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[Bug rtl-optimization/69195] [4.9/5/6 Regression] gcc.dg/torture/pr44913.c FAILs with -O3 -fno-dce -fno-forward-propagate
- From: "amodra at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 10 Mar 2016 10:47:46 +0000
- Subject: [Bug rtl-optimization/69195] [4.9/5/6 Regression] gcc.dg/torture/pr44913.c FAILs with -O3 -fno-dce -fno-forward-propagate
- Auto-submitted: auto-generated
- References: <bug-69195-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69195
--- Comment #19 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Thu Mar 10 10:47:13 2016
New Revision: 234101
URL: https://gcc.gnu.org/viewcvs?rev=234101&root=gcc&view=rev
Log:
PR69195, Reload confused by invalid reg_equiv
Optimizing indirect jumps to direct jumps, and deleting dead insns can
lead to changes in register lifetimes, which in turn can result in bad
reg_equiv info being passed to reload. So do these tasks before
calculating reg_equiv info.
gcc/
PR rtl-optimization/69195
PR rtl-optimization/47992
* ira.c (recorded_label_ref): Delete.
(update_equiv_regs): Return void.
(indirect_jump_optimize): New function.
(ira): Call indirect_jump_optimize and delete_trivially_dead_insns
before regstat_compute_ri. Don't rebuild_jump_labels here.
Delete update_regstat.
gcc/testsuite/
* gcc.dg/pr69195.c: New.
* gcc.dg/pr69238.c: New.
Added:
trunk/gcc/testsuite/gcc.dg/pr69195.c
trunk/gcc/testsuite/gcc.dg/pr69238.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/ira.c
trunk/gcc/testsuite/ChangeLog