https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81744
Bug ID: 81744
Summary: ICE: verify_ssa failed, at tree-ssa.c:1186
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: jamrial at gmail dot com
Target Milestone: ---
Created attachment 41942
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41942&action=edit
Preprocessed output created with -freport-bug
[jamrial@ArchVM ~]$ gcc -fno-math-errno -O3 -c ccV0zFt3.i
src/libavfilter/af_compand.c: In function ‘config_output’:
src/libavfilter/af_compand.c:328:12: error: definition in block 78 follows the
use
for SSA_NAME: _519 in statement:
_126 = _519 + 4294967291;
during GIMPLE pass: pcom
src/libavfilter/af_compand.c:328:12: internal compiler error: verify_ssa failed
0xdb534b verify_ssa(bool, bool)
/home/jamrial/gcc-svn/gcc/tree-ssa.c:1186
0xa99527 execute_function_todo
/home/jamrial/gcc-svn/gcc/passes.c:1997
0xa9a442 execute_todo
/home/jamrial/gcc-svn/gcc/passes.c:2044
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
[jamrial@ArchVM ~]$ gcc -fno-math-errno -fno-tree-vectorize -O3 -c ccV0zFt3.i
src/libavfilter/af_compand.c: In function ‘config_output’:
src/libavfilter/af_compand.c:328:12: error: definition in block 83 follows the
use
for SSA_NAME: _618 in statement:
_611 = _618 + 4294967291;
during GIMPLE pass: pcom
src/libavfilter/af_compand.c:328:12: internal compiler error: verify_ssa failed
0xdb534b verify_ssa(bool, bool)
/home/jamrial/gcc-svn/gcc/tree-ssa.c:1186
0xa99527 execute_function_todo
/home/jamrial/gcc-svn/gcc/passes.c:1997
0xa9a442 execute_todo
/home/jamrial/gcc-svn/gcc/passes.c:2044
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Doesn't crash if i remove either -fno-math-errno or -O3. Adding
-fno-tree-vectorize only changes the contents of the SSA_NAME error.
This seems to be a regression introduced sometime during the past week.
