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the mid-level optimizer removes this stuff.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47108 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-02-14 05:43:18 +00:00
parent 48b4d96949
commit ea1cddf546
1 changed files with 0 additions and 26 deletions
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26
lib/Target/X86/README-MMX.txt
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@ -41,29 +41,3 @@ _qux:
addl $12, %esp
ret $4
//===---------------------------------------------------------------------===//
int main() {
__m64 A[1] = { _mm_cvtsi32_si64(1) };
__m64 B[1] = { _mm_cvtsi32_si64(10) };
__m64 sum = _mm_cvtsi32_si64(0);
sum = __builtin_ia32_paddq(__builtin_ia32_paddq(A[0], B[0]), sum);
printf("Sum = %d\n", _mm_cvtsi64_si32(sum));
return 0;
}
Generates:
movl $11, %eax
### movd %eax, %mm0
### movq %mm0, 8(%esp)
### movl 8(%esp), %eax
movl %eax, 4(%esp)
movl $_str, (%esp)
call L_printf$stub
xorl %eax, %eax
addl $28, %esp
These instructions are unnecessary.