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Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
23 lines
766 B
Diff
23 lines
766 B
Diff
2011-03-03 Richard Sandiford <richard.sandiford@linaro.org>
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gcc/
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* ee.c (reg_use_p): Handle subregs of promoted vars.
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=== modified file 'gcc/ee.c'
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--- old/gcc/ee.c 2010-12-10 15:33:37 +0000
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+++ new/gcc/ee.c 2011-03-03 17:08:58 +0000
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@@ -209,7 +209,11 @@
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*regno = REGNO (reg);
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- if (paradoxical_subreg_p (use))
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+ /* Non-paradoxical SUBREGs of promoted vars guarantee that the
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+ upper (elided) bits of the inner register have a particular value.
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+ For our purposes, such SUBREGs act as a full reference to the
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+ inner register. */
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+ if (paradoxical_subreg_p (use) || SUBREG_PROMOTED_VAR_P (use))
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*size = GET_MODE_BITSIZE (GET_MODE (reg));
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else
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*size = subreg_lsb (use) + GET_MODE_BITSIZE (GET_MODE (use));
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