https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94934
Bug ID: 94934
Summary: Failure to inline addv
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: gabravier at gmail dot com
Target Milestone: ---
int f(int x, int y)
{
return x + y;
}
With -O3 -ftrapv, LLVM outputs this :
f(int, int): # @f(int, int)
mov eax, edi
add eax, esi
jo .LBB0_1
ret
.LBB0_1:
ud2
GCC outputs this :
f(int, int):
sub rsp, 8
call __addvsi3
add rsp, 8
ret
`-ftrapv` may not be specifically intended for speed, but it seems to make
sense to inline it on targets that have direct support for the instructions it
uses.
