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[InstCombine] Add canonicalization of sitofp -> uitofp nneg #88299

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[InstCombine] Add canonicalization of sitofp -> uitofp nneg #88299

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24 changes: 12 additions & 12 deletions clang/test/Headers/__clang_hip_math.hip
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Original file line number Diff line number Diff line change
Expand Up @@ -1685,7 +1685,7 @@ extern "C" __device__ double test_j1(double x) {
// DEFAULT-NEXT: [[__X1_0_I3:%.*]] = phi float [ [[SUB_I:%.*]], [[FOR_BODY_I]] ], [ [[CALL_I21_I]], [[IF_END4_I]] ]
// DEFAULT-NEXT: [[__X0_0_I2:%.*]] = phi float [ [[__X1_0_I3]], [[FOR_BODY_I]] ], [ [[CALL_I_I]], [[IF_END4_I]] ]
// DEFAULT-NEXT: [[MUL_I:%.*]] = shl nuw nsw i32 [[__I_0_I4]], 1
// DEFAULT-NEXT: [[CONV_I:%.*]] = sitofp i32 [[MUL_I]] to float
// DEFAULT-NEXT: [[CONV_I:%.*]] = uitofp nneg i32 [[MUL_I]] to float
// DEFAULT-NEXT: [[DIV_I:%.*]] = fdiv contract float [[CONV_I]], [[Y]]
// DEFAULT-NEXT: [[MUL8_I:%.*]] = fmul contract float [[__X1_0_I3]], [[DIV_I]]
// DEFAULT-NEXT: [[SUB_I]] = fsub contract float [[MUL8_I]], [[__X0_0_I2]]
Expand Down Expand Up @@ -1718,7 +1718,7 @@ extern "C" __device__ double test_j1(double x) {
// FINITEONLY-NEXT: [[__X1_0_I3:%.*]] = phi float [ [[SUB_I:%.*]], [[FOR_BODY_I]] ], [ [[CALL_I21_I]], [[IF_END4_I]] ]
// FINITEONLY-NEXT: [[__X0_0_I2:%.*]] = phi float [ [[__X1_0_I3]], [[FOR_BODY_I]] ], [ [[CALL_I_I]], [[IF_END4_I]] ]
// FINITEONLY-NEXT: [[MUL_I:%.*]] = shl nuw nsw i32 [[__I_0_I4]], 1
// FINITEONLY-NEXT: [[CONV_I:%.*]] = sitofp i32 [[MUL_I]] to float
// FINITEONLY-NEXT: [[CONV_I:%.*]] = uitofp nneg i32 [[MUL_I]] to float
// FINITEONLY-NEXT: [[DIV_I:%.*]] = fdiv nnan ninf contract float [[CONV_I]], [[Y]]
// FINITEONLY-NEXT: [[MUL8_I:%.*]] = fmul nnan ninf contract float [[__X1_0_I3]], [[DIV_I]]
// FINITEONLY-NEXT: [[SUB_I]] = fsub nnan ninf contract float [[MUL8_I]], [[__X0_0_I2]]
Expand Down Expand Up @@ -1751,7 +1751,7 @@ extern "C" __device__ double test_j1(double x) {
// APPROX-NEXT: [[__X1_0_I3:%.*]] = phi float [ [[SUB_I:%.*]], [[FOR_BODY_I]] ], [ [[CALL_I21_I]], [[IF_END4_I]] ]
// APPROX-NEXT: [[__X0_0_I2:%.*]] = phi float [ [[__X1_0_I3]], [[FOR_BODY_I]] ], [ [[CALL_I_I]], [[IF_END4_I]] ]
// APPROX-NEXT: [[MUL_I:%.*]] = shl nuw nsw i32 [[__I_0_I4]], 1
// APPROX-NEXT: [[CONV_I:%.*]] = sitofp i32 [[MUL_I]] to float
// APPROX-NEXT: [[CONV_I:%.*]] = uitofp nneg i32 [[MUL_I]] to float
