diff options
| author | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2016-02-11 08:11:52 +0000 |
|---|---|---|
| committer | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2016-02-11 08:11:52 +0000 |
| commit | 45dc511c816a2b00ca3c2b8666eff2e80a82dc91 (patch) | |
| tree | a6de3a8d010410ba2f310ee3377056ba4949dbf9 /gcc/ifcvt.c | |
| parent | 168a134092f84f198f65002b4e0942f9cecee77f (diff) | |
| download | gcc-45dc511c816a2b00ca3c2b8666eff2e80a82dc91.tar.gz | |
2016-02-11 Richard Biener <rguenther@suse.de>
PR rtl-optimization/69291
* ifcvt.c (noce_try_store_flag_constants): Do not allow
subexpressions affected by changing the result.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@233316 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/ifcvt.c')
| -rw-r--r-- | gcc/ifcvt.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/ifcvt.c b/gcc/ifcvt.c index a50e33dc66c..205590938a5 100644 --- a/gcc/ifcvt.c +++ b/gcc/ifcvt.c @@ -1274,7 +1274,10 @@ noce_try_store_flag_constants (struct noce_if_info *if_info) && CONST_INT_P (XEXP (a, 1)) && CONST_INT_P (XEXP (b, 1)) && rtx_equal_p (XEXP (a, 0), XEXP (b, 0)) - && noce_operand_ok (XEXP (a, 0)) + /* Allow expressions that are not using the result or plain + registers where we handle overlap below. */ + && (REG_P (XEXP (a, 0)) + || ! reg_overlap_mentioned_p (if_info->x, XEXP (a, 0))) && if_info->branch_cost >= 2) { common = XEXP (a, 0); |