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[Bug rtl-optimization/49847] [4.8 Regression] NULL deref in fold_rtx (prev_insn_cc0 == NULL)
- From: "law at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 18 Dec 2015 17:17:46 +0000
- Subject: [Bug rtl-optimization/49847] [4.8 Regression] NULL deref in fold_rtx (prev_insn_cc0 == NULL)
- Auto-submitted: auto-generated
- References: <bug-49847-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49847
--- Comment #40 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Fri Dec 18 17:17:14 2015
New Revision: 231821
URL: https://gcc.gnu.org/viewcvs?rev=231821&root=gcc&view=rev
Log:
[PATCH] [PR rtl-optimization/49847] Fix ICE in CSE due to cc0-setter and
cc0-user in different blocks
PR rtl-optimization/49847
* cse.c (record_jump_equiv): Handle fold_rtx returning NULL_RTX.
PR rtl-optimization/49847
* g++.dg/pr49847-2.C: New test.
Added:
trunk/gcc/testsuite/g++.dg/pr49847-2.C
Modified:
trunk/gcc/ChangeLog
trunk/gcc/cse.c
trunk/gcc/testsuite/ChangeLog