https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113395
Bug ID: 113395
Summary: RTL expansion drops MEM_EXPR
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: rguenth at gcc dot gnu.org
Target Milestone: ---
struct S {
signed m : 7;
signed e : 2;
} g;
void
k()
{
g.e ^= 1;
}
expands as
(insn 8 7 0 (parallel [
(set (mem/j/c:HI (reg/f:DI 100) [0 +0 S2 A32])
(xor:HI (mem/j/c:HI (reg/f:DI 100) [0 +0 S2 A32])
(reg:HI 101)))
(clobber (reg:CC 17 flags))
]) "t.c":9:7 -1
(nil))
similar g.e = 1;
(insn 9 8 10 (set (reg:HI 102)
(mem/j/c:HI (reg/f:DI 101) [0 +0 S2 A32])) "t.c":9:7 -1
(nil))
...
(insn 12 11 0 (set (mem/j/c:HI (reg/f:DI 101) [0 +0 S2 A32])
(reg:HI 104)) "t.c":9:7 -1
(nil))
