[Bug tree-optimization/33673] New: ICE in verify_flow_info, missing barrier, when multiple tree opts disabled
janis at gcc dot gnu dot org
gcc-bugzilla@gcc.gnu.org
Sat Oct 6 01:21:00 GMT 2007
Benchmark 176.gcc from SPEC CPU2000 fails with an ICE in verify_flow_info and a
message about a missing barrier when compiled on powerpc-linux with "-Os
-fno-forward-propagate -fno-guess-branch-probability -fno-move-loop-invariants
-fno-tree-dominator-opts -fno-tree-loop-optimize". It's an odd set of options
but the failure probably demonstrates some sort of dependency between the
optimizations. All of the options are documented, none as experimental.
A minimized test case (I'll attach it) fails with these options for a cross cc1
for any of power*-*-*, s390*-linux, cris-elf, frv-elf, or m32c-elf with the
output:
bug11.c: In function Âfind_regÂ:
bug11.c:32: error: missing barrier after block 4
bug11.c:32: internal compiler error: verify_flow_info failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
The failure starts with this patch:
http://gcc.gnu.org/viewcvs?view=rev&rev=124786
r124786 | rakdver | 2007-05-17 08:10:24 +0000 (Thu, 17 May 2007)
--
Summary: ICE in verify_flow_info, missing barrier, when multiple
tree opts disabled
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: janis at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33673
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