long word reg */
pIcode = Icode.GetFirstIcode();
pIcode = &Icode.front();
pEnd = pIcode + Icode.GetNumIcodes();
ip = 0;
@ -1192,10 +1192,8 @@ void Function::findIdioms()
case iSUB: /* Idiom 6 */
if (idiom6 (pIcode, pEnd))
{
lhs = COND_EXPR::idLong (&localId, DST, pIcode, LOW_FIRST,
ip, USE_DEF, 1);
rhs = COND_EXPR::idLong (&localId, SRC, pIcode, LOW_FIRST,
ip, eUSE, 1);
lhs = COND_EXPR::idLong (&localId, DST, pIcode, LOW_FIRST, ip, USE_DEF, 1);
rhs = COND_EXPR::idLong (&localId, SRC, pIcode, LOW_FIRST, ip, eUSE, 1);
exp = COND_EXPR::boolOp (lhs, rhs, SUB);
pIcode->setAsgn(lhs, exp);
(pIcode+1)->invalidate();

12
src/locident.cpp
View File

@ -321,16 +321,16 @@ boolT checkLongEq (LONG_STKID_TYPE longId, ICODE *pIcode, Int i, Int idx,
if ((pIcode->ic.ll.flg & NO_SRC) != NO_SRC)
*rhs = COND_EXPR::idLong (&pProc->localId, SRC, pIcode, HIGH_FIRST,
idx, eUSE, off);
return (TRUE);
return true;
}
else if ((longId.offH == pmHsrc->off) && (longId.offL == pmLsrc->off))
{
*lhs = COND_EXPR::idLong (&pProc->localId, DST, pIcode, HIGH_FIRST, idx,
eDEF, off);
*rhs = COND_EXPR::idLongIdx (i);
return (TRUE);
return true;
}
return (FALSE);
return false;
}
@ -358,15 +358,15 @@ boolT checkLongRegEq (LONGID_TYPE longId, ICODE *pIcode, Int i, Int idx,
*lhs = COND_EXPR::idLongIdx (i);
if ((pIcode->ic.ll.flg & NO_SRC) != NO_SRC)
*rhs = COND_EXPR::idLong (&pProc->localId, SRC, pIcode, HIGH_FIRST, idx, eUSE, off);
return (TRUE);
return true;
}
else if ((longId.h == pmHsrc->regi) && (longId.l == pmLsrc->regi))
{
*lhs = COND_EXPR::idLong (&pProc->localId, DST, pIcode, HIGH_FIRST, idx, eDEF, off);
*rhs = COND_EXPR::idLongIdx (i);
return (TRUE);
return true;
}
return (FALSE);
return false;
}

9
src/parser.cpp
View File

@ -48,7 +48,9 @@ void parse (CALL_GRAPH * *pcallGraph)
state.checkStartup();
/* Make a struct for the initial procedure */
pProcList.resize(1); // default-construct a Function object !
// default-construct a Function object !
pProcList.push_back(Function::Create());
if (prog.offMain != -1)
{
/* We know where main() is. Start the flow of control from there */
@ -558,14 +560,14 @@ boolT Function::process_CALL (ICODE * pIcode, CALL_GRAPH * pcallGraph, STATE *ps
if (pIcode->ic.ll.flg & I)
{
/* Search procedure list for one with appropriate entry point */
std::list<Function>::iterator iter= std::find_if(pProcList.begin(),pProcList.end(),
ilFunction iter= std::find_if(pProcList.begin(),pProcList.end(),
[pIcode](const Function &f) ->
bool { return f.procEntry==pIcode->ic.ll.immed.op; });
/* Create a new procedure node and save copy of the state */
if (iter==pProcList.end())
{
pProcList.push_back(Function());
pProcList.push_back(Function::Create());
Function &x(pProcList.back());
iter = (++pProcList.rbegin()).base();
x.procEntry = pIcode->ic.ll.immed.op;
@ -576,7 +578,6 @@ boolT Function::process_CALL (ICODE * pIcode, CALL_GRAPH * pcallGraph, STATE *ps
/* A library function. No need to do any more to it */
pcallGraph->insertCallGraph (this, iter);
iter = (++pProcList.rbegin()).base();
Icode.GetIcode(ip)->ic.ll.immed.proc.proc = &x;
return false;
}

