[llvm] [AMDGPU] Implement IR variant of isFMAFasterThanFMulAndFAdd (PR #121465)
Chinmay Deshpande via llvm-commits
llvm-commits at lists.llvm.org
Mon Jan 6 05:26:06 PST 2025
https://github.com/chinmaydd updated https://github.com/llvm/llvm-project/pull/121465
>From 3d97f5c76e08594e1d2112101f7bdab147af6ddf Mon Sep 17 00:00:00 2001
From: Chinmay Deshpande <ChinmayDiwakar.Deshpande at amd.com>
Date: Thu, 12 Dec 2024 23:51:39 -0500
Subject: [PATCH 1/2] [AMDGPU] Implement IR variant of
isFMAFasterThanFMulAndFAdd
Change-Id: I2484db303227da9aa53cc8842283c4ba6a332b3a
---
llvm/lib/Target/AMDGPU/SIISelLowering.cpp | 58 ++++++
llvm/lib/Target/AMDGPU/SIISelLowering.h | 3 +
.../AMDGPU/is-profitable-to-hoist-ir.ll | 185 ++++++++++++++++++
3 files changed, 246 insertions(+)
create mode 100644 llvm/test/CodeGen/AMDGPU/is-profitable-to-hoist-ir.ll
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
index b3cfa398d9b5f6..5d82b7021b6cef 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
@@ -5731,6 +5731,33 @@ bool SITargetLowering::isFMAFasterThanFMulAndFAdd(const MachineFunction &MF,
return false;
}
+// Refer to comments added to the MIR variant of isFMAFasterThanFMulAndFAdd for
+// specific details.
+bool SITargetLowering::isFMAFasterThanFMulAndFAdd(const Function &F,
+ Type *Ty) const {
+ SIModeRegisterDefaults Mode = SIModeRegisterDefaults(F, *Subtarget);
+ switch (Ty->getScalarSizeInBits()) {
+ case 32: {
+ if (!Subtarget->hasMadMacF32Insts())
+ return Subtarget->hasFastFMAF32();
+
+ if (Mode.FP32Denormals != DenormalMode::getPreserveSign())
+ return Subtarget->hasFastFMAF32() || Subtarget->hasDLInsts();
+
+ return Subtarget->hasFastFMAF32() && Subtarget->hasDLInsts();
+ }
+ case 64:
+ return true;
+ case 16:
+ return Subtarget->has16BitInsts() &&
+ Mode.FP64FP16Denormals != DenormalMode::getPreserveSign();
+ default:
+ break;
+ }
+
+ return false;
+}
+
bool SITargetLowering::isFMADLegal(const MachineInstr &MI, LLT Ty) const {
if (!Ty.isScalar())
return false;
@@ -16945,6 +16972,37 @@ bool SITargetLowering::checkForPhysRegDependency(
return false;
}
+/// Check if it is profitable to hoist instruction in then/else to if.
+/// Not profitable if I and it's user can form a FMA instruction
+/// because we prefer FMSUB/FMADD.
