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re PR rtl-optimization/79286 (ira and lra wrong code at -O2 and -Os on i686-linux) 

PR rtl-optimizatoin/79286
	* ira.c (update_equiv_regs): Drop may_trap_p exception to
	dominance test.

From-SVN: r245714
This commit is contained in:
Jeff Law 2017-02-24 08:36:10 -07:00 committed by Jeff Law
parent d081521703
commit 19e1183f17
2 changed files with 7 additions and 2 deletions
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gcc/ChangeLog
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@ -1,3 +1,9 @@
2017-02-24 Jeff Law <law@redhat.com>
PR rtl-optimizatoin/79286
* ira.c (update_equiv_regs): Drop may_trap_p exception to
dominance test.
2017-02-24 Richard Biener <rguenther@suse.de>
PR tree-optimization/79389

3
gcc/ira.c
View File

@ -3551,8 +3551,7 @@ update_equiv_regs (void)
if (DF_REG_DEF_COUNT (regno) == 1
&& note
&& !rtx_varies_p (XEXP (note, 0), 0)
&& (!may_trap_p (XEXP (note, 0))
|| def_dominates_uses (regno)))
&& def_dominates_uses (regno))
{
rtx note_value = XEXP (note, 0);
remove_note (insn, note);