23
src/procs.cpp
View File

@ -49,7 +49,7 @@ boolT CALL_GRAPH::insertCallGraph(ilFunction caller, ilFunction callee)
if (proc == caller)
{
insertArc (callee);
return (TRUE);
return true;
}
else
{
@ -96,7 +96,7 @@ void CALL_GRAPH::write()
/* Updates the argument table by including the register(s) (ie. lhs of
* picode) and the actual expression (ie. rhs of picode).
* Note: register(s) are only included once in the table. */
void newRegArg (Function * pproc, ICODE *picode, ICODE *ticode)
void Function::newRegArg(ICODE *picode, ICODE *ticode)
{
COND_EXPR *lhs;
STKFRAME * ps, *ts;
@ -118,7 +118,7 @@ void newRegArg (Function * pproc, ICODE *picode, ICODE *ticode)
type = lhs->expr.ident.idType;
if (type == REGISTER)
{
regL = pproc->localId.id_arr[lhs->expr.ident.idNode.regiIdx].id.regi;
regL = localId.id_arr[lhs->expr.ident.idNode.regiIdx].id.regi;
if (regL < rAL)
tidx = tproc->localId.newByteWordReg(TYPE_WORD_SIGN, regL);
else
@ -126,8 +126,8 @@ void newRegArg (Function * pproc, ICODE *picode, ICODE *ticode)
}
else if (type == LONG_VAR)
{
regL = pproc->localId.id_arr[lhs->expr.ident.idNode.longIdx].id.longId.l;
regH = pproc->localId.id_arr[lhs->expr.ident.idNode.longIdx].id.longId.h;
regL = localId.id_arr[lhs->expr.ident.idNode.longIdx].id.longId.l;
regH = localId.id_arr[lhs->expr.ident.idNode.longIdx].id.longId.h;
tidx = tproc->localId.newLongReg(TYPE_LONG_SIGN, regH, regL, 0);
}
@ -194,7 +194,7 @@ void newRegArg (Function * pproc, ICODE *picode, ICODE *ticode)
/* Mask off high and low register(s) in picode */
switch (type) {
case REGISTER:
id = &pproc->localId.id_arr[lhs->expr.ident.idNode.regiIdx];
id = &localId.id_arr[lhs->expr.ident.idNode.regiIdx];
picode->du.def &= maskDuReg[id->id.regi];
if (id->id.regi < rAL)
newsym.type = TYPE_WORD_SIGN;
@ -202,7 +202,7 @@ void newRegArg (Function * pproc, ICODE *picode, ICODE *ticode)
newsym.type = TYPE_BYTE_SIGN;
break;
case LONG_VAR:
id = &pproc->localId.id_arr[lhs->expr.ident.idNode.longIdx];
id = &localId.id_arr[lhs->expr.ident.idNode.longIdx];
picode->du.def &= maskDuReg[id->id.longId.h];
picode->du.def &= maskDuReg[id->id.longId.l];
newsym.type = TYPE_LONG_SIGN;
@ -225,12 +225,13 @@ void allocStkArgs (ICODE *picode, Int num)
}
boolT newStkArg (ICODE *picode, COND_EXPR *exp, llIcode opcode, Function * pproc)
/* Inserts the new expression (ie. the actual parameter) on the argument
* list.
* Returns: TRUE if it was a near call that made use of a segment register.
* FALSE elsewhere */
{ STKFRAME * ps;
boolT newStkArg (ICODE *picode, COND_EXPR *exp, llIcode opcode, Function * pproc)
{
STKFRAME * ps;
byte regi;
/* Check for far procedure call, in which case, references to segment
@ -243,9 +244,9 @@ boolT newStkArg (ICODE *picode, COND_EXPR *exp, llIcode opcode, Function * pproc
regi = pproc->localId.id_arr[exp->expr.ident.idNode.regiIdx].id.regi;
if ((regi >= rES) && (regi <= rDS))
if (opcode == iCALLF)
return (FALSE);
return false;
else
return (TRUE);
return true;
}
}

