http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47994
Summary: -fcompare-debug failure with -O2 -fpeel-loops
-fno-rerun-cse-after-loop -fno-tree-loop-optimize
-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: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 23548
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23548
reduced testcase
Compiler output:
$ gcc -O2 -fpeel-loops -fno-rerun-cse-after-loop -fno-tree-loop-optimize
-fno-web -fcompare-debug testcase.c
gcc: error: testcase.c: -fcompare-debug failure (length)
$ diff testcase.*gkd
34a35
> (note# 0 0 NOTE_INSN_DELETED)
37,44d37
< (plus:SI (reg/v:SI 5 di [orig:64 j ] [64])
< (const_int 1 [0x1])))
< (clobber (reg:CC 17 flags))
< ]) testcase.c:8# {*addsi_1}
< (expr_list:REG_UNUSED (reg:CC 17 flags)
< (nil)))
< (insn# 0 0 2 (parallel [
< (set (reg:SI 5 di [orig:62 prephitmp.5 ] [62])
54c47
< (const_int 80 [0x50])))
---
> (const_int 81 [0x51])))
Tested revisions:
r170674 - fail
4.5 r170013 - fail
