Testcase that crashes at -O3 -g: struct S { short x; }; typedef struct S __attribute__((__may_alias__)) test;
int f() { int a=10; test *p=(test *)&a; p->x = 1; return a; } int main() { if (f() == 10) __builtin_abort(); return 0; } --------------------- mayalias-2.c:2: internal compiler error: in splice_child_die, at dwarf2out.c:5513 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. -- Summary: [4.0/4.1/4.2 Regression] -O3 -g crashes sometimes when using may_alias and structs Product: gcc Version: 4.2.0 Status: UNCONFIRMED Keywords: ice-on-valid-code Severity: normal Priority: P3 Component: debug AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: pinskia at gcc dot gnu dot org GCC target triplet: i686-pc-linux-gnu http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28834