// APPROX-NEXT: [[DIV_I:%.*]] = fdiv contract float [[CONV_I]], [[Y]]
// APPROX-NEXT: [[MUL8_I:%.*]] = fmul contract float [[__X1_0_I3]], [[DIV_I]]
// APPROX-NEXT: [[SUB_I]] = fsub contract float [[MUL8_I]], [[__X0_0_I2]]
Expand Down Expand Up @@ -1788,7 +1788,7 @@ extern "C" __device__ float test_jnf(int x, float y) {
// DEFAULT-NEXT: [[__X1_0_I3:%.*]] = phi double [ [[SUB_I:%.*]], [[FOR_BODY_I]] ], [ [[CALL_I21_I]], [[IF_END4_I]] ]
// DEFAULT-NEXT: [[__X0_0_I2:%.*]] = phi double [ [[__X1_0_I3]], [[FOR_BODY_I]] ], [ [[CALL_I_I]], [[IF_END4_I]] ]
// DEFAULT-NEXT: [[MUL_I:%.*]] = shl nuw nsw i32 [[__I_0_I4]], 1
// DEFAULT-NEXT: [[CONV_I:%.*]] = sitofp i32 [[MUL_I]] to double
// DEFAULT-NEXT: [[CONV_I:%.*]] = uitofp nneg i32 [[MUL_I]] to double
// DEFAULT-NEXT: [[DIV_I:%.*]] = fdiv contract double [[CONV_I]], [[Y]]
// DEFAULT-NEXT: [[MUL8_I:%.*]] = fmul contract double [[__X1_0_I3]], [[DIV_I]]
// DEFAULT-NEXT: [[SUB_I]] = fsub contract double [[MUL8_I]], [[__X0_0_I2]]
Expand Down Expand Up @@ -1821,7 +1821,7 @@ extern "C" __device__ float test_jnf(int x, float y) {
// FINITEONLY-NEXT: [[__X1_0_I3:%.*]] = phi double [ [[SUB_I:%.*]], [[FOR_BODY_I]] ], [ [[CALL_I21_I]], [[IF_END4_I]] ]
// FINITEONLY-NEXT: [[__X0_0_I2:%.*]] = phi double [ [[__X1_0_I3]], [[FOR_BODY_I]] ], [ [[CALL_I_I]], [[IF_END4_I]] ]
// FINITEONLY-NEXT: [[MUL_I:%.*]] = shl nuw nsw i32 [[__I_0_I4]], 1
// FINITEONLY-NEXT: [[CONV_I:%.*]] = sitofp i32 [[MUL_I]] to double
// FINITEONLY-NEXT: [[CONV_I:%.*]] = uitofp nneg i32 [[MUL_I]] to double
// FINITEONLY-NEXT: [[DIV_I:%.*]] = fdiv nnan ninf contract double [[CONV_I]], [[Y]]
// FINITEONLY-NEXT: [[MUL8_I:%.*]] = fmul nnan ninf contract double [[__X1_0_I3]], [[DIV_I]]
// FINITEONLY-NEXT: [[SUB_I]] = fsub nnan ninf contract double [[MUL8_I]], [[__X0_0_I2]]
Expand Down Expand Up @@ -1854,7 +1854,7 @@ extern "C" __device__ float test_jnf(int x, float y) {
// APPROX-NEXT: [[__X1_0_I3:%.*]] = phi double [ [[SUB_I:%.*]], [[FOR_BODY_I]] ], [ [[CALL_I21_I]], [[IF_END4_I]] ]
// APPROX-NEXT: [[__X0_0_I2:%.*]] = phi double [ [[__X1_0_I3]], [[FOR_BODY_I]] ], [ [[CALL_I_I]], [[IF_END4_I]] ]
// APPROX-NEXT: [[MUL_I:%.*]] = shl nuw nsw i32 [[__I_0_I4]], 1
// APPROX-NEXT: [[CONV_I:%.*]] = sitofp i32 [[MUL_I]] to double
// APPROX-NEXT: [[CONV_I:%.*]] = uitofp nneg i32 [[MUL_I]] to double
// APPROX-NEXT: [[DIV_I:%.*]] = fdiv contract double [[CONV_I]], [[Y]]
// APPROX-NEXT: [[MUL8_I:%.*]] = fmul contract double [[__X1_0_I3]], [[DIV_I]]
// APPROX-NEXT: [[SUB_I]] = fsub contract double [[MUL8_I]], [[__X0_0_I2]]
