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[X86][SSE] Don't attempt to reduce the imul vector width of odd sized vectors (PR34947)

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llvm-svn: 315825
This commit is contained in:
Simon Pilgrim 2017-10-14 19:57:19 +00:00
parent 47d85eb111
commit 2aaf2a8035
2 changed files with 109 additions and 1 deletions
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5
lib/Target/X86/X86ISelLowering.cpp
View File

@ -31476,6 +31476,9 @@ static SDValue reduceVMULWidth(SDNode *N, SelectionDAG &DAG,
SDValue N1 = N->getOperand(1);
EVT VT = N->getOperand(0).getValueType();
unsigned NumElts = VT.getVectorNumElements();
if ((NumElts % 2) != 0)
return SDValue();
unsigned RegSize = 128;
MVT OpsVT = MVT::getVectorVT(MVT::i16, RegSize / 16);
EVT ReducedVT = EVT::getVectorVT(*DAG.getContext(), MVT::i16, NumElts);
@ -31502,7 +31505,7 @@ static SDValue reduceVMULWidth(SDNode *N, SelectionDAG &DAG,
// result.
// Generate shuffle functioning as punpcklwd.
SmallVector<int, 16> ShuffleMask(NumElts);
for (unsigned i = 0, e = NumElts/ 2; i < e; i++) {
for (unsigned i = 0, e = NumElts / 2; i < e; i++) {
ShuffleMask[2 * i] = i;
ShuffleMask[2 * i + 1] = i + NumElts;
}

105
test/CodeGen/X86/shrink_vmul.ll
View File

@ -1349,3 +1349,108 @@ entry:
store <2 x i32> %tmp13, <2 x i32>* %tmp15, align 4
ret void
}
;
; Illegal Types
;
define void @PR34947() {
; X86-LABEL: PR34947:
; X86: # BB#0:
; X86-NEXT: movdqa (%eax), %xmm0
; X86-NEXT: pshufd {{.*#+}} xmm1 = xmm0[3,1,2,3]
; X86-NEXT: movd %xmm1, %ecx
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: xorl %edx, %edx
; X86-NEXT: divl %ecx
; X86-NEXT: movd %edx, %xmm1
; X86-NEXT: pshufd {{.*#+}} xmm2 = xmm0[2,3,0,1]
; X86-NEXT: movd %xmm2, %ecx
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: xorl %edx, %edx
; X86-NEXT: divl %ecx
; X86-NEXT: movd %edx, %xmm2
; X86-NEXT: punpckldq {{.*#+}} xmm2 = xmm2[0],xmm1[0],xmm2[1],xmm1[1]
; X86-NEXT: movd %xmm0, %ecx
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: xorl %edx, %edx
; X86-NEXT: divl %ecx
; X86-NEXT: movd %edx, %xmm1
; X86-NEXT: pshufd {{.*#+}} xmm0 = xmm0[1,1,2,3]
; X86-NEXT: movd %xmm0, %ecx
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: xorl %edx, %edx
; X86-NEXT: divl %ecx
; X86-NEXT: movd %edx, %xmm0
; X86-NEXT: punpckldq {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1]
; X86-NEXT: punpcklqdq {{.*#+}} xmm1 = xmm1[0],xmm2[0]
; X86-NEXT: xorl %eax, %eax
; X86-NEXT: xorl %edx, %edx
; X86-NEXT: divl (%eax)
; X86-NEXT: movd %edx, %xmm0
; X86-NEXT: movdqa {{.*#+}} xmm2 = [8199,8199,8199,8199]
; X86-NEXT: pshufd {{.*#+}} xmm3 = xmm1[1,1,3,3]
; X86-NEXT: pmuludq %xmm2, %xmm1
; X86-NEXT: pshufd {{.*#+}} xmm1 = xmm1[0,2,2,3]
; X86-NEXT: pmuludq %xmm2, %xmm3
; X86-NEXT: pshufd {{.*#+}} xmm2 = xmm3[0,2,2,3]
; X86-NEXT: punpckldq {{.*#+}} xmm1 = xmm1[0],xmm2[0],xmm1[1],xmm2[1]
; X86-NEXT: movl $8199, %eax # imm = 0x2007
; X86-NEXT: movd %eax, %xmm2
; X86-NEXT: pmuludq %xmm0, %xmm2
; X86-NEXT: movd %xmm2, (%eax)
; X86-NEXT: movdqa %xmm1, (%eax)
; X86-NEXT: retl
;
; X64-LABEL: PR34947:
; X64: # BB#0:
; X64-NEXT: movdqa (%rax), %xmm0
; X64-NEXT: pshufd {{.*#+}} xmm1 = xmm0[3,1,2,3]
; X64-NEXT: movd %xmm1, %ecx
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: xorl %edx, %edx
; X64-NEXT: divl %ecx
; X64-NEXT: movd %edx, %xmm1
; X64-NEXT: pshufd {{.*#+}} xmm2 = xmm0[2,3,0,1]
; X64-NEXT: movd %xmm2, %ecx
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: xorl %edx, %edx
; X64-NEXT: divl %ecx
; X64-NEXT: movd %edx, %xmm2
; X64-NEXT: punpckldq {{.*#+}} xmm2 = xmm2[0],xmm1[0],xmm2[1],xmm1[1]
; X64-NEXT: movd %xmm0, %ecx
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: xorl %edx, %edx
; X64-NEXT: divl %ecx
; X64-NEXT: movd %edx, %xmm1
; X64-NEXT: pshufd {{.*#+}} xmm0 = xmm0[1,1,2,3]
; X64-NEXT: movd %xmm0, %ecx
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: xorl %edx, %edx
; X64-NEXT: divl %ecx
; X64-NEXT: movd %edx, %xmm0
; X64-NEXT: punpckldq {{.*#+}} xmm1 = xmm1[0],xmm0[0],xmm1[1],xmm0[1]
; X64-NEXT: punpcklqdq {{.*#+}} xmm1 = xmm1[0],xmm2[0]
; X64-NEXT: xorl %eax, %eax
; X64-NEXT: xorl %edx, %edx
; X64-NEXT: divl (%rax)
; X64-NEXT: movd %edx, %xmm0
; X64-NEXT: movdqa {{.*#+}} xmm2 = [8199,8199,8199,8199]
; X64-NEXT: pshufd {{.*#+}} xmm3 = xmm1[1,1,3,3]
; X64-NEXT: pmuludq %xmm2, %xmm1
; X64-NEXT: pshufd {{.*#+}} xmm1 = xmm1[0,2,2,3]
; X64-NEXT: pmuludq %xmm2, %xmm3
; X64-NEXT: pshufd {{.*#+}} xmm2 = xmm3[0,2,2,3]
; X64-NEXT: punpckldq {{.*#+}} xmm1 = xmm1[0],xmm2[0],xmm1[1],xmm2[1]
; X64-NEXT: movl $8199, %eax # imm = 0x2007
; X64-NEXT: movd %eax, %xmm2
; X64-NEXT: pmuludq %xmm0, %xmm2
; X64-NEXT: movd %xmm2, (%rax)
; X64-NEXT: movdqa %xmm1, (%rax)
; X64-NEXT: retq
%tmp = load <9 x i32>, <9 x i32>* undef, align 64
%rem = urem <9 x i32> zeroinitializer, %tmp
%mul = mul <9 x i32> <i32 8199, i32 8199, i32 8199, i32 8199, i32 8199, i32 8199, i32 8199, i32 8199, i32 8199>, %rem
store <9 x i32> %mul, <9 x i32>* undef, align 64
ret void
}