+bool SITargetLowering::isProfitableToHoist(Instruction *I) const {
+ if (!I->hasOneUse())
+ return true;
+
+ Instruction *User = I->user_back();
+ // TODO: Add more patterns that are not profitable to hoist
+ switch (I->getOpcode()) {
+ case Instruction::FMul: {
+ if (User->getOpcode() != Instruction::FSub &&
+ User->getOpcode() != Instruction::FAdd)
+ return true;
+
+ const TargetOptions &Options = getTargetMachine().Options;
+ const Function *F = I->getFunction();
+ const DataLayout &DL = F->getDataLayout();
+ Type *Ty = User->getOperand(0)->getType();
+
+ return !isOperationLegalOrCustom(ISD::FMA, getValueType(DL, Ty)) ||
+ (Options.AllowFPOpFusion != FPOpFusion::Fast &&
+ !Options.UnsafeFPMath) ||
+ !isFMAFasterThanFMulAndFAdd(*F, Ty);
+ }
+ default:
+ return true;
+ }
+ return true;
+}
+
void SITargetLowering::emitExpandAtomicAddrSpacePredicate(
Instruction *AI) const {
// Given: atomicrmw fadd ptr %addr, float %val ordering
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.h b/llvm/lib/Target/AMDGPU/SIISelLowering.h
index f4641e7a659907..d7bb03f25fc02c 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.h
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.h
@@ -456,6 +456,7 @@ class SITargetLowering final : public AMDGPUTargetLowering {
EVT VT) const override;
bool isFMAFasterThanFMulAndFAdd(const MachineFunction &MF,
const LLT Ty) const override;
+ bool isFMAFasterThanFMulAndFAdd(const Function &F, Type *Ty) const override;
bool isFMADLegal(const SelectionDAG &DAG, const SDNode *N) const override;
bool isFMADLegal(const MachineInstr &MI, const LLT Ty) const override;
@@ -535,6 +536,8 @@ class SITargetLowering final : public AMDGPUTargetLowering {
const TargetInstrInfo *TII, unsigned &PhysReg,
int &Cost) const override;
+ bool isProfitableToHoist(Instruction *I) const override;
+
bool isKnownNeverNaNForTargetNode(SDValue Op,
const SelectionDAG &DAG,
bool SNaN = false,
diff --git a/llvm/test/CodeGen/AMDGPU/is-profitable-to-hoist-ir.ll b/llvm/test/CodeGen/AMDGPU/is-profitable-to-hoist-ir.ll
new file mode 100644
index 00000000000000..3c204fda38d458
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/is-profitable-to-hoist-ir.ll
@@ -0,0 +1,185 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt -S -passes=simplifycfg -verify-machineinstrs -hoist-common-insts=true -mtriple=amdgcn-- -mcpu=gfx1030 -fp-contract=fast < %s | FileCheck -check-prefix=GFX -check-prefix=GFX-FP-CONTRACT %s
+; RUN: opt -S -passes=simplifycfg -verify-machineinstrs -hoist-common-insts=true -mtriple=amdgcn-- -mcpu=gfx1030 -enable-unsafe-fp-math --denormal-fp-math=ieee < %s | FileCheck -check-prefix=GFX -check-prefix=GFX-UNSAFE-FP-IEEE %s
+; RUN: opt -S -passes=simplifycfg -verify-machineinstrs -hoist-common-insts=true -mtriple=amdgcn-- -mcpu=gfx1030 -enable-unsafe-fp-math --denormal-fp-math=preserve-sign < %s | FileCheck -check-prefix=GFX -check-prefix=GFX-UNSAFE-FP-PRESERVE %s
+
+define double @_branch(ptr dereferenceable(8) %x, ptr dereferenceable(8) %y, ptr dereferenceable(8) %a) #0 {
+; GFX-LABEL: define double @_branch(
+; GFX-SAME: ptr dereferenceable(8) [[X:%.*]], ptr dereferenceable(8) [[Y:%.*]], ptr dereferenceable(8) [[A:%.*]]) #[[ATTR0:[0-9]+]] {