Expand Down Expand Up @@ -4222,7 +4222,7 @@ extern "C" __device__ double test_y1(double x) {
// DEFAULT-NEXT: [[__X1_0_I3:%.*]] = phi float [ [[SUB_I:%.*]], [[FOR_BODY_I]] ], [ [[CALL_I21_I]], [[IF_END4_I]] ]
// DEFAULT-NEXT: [[__X0_0_I2:%.*]] = phi float [ [[__X1_0_I3]], [[FOR_BODY_I]] ], [ [[CALL_I_I]], [[IF_END4_I]] ]
// DEFAULT-NEXT: [[MUL_I:%.*]] = shl nuw nsw i32 [[__I_0_I4]], 1
// DEFAULT-NEXT: [[CONV_I:%.*]] = sitofp i32 [[MUL_I]] to float
// DEFAULT-NEXT: [[CONV_I:%.*]] = uitofp nneg i32 [[MUL_I]] to float
// DEFAULT-NEXT: [[DIV_I:%.*]] = fdiv contract float [[CONV_I]], [[Y]]
// DEFAULT-NEXT: [[MUL8_I:%.*]] = fmul contract float [[__X1_0_I3]], [[DIV_I]]
// DEFAULT-NEXT: [[SUB_I]] = fsub contract float [[MUL8_I]], [[__X0_0_I2]]
Expand Down Expand Up @@ -4255,7 +4255,7 @@ extern "C" __device__ double test_y1(double x) {
// FINITEONLY-NEXT: [[__X1_0_I3:%.*]] = phi float [ [[SUB_I:%.*]], [[FOR_BODY_I]] ], [ [[CALL_I21_I]], [[IF_END4_I]] ]
// FINITEONLY-NEXT: [[__X0_0_I2:%.*]] = phi float [ [[__X1_0_I3]], [[FOR_BODY_I]] ], [ [[CALL_I_I]], [[IF_END4_I]] ]
// FINITEONLY-NEXT: [[MUL_I:%.*]] = shl nuw nsw i32 [[__I_0_I4]], 1
// FINITEONLY-NEXT: [[CONV_I:%.*]] = sitofp i32 [[MUL_I]] to float
// FINITEONLY-NEXT: [[CONV_I:%.*]] = uitofp nneg i32 [[MUL_I]] to float
// FINITEONLY-NEXT: [[DIV_I:%.*]] = fdiv nnan ninf contract float [[CONV_I]], [[Y]]
// FINITEONLY-NEXT: [[MUL8_I:%.*]] = fmul nnan ninf contract float [[__X1_0_I3]], [[DIV_I]]
// FINITEONLY-NEXT: [[SUB_I]] = fsub nnan ninf contract float [[MUL8_I]], [[__X0_0_I2]]
Expand Down Expand Up @@ -4288,7 +4288,7 @@ extern "C" __device__ double test_y1(double x) {
// APPROX-NEXT: [[__X1_0_I3:%.*]] = phi float [ [[SUB_I:%.*]], [[FOR_BODY_I]] ], [ [[CALL_I21_I]], [[IF_END4_I]] ]
// APPROX-NEXT: [[__X0_0_I2:%.*]] = phi float [ [[__X1_0_I3]], [[FOR_BODY_I]] ], [ [[CALL_I_I]], [[IF_END4_I]] ]
// APPROX-NEXT: [[MUL_I:%.*]] = shl nuw nsw i32 [[__I_0_I4]], 1
// APPROX-NEXT: [[CONV_I:%.*]] = sitofp i32 [[MUL_I]] to float
// APPROX-NEXT: [[CONV_I:%.*]] = uitofp nneg i32 [[MUL_I]] to float
// APPROX-NEXT: [[DIV_I:%.*]] = fdiv contract float [[CONV_I]], [[Y]]
// APPROX-NEXT: [[MUL8_I:%.*]] = fmul contract float [[__X1_0_I3]], [[DIV_I]]
// APPROX-NEXT: [[SUB_I]] = fsub contract float [[MUL8_I]], [[__X0_0_I2]]
Expand Down Expand Up @@ -4325,7 +4325,7 @@ extern "C" __device__ float test_ynf(int x, float y) {
// DEFAULT-NEXT: [[__X1_0_I3:%.*]] = phi double [ [[SUB_I:%.*]], [[FOR_BODY_I]] ], [ [[CALL_I21_I]], [[IF_END4_I]] ]
// DEFAULT-NEXT: [[__X0_0_I2:%.*]] = phi double [ [[__X1_0_I3]], [[FOR_BODY_I]] ], [ [[CALL_I_I]], [[IF_END4_I]] ]
