forked from OSchip/llvm-project
[X86] combineSetCCMOVMSK - fold allof(cmpeq(x,y)) -> ptest(sub(x,y)) (PR53379)
As suggested on PR53379, for all-of icmp-eq patterns, we can use ptest(sub(x,y)) on SSE41+ targets This is a generalization of the existing allof(cmpeq(x,0)) -> ptest(x) pattern We can probably extend this further, in particularly to handle 256-bit cases on pre-AVX2 targets, but this part of the generalization is pretty trivial Fixes Issue #53379
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699e22a083
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@ -44457,12 +44457,15 @@ static SDValue combineSetCCMOVMSK(SDValue EFLAGS, X86::CondCode &CC,
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// MOVMSK(PCMPEQ(X,0)) == -1 -> PTESTZ(X,X).
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// MOVMSK(PCMPEQ(X,0)) != -1 -> !PTESTZ(X,X).
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// MOVMSK(PCMPEQ(X,Y)) == -1 -> PTESTZ(SUB(X,Y),SUB(X,Y)).
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// MOVMSK(PCMPEQ(X,Y)) != -1 -> !PTESTZ(SUB(X,Y),SUB(X,Y)).
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if (IsAllOf && Subtarget.hasSSE41()) {
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SDValue BC = peekThroughBitcasts(Vec);
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if (BC.getOpcode() == X86ISD::PCMPEQ &&
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ISD::isBuildVectorAllZeros(BC.getOperand(1).getNode())) {
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if (BC.getOpcode() == X86ISD::PCMPEQ) {
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MVT TestVT = VecVT.is128BitVector() ? MVT::v2i64 : MVT::v4i64;
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SDValue V = DAG.getBitcast(TestVT, BC.getOperand(0));
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SDValue V = DAG.getNode(ISD::SUB, SDLoc(BC), BC.getValueType(),
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BC.getOperand(0), BC.getOperand(1));
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V = DAG.getBitcast(TestVT, V);
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return DAG.getNode(X86ISD::PTEST, SDLoc(EFLAGS), MVT::i32, V, V);
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}
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}
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@ -44500,7 +44503,14 @@ static SDValue combineSetCCMOVMSK(SDValue EFLAGS, X86::CondCode &CC,
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VecOp1.getConstantOperandAPInt(1) == 8 &&
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(IsAnyOf || (SignExt0 && SignExt1))) {
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SDLoc DL(EFLAGS);
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SDValue Result = DAG.getBitcast(MVT::v32i8, VecOp0.getOperand(0));
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SDValue Result = peekThroughBitcasts(VecOp0.getOperand(0));
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if (IsAllOf && Result.getOpcode() == X86ISD::PCMPEQ) {
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SDValue V = DAG.getNode(ISD::SUB, DL, Result.getValueType(),
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Result.getOperand(0), Result.getOperand(1));
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V = DAG.getBitcast(MVT::v4i64, V);
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return DAG.getNode(X86ISD::PTEST, SDLoc(EFLAGS), MVT::i32, V, V);
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}
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Result = DAG.getBitcast(MVT::v32i8, Result);
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Result = DAG.getNode(X86ISD::MOVMSK, DL, MVT::i32, Result);
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unsigned CmpMask = IsAnyOf ? 0 : 0xFFFFFFFF;
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if (!SignExt0 || !SignExt1) {
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@ -4162,17 +4162,15 @@ define i1 @movmsk_or_v2i64(<2 x i64> %x, <2 x i64> %y) {
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;
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; SSE41-LABEL: movmsk_or_v2i64:
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; SSE41: # %bb.0:
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; SSE41-NEXT: pcmpeqq %xmm1, %xmm0
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; SSE41-NEXT: movmskpd %xmm0, %eax
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; SSE41-NEXT: cmpl $3, %eax
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; SSE41-NEXT: psubq %xmm1, %xmm0
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; SSE41-NEXT: ptest %xmm0, %xmm0
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; SSE41-NEXT: setne %al
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; SSE41-NEXT: retq
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;
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; AVX1OR2-LABEL: movmsk_or_v2i64:
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; AVX1OR2: # %bb.0:
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; AVX1OR2-NEXT: vpcmpeqq %xmm1, %xmm0, %xmm0
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; AVX1OR2-NEXT: vmovmskpd %xmm0, %eax
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; AVX1OR2-NEXT: cmpl $3, %eax
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; AVX1OR2-NEXT: vpsubq %xmm1, %xmm0, %xmm0
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; AVX1OR2-NEXT: vptest %xmm0, %xmm0
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; AVX1OR2-NEXT: setne %al
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; AVX1OR2-NEXT: retq
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;
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@ -1249,9 +1249,8 @@ define i1 @bool_reduction_v8i32(<8 x i32> %x, <8 x i32> %y) {