+; GFX-NEXT: [[ENTRY:.*:]]
+; GFX-NEXT: [[TMP0:%.*]] = load double, ptr [[Y]], align 8
+; GFX-NEXT: [[CMP:%.*]] = fcmp oeq double [[TMP0]], 0.000000e+00
+; GFX-NEXT: [[TMP1:%.*]] = load double, ptr [[X]], align 8
+; GFX-NEXT: [[TMP2:%.*]] = load double, ptr [[A]], align 8
+; GFX-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; GFX: [[COMMON_RET:.*]]:
+; GFX-NEXT: [[COMMON_RET_OP:%.*]] = phi double [ [[MUL:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; GFX-NEXT: ret double [[COMMON_RET_OP]]
+; GFX: [[IF_THEN]]:
+; GFX-NEXT: [[MUL]] = fmul fast double [[TMP1]], [[TMP2]]
+; GFX-NEXT: [[ADD:%.*]] = fadd fast double 1.000000e+00, [[MUL]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+; GFX: [[IF_ELSE]]:
+; GFX-NEXT: [[MUL1:%.*]] = fmul fast double [[TMP1]], [[TMP2]]
+; GFX-NEXT: [[SUB]] = fsub fast double [[MUL1]], [[TMP0]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+;
+entry:
+ %0 = load double, ptr %y, align 8
+ %cmp = fcmp oeq double %0, 0.000000e+00
+ %1 = load double, ptr %x, align 8
+ br i1 %cmp, label %if.then, label %if.else
+
+if.then: ; preds = %entry
+ %2 = load double, ptr %a, align 8
+ %mul = fmul fast double %1, %2
+ %add = fadd fast double 1.000000e+00, %mul
+ ret double %mul
+
+if.else: ; preds = %entry
+ %3 = load double, ptr %a, align 8
+ %mul1 = fmul fast double %1, %3
+ %sub = fsub fast double %mul1, %0
+ ret double %sub
+}
+
+define float @_branch2(ptr dereferenceable(8) %x, ptr dereferenceable(8) %y, ptr dereferenceable(8) %a) #0 {
+; GFX-LABEL: define float @_branch2(
+; GFX-SAME: ptr dereferenceable(8) [[X:%.*]], ptr dereferenceable(8) [[Y:%.*]], ptr dereferenceable(8) [[A:%.*]]) #[[ATTR0]] {
+; GFX-NEXT: [[ENTRY:.*:]]
+; GFX-NEXT: [[TMP0:%.*]] = load float, ptr [[Y]], align 8
+; GFX-NEXT: [[CMP:%.*]] = fcmp oeq float [[TMP0]], 0.000000e+00
+; GFX-NEXT: [[TMP1:%.*]] = load float, ptr [[X]], align 8
+; GFX-NEXT: [[TMP2:%.*]] = load float, ptr [[A]], align 8
+; GFX-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; GFX: [[COMMON_RET:.*]]:
+; GFX-NEXT: [[COMMON_RET_OP:%.*]] = phi float [ [[MUL:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; GFX-NEXT: ret float [[COMMON_RET_OP]]
+; GFX: [[IF_THEN]]:
+; GFX-NEXT: [[MUL]] = fmul fast float [[TMP1]], [[TMP2]]
+; GFX-NEXT: [[ADD:%.*]] = fadd fast float 1.000000e+00, [[MUL]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+; GFX: [[IF_ELSE]]:
+; GFX-NEXT: [[MUL1:%.*]] = fmul fast float [[TMP1]], [[TMP2]]
+; GFX-NEXT: [[SUB]] = fsub fast float [[MUL1]], [[TMP0]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+;
+entry:
+ %0 = load float, ptr %y, align 8
+ %cmp = fcmp oeq float %0, 0.000000e+00
+ %1 = load float, ptr %x, align 8
+ br i1 %cmp, label %if.then, label %if.else
+
+
+if.then: ; preds = %entry
+ %2 = load float, ptr %a, align 8
+ %mul = fmul fast float %1, %2
+ %add = fadd fast float 1.000000e+00, %mul
+ ret float %mul
+
+if.else: ; preds = %entry
+ %3 = load float, ptr %a, align 8
+ %mul1 = fmul fast float %1, %3
+ %sub = fsub fast float %mul1, %0
+ ret float %sub
+}
+
+define half @_branch3(ptr dereferenceable(8) %x, ptr dereferenceable(8) %y, ptr dereferenceable(8) %a) #0 {
+; GFX-CONTRACT-LABEL: define half @_branchr32(