// DEFAULT-NEXT: [[MUL_I:%.*]] = shl nuw nsw i32 [[__I_0_I4]], 1
// DEFAULT-NEXT: [[CONV_I:%.*]] = sitofp i32 [[MUL_I]] to double
// DEFAULT-NEXT: [[CONV_I:%.*]] = uitofp nneg i32 [[MUL_I]] to double
// DEFAULT-NEXT: [[DIV_I:%.*]] = fdiv contract double [[CONV_I]], [[Y]]
// DEFAULT-NEXT: [[MUL8_I:%.*]] = fmul contract double [[__X1_0_I3]], [[DIV_I]]
// DEFAULT-NEXT: [[SUB_I]] = fsub contract double [[MUL8_I]], [[__X0_0_I2]]
Expand Down Expand Up @@ -4358,7 +4358,7 @@ extern "C" __device__ float test_ynf(int x, float y) {
// FINITEONLY-NEXT: [[__X1_0_I3:%.*]] = phi double [ [[SUB_I:%.*]], [[FOR_BODY_I]] ], [ [[CALL_I21_I]], [[IF_END4_I]] ]
// FINITEONLY-NEXT: [[__X0_0_I2:%.*]] = phi double [ [[__X1_0_I3]], [[FOR_BODY_I]] ], [ [[CALL_I_I]], [[IF_END4_I]] ]
// FINITEONLY-NEXT: [[MUL_I:%.*]] = shl nuw nsw i32 [[__I_0_I4]], 1
// FINITEONLY-NEXT: [[CONV_I:%.*]] = sitofp i32 [[MUL_I]] to double
// FINITEONLY-NEXT: [[CONV_I:%.*]] = uitofp nneg i32 [[MUL_I]] to double
// FINITEONLY-NEXT: [[DIV_I:%.*]] = fdiv nnan ninf contract double [[CONV_I]], [[Y]]
// FINITEONLY-NEXT: [[MUL8_I:%.*]] = fmul nnan ninf contract double [[__X1_0_I3]], [[DIV_I]]
// FINITEONLY-NEXT: [[SUB_I]] = fsub nnan ninf contract double [[MUL8_I]], [[__X0_0_I2]]
Expand Down Expand Up @@ -4391,7 +4391,7 @@ extern "C" __device__ float test_ynf(int x, float y) {
// APPROX-NEXT: [[__X1_0_I3:%.*]] = phi double [ [[SUB_I:%.*]], [[FOR_BODY_I]] ], [ [[CALL_I21_I]], [[IF_END4_I]] ]
// APPROX-NEXT: [[__X0_0_I2:%.*]] = phi double [ [[__X1_0_I3]], [[FOR_BODY_I]] ], [ [[CALL_I_I]], [[IF_END4_I]] ]
// APPROX-NEXT: [[MUL_I:%.*]] = shl nuw nsw i32 [[__I_0_I4]], 1
// APPROX-NEXT: [[CONV_I:%.*]] = sitofp i32 [[MUL_I]] to double
// APPROX-NEXT: [[CONV_I:%.*]] = uitofp nneg i32 [[MUL_I]] to double
// APPROX-NEXT: [[DIV_I:%.*]] = fdiv contract double [[CONV_I]], [[Y]]
// APPROX-NEXT: [[MUL8_I:%.*]] = fmul contract double [[__X1_0_I3]], [[DIV_I]]
// APPROX-NEXT: [[SUB_I]] = fsub contract double [[MUL8_I]], [[__X0_0_I2]]
Expand Down
18 changes: 16 additions & 2 deletions llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp
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Expand Up @@ -1964,11 +1964,25 @@ Instruction *InstCombinerImpl::visitFPToSI(FPToSIInst &FI) {
}

Instruction *InstCombinerImpl::visitUIToFP(CastInst &CI) {
return commonCastTransforms(CI);
if (Instruction *R = commonCastTransforms(CI))
return R;
if (!CI.hasNonNeg() && isKnownNonNegative(CI.getOperand(0), SQ)) {
CI.setNonNeg();
return &CI;
}
return nullptr;