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; AVX2-LABEL: bool_reduction_v8i32:
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; AVX2: # %bb.0:
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; AVX2-NEXT: vpminud %ymm1, %ymm0, %ymm1
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; AVX2-NEXT: vpcmpeqd %ymm1, %ymm0, %ymm0
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; AVX2-NEXT: vmovmskps %ymm0, %eax
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; AVX2-NEXT: cmpb $-1, %al
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; AVX2-NEXT: vpsubd %ymm1, %ymm0, %ymm0
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; AVX2-NEXT: vptest %ymm0, %ymm0
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; AVX2-NEXT: sete %al
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; AVX2-NEXT: vzeroupper
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; AVX2-NEXT: retq
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@ -1301,9 +1300,8 @@ define i1 @bool_reduction_v16i16(<16 x i16> %x, <16 x i16> %y) {
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;
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; AVX2-LABEL: bool_reduction_v16i16:
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; AVX2: # %bb.0:
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; AVX2-NEXT: vpcmpeqw %ymm1, %ymm0, %ymm0
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; AVX2-NEXT: vpmovmskb %ymm0, %eax
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; AVX2-NEXT: cmpl $-1, %eax
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; AVX2-NEXT: vpsubw %ymm1, %ymm0, %ymm0
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; AVX2-NEXT: vptest %ymm0, %ymm0
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; AVX2-NEXT: sete %al
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; AVX2-NEXT: vzeroupper
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; AVX2-NEXT: retq
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@ -1354,9 +1352,8 @@ define i1 @bool_reduction_v32i8(<32 x i8> %x, <32 x i8> %y) {
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;
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; AVX2-LABEL: bool_reduction_v32i8:
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; AVX2: # %bb.0:
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; AVX2-NEXT: vpcmpeqb %ymm1, %ymm0, %ymm0
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; AVX2-NEXT: vpmovmskb %ymm0, %eax
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; AVX2-NEXT: cmpl $-1, %eax
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; AVX2-NEXT: vpsubb %ymm1, %ymm0, %ymm0
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; AVX2-NEXT: vptest %ymm0, %ymm0
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; AVX2-NEXT: sete %al
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; AVX2-NEXT: vzeroupper
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; AVX2-NEXT: retq
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@ -959,17 +959,15 @@ define i1 @bool_reduction_v2i64(<2 x i64> %x, <2 x i64> %y) {
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define i1 @bool_reduction_v4i32(<4 x i32> %x, <4 x i32> %y) {
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; SSE-LABEL: bool_reduction_v4i32:
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; SSE: # %bb.0:
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; SSE-NEXT: pcmpeqd %xmm1, %xmm0
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; SSE-NEXT: movmskps %xmm0, %eax
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; SSE-NEXT: cmpl $15, %eax
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; SSE-NEXT: psubd %xmm1, %xmm0
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; SSE-NEXT: ptest %xmm0, %xmm0
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; SSE-NEXT: setne %al
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; SSE-NEXT: retq
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;
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; AVX-LABEL: bool_reduction_v4i32:
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; AVX: # %bb.0:
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; AVX-NEXT: vpcmpeqd %xmm1, %xmm0, %xmm0
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; AVX-NEXT: vmovmskps %xmm0, %eax
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; AVX-NEXT: cmpl $15, %eax
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; AVX-NEXT: vpsubd %xmm1, %xmm0, %xmm0
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; AVX-NEXT: vptest %xmm0, %xmm0
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; AVX-NEXT: setne %al
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; AVX-NEXT: retq
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;
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@ -1210,10 +1210,7 @@ define i1 @icmp0_v16i16_v16i1(<16 x i16>) {
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;
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; AVX2-LABEL: icmp0_v16i16_v16i1:
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; AVX2: # %bb.0:
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; AVX2-NEXT: vpxor %xmm1, %xmm1, %xmm1
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; AVX2-NEXT: vpcmpeqw %ymm1, %ymm0, %ymm0
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; AVX2-NEXT: vpmovmskb %ymm0, %eax
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; AVX2-NEXT: cmpl $-1, %eax
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; AVX2-NEXT: vptest %ymm0, %ymm0
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; AVX2-NEXT: sete %al
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; AVX2-NEXT: vzeroupper
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; AVX2-NEXT: retq