+; GFX-CONTRACT-SAME: ptr dereferenceable(8) [[X:%.*]], ptr dereferenceable(8) [[Y:%.*]], ptr dereferenceable(8) [[A:%.*]]) #[[ATTR0]] {
+; GFX-CONTRACT-NEXT: [[ENTRY:.*:]]
+; GFX-CONTRACT-NEXT: [[TMP0:%.*]] = load half, ptr [[Y]], align 8
+; GFX-CONTRACT-NEXT: [[CMP:%.*]] = fcmp oeq half [[TMP0]], 0xH0000
+; GFX-CONTRACT-NEXT: [[TMP1:%.*]] = load half, ptr [[X]], align 8
+; GFX-CONTRACT-NEXT: [[TMP2:%.*]] = load half, ptr [[A]], align 8
+; GFX-CONTRACT-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; GFX-CONTRACT: [[COMMON_RET:.*]]:
+; GFX-CONTRACT-NEXT: [[COMMON_RET_OP:%.*]] = phi half [ [[MUL:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; GFX-CONTRACT-NEXT: ret half [[COMMON_RET_OP]]
+; GFX-CONTRACT: [[IF_THEN]]:
+; GFX-CONTRACT-NEXT: [[MUL]] = fmul fast half [[TMP1]], [[TMP2]]
+; GFX-CONTRACT-NEXT: [[ADD:%.*]] = fadd fast half 0xH3C00, [[MUL]]
+; GFX-CONTRACT-NEXT: br label %[[COMMON_RET]]
+; GFX-CONTRACT: [[IF_ELSE]]:
+; GFX-CONTRACT-NEXT: [[MUL1:%.*]] = fmul fast half [[TMP1]], [[TMP2]]
+; GFX-CONTRACT-NEXT: [[SUB]] = fsub fast half [[MUL1]], [[TMP0]]
+; GFX-CONTRACT-NEXT: br label %[[COMMON_RET]]
+;
+; GFX-FP-CONTRACT-LABEL: define half @_branch3(
+; GFX-FP-CONTRACT-SAME: ptr dereferenceable(8) [[X:%.*]], ptr dereferenceable(8) [[Y:%.*]], ptr dereferenceable(8) [[A:%.*]]) #[[ATTR0]] {
+; GFX-FP-CONTRACT-NEXT: [[ENTRY:.*:]]
+; GFX-FP-CONTRACT-NEXT: [[TMP0:%.*]] = load half, ptr [[Y]], align 8
+; GFX-FP-CONTRACT-NEXT: [[CMP:%.*]] = fcmp oeq half [[TMP0]], 0xH0000
+; GFX-FP-CONTRACT-NEXT: [[TMP1:%.*]] = load half, ptr [[X]], align 8
+; GFX-FP-CONTRACT-NEXT: [[TMP2:%.*]] = load half, ptr [[A]], align 8
+; GFX-FP-CONTRACT-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; GFX-FP-CONTRACT: [[COMMON_RET:.*]]:
+; GFX-FP-CONTRACT-NEXT: [[COMMON_RET_OP:%.*]] = phi half [ [[MUL:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; GFX-FP-CONTRACT-NEXT: ret half [[COMMON_RET_OP]]
+; GFX-FP-CONTRACT: [[IF_THEN]]:
+; GFX-FP-CONTRACT-NEXT: [[MUL]] = fmul fast half [[TMP1]], [[TMP2]]
+; GFX-FP-CONTRACT-NEXT: [[ADD:%.*]] = fadd fast half 0xH3C00, [[MUL]]
+; GFX-FP-CONTRACT-NEXT: br label %[[COMMON_RET]]
+; GFX-FP-CONTRACT: [[IF_ELSE]]:
+; GFX-FP-CONTRACT-NEXT: [[MUL1:%.*]] = fmul fast half [[TMP1]], [[TMP2]]
+; GFX-FP-CONTRACT-NEXT: [[SUB]] = fsub fast half [[MUL1]], [[TMP0]]
+; GFX-FP-CONTRACT-NEXT: br label %[[COMMON_RET]]
+;
+; GFX-UNSAFE-FP-IEEE-LABEL: define half @_branch3(
+; GFX-UNSAFE-FP-IEEE-SAME: ptr dereferenceable(8) [[X:%.*]], ptr dereferenceable(8) [[Y:%.*]], ptr dereferenceable(8) [[A:%.*]]) #[[ATTR0]] {
+; GFX-UNSAFE-FP-IEEE-NEXT: [[ENTRY:.*:]]
+; GFX-UNSAFE-FP-IEEE-NEXT: [[TMP0:%.*]] = load half, ptr [[Y]], align 8
+; GFX-UNSAFE-FP-IEEE-NEXT: [[CMP:%.*]] = fcmp oeq half [[TMP0]], 0xH0000
+; GFX-UNSAFE-FP-IEEE-NEXT: [[TMP1:%.*]] = load half, ptr [[X]], align 8
+; GFX-UNSAFE-FP-IEEE-NEXT: [[TMP2:%.*]] = load half, ptr [[A]], align 8
+; GFX-UNSAFE-FP-IEEE-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; GFX-UNSAFE-FP-IEEE: [[COMMON_RET:.*]]:
+; GFX-UNSAFE-FP-IEEE-NEXT: [[COMMON_RET_OP:%.*]] = phi half [ [[MUL:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; GFX-UNSAFE-FP-IEEE-NEXT: ret half [[COMMON_RET_OP]]