}

Instruction *InstCombinerImpl::visitSIToFP(CastInst &CI) {
return commonCastTransforms(CI);
if (Instruction *R = commonCastTransforms(CI))
return R;
if (isKnownNonNegative(CI.getOperand(0), SQ)) {
auto UI =
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Suggested change
auto UI =
auto *UI =

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@goldsteinn We always use auto * for pointers.

https://llvm.org/docs/CodingStandards.html#beware-unnecessary-copies-with-auto

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My mistake, ill push a fix.

CastInst::Create(Instruction::UIToFP, CI.getOperand(0), CI.getType());
UI->setNonNeg(true);
return UI;
}
return nullptr;
}

Instruction *InstCombinerImpl::visitIntToPtr(IntToPtrInst &CI) {
Expand Down
20 changes: 10 additions & 10 deletions llvm/test/Transforms/InstCombine/add-sitofp.ll
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Expand Up @@ -6,7 +6,7 @@ define double @x(i32 %a, i32 %b) {
; CHECK-NEXT: [[M:%.*]] = lshr i32 [[A:%.*]], 24
; CHECK-NEXT: [[N:%.*]] = and i32 [[M]], [[B:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = add nuw nsw i32 [[N]], 1
; CHECK-NEXT: [[P:%.*]] = uitofp i32 [[TMP1]] to double
; CHECK-NEXT: [[P:%.*]] = uitofp nneg i32 [[TMP1]] to double
; CHECK-NEXT: ret double [[P]]
;
%m = lshr i32 %a, 24
Expand All @@ -20,7 +20,7 @@ define double @test(i32 %a) {
; CHECK-LABEL: @test(
; CHECK-NEXT: [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823
; CHECK-NEXT: [[TMP1:%.*]] = add nuw nsw i32 [[A_AND]], 1
; CHECK-NEXT: [[RES:%.*]] = uitofp i32 [[TMP1]] to double
; CHECK-NEXT: [[RES:%.*]] = uitofp nneg i32 [[TMP1]] to double
; CHECK-NEXT: ret double [[RES]]
;
; Drop two highest bits to guarantee that %a + 1 doesn't overflow
Expand All @@ -33,7 +33,7 @@ define double @test(i32 %a) {
define float @test_neg(i32 %a) {
; CHECK-LABEL: @test_neg(
; CHECK-NEXT: [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823
; CHECK-NEXT: [[A_AND_FP:%.*]] = sitofp i32 [[A_AND]] to float
; CHECK-NEXT: [[A_AND_FP:%.*]] = uitofp nneg i32 [[A_AND]] to float
; CHECK-NEXT: [[RES:%.*]] = fadd float [[A_AND_FP]], 1.000000e+00
; CHECK-NEXT: ret float [[RES]]
;
Expand All @@ -49,7 +49,7 @@ define double @test_2(i32 %a, i32 %b) {
; CHECK-NEXT: [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823
; CHECK-NEXT: [[B_AND:%.*]] = and i32 [[B:%.*]], 1073741823
; CHECK-NEXT: [[TMP1:%.*]] = add nuw nsw i32 [[A_AND]], [[B_AND]]
; CHECK-NEXT: [[RES:%.*]] = uitofp i32 [[TMP1]] to double
; CHECK-NEXT: [[RES:%.*]] = uitofp nneg i32 [[TMP1]] to double
