https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91188
Bug ID: 91188
Summary: strict_low_part operations do not work
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: ubizjak at gmail dot com
Target Milestone: ---
Following test case:
--cut here--
struct S1
{
unsigned char val;
unsigned char pad1;
unsigned short pad2;
};
struct S1
__attribute__((noinline))
test_andb (struct S1 a, unsigned char b)
{
a.val &= b;
return a;
}
--cut here--
compiles on x86_64 with -O2 to:
test_andb:
movl %edi, %eax # 2 [c=4 l=2] *movsi_internal/0
andl %edi, %esi # 21 [c=4 l=2] *andsi_1/0
movb %sil, %al # 9 [c=4 l=3] *movstrictqi_1/0
ret # 24 [c=0 l=1] simple_return_internal
Expected code:
test_andb:
movl %edi, %eax
andb %sil, %al
ret