54
src/proplong.cpp
View File

@ -16,8 +16,8 @@ static boolT isJCond (llIcode opcode)
* high-level conditional jump icodes (iJB..iJG) */
{
if ((opcode >= iJB) && (opcode <= iJG))
return (TRUE);
return (FALSE);
return true;
return false;
}
@ -26,12 +26,12 @@ static boolT isLong23 (Int i, BB * pbb, ICODE * icode, Int *off, Int *arc)
{ BB * t, * e, * obb2;
if (pbb->nodeType != TWO_BRANCH)
return (FALSE);
return false;
t = pbb->edges[THEN].BBptr;
e = pbb->edges[ELSE].BBptr;
/* Check along the THEN path */
if ((t->length == 1) && (t->nodeType == TWO_BRANCH) && (t->numInEdges == 1))
if ((t->length == 1) && (t->nodeType == TWO_BRANCH) && (t->inEdges.size() == 1))
{
obb2 = t->edges[THEN].BBptr;
if ((obb2->length == 2) && (obb2->nodeType == TWO_BRANCH) &&
@ -39,13 +39,13 @@ static boolT isLong23 (Int i, BB * pbb, ICODE * icode, Int *off, Int *arc)
{
*off = obb2->start - i;
*arc = THEN;
return (TRUE);
return true;
}
}
/* Check along the ELSE path */
else if ((e->length == 1) && (e->nodeType == TWO_BRANCH) &&
(e->numInEdges == 1))
(e->inEdges.size() == 1))
{
obb2 = e->edges[THEN].BBptr;
if ((obb2->length == 2) && (obb2->nodeType == TWO_BRANCH) &&
@ -53,10 +53,10 @@ static boolT isLong23 (Int i, BB * pbb, ICODE * icode, Int *off, Int *arc)
{
*off = obb2->start - i;
*arc = ELSE;
return (TRUE);
return true;
}
}
return (FALSE);
return false;
}
@ -68,9 +68,9 @@ static boolT isLong22 (ICODE * pIcode, ICODE * pEnd, Int *off)
(isJCond ((pIcode+3)->ic.ll.opcode)))
{
*off = 2;
return (TRUE);
return true;
}
return (FALSE);
return false;
}
@ -101,17 +101,13 @@ static void longJCond23 (COND_EXPR *rhs, COND_EXPR *lhs, ICODE * pIcode,
}
);
tbb->inEdges.erase(newlast,tbb->inEdges.end());
tbb->numInEdges--; /* looses 2 arcs, gains 1 arc */
tbb->inEdges.push_back(pbb);
assert(tbb->inEdges.size()==tbb->numInEdges);
tbb->inEdges.push_back(pbb); /* looses 2 arcs, gains 1 arc */
/* Modify in edges of the ELSE basic block */
tbb = pbb->edges[ELSE].BBptr;
auto iter=std::find(tbb->inEdges.begin(),tbb->inEdges.end(),obb2);
assert(iter!=tbb->inEdges.end());
tbb->inEdges.erase(iter);
tbb->numInEdges--; /* looses 1 arc */
assert(tbb->inEdges.size()==tbb->numInEdges);
tbb->inEdges.erase(iter); /* looses 1 arc */
/* Update icode index */
(*idx) += 5;
}
@ -127,9 +123,7 @@ static void longJCond23 (COND_EXPR *rhs, COND_EXPR *lhs, ICODE * pIcode,
/* Modify in edges of target basic block */
auto iter=std::find(tbb->inEdges.begin(),tbb->inEdges.end(),obb2);
assert(iter!=tbb->inEdges.end());
tbb->inEdges.erase(iter);
tbb->numInEdges--; /* looses 1 arc */
