http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46522
Summary: ICE: in reset_sched_cycles_in_current_ebb, at
sel-sched.c:7092 with -O3 -fsel-sched-pipelining
-fselective-scheduling2 -funroll-loops
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: zso...@seznam.cz
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 22432
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22432
reduced testcase (originally PR45352 comment #19)
I am sorry for the amount of compiler flags, removing any of them causes the
ICE to disappear. Even manual partial inlining, unrolling, loop unswitching,
... either removes the ICE or doesn't allow me to remove further flags.
Flags are either:
-O3 -fkeep-inline-functions -fsel-sched-pipelining -fselective-scheduling2
-funroll-loops
or
-O2 -fkeep-inline-functions -fsel-sched-pipelining -fselective-scheduling2
-funroll-loops -funswitch-loops
or
-O1 -fcse-follow-jumps -fkeep-inline-functions -fpartial-inlining
-freorder-blocks -frerun-cse-after-loop -fschedule-insns2
-fsel-sched-pipelining -fselective-scheduling2 -funroll-loops -funswitch-loops
Compiler output:
$ gcc -O3 -fkeep-inline-functions -fsel-sched-pipelining
-fselective-scheduling2 -funroll-loops pr46522.c
pr46522.c: In function 'foo2':
pr46522.c:30:1: internal compiler error: in reset_sched_cycles_in_current_ebb,
at sel-sched.c:7092
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Tested revisions (for the -O1 case):
r166795 - crash
r165699 - OK
4.5 - doesn't know -fpartial-inlining