; CHECK-NEXT: ret double [[RES]]
;
; Drop two highest bits to guarantee that %a + %b doesn't overflow
Expand All @@ -67,8 +67,8 @@ define float @test_2_neg(i32 %a, i32 %b) {
; CHECK-LABEL: @test_2_neg(
; CHECK-NEXT: [[A_AND:%.*]] = and i32 [[A:%.*]], 1073741823
; CHECK-NEXT: [[B_AND:%.*]] = and i32 [[B:%.*]], 1073741823
; CHECK-NEXT: [[A_AND_FP:%.*]] = sitofp i32 [[A_AND]] to float
; CHECK-NEXT: [[B_AND_FP:%.*]] = sitofp i32 [[B_AND]] to float
; CHECK-NEXT: [[A_AND_FP:%.*]] = uitofp nneg i32 [[A_AND]] to float
; CHECK-NEXT: [[B_AND_FP:%.*]] = uitofp nneg i32 [[B_AND]] to float
; CHECK-NEXT: [[RES:%.*]] = fadd float [[A_AND_FP]], [[B_AND_FP]]
; CHECK-NEXT: ret float [[RES]]
;
Expand All @@ -89,7 +89,7 @@ define float @test_3(i32 %a, i32 %b) {
; CHECK-NEXT: [[M:%.*]] = lshr i32 [[A:%.*]], 24
; CHECK-NEXT: [[N:%.*]] = and i32 [[M]], [[B:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = add nuw nsw i32 [[N]], 1
; CHECK-NEXT: [[P:%.*]] = uitofp i32 [[TMP1]] to float
; CHECK-NEXT: [[P:%.*]] = uitofp nneg i32 [[TMP1]] to float
; CHECK-NEXT: ret float [[P]]
;
%m = lshr i32 %a, 24
Expand All @@ -104,7 +104,7 @@ define <4 x double> @test_4(<4 x i32> %a, <4 x i32> %b) {
; CHECK-NEXT: [[A_AND:%.*]] = and <4 x i32> [[A:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
; CHECK-NEXT: [[B_AND:%.*]] = and <4 x i32> [[B:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
; CHECK-NEXT: [[TMP1:%.*]] = add nuw nsw <4 x i32> [[A_AND]], [[B_AND]]
; CHECK-NEXT: [[RES:%.*]] = uitofp <4 x i32> [[TMP1]] to <4 x double>
; CHECK-NEXT: [[RES:%.*]] = uitofp nneg <4 x i32> [[TMP1]] to <4 x double>
; CHECK-NEXT: ret <4 x double> [[RES]]
;
; Drop two highest bits to guarantee that %a + %b doesn't overflow
Expand All @@ -122,8 +122,8 @@ define <4 x float> @test_4_neg(<4 x i32> %a, <4 x i32> %b) {
; CHECK-LABEL: @test_4_neg(
; CHECK-NEXT: [[A_AND:%.*]] = and <4 x i32> [[A:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
; CHECK-NEXT: [[B_AND:%.*]] = and <4 x i32> [[B:%.*]], <i32 1073741823, i32 1073741823, i32 1073741823, i32 1073741823>
; CHECK-NEXT: [[A_AND_FP:%.*]] = sitofp <4 x i32> [[A_AND]] to <4 x float>
; CHECK-NEXT: [[B_AND_FP:%.*]] = sitofp <4 x i32> [[B_AND]] to <4 x float>
; CHECK-NEXT: [[A_AND_FP:%.*]] = uitofp nneg <4 x i32> [[A_AND]] to <4 x float>
; CHECK-NEXT: [[B_AND_FP:%.*]] = uitofp nneg <4 x i32> [[B_AND]] to <4 x float>
; CHECK-NEXT: [[RES:%.*]] = fadd <4 x float> [[A_AND_FP]], [[B_AND_FP]]
; CHECK-NEXT: ret <4 x float> [[RES]]
;
Expand Down
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