assert(tbb->inEdges.size()==tbb->numInEdges);
tbb->inEdges.erase(iter); /* looses 1 arc */
/* Modify in edges of the ELSE basic block */
tbb = obb2->edges[ELSE].BBptr;
@ -140,9 +134,7 @@ static void longJCond23 (COND_EXPR *rhs, COND_EXPR *lhs, ICODE * pIcode,
}
);
tbb->inEdges.erase(newlast,tbb->inEdges.end());
tbb->numInEdges--; /* looses 2 arcs, gains 1 arc */
tbb->inEdges.push_back(pbb);
assert(tbb->inEdges.size()==tbb->numInEdges);
tbb->inEdges.push_back(pbb); /* looses 2 arcs, gains 1 arc */
/* Modify out edge of header basic block */
pbb->edges[ELSE].BBptr = tbb;
@ -154,7 +146,7 @@ static void longJCond23 (COND_EXPR *rhs, COND_EXPR *lhs, ICODE * pIcode,
/* Create new HLI_JCOND and condition */
lhs = COND_EXPR::boolOp (lhs, rhs, condOpJCond[(pIcode+off+1)->ic.ll.opcode-iJB]);
(pIcode+1)->setJCond(lhs);
copyDU (pIcode+1, pIcode, eUSE, eUSE);
(pIcode+1)->copyDU(*pIcode, eUSE, eUSE);
(pIcode+1)->du.use |= (pIcode+off)->du.use;
/* Update statistics */
@ -181,7 +173,7 @@ static void longJCond22 (COND_EXPR *rhs, COND_EXPR *lhs, ICODE * pIcode,
/* Form conditional expression */
lhs = COND_EXPR::boolOp (lhs, rhs, condOpJCond[(pIcode+3)->ic.ll.opcode - iJB]);
(pIcode+1)->setJCond(lhs);
copyDU (pIcode+1, pIcode, eUSE, eUSE);
(pIcode+1)->copyDU (*pIcode, eUSE, eUSE);
(pIcode+1)->du.use |= (pIcode+2)->du.use;
/* Adjust outEdges[0] to the new target basic block */
@ -200,11 +192,8 @@ static void longJCond22 (COND_EXPR *rhs, COND_EXPR *lhs, ICODE * pIcode,
assert(iter!=tbb->inEdges.end());
tbb->inEdges.erase(iter);
if ((pIcode+3)->ic.ll.opcode == iJE)
tbb->numInEdges--; /* looses 1 arc */
else /* iJNE => replace arc */
tbb->inEdges.push_back(pbb);
assert(tbb->inEdges.size()==tbb->numInEdges);
if ((pIcode+3)->ic.ll.opcode != iJE)
tbb->inEdges.push_back(pbb); /* iJNE => replace arc */
/* Modify ELSE out edge of header basic block */
tbb = obb1->edges[ELSE].BBptr;
@ -215,9 +204,8 @@ static void longJCond22 (COND_EXPR *rhs, COND_EXPR *lhs, ICODE * pIcode,
tbb->inEdges.erase(iter);
if ((pIcode+3)->ic.ll.opcode == iJE) /* replace */
tbb->inEdges.push_back(pbb);
else
tbb->numInEdges--; /* iJNE => looses 1 arc */
assert(tbb->inEdges.size()==tbb->numInEdges);
// else
// tbb->numInEdges--; /* iJNE => looses 1 arc */
/* Update statistics */
@ -493,7 +481,7 @@ static void propLongReg (Int i, ID *pLocId, Function * pProc)
lhs = COND_EXPR::boolOp (lhs, rhs,
condOpJCond[(pIcode+1)->ic.ll.opcode - iJB]);
(pIcode+1)->setJCond(lhs);
copyDU (pIcode+1, pIcode, eUSE, eUSE);
(pIcode+1)->copyDU(*pIcode, eUSE, eUSE);
pIcode->invalidate();
}
}

