https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96426
Bug ID: 96426
Summary: __builtin_convertvector ICE without lhs
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: glisse at gcc dot gnu.org
Target Milestone: ---
typedef long long veci __attribute__((vector_size(16)));
typedef double vecf __attribute__((vector_size(16)));
void f(veci v){
__builtin_convertvector(v,vecf);
}
$ gcc u.c
during GIMPLE pass: veclower
u.c: In function 'f':
u.c:3:6: internal compiler error: Segmentation fault
3 | void f(veci v){
| ^
Found by inspection, I wanted to introduce another conversion-like IFN (not
pure) and didn't know where to store the result type in case the lhs is
missing. Here the easiest would be to skip the stmt if there is no lhs, even if
that's not perfect for -O0, but I am also interested in how to handle the
non-pure case, if you have ideas...
