https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112107
--- Comment #2 from Sergei Trofimovich <slyfox at gcc dot gnu.org> ---
Reduced ira-build.cc down to the following:
// $ cat pp.cc.cc
typedef struct ira_object *ira_object_t;
struct ira_object {
void *conflicts_array;
int min, max;
};
void *ira_allocate(int);
int ira_conflict_vector_profitable_p_nbytes;
void ira_conflict_vector_profitable_p(ira_object_t obj) {
int max(obj->max);
if (max < obj->min)
ira_conflict_vector_profitable_p_nbytes = max - obj->min;
}
void ira_allocate_object_conflicts(ira_object_t obj) {
ira_conflict_vector_profitable_p(obj);
int size((obj->max - obj->min) * sizeof 0);
obj->conflicts_array = ira_allocate(size);
}
Reproducer:
# cat trigger.bash
#!/usr/bin/env bash
f() {
stage3-gcc/xg++ -Bstage3-gcc -nostdinc++ -fno-PIE -g -O2 -fchecking=1
-DIN_GCC -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -fno-PIE -c
pp.cc.cc -o pp.o -Wall "$@"
strip --strip-debug pp.o
sha1sum pp.o
}
[[ "$(f)" == "$(f -gtoggle)" ]] && echo EQUAL || echo DIFF
Running:
$ ./trigger.bash
DIFF
