http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47780
Summary: -fcompare-debug failure with -O -fgcse -fgcse-las
-fstack-protector-all
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: zso...@seznam.cz
CC: aol...@gcc.gnu.org
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 23377
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23377
reduced testcase
Compiler output:
$ gcc -O -fgcse -fgcse-las -fstack-protector-all -fno-tree-ccp
-fno-tree-dominator-opts -fcompare-debug testcase.c
testcase.c: In function 'foo':
testcase.c:3:6: note: The ABI for passing parameters with 128-byte alignment
has changed in GCC 4.6
gcc: error: testcase.c: -fcompare-debug failure (length)
Generated code is different with/without -g.
Tested revisions:
r170243 - fail
4.5 r170013 - fail
