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[X86] Add test to show missed opportunities to calculate knownbits in INSERT_VECTOR_ELT 

llvm-svn: 288912
This commit is contained in:
Simon Pilgrim 2016-12-07 15:27:18 +00:00
parent 33f2a669c1
commit b421ef2370
1 changed files with 37 additions and 0 deletions
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37
llvm/test/CodeGen/X86/known-bits-vector.ll
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@ -50,6 +50,43 @@ define float @knownbits_mask_extract_uitofp(<2 x i64> %a0) nounwind {
ret float %3
}
define <4 x float> @knownbits_insert_uitofp(<4 x i32> %a0, i16 %a1, i16 %a2) nounwind {
; X32-LABEL: knownbits_insert_uitofp:
; X32: # BB#0:
; X32-NEXT: movzwl {{[0-9]+}}(%esp), %eax
; X32-NEXT: movzwl {{[0-9]+}}(%esp), %ecx
; X32-NEXT: vpinsrd $0, %eax, %xmm0, %xmm0
; X32-NEXT: vpinsrd $2, %ecx, %xmm0, %xmm0
; X32-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,0,2,2]
; X32-NEXT: vpblendw {{.*#+}} xmm1 = xmm0[0],mem[1],xmm0[2],mem[3],xmm0[4],mem[5],xmm0[6],mem[7]
; X32-NEXT: vpsrld $16, %xmm0, %xmm0
; X32-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0],mem[1],xmm0[2],mem[3],xmm0[4],mem[5],xmm0[6],mem[7]
; X32-NEXT: vaddps {{\.LCPI.*}}, %xmm0, %xmm0
; X32-NEXT: vaddps %xmm0, %xmm1, %xmm0
; X32-NEXT: retl
;
; X64-LABEL: knownbits_insert_uitofp:
; X64: # BB#0:
; X64-NEXT: movzwl %di, %eax
; X64-NEXT: movzwl %si, %ecx
; X64-NEXT: vpinsrd $0, %eax, %xmm0, %xmm0
; X64-NEXT: vpinsrd $2, %ecx, %xmm0, %xmm0
; X64-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,0,2,2]
; X64-NEXT: vpblendw {{.*#+}} xmm1 = xmm0[0],mem[1],xmm0[2],mem[3],xmm0[4],mem[5],xmm0[6],mem[7]
; X64-NEXT: vpsrld $16, %xmm0, %xmm0
; X64-NEXT: vpblendw {{.*#+}} xmm0 = xmm0[0],mem[1],xmm0[2],mem[3],xmm0[4],mem[5],xmm0[6],mem[7]
; X64-NEXT: vaddps {{.*}}(%rip), %xmm0, %xmm0
; X64-NEXT: vaddps %xmm0, %xmm1, %xmm0
; X64-NEXT: retq
%1 = zext i16 %a1 to i32
%2 = zext i16 %a2 to i32
%3 = insertelement <4 x i32> %a0, i32 %1, i32 0
%4 = insertelement <4 x i32> %3, i32 %2, i32 2
%5 = shufflevector <4 x i32> %4, <4 x i32> undef, <4 x i32> <i32 0, i32 0, i32 2, i32 2>
%6 = uitofp <4 x i32> %5 to <4 x float>
ret <4 x float> %6
}
define <4 x i32> @knownbits_mask_shuffle_sext(<8 x i16> %a0) nounwind {
; X32-LABEL: knownbits_mask_shuffle_sext:
; X32: # BB#0: