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[X86] Combine fminnum/fmaxnum with non-nan operand to fmin/fmax
If we have a known non-nan operand, place it in the second operand of fmin/fmax that is returned if either operand is nan. Differential Revision: https://reviews.llvm.org/D62448 llvm-svn: 361704
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@ -40511,9 +40511,6 @@ static SDValue combineFMinNumFMaxNum(SDNode *N, SelectionDAG &DAG,
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const TargetLowering &TLI = DAG.getTargetLoweringInfo();
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// TODO: If an operand is already known to be a NaN or not a NaN, this
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// should be an optional swap and FMAX/FMIN.
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EVT VT = N->getValueType(0);
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if (!((Subtarget.hasSSE1() && VT == MVT::f32) ||
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(Subtarget.hasSSE2() && VT == MVT::f64) ||
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@ -40530,6 +40527,13 @@ static SDValue combineFMinNumFMaxNum(SDNode *N, SelectionDAG &DAG,
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if (DAG.getTarget().Options.NoNaNsFPMath || N->getFlags().hasNoNaNs())
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return DAG.getNode(MinMaxOp, DL, VT, Op0, Op1, N->getFlags());
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// If one of the operands is known non-NaN use the native min/max instructions
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// with the non-NaN input as second operand.
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if (DAG.isKnownNeverNaN(Op1))
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return DAG.getNode(MinMaxOp, DL, VT, Op0, Op1, N->getFlags());
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if (DAG.isKnownNeverNaN(Op0))
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return DAG.getNode(MinMaxOp, DL, VT, Op1, Op0, N->getFlags());
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// If we have to respect NaN inputs, this takes at least 3 instructions.
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// Favor a library call when operating on a scalar and minimizing code size.
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if (!VT.isVector() && DAG.getMachineFunction().getFunction().hasMinSize())
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@ -86,16 +86,8 @@ define float @ext_frem_v4f32_constant_op0(<4 x float> %x) {
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define float @ext_maxnum_v4f32(<4 x float> %x) nounwind {
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; CHECK-LABEL: ext_maxnum_v4f32:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movss {{.*#+}} xmm2 = mem[0],zero,zero,zero
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; CHECK-NEXT: movhlps {{.*#+}} xmm0 = xmm0[1,1]
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; CHECK-NEXT: movaps %xmm0, %xmm1
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; CHECK-NEXT: cmpunordss %xmm0, %xmm1
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; CHECK-NEXT: movaps %xmm1, %xmm3
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; CHECK-NEXT: andps %xmm2, %xmm3
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; CHECK-NEXT: maxss %xmm0, %xmm2
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; CHECK-NEXT: andnps %xmm2, %xmm1
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; CHECK-NEXT: orps %xmm3, %xmm1
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; CHECK-NEXT: movaps %xmm1, %xmm0
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; CHECK-NEXT: maxss {{.*}}(%rip), %xmm0
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; CHECK-NEXT: retq
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%v = call <4 x float> @llvm.maxnum.v4f32(<4 x float> %x, <4 x float> <float 0.0, float 1.0, float 2.0, float 3.0>)
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%r = extractelement <4 x float> %v, i32 2
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@ -105,16 +97,8 @@ define float @ext_maxnum_v4f32(<4 x float> %x) nounwind {
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define double @ext_minnum_v2f64(<2 x double> %x) nounwind {
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; CHECK-LABEL: ext_minnum_v2f64:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movsd {{.*#+}} xmm2 = mem[0],zero
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; CHECK-NEXT: unpckhpd {{.*#+}} xmm0 = xmm0[1,1]
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; CHECK-NEXT: movapd %xmm0, %xmm1
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; CHECK-NEXT: cmpunordsd %xmm0, %xmm1
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; CHECK-NEXT: movapd %xmm1, %xmm3
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; CHECK-NEXT: andpd %xmm2, %xmm3
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; CHECK-NEXT: minsd %xmm0, %xmm2
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; CHECK-NEXT: andnpd %xmm2, %xmm1
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; CHECK-NEXT: orpd %xmm3, %xmm1
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; CHECK-NEXT: movapd %xmm1, %xmm0
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; CHECK-NEXT: minsd {{.*}}(%rip), %xmm0
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; CHECK-NEXT: retq
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%v = call <2 x double> @llvm.minnum.v2f64(<2 x double> <double 0.0, double 1.0>, <2 x double> %x)
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%r = extractelement <2 x double> %v, i32 1
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@ -472,33 +472,13 @@ define <2 x double> @maxnum_intrinsic_nnan_attr_f64(<2 x double> %a, <2 x double
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define float @test_maxnum_const_op1(float %x) {
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; SSE-LABEL: test_maxnum_const_op1:
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; SSE: # %bb.0:
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; SSE-NEXT: movss {{.*#+}} xmm2 = mem[0],zero,zero,zero
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; SSE-NEXT: movaps %xmm0, %xmm1
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; SSE-NEXT: cmpunordss %xmm0, %xmm1