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@ -1679,17 +1676,15 @@ define i1 @icmp_v2i64_v2i1(<2 x i64>, <2 x i64>) {
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;
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; SSE41-LABEL: icmp_v2i64_v2i1:
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; SSE41: # %bb.0:
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; SSE41-NEXT: pcmpeqq %xmm1, %xmm0
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; SSE41-NEXT: movmskpd %xmm0, %eax
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; SSE41-NEXT: cmpb $3, %al
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; SSE41-NEXT: psubq %xmm1, %xmm0
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; SSE41-NEXT: ptest %xmm0, %xmm0
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; SSE41-NEXT: sete %al
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; SSE41-NEXT: retq
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;
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; AVX-LABEL: icmp_v2i64_v2i1:
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; AVX: # %bb.0:
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; AVX-NEXT: vpcmpeqq %xmm1, %xmm0, %xmm0
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; AVX-NEXT: vmovmskpd %xmm0, %eax
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; AVX-NEXT: cmpb $3, %al
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; AVX-NEXT: vpsubq %xmm1, %xmm0, %xmm0
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; AVX-NEXT: vptest %xmm0, %xmm0
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; AVX-NEXT: sete %al
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; AVX-NEXT: retq
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;
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@ -1728,19 +1723,25 @@ define i1 @icmp_v2i64_v2i1(<2 x i64>, <2 x i64>) {
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}
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define i1 @icmp_v4i32_v4i1(<4 x i32>, <4 x i32>) {
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; SSE-LABEL: icmp_v4i32_v4i1:
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; SSE: # %bb.0:
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; SSE-NEXT: pcmpeqd %xmm1, %xmm0
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; SSE-NEXT: movmskps %xmm0, %eax
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; SSE-NEXT: cmpb $15, %al
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; SSE-NEXT: sete %al
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; SSE-NEXT: retq
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; SSE2-LABEL: icmp_v4i32_v4i1:
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; SSE2: # %bb.0:
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; SSE2-NEXT: pcmpeqd %xmm1, %xmm0
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; SSE2-NEXT: movmskps %xmm0, %eax
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; SSE2-NEXT: cmpb $15, %al
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; SSE2-NEXT: sete %al
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; SSE2-NEXT: retq
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;
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; SSE41-LABEL: icmp_v4i32_v4i1:
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; SSE41: # %bb.0:
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; SSE41-NEXT: psubd %xmm1, %xmm0
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; SSE41-NEXT: ptest %xmm0, %xmm0
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; SSE41-NEXT: sete %al
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; SSE41-NEXT: retq
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;
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; AVX-LABEL: icmp_v4i32_v4i1:
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; AVX: # %bb.0:
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; AVX-NEXT: vpcmpeqd %xmm1, %xmm0, %xmm0
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; AVX-NEXT: vmovmskps %xmm0, %eax
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; AVX-NEXT: cmpb $15, %al
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; AVX-NEXT: vpsubd %xmm1, %xmm0, %xmm0
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; AVX-NEXT: vptest %xmm0, %xmm0
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; AVX-NEXT: sete %al
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; AVX-NEXT: retq
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;
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@ -1832,27 +1833,32 @@ define i1 @icmp_v8i16_v8i1(<8 x i16>, <8 x i16>) {
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}
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define i1 @icmp_v16i8_v16i1(<16 x i8>, <16 x i8>) {
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; SSE-LABEL: icmp_v16i8_v16i1:
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; SSE: # %bb.0:
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; SSE-NEXT: pcmpeqb %xmm1, %xmm0
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; SSE-NEXT: pmovmskb %xmm0, %eax
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; SSE-NEXT: cmpw $-1, %ax
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; SSE-NEXT: sete %al
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; SSE-NEXT: retq
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; SSE2-LABEL: icmp_v16i8_v16i1:
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; SSE2: # %bb.0:
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; SSE2-NEXT: pcmpeqb %xmm1, %xmm0
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; SSE2-NEXT: pmovmskb %xmm0, %eax
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; SSE2-NEXT: cmpw $-1, %ax
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; SSE2-NEXT: sete %al