+; GFX-UNSAFE-FP-IEEE: [[IF_THEN]]:
+; GFX-UNSAFE-FP-IEEE-NEXT: [[MUL]] = fmul fast half [[TMP1]], [[TMP2]]
+; GFX-UNSAFE-FP-IEEE-NEXT: [[ADD:%.*]] = fadd fast half 0xH3C00, [[MUL]]
+; GFX-UNSAFE-FP-IEEE-NEXT: br label %[[COMMON_RET]]
+; GFX-UNSAFE-FP-IEEE: [[IF_ELSE]]:
+; GFX-UNSAFE-FP-IEEE-NEXT: [[MUL1:%.*]] = fmul fast half [[TMP1]], [[TMP2]]
+; GFX-UNSAFE-FP-IEEE-NEXT: [[SUB]] = fsub fast half [[MUL1]], [[TMP0]]
+; GFX-UNSAFE-FP-IEEE-NEXT: br label %[[COMMON_RET]]
+;
+; GFX-UNSAFE-FP-PRESERVE-LABEL: define half @_branch3(
+; GFX-UNSAFE-FP-PRESERVE-SAME: ptr dereferenceable(8) [[X:%.*]], ptr dereferenceable(8) [[Y:%.*]], ptr dereferenceable(8) [[A:%.*]]) #[[ATTR0]] {
+; GFX-UNSAFE-FP-PRESERVE-NEXT: [[ENTRY:.*:]]
+; GFX-UNSAFE-FP-PRESERVE-NEXT: [[TMP0:%.*]] = load half, ptr [[Y]], align 8
+; GFX-UNSAFE-FP-PRESERVE-NEXT: [[CMP:%.*]] = fcmp oeq half [[TMP0]], 0xH0000
+; GFX-UNSAFE-FP-PRESERVE-NEXT: [[TMP1:%.*]] = load half, ptr [[X]], align 8
+; GFX-UNSAFE-FP-PRESERVE-NEXT: [[TMP2:%.*]] = load half, ptr [[A]], align 8
+; GFX-UNSAFE-FP-PRESERVE-NEXT: [[MUL:%.*]] = fmul fast half [[TMP1]], [[TMP2]]
+; GFX-UNSAFE-FP-PRESERVE-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; GFX-UNSAFE-FP-PRESERVE: [[COMMON_RET:.*]]:
+; GFX-UNSAFE-FP-PRESERVE-NEXT: [[COMMON_RET_OP:%.*]] = phi half [ [[MUL]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; GFX-UNSAFE-FP-PRESERVE-NEXT: ret half [[COMMON_RET_OP]]
+; GFX-UNSAFE-FP-PRESERVE: [[IF_THEN]]:
+; GFX-UNSAFE-FP-PRESERVE-NEXT: [[ADD:%.*]] = fadd fast half 0xH3C00, [[MUL]]
+; GFX-UNSAFE-FP-PRESERVE-NEXT: br label %[[COMMON_RET]]
+; GFX-UNSAFE-FP-PRESERVE: [[IF_ELSE]]:
+; GFX-UNSAFE-FP-PRESERVE-NEXT: [[SUB]] = fsub fast half [[MUL]], [[TMP0]]
+; GFX-UNSAFE-FP-PRESERVE-NEXT: br label %[[COMMON_RET]]
+;
+entry:
+ %0 = load half, ptr %y, align 8
+ %cmp = fcmp oeq half %0, 0.000000e+00
+ %1 = load half, ptr %x, align 8
+ br i1 %cmp, label %if.then, label %if.else
+
+if.then: ; preds = %entry
+ %2 = load half, ptr %a, align 8
+ %mul = fmul fast half %1, %2
+ %add = fadd fast half 1.000000e+00, %mul
+ ret half %mul
+
+if.else: ; preds = %entry
+ %3 = load half, ptr %a, align 8
+ %mul1 = fmul fast half %1, %3
+ %sub = fsub fast half %mul1, %0
+ ret half %sub
+}
+
>From f0ede1074c379d3e4f0a61bb41677cd52fc27319 Mon Sep 17 00:00:00 2001
From: Chinmay Deshpande <ChinmayDiwakar.Deshpande at amd.com>
Date: Fri, 3 Jan 2025 06:56:12 -0500
Subject: [PATCH 2/2] [AMDGPU] Incorporate feedback
Change-Id: I12e23d6a9506a6ce6e87fdf2292b4d4f2d88c258
---
llvm/lib/Target/AMDGPU/SIISelLowering.cpp | 16 +-
.../AMDGPU/is-profitable-to-hoist-ir.ll | 185 --------
.../CodeGen/AMDGPU/prevent-fmul-hoist-ir.ll | 447 ++++++++++++++++++
3 files changed, 454 insertions(+), 194 deletions(-)
delete mode 100644 llvm/test/CodeGen/AMDGPU/is-profitable-to-hoist-ir.ll
create mode 100644 llvm/test/CodeGen/AMDGPU/prevent-fmul-hoist-ir.ll
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
index 5d82b7021b6cef..c6d83065fd00f7 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
@@ -5735,12 +5735,12 @@ bool SITargetLowering::isFMAFasterThanFMulAndFAdd(const MachineFunction &MF,
// specific details.