23
src/reducible.cpp
View File

@ -87,7 +87,7 @@ static void appendNodeInt (queue &pqH, BB *node, interval *pI)
auto found_iter=std::find(pqH.begin(),pqH.end(),node);
if(found_iter!=pqH.end())
{
pI->numOutEdges -= (byte)(*found_iter)->numInEdges - 1;
pI->numOutEdges -= (byte)(*found_iter)->inEdges.size() - 1;
pqH.erase(found_iter);
}
}
@ -99,7 +99,7 @@ static void appendNodeInt (queue &pqH, BB *node, interval *pI)
/* Finds the intervals of graph derivedGi->Gi and places them in the list
* of intervals derivedGi->Ii.
* Algorithm by M.S.Hecht. */
void derSeq_Entry::findIntervals ()
void derSeq_Entry::findIntervals (Function *c)
{
interval *pI, /* Interval being processed */
*J; /* ^ last interval in derivedGi->Ii */
@ -112,7 +112,7 @@ void derSeq_Entry::findIntervals ()
appendQueue (H, Gi); /* H = {first node of G} */
Gi->beenOnH = TRUE;
Gi->reachingInt = BB::Create(); /* ^ empty BB */
Gi->reachingInt = BB::Create(0,"",c); /* ^ empty BB */
/* Process header nodes list H */
while (!H.empty())
@ -185,10 +185,9 @@ static void displayIntervals (interval *pI)
while (nodePtr!=pI->nodes.end())
{
if ((*nodePtr)->correspInt == NULL) /* real BBs */
printf (" Node: %ld\n", (*nodePtr)->start);
printf (" Node: %ld\n", (*nodePtr)->begin());
else /* BBs represent intervals */
printf (" Node (corresp int): %d\n",
(*nodePtr)->correspInt->numInt);
printf (" Node (corresp int): %d\n", (*nodePtr)->correspInt->numInt);
++nodePtr;
}
pI = pI->next;
@ -240,7 +239,7 @@ derSeq_Entry::~derSeq_Entry()
/* Finds the next order graph of derivedGi->Gi according to its intervals
* (derivedGi->Ii), and places it in derivedGi->next->Gi. */
static boolT nextOrderGraph (derSeq *derivedGi)
bool Function::nextOrderGraph (derSeq *derivedGi)
{
interval *Ii; /* Interval being processed */
BB *BBnode, /* New basic block of intervals */
@ -263,7 +262,7 @@ static boolT nextOrderGraph (derSeq *derivedGi)
while (Ii)
{
i = 0;
bbs.push_back(BB::Create(-1, -1, INTERVAL_NODE, Ii->numOutEdges, NULL));
bbs.push_back(BB::Create(-1, -1, INTERVAL_NODE, Ii->numOutEdges, this));
BBnode = bbs.back();
BBnode->correspInt = Ii;
const queue &listIi(Ii->nodes);
@ -307,7 +306,7 @@ static boolT nextOrderGraph (derSeq *derivedGi)
if(iter==bbs.end())
fatalError (INVALID_INT_BB);
edge.BBptr = *iter;
(*iter)->numInEdges++;
(*iter)->inEdges.push_back(0);
(*iter)->inEdgeCount++;
}
}
@ -319,7 +318,7 @@ static boolT nextOrderGraph (derSeq *derivedGi)
/* Finds the derived sequence of the graph derivedG->Gi (ie. cfg).
* Constructs the n-th order graph and places all the intermediate graphs
* in the derivedG list sequence. */
static byte findDerivedSeq (derSeq *derivedGi)
byte Function::findDerivedSeq (derSeq *derivedGi)
{
BB *Gi; /* Current derived sequence graph */
@ -328,7 +327,7 @@ static byte findDerivedSeq (derSeq *derivedGi)
while (! trivialGraph (Gi))
{
/* Find the intervals of Gi and place them in derivedGi->Ii */
iter->findIntervals ();
iter->findIntervals(this);
/* Create Gi+1 and check if it is equivalent to Gi */
if (! nextOrderGraph (derivedGi))
@ -346,7 +345,7 @@ static byte findDerivedSeq (derSeq *derivedGi)
// derivedGi->next = NULL;
return FALSE;
}
derivedGi->back().findIntervals ();
derivedGi->back().findIntervals (this);
return TRUE;
}

