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Made to work with troff

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ceriel
1990-06-20 10:05:22 +00:00
parent 955002df6c
commit d3a17633aa
25 changed files with 583 additions and 456 deletions
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doc/ego/cj/cj1
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@@ -27,16 +27,18 @@ else
S3
(pseudo) EM:
TEST COND TEST COND
BNE *1 BNE *1
S1 S1
S3 ---> BRA *2
BRA *2 1:
1: S2
S2 2:
S3 S3
.TS
l l l.
TEST COND TEST COND
BNE *1 BNE *1
S1 S1
S3 ---> BRA *2
BRA *2 1:
1: S2
S2 2:
S3 S3
2:
.TE
Fig. 9.1 An example of Cross Jumping
.DE
@@ -54,20 +56,23 @@ as demonstrated by the Fig. 8.2.
.DS
Pascal:
if cond then
x := f(4)
else
x := g(5)
if cond then
x := f(4)
else
x := g(5)
EM:
EM:
... ...
LOC 4 LOC 5
CAL F CAL G
ASP 2 ASP 2
LFR 2 LFR 2
STL X STL X
.TS
l l.
... ...
LOC 4 LOC 5
CAL F CAL G
ASP 2 ASP 2
LFR 2 LFR 2
STL X STL X
.TE
Fig. 9.2 Effectiveness of Cross Jumping
.DE
@@ -92,37 +97,40 @@ blocks must be split into two.
The control flow graphs before and after the optimization are shown
in Fig. 9.3 and Fig. 9.4.
.DS
.ft 5
-------- --------
| | | |
| S1 | | S2 |
| S3 | | S3 |
| | | |
-------- --------
| |
|------------------|--------------------|
|
v
-------- --------
| | | |
| S1 | | S2 |
| S3 | | S3 |
| | | |
-------- --------
| |
|------------------|--------------------|
|
v
.ft R
Fig. 9.3 CFG before optimization
.DE
.DS
-------- --------
| | | |
| S1 | | S2 |
| | | |
-------- --------
| |
|--------------------<------------------|
v
--------
| |
| S3 |
| |
--------
|
v
.ft 5
-------- --------
| | | |
| S1 | | S2 |
| | | |
-------- --------
| |
|--------------------<------------------|
v
--------
| |
| S3 |
| |
--------
|
v
.ft R
Fig. 9.4 CFG after optimization
.DE