bool SITargetLowering::isFMAFasterThanFMulAndFAdd(const Function &F,
Type *Ty) const {
- SIModeRegisterDefaults Mode = SIModeRegisterDefaults(F, *Subtarget);
switch (Ty->getScalarSizeInBits()) {
case 32: {
if (!Subtarget->hasMadMacF32Insts())
return Subtarget->hasFastFMAF32();
+ SIModeRegisterDefaults Mode = SIModeRegisterDefaults(F, *Subtarget);
if (Mode.FP32Denormals != DenormalMode::getPreserveSign())
return Subtarget->hasFastFMAF32() || Subtarget->hasDLInsts();
@@ -5748,9 +5748,11 @@ bool SITargetLowering::isFMAFasterThanFMulAndFAdd(const Function &F,
}
case 64:
return true;
- case 16:
+ case 16: {
+ SIModeRegisterDefaults Mode = SIModeRegisterDefaults(F, *Subtarget);
return Subtarget->has16BitInsts() &&
Mode.FP64FP16Denormals != DenormalMode::getPreserveSign();
+ }
default:
break;
}
@@ -16973,8 +16975,6 @@ bool SITargetLowering::checkForPhysRegDependency(
}
/// Check if it is profitable to hoist instruction in then/else to if.
-/// Not profitable if I and it's user can form a FMA instruction
-/// because we prefer FMSUB/FMADD.
bool SITargetLowering::isProfitableToHoist(Instruction *I) const {
if (!I->hasOneUse())
return true;
@@ -16989,13 +16989,11 @@ bool SITargetLowering::isProfitableToHoist(Instruction *I) const {
const TargetOptions &Options = getTargetMachine().Options;
const Function *F = I->getFunction();
- const DataLayout &DL = F->getDataLayout();
- Type *Ty = User->getOperand(0)->getType();
- return !isOperationLegalOrCustom(ISD::FMA, getValueType(DL, Ty)) ||
- (Options.AllowFPOpFusion != FPOpFusion::Fast &&
+ return ((!I->hasAllowContract() || !User->hasAllowContract()) &&
+ Options.AllowFPOpFusion != FPOpFusion::Fast &&
!Options.UnsafeFPMath) ||
- !isFMAFasterThanFMulAndFAdd(*F, Ty);
+ !isFMAFasterThanFMulAndFAdd(*F, User->getType());
}
default:
return true;
diff --git a/llvm/test/CodeGen/AMDGPU/is-profitable-to-hoist-ir.ll b/llvm/test/CodeGen/AMDGPU/is-profitable-to-hoist-ir.ll
deleted file mode 100644
index 3c204fda38d458..00000000000000
--- a/llvm/test/CodeGen/AMDGPU/is-profitable-to-hoist-ir.ll
+++ /dev/null
@@ -1,185 +0,0 @@
-; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
-; RUN: opt -S -passes=simplifycfg -verify-machineinstrs -hoist-common-insts=true -mtriple=amdgcn-- -mcpu=gfx1030 -fp-contract=fast < %s | FileCheck -check-prefix=GFX -check-prefix=GFX-FP-CONTRACT %s
-; RUN: opt -S -passes=simplifycfg -verify-machineinstrs -hoist-common-insts=true -mtriple=amdgcn-- -mcpu=gfx1030 -enable-unsafe-fp-math --denormal-fp-math=ieee < %s | FileCheck -check-prefix=GFX -check-prefix=GFX-UNSAFE-FP-IEEE %s