12
src/scanner.cpp
View File

@ -126,8 +126,8 @@ static struct {
{ none1, none2, OP386 , iZERO , 0 , }, /* 67 */
{ data2, none2, NO_SRC , iPUSH , 0 , }, /* 68 */
{ modrm, data2, TO_REG | NSP , iIMUL , Sf | Zf | Cf, }, /* 69 */
{ data1, none2, S | NO_SRC , iPUSH , 0 , }, /* 6A */
{ modrm, data1, TO_REG | NSP | S , iIMUL , Sf | Zf | Cf, }, /* 6B */
{ data1, none2, S_EXT | NO_SRC , iPUSH , 0 , }, /* 6A */
{ modrm, data1, TO_REG | NSP | S_EXT , iIMUL , Sf | Zf | Cf, }, /* 6B */
{ strop, memImp, NOT_HLL | B|IM_OPS , iINS , 0 , Df }, /* 6C */
{ strop, memImp, NOT_HLL | IM_OPS , iINS , 0 , Df }, /* 6D */
{ strop, memImp, NOT_HLL | B|IM_OPS , iOUTS , 0 , Df }, /* 6E */
@ -151,7 +151,7 @@ static struct {
{ immed, data1, B , iZERO , 0 , }, /* 80 */
{ immed, data2, NSP , iZERO , 0 , }, /* 81 */
{ immed, data1, B , iZERO , 0 , }, /* 82 */ /* ?? */
{ immed, data1, NSP | S , iZERO , 0 , }, /* 83 */
{ immed, data1, NSP | S_EXT , iZERO , 0 , }, /* 83 */
{ modrm, none2, TO_REG | B , iTEST , Sf | Zf | Cf, }, /* 84 */
{ modrm, none2, TO_REG | NSP , iTEST , Sf | Zf | Cf, }, /* 85 */
{ modrm, none2, TO_REG | B , iXCHG , 0 , }, /* 86 */
@ -172,8 +172,8 @@ static struct {
{ regop, axImp, 0 , iXCHG , 0 , }, /* 95 */
{ regop, axImp, 0 , iXCHG , 0 , }, /* 96 */
{ regop, axImp, 0 , iXCHG , 0 , }, /* 97 */
{ alImp, axImp, SRC_B | S , iSIGNEX,0 , }, /* 98 */
{axSrcIm, axImp, IM_DST | S , iSIGNEX,0 , }, /* 99 */
{ alImp, axImp, SRC_B | S_EXT , iSIGNEX,0 , }, /* 98 */
{axSrcIm, axImp, IM_DST | S_EXT , iSIGNEX,0 , }, /* 99 */
{ dispF, none2, 0 , iCALLF ,0 , }, /* 9A */
{ none1, none2, FLOAT_OP| NO_OPS , iWAIT , 0 , }, /* 9B */
{ none1, none2, NOT_HLL | NO_OPS , iPUSHF, 0 , }, /* 9C */
@ -658,7 +658,7 @@ static void arith(Int i)
*****************************************************************************/
static void data1(Int i)
{
pIcode->ic.ll.immed.op = (stateTable[i].flg & S)? signex(*pInst++):
pIcode->ic.ll.immed.op = (stateTable[i].flg & S_EXT)? signex(*pInst++):
*pInst++;
pIcode->ic.ll.flg |= I;
}

