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[cse][3/4] Don't overwrite original rtx when folding source of set

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PR target/65932
	PR target/67714
	* cse.c (cse_insn): Pass NULL to fold_rtx when initially
	folding the source of a SET.

From-SVN: r233133
This commit is contained in:
Kyrylo Tkachov 2016-02-04 09:56:13 +00:00 committed by Kyrylo Tkachov
parent 9fec9595fb
commit 625d55afc1
2 changed files with 8 additions and 1 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2016-02-04 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR target/65932
PR target/67714
* cse.c (cse_insn): Pass NULL to fold_rtx when initially
folding the source of a SET.
2016-02-04 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
PR target/65932

2
gcc/cse.c
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@ -4636,7 +4636,7 @@ cse_insn (rtx_insn *insn)
/* Simplify and foldable subexpressions in SRC. Then get the fully-
simplified result, which may not necessarily be valid. */
src_folded = fold_rtx (src, insn);
src_folded = fold_rtx (src, NULL);
#if 0
/* ??? This caused bad code to be generated for the m68k port with -O2.