-; RUN: opt -S -passes=simplifycfg -verify-machineinstrs -hoist-common-insts=true -mtriple=amdgcn-- -mcpu=gfx1030 -enable-unsafe-fp-math --denormal-fp-math=preserve-sign < %s | FileCheck -check-prefix=GFX -check-prefix=GFX-UNSAFE-FP-PRESERVE %s
-
-define double @_branch(ptr dereferenceable(8) %x, ptr dereferenceable(8) %y, ptr dereferenceable(8) %a) #0 {
-; GFX-LABEL: define double @_branch(
-; GFX-SAME: ptr dereferenceable(8) [[X:%.*]], ptr dereferenceable(8) [[Y:%.*]], ptr dereferenceable(8) [[A:%.*]]) #[[ATTR0:[0-9]+]] {
-; GFX-NEXT: [[ENTRY:.*:]]
-; GFX-NEXT: [[TMP0:%.*]] = load double, ptr [[Y]], align 8
-; GFX-NEXT: [[CMP:%.*]] = fcmp oeq double [[TMP0]], 0.000000e+00
-; GFX-NEXT: [[TMP1:%.*]] = load double, ptr [[X]], align 8
-; GFX-NEXT: [[TMP2:%.*]] = load double, ptr [[A]], align 8
-; GFX-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
-; GFX: [[COMMON_RET:.*]]:
-; GFX-NEXT: [[COMMON_RET_OP:%.*]] = phi double [ [[MUL:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
-; GFX-NEXT: ret double [[COMMON_RET_OP]]
-; GFX: [[IF_THEN]]:
-; GFX-NEXT: [[MUL]] = fmul fast double [[TMP1]], [[TMP2]]
-; GFX-NEXT: [[ADD:%.*]] = fadd fast double 1.000000e+00, [[MUL]]
-; GFX-NEXT: br label %[[COMMON_RET]]
-; GFX: [[IF_ELSE]]:
-; GFX-NEXT: [[MUL1:%.*]] = fmul fast double [[TMP1]], [[TMP2]]
-; GFX-NEXT: [[SUB]] = fsub fast double [[MUL1]], [[TMP0]]
-; GFX-NEXT: br label %[[COMMON_RET]]
-;
-entry:
- %0 = load double, ptr %y, align 8
- %cmp = fcmp oeq double %0, 0.000000e+00
- %1 = load double, ptr %x, align 8
- br i1 %cmp, label %if.then, label %if.else
-
-if.then: ; preds = %entry
- %2 = load double, ptr %a, align 8
- %mul = fmul fast double %1, %2
- %add = fadd fast double 1.000000e+00, %mul
- ret double %mul
-
-if.else: ; preds = %entry
- %3 = load double, ptr %a, align 8
- %mul1 = fmul fast double %1, %3
- %sub = fsub fast double %mul1, %0
- ret double %sub
-}
-
-define float @_branch2(ptr dereferenceable(8) %x, ptr dereferenceable(8) %y, ptr dereferenceable(8) %a) #0 {
-; GFX-LABEL: define float @_branch2(
-; GFX-SAME: ptr dereferenceable(8) [[X:%.*]], ptr dereferenceable(8) [[Y:%.*]], ptr dereferenceable(8) [[A:%.*]]) #[[ATTR0]] {
-; GFX-NEXT: [[ENTRY:.*:]]
-; GFX-NEXT: [[TMP0:%.*]] = load float, ptr [[Y]], align 8
-; GFX-NEXT: [[CMP:%.*]] = fcmp oeq float [[TMP0]], 0.000000e+00
-; GFX-NEXT: [[TMP1:%.*]] = load float, ptr [[X]], align 8
-; GFX-NEXT: [[TMP2:%.*]] = load float, ptr [[A]], align 8
-; GFX-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
-; GFX: [[COMMON_RET:.*]]:
-; GFX-NEXT: [[COMMON_RET_OP:%.*]] = phi float [ [[MUL:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
-; GFX-NEXT: ret float [[COMMON_RET_OP]]
