Package: gcc-4.1
Version: 4.1.1-21
--- begin bug.c ---
typedef long long v2di __attribute__ ((vector_size(16)));
extern long long x(void);
extern long long y(void);
v2di test(void)
{
return (v2di){x(),y()};
}
--- end bug.c ---
When the above is compiled with `gcc -O -msse2 -S bug.c', the following
incorrect code is generated. Both values get loaded into the lower
vector component,while the upper component is zeroed.
--- begin bug.s ---
.file "bug.c"
.text
.globl test
.type test, @function
test:
pushl %ebp
movl %esp, %ebp
subl $24, %esp
call x
movl %eax, -8(%ebp)
movl %edx, -4(%ebp)
call y
movl %eax, -16(%ebp)
movl %edx, -12(%ebp)
movq -16(%ebp), %xmm1
movlps -8(%ebp), %xmm1
movdqa %xmm1, %xmm0
leave
ret
.size test, .-test
.ident "GCC: (GNU) 4.1.2 20061115 (prerelease) (Debian
4.1.1-21)"
.section .note.GNU-stack,"",@progbits
--- end bug.s ---
Regards,
Geoff.
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