156
src/udm.cpp
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@ -15,6 +15,54 @@ static void displayDfs(BB * pBB);
/****************************************************************************
* udm
****************************************************************************/
void Function::buildCFG()
{
if(flg & PROC_ISLIB)
return; /* Ignore library functions */
createCFG();
if (option.VeryVerbose)
displayCFG();
/* Remove redundancies and add in-edge information */
compressCFG();
/* Print 2nd pass assembler listing */
if (option.asm2)
disassem(2, this);
/* Idiom analysis and propagation of long type */
lowLevelAnalysis();
/* Generate HIGH_LEVEL icodes whenever possible */
highLevelGen();
}
void Function::controlFlowAnalysis()
{
if (flg & PROC_ISLIB)
return; /* Ignore library functions */
derSeq *derivedG=0;
/* Make cfg reducible and build derived sequences */
derivedG=checkReducibility();
if (option.VeryVerbose)
derivedG->display();
/* Structure the graph */
structure(derivedG);
/* Check for compound conditions */
compoundCond ();
if (option.verbose)
{
printf("\nDepth first traversal - Proc %s\n", name);
cfg.front()->displayDfs();
}
/* Free storage occupied by this procedure */
freeDerivedSeq(*derivedG);
}
void udm(void)
{
@ -22,73 +70,21 @@ void udm(void)
* icodes to high-level ones */
for (auto iter = pProcList.rbegin(); iter!=pProcList.rend(); ++iter)
{
if (iter->flg & PROC_ISLIB)
continue; /* Ignore library functions */
/* Create the basic control flow graph */
iter->createCFG();
if (option.VeryVerbose)
iter->displayCFG();
/* Remove redundancies and add in-edge information */
iter->compressCFG();
/* Print 2nd pass assembler listing */
if (option.asm2)
disassem(2, &(*iter));
/* Idiom analysis and propagation of long type */
iter->lowLevelAnalysis();
/* Generate HIGH_LEVEL icodes whenever possible */
iter->highLevelGen();
iter->buildCFG();
}
/* Data flow analysis - eliminate condition codes, extraneous registers
* and intermediate instructions. Find expressions by forward
* substitution algorithm */
pProcList.front().dataFlow (0);
derSeq *derivedG=0;
/* Control flow analysis - structuring algorithm */
for (auto iter = pProcList.rbegin(); iter!=pProcList.rend(); ++iter)
{
if (iter->flg & PROC_ISLIB)
continue; /* Ignore library functions */
/* Make cfg reducible and build derived sequences */
derivedG=iter->checkReducibility();
if (option.VeryVerbose)
derivedG->display();
/* Structure the graph */
iter->structure(derivedG);
/* Check for compound conditions */
iter->compoundCond ();
if (option.verbose) {
printf("\nDepth first traversal - Proc %s\n", iter->name);
iter->cfg.front()->displayDfs();
}
/* Free storage occupied by this procedure */
freeDerivedSeq(*derivedG);
iter->controlFlowAnalysis();
}
}
static const char *const s_nodeType[] = {"branch", "if", "case", "fall", "return", "call",
"loop", "repeat", "interval", "cycleHead",
"caseHead", "terminate",
"nowhere" };
static const char *const s_loopType[] = {"noLoop", "while", "repeat", "loop", "for"};
/****************************************************************************
* displayCFG - Displays the Basic Block list
***************************************************************************/
@ -102,58 +98,8 @@ void Function::displayCFG()
for (auto iter = cfg.begin(); iter!=cfg.end(); ++iter)
{
pBB = *iter;
printf("\nnode type = %s, ", s_nodeType[pBB->nodeType]);
printf("start = %ld, length = %ld, #out edges = %ld\n",
pBB->start, pBB->length, pBB->numOutEdges);
for (i = 0; i < pBB->numOutEdges; i++)
printf(" outEdge[%2d] = %ld\n",i, pBB->edges[i].BBptr->start);
(*iter)->display();
}
}
/*****************************************************************************
* displayDfs - Displays the CFG using a depth first traversal
****************************************************************************/
void BB::displayDfs()
{
Int i;
assert(this);
traversed = DFS_DISP;
printf("node type = %s, ", s_nodeType[nodeType]);
printf("start = %ld, length = %ld, #in-edges = %ld, #out-edges = %ld\n",
start, length, inEdges.size(), numOutEdges);
printf("dfsFirst = %ld, dfsLast = %ld, immed dom = %ld\n",
dfsFirstNum, dfsLastNum,
immedDom == MAX ? -1 : immedDom);
printf("loopType = %s, loopHead = %ld, latchNode = %ld, follow = %ld\n",
s_loopType[loopType],
loopHead == MAX ? -1 : loopHead,
latchNode == MAX ? -1 : latchNode,
loopFollow == MAX ? -1 : loopFollow);
printf ("ifFollow = %ld, caseHead = %ld, caseTail = %ld\n",
ifFollow == MAX ? -1 : ifFollow,
caseHead == MAX ? -1 : caseHead,
caseTail == MAX ? -1 : caseTail);
if (nodeType == INTERVAL_NODE)
printf("corresponding interval = %ld\n", correspInt->numInt);
else
for (i = 0; i < inEdges.size(); i++)
printf (" inEdge[%ld] = %ld\n", i, inEdges[i]->start);
/* Display out edges information */
for (i = 0; i < numOutEdges; i++)
if (nodeType == INTERVAL_NODE)
printf(" outEdge[%ld] = %ld\n", i,
edges[i].BBptr->correspInt->numInt);
else
printf(" outEdge[%d] = %ld\n", i, edges[i].BBptr->start);
printf("----\n");
/* Recursive call on successors of current node */
for (i = 0; i < numOutEdges; i++)
if (edges[i].BBptr->traversed != DFS_DISP)
edges[i].BBptr->displayDfs();
}

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tests/outputs/BENCHLNG.b
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@ -6,7 +6,7 @@
#include "dcc.h"
long LMOD@ (long arg0, int arg2int arg3)
long LMOD@ (long arg0, int arg2, int arg3)
/* Takes 8 bytes of parameters.
* Runtime support routine of the compiler.
* Untranslatable routine. Assembler provided.

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@ -6,7 +6,7 @@
#include "dcc.h"
long LMOD@ (long arg0, int arg2int arg3)
long LMOD@ (long arg0, int arg2, int arg3)
/* Takes 8 bytes of parameters.
* Runtime support routine of the compiler.
* Untranslatable routine. Assembler provided.

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