https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63897
Bug ID: 63897
Summary: [5.0 regression] gcc.dg/torture/vector-2.c fails at on
x86_64-apple-darwin14
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: fxcoudert at gcc dot gnu.org
Created attachment 33987
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33987&action=edit
Assembler generated by "gcc -msse vector-2.c -O1 -m32 -S"
gcc.dg/torture/vector-2.c currently fails on trunk, when compiled with "-msse
vector-2.c -O1 -m32". Here is a minimal reproducer:
----------------------------
#define vector __attribute__((vector_size(16) ))
vector int f0(vector int t)
{
((int*)&t)[0] = 1;
return t;
}
vector int f1(vector int t)
{
((int*)&t)[1] = 1;
return t;
}
int main(void)
{
vector int a = {0, 0, 0, 0};
vector int b = {1, 0, 0, 0};
vector int c = {0, 1, 0, 0};
vector int a0 = f0(a);
if (__builtin_memcmp (&a0, &b, sizeof(a0)))
__builtin_abort ();
a0 = f1(a);
if (__builtin_memcmp (&a0, &c, sizeof(a0)))
__builtin_abort ();
return 0;
}
----------------------------
When compiled with "gcc -msse vector-2.c -O1 -m32", this segfaults at runtime.
The backtrace is:
* thread #1: tid = 0xdc2a68, 0x00001ea9 a.out`main + 81, queue =
'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0xb0)
frame #0: 0x00001ea9 a.out`main + 81
a.out`main + 81:
-> 0x1ea9: movd 0xb0(%eax), %xmm0
0x1eb1: pshufd $-0x1f, %xmm0, %xmm0
0x1eb6: movaps %xmm0, 0x10(%esp)
0x1ebb: subl $0x4, %esp
The assembler generated is attached.
