http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47881
Summary: [4.6 Regression] -fcompare-debug failure (length) with
-O -fno-dce -funroll-loops -fno-web
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: i686-pc-linux-gnu
Target: i686-pc-linux-gnu
Created attachment 23452
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23452
reduced testcase
Compiler output:
$ gcc -O -fcompare-debug -fno-dce -funroll-loops -fno-web testcase.c -m32
gcc: error: testcase.c: -fcompare-debug failure (length)
$ diff testcase.*gkd
943c943
< (insn# 0 0 39 (set (reg:SI 4 si)
---
> (insn# 0 0 39 (set (reg:SI 5 di)
947,948c947,948
< (set (reg:SI 4 si)
< (plus:SI (reg:SI 4 si)
---
> (set (reg:SI 5 di)
> (plus:SI (reg:SI 5 di)
...
Tested revisions:
r170450 - fail
4.5 r170013 - OK
4.5.2 - OK
