http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48772
Summary: [4.7 Regression] ICE: SIGSEGV in
walk_non_aliased_vuses (gimple.h:1100) with -O
-fnon-call-exceptions -fno-tree-ccp -fno-tree-dce
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: zso...@seznam.cz
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 24103
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24103
reduced testcase (from g++.dg/torture/pr44535.C)
Compiler output:
$ gcc -O -fnon-call-exceptions -fno-tree-ccp -fno-tree-dce testcase.C
==25341== Invalid read of size 1
==25341== at 0xB0BE03: walk_non_aliased_vuses (gimple.h:1100)
==25341== by 0xB80E8C: vn_reference_lookup (tree-ssa-sccvn.c:1697)
==25341== by 0xB6DD99: eliminate (tree-ssa-pre.c:4341)
==25341== by 0xB7103D: execute_pre (tree-ssa-pre.c:4921)
==25341== by 0x984C55: execute_one_pass (passes.c:1555)
==25341== by 0x984F34: execute_pass_list (passes.c:1610)
==25341== by 0x984F46: execute_pass_list (passes.c:1611)
==25341== by 0xACCBAA: tree_rest_of_compilation (tree-optimize.c:423)
==25341== by 0xCAFB42: cgraph_expand_function (cgraphunit.c:1576)
==25341== by 0xCB205B: cgraph_optimize (cgraphunit.c:1635)
==25341== by 0xCB25E9: cgraph_finalize_compilation_unit (cgraphunit.c:1096)
==25341== by 0x5BD42D: cp_write_global_declarations (decl2.c:4002)
==25341== by 0xA71A87: toplev_main (toplev.c:591)
==25341== by 0x644AB6C: (below main) (in /lib64/libc-2.11.3.so)
==25341== Address 0x0 is not stack'd, malloc'd or (recently) free'd
==25341==
testcase.C: In function 'int main()':
testcase.C:26:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
