http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46288
Summary: ICE: SIGSEGV in walk_gimple_op (gimple.c:2857) with -O
-fno-tree-dce and __builtin_expect()
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: zso...@seznam.cz
----- testcase.c -----
void foo (int i)
{
__builtin_expect (i, i);
}
----------------------
Valgrind output (4.6 and 4.5):
$ gcc -O -fno-tree-dce testcase.c
==12204== Invalid read of size 8
==12204== at 0x6E6CF6: walk_gimple_op (gimple.c:2857)
==12204== by 0x89C342: verify_stmts (tree-cfg.c:4143)
==12204== by 0x9B943C: verify_ssa (tree-ssa.c:878)
==12204== by 0x794CCC: execute_function_todo (passes.c:1248)
==12204== by 0x79536E: execute_todo (passes.c:1277)
==12204== by 0x7979D9: execute_one_pass (passes.c:1583)
==12204== by 0x797C04: execute_pass_list (passes.c:1615)
==12204== by 0x797C16: execute_pass_list (passes.c:1616)
==12204== by 0x8E3FD5: tree_rest_of_compilation (tree-optimize.c:422)
==12204== by 0xAB0C31: cgraph_expand_function (cgraphunit.c:1494)
==12204== by 0xAB31F9: cgraph_optimize (cgraphunit.c:1553)
==12204== by 0xAB3759: cgraph_finalize_compilation_unit (cgraphunit.c:1016)
==12204== Address 0x10 is not stack'd, malloc'd or (recently) free'd
==12204==
testcase.c: In function 'foo':
testcase.c:1:6: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Compiler output (4.4):
$ gcc -O -fno-tree-dce testcase.c
testcase.c: In function 'foo':
testcase.c:1: internal compiler error: in gimple_assign_set_lhs, at
gimple.h:1687
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Tested revisions:
r166218 - crash
4.5 r165781 - crash
4.4 r165781 - different crash
