https://llvm.org/bugs/show_bug.cgi?id=28044
Bug ID: 28044
Summary: [x86, SSE] legalization for SSE1 target doesn't allow
cmpps/cmppd
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Backend: X86
Assignee: unassignedb...@nondot.org
Reporter: spatel+l...@rotateright.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Forking this off of bug 28001:
define <4 x float> @test_mm_cmpeq_ps(<4 x float> %a0, <4 x float> %a1) nounwind
{
%cmp = fcmp oeq <4 x float> %a0, %a1
%sext = sext <4 x i1> %cmp to <4 x i32>
%res = bitcast <4 x i32> %sext to <4 x float>
ret <4 x float> %res
}
This should be 'cmpeqps', but DAG type legalization doesn't like the <4 x i32>
type for an SSE1 target, so:
$ ./llc -o - cmpeq.ll -mattr=sse,-sse2
...
movaps %xmm1, %xmm2
shufps $231, %xmm2, %xmm2 ## xmm2 = xmm2[3,1,2,3]
movaps %xmm0, %xmm3
shufps $231, %xmm3, %xmm3 ## xmm3 = xmm3[3,1,2,3]
ucomiss %xmm2, %xmm3
setnp %al
sete %cl
andb %al, %cl
movzbl %cl, %eax
shll $31, %eax
sarl $31, %eax
movl %eax, -8(%rsp)
movaps %xmm1, %xmm2
shufps $229, %xmm2, %xmm2 ## xmm2 = xmm2[1,1,2,3]
movaps %xmm0, %xmm3
shufps $229, %xmm3, %xmm3 ## xmm3 = xmm3[1,1,2,3]
ucomiss %xmm2, %xmm3
setnp %al
sete %cl
andb %al, %cl
movzbl %cl, %eax
shll $31, %eax
sarl $31, %eax
movl %eax, -12(%rsp)
ucomiss %xmm1, %xmm0
setnp %al
sete %cl
andb %al, %cl
movzbl %cl, %eax
shll $31, %eax
sarl $31, %eax
movl %eax, -16(%rsp)
shufps $230, %xmm1, %xmm1 ## xmm1 = xmm1[2,1,2,3]
shufps $230, %xmm0, %xmm0 ## xmm0 = xmm0[2,1,2,3]
ucomiss %xmm1, %xmm0
setnp %al
sete %cl
andb %al, %cl
movzbl %cl, %eax
shll $31, %eax
sarl $31, %eax
movl %eax, -4(%rsp)
movss -8(%rsp), %xmm0 ## xmm0 = mem[0],zero,zero,zero
movss -12(%rsp), %xmm1 ## xmm1 = mem[0],zero,zero,zero
unpcklps %xmm0, %xmm1 ## xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1]
movss -16(%rsp), %xmm0 ## xmm0 = mem[0],zero,zero,zero
movss -4(%rsp), %xmm2 ## xmm2 = mem[0],zero,zero,zero
unpcklps %xmm2, %xmm0 ## xmm0 = xmm0[0],xmm2[0],xmm0[1],xmm2[1]
unpcklps %xmm1, %xmm0 ## xmm0 = xmm0[0],xmm1[0],xmm0[1],xmm1[1]
retq
--
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