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; SSE2-NEXT: retq
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;
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; SSE41-LABEL: icmp_v16i8_v16i1:
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; SSE41: # %bb.0:
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; SSE41-NEXT: psubb %xmm1, %xmm0
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; SSE41-NEXT: ptest %xmm0, %xmm0
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; SSE41-NEXT: sete %al
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; SSE41-NEXT: retq
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;
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; AVX-LABEL: icmp_v16i8_v16i1:
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; AVX: # %bb.0:
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; AVX-NEXT: vpcmpeqb %xmm1, %xmm0, %xmm0
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; AVX-NEXT: vpmovmskb %xmm0, %eax
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; AVX-NEXT: cmpw $-1, %ax
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; AVX-NEXT: vpsubb %xmm1, %xmm0, %xmm0
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; AVX-NEXT: vptest %xmm0, %xmm0
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; AVX-NEXT: sete %al
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; AVX-NEXT: retq
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;
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; AVX512F-LABEL: icmp_v16i8_v16i1:
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; AVX512F: # %bb.0:
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; AVX512F-NEXT: vpcmpeqb %xmm1, %xmm0, %xmm0
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; AVX512F-NEXT: vpmovmskb %xmm0, %eax
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; AVX512F-NEXT: cmpw $-1, %ax
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; AVX512F-NEXT: vpsubb %xmm1, %xmm0, %xmm0
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; AVX512F-NEXT: vptest %xmm0, %xmm0
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; AVX512F-NEXT: sete %al
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; AVX512F-NEXT: retq
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;
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;
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; AVX2-LABEL: icmp_v4i64_v4i1:
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; AVX2: # %bb.0:
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; AVX2-NEXT: vpcmpeqq %ymm1, %ymm0, %ymm0
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; AVX2-NEXT: vmovmskpd %ymm0, %eax
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; AVX2-NEXT: cmpb $15, %al
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; AVX2-NEXT: vpsubq %ymm1, %ymm0, %ymm0
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; AVX2-NEXT: vptest %ymm0, %ymm0
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; AVX2-NEXT: sete %al
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; AVX2-NEXT: vzeroupper
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; AVX2-NEXT: retq
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;
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; AVX2-LABEL: icmp_v8i32_v8i1:
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; AVX2: # %bb.0:
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; AVX2-NEXT: vpcmpeqd %ymm1, %ymm0, %ymm0
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; AVX2-NEXT: vmovmskps %ymm0, %eax
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; AVX2-NEXT: cmpb $-1, %al
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; AVX2-NEXT: vpsubd %ymm1, %ymm0, %ymm0
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; AVX2-NEXT: vptest %ymm0, %ymm0
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; AVX2-NEXT: sete %al
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; AVX2-NEXT: vzeroupper
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; AVX2-NEXT: retq
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;
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; AVX2-LABEL: icmp_v16i16_v16i1:
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; AVX2: # %bb.0:
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; AVX2-NEXT: vpcmpeqw %ymm1, %ymm0, %ymm0
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; AVX2-NEXT: vpmovmskb %ymm0, %eax
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; AVX2-NEXT: cmpl $-1, %eax
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; AVX2-NEXT: vpsubw %ymm1, %ymm0, %ymm0
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; AVX2-NEXT: vptest %ymm0, %ymm0
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; AVX2-NEXT: sete %al
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; AVX2-NEXT: vzeroupper
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; AVX2-NEXT: retq
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;
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; AVX2-LABEL: icmp_v32i8_v32i1:
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; AVX2: # %bb.0:
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; AVX2-NEXT: vpcmpeqb %ymm1, %ymm0, %ymm0
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; AVX2-NEXT: vpmovmskb %ymm0, %eax
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; AVX2-NEXT: cmpl $-1, %eax
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; AVX2-NEXT: vpsubb %ymm1, %ymm0, %ymm0
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; AVX2-NEXT: vptest %ymm0, %ymm0
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; AVX2-NEXT: sete %al
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; AVX2-NEXT: vzeroupper
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; AVX2-NEXT: retq
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