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; SSE-NEXT: movaps %xmm1, %xmm3
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; SSE-NEXT: andps %xmm2, %xmm3
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; SSE-NEXT: maxss %xmm0, %xmm2
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; SSE-NEXT: andnps %xmm2, %xmm1
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; SSE-NEXT: orps %xmm3, %xmm1
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; SSE-NEXT: movaps %xmm1, %xmm0
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; SSE-NEXT: maxss {{.*}}(%rip), %xmm0
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; SSE-NEXT: retq
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;
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; AVX1-LABEL: test_maxnum_const_op1:
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; AVX1: # %bb.0:
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; AVX1-NEXT: vmovss {{.*#+}} xmm1 = mem[0],zero,zero,zero
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; AVX1-NEXT: vmaxss %xmm0, %xmm1, %xmm2
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; AVX1-NEXT: vcmpunordss %xmm0, %xmm0, %xmm0
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; AVX1-NEXT: vblendvps %xmm0, %xmm1, %xmm2, %xmm0
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; AVX1-NEXT: retq
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;
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; AVX512-LABEL: test_maxnum_const_op1:
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; AVX512: # %bb.0:
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; AVX512-NEXT: vmovss {{.*#+}} xmm2 = mem[0],zero,zero,zero
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; AVX512-NEXT: vmaxss %xmm0, %xmm2, %xmm1
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; AVX512-NEXT: vcmpunordss %xmm0, %xmm0, %k1
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; AVX512-NEXT: vmovss %xmm2, %xmm0, %xmm1 {%k1}
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; AVX512-NEXT: vmovaps %xmm1, %xmm0
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; AVX512-NEXT: retq
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; AVX-LABEL: test_maxnum_const_op1:
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; AVX: # %bb.0:
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; AVX-NEXT: vmaxss {{.*}}(%rip), %xmm0, %xmm0
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; AVX-NEXT: retq
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%r = call float @llvm.maxnum.f32(float 1.0, float %x)
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ret float %r
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}
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@ -506,33 +486,13 @@ define float @test_maxnum_const_op1(float %x) {
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define float @test_maxnum_const_op2(float %x) {
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; SSE-LABEL: test_maxnum_const_op2:
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; SSE: # %bb.0:
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; SSE-NEXT: movss {{.*#+}} xmm2 = mem[0],zero,zero,zero
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; SSE-NEXT: movaps %xmm0, %xmm1
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; SSE-NEXT: cmpunordss %xmm0, %xmm1
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; SSE-NEXT: movaps %xmm1, %xmm3
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; SSE-NEXT: andps %xmm2, %xmm3
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; SSE-NEXT: maxss %xmm0, %xmm2
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; SSE-NEXT: andnps %xmm2, %xmm1
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; SSE-NEXT: orps %xmm3, %xmm1
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; SSE-NEXT: movaps %xmm1, %xmm0
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; SSE-NEXT: maxss {{.*}}(%rip), %xmm0
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; SSE-NEXT: retq
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;
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; AVX1-LABEL: test_maxnum_const_op2:
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; AVX1: # %bb.0:
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; AVX1-NEXT: vmovss {{.*#+}} xmm1 = mem[0],zero,zero,zero
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; AVX1-NEXT: vmaxss %xmm0, %xmm1, %xmm2
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; AVX1-NEXT: vcmpunordss %xmm0, %xmm0, %xmm0
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; AVX1-NEXT: vblendvps %xmm0, %xmm1, %xmm2, %xmm0
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; AVX1-NEXT: retq
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;
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; AVX512-LABEL: test_maxnum_const_op2:
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; AVX512: # %bb.0:
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; AVX512-NEXT: vmovss {{.*#+}} xmm2 = mem[0],zero,zero,zero
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; AVX512-NEXT: vmaxss %xmm0, %xmm2, %xmm1
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; AVX512-NEXT: vcmpunordss %xmm0, %xmm0, %k1
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; AVX512-NEXT: vmovss %xmm2, %xmm0, %xmm1 {%k1}
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; AVX512-NEXT: vmovaps %xmm1, %xmm0
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; AVX512-NEXT: retq
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; AVX-LABEL: test_maxnum_const_op2:
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; AVX: # %bb.0:
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; AVX-NEXT: vmaxss {{.*}}(%rip), %xmm0, %xmm0
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; AVX-NEXT: retq
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%r = call float @llvm.maxnum.f32(float %x, float 1.0)
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ret float %r
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}
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@ -472,33 +472,13 @@ define <4 x float> @minnum_intrinsic_nnan_attr_v4f32(<4 x float> %a, <4 x float>
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define float @test_minnum_const_op1(float %x) {
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; SSE-LABEL: test_minnum_const_op1:
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; SSE: # %bb.0:
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; SSE-NEXT: movss {{.*#+}} xmm2 = mem[0],zero,zero,zero
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; SSE-NEXT: movaps %xmm0, %xmm1
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; SSE-NEXT: cmpunordss %xmm0, %xmm1
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; SSE-NEXT: movaps %xmm1, %xmm3
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; SSE-NEXT: andps %xmm2, %xmm3
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; SSE-NEXT: minss %xmm0, %xmm2
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; SSE-NEXT: andnps %xmm2, %xmm1
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; SSE-NEXT: orps %xmm3, %xmm1
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; SSE-NEXT: movaps %xmm1, %xmm0
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; SSE-NEXT: minss {{.*}}(%rip), %xmm0
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; SSE-NEXT: retq
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;
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; AVX1-LABEL: test_minnum_const_op1:
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; AVX1: # %bb.0:
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; AVX1-NEXT: vmovss {{.*#+}} xmm1 = mem[0],zero,zero,zero
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; AVX1-NEXT: vminss %xmm0, %xmm1, %xmm2
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; AVX1-NEXT: vcmpunordss %xmm0, %xmm0, %xmm0
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; AVX1-NEXT: vblendvps %xmm0, %xmm1, %xmm2, %xmm0
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; AVX1-NEXT: retq
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;
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; AVX512-LABEL: test_minnum_const_op1:
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; AVX512: # %bb.0:
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; AVX512-NEXT: vmovss {{.*#+}} xmm2 = mem[0],zero,zero,zero
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; AVX512-NEXT: vminss %xmm0, %xmm2, %xmm1
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; AVX512-NEXT: vcmpunordss %xmm0, %xmm0, %k1
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; AVX512-NEXT: vmovss %xmm2, %xmm0, %xmm1 {%k1}
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; AVX512-NEXT: vmovaps %xmm1, %xmm0
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; AVX512-NEXT: retq
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; AVX-LABEL: test_minnum_const_op1:
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; AVX: # %bb.0:
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; AVX-NEXT: vminss {{.*}}(%rip), %xmm0, %xmm0
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; AVX-NEXT: retq
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%r = call float @llvm.minnum.f32(float 1.0, float %x)
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ret float %r
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}
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@ -506,33 +486,13 @@ define float @test_minnum_const_op1(float %x) {
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define float @test_minnum_const_op2(float %x) {
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; SSE-LABEL: test_minnum_const_op2:
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; SSE: # %bb.0:
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; SSE-NEXT: movss {{.*#+}} xmm2 = mem[0],zero,zero,zero
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; SSE-NEXT: movaps %xmm0, %xmm1
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; SSE-NEXT: cmpunordss %xmm0, %xmm1
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; SSE-NEXT: movaps %xmm1, %xmm3
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; SSE-NEXT: andps %xmm2, %xmm3
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; SSE-NEXT: minss %xmm0, %xmm2
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; SSE-NEXT: andnps %xmm2, %xmm1
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; SSE-NEXT: orps %xmm3, %xmm1
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; SSE-NEXT: movaps %xmm1, %xmm0
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; SSE-NEXT: minss {{.*}}(%rip), %xmm0
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; SSE-NEXT: retq
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;
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; AVX1-LABEL: test_minnum_const_op2:
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; AVX1: # %bb.0:
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; AVX1-NEXT: vmovss {{.*#+}} xmm1 = mem[0],zero,zero,zero
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; AVX1-NEXT: vminss %xmm0, %xmm1, %xmm2
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; AVX1-NEXT: vcmpunordss %xmm0, %xmm0, %xmm0
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; AVX1-NEXT: vblendvps %xmm0, %xmm1, %xmm2, %xmm0
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; AVX1-NEXT: retq
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;
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; AVX512-LABEL: test_minnum_const_op2:
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; AVX512: # %bb.0:
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; AVX512-NEXT: vmovss {{.*#+}} xmm2 = mem[0],zero,zero,zero
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; AVX512-NEXT: vminss %xmm0, %xmm2, %xmm1
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; AVX512-NEXT: vcmpunordss %xmm0, %xmm0, %k1
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; AVX512-NEXT: vmovss %xmm2, %xmm0, %xmm1 {%k1}
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; AVX512-NEXT: vmovaps %xmm1, %xmm0
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; AVX512-NEXT: retq
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; AVX-LABEL: test_minnum_const_op2:
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; AVX: # %bb.0:
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; AVX-NEXT: vminss {{.*}}(%rip), %xmm0, %xmm0
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; AVX-NEXT: retq
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%r = call float @llvm.minnum.f32(float %x, float 1.0)
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ret float %r
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}
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