-; GFX: [[IF_THEN]]:
-; GFX-NEXT: [[MUL]] = fmul fast float [[TMP1]], [[TMP2]]
-; GFX-NEXT: [[ADD:%.*]] = fadd fast float 1.000000e+00, [[MUL]]
-; GFX-NEXT: br label %[[COMMON_RET]]
-; GFX: [[IF_ELSE]]:
-; GFX-NEXT: [[MUL1:%.*]] = fmul fast float [[TMP1]], [[TMP2]]
-; GFX-NEXT: [[SUB]] = fsub fast float [[MUL1]], [[TMP0]]
-; GFX-NEXT: br label %[[COMMON_RET]]
-;
-entry:
- %0 = load float, ptr %y, align 8
- %cmp = fcmp oeq float %0, 0.000000e+00
- %1 = load float, ptr %x, align 8
- br i1 %cmp, label %if.then, label %if.else
-
-
-if.then: ; preds = %entry
- %2 = load float, ptr %a, align 8
- %mul = fmul fast float %1, %2
- %add = fadd fast float 1.000000e+00, %mul
- ret float %mul
-
-if.else: ; preds = %entry
- %3 = load float, ptr %a, align 8
- %mul1 = fmul fast float %1, %3
- %sub = fsub fast float %mul1, %0
- ret float %sub
-}
-
-define half @_branch3(ptr dereferenceable(8) %x, ptr dereferenceable(8) %y, ptr dereferenceable(8) %a) #0 {
-; GFX-CONTRACT-LABEL: define half @_branchr32(
-; GFX-CONTRACT-SAME: ptr dereferenceable(8) [[X:%.*]], ptr dereferenceable(8) [[Y:%.*]], ptr dereferenceable(8) [[A:%.*]]) #[[ATTR0]] {
-; GFX-CONTRACT-NEXT: [[ENTRY:.*:]]
-; GFX-CONTRACT-NEXT: [[TMP0:%.*]] = load half, ptr [[Y]], align 8
-; GFX-CONTRACT-NEXT: [[CMP:%.*]] = fcmp oeq half [[TMP0]], 0xH0000
-; GFX-CONTRACT-NEXT: [[TMP1:%.*]] = load half, ptr [[X]], align 8
-; GFX-CONTRACT-NEXT: [[TMP2:%.*]] = load half, ptr [[A]], align 8
-; GFX-CONTRACT-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
-; GFX-CONTRACT: [[COMMON_RET:.*]]:
-; GFX-CONTRACT-NEXT: [[COMMON_RET_OP:%.*]] = phi half [ [[MUL:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
-; GFX-CONTRACT-NEXT: ret half [[COMMON_RET_OP]]
-; GFX-CONTRACT: [[IF_THEN]]:
-; GFX-CONTRACT-NEXT: [[MUL]] = fmul fast half [[TMP1]], [[TMP2]]
-; GFX-CONTRACT-NEXT: [[ADD:%.*]] = fadd fast half 0xH3C00, [[MUL]]
-; GFX-CONTRACT-NEXT: br label %[[COMMON_RET]]
-; GFX-CONTRACT: [[IF_ELSE]]:
-; GFX-CONTRACT-NEXT: [[MUL1:%.*]] = fmul fast half [[TMP1]], [[TMP2]]
-; GFX-CONTRACT-NEXT: [[SUB]] = fsub fast half [[MUL1]], [[TMP0]]
-; GFX-CONTRACT-NEXT: br label %[[COMMON_RET]]
-;
-; GFX-FP-CONTRACT-LABEL: define half @_branch3(
-; GFX-FP-CONTRACT-SAME: ptr dereferenceable(8) [[X:%.*]], ptr dereferenceable(8) [[Y:%.*]], ptr dereferenceable(8) [[A:%.*]]) #[[ATTR0]] {
-; GFX-FP-CONTRACT-NEXT: [[ENTRY:.*:]]
-; GFX-FP-CONTRACT-NEXT: [[TMP0:%.*]] = load half, ptr [[Y]], align 8
-; GFX-FP-CONTRACT-NEXT: [[CMP:%.*]] = fcmp oeq half [[TMP0]], 0xH0000
-; GFX-FP-CONTRACT-NEXT: [[TMP1:%.*]] = load half, ptr [[X]], align 8
-; GFX-FP-CONTRACT-NEXT: [[TMP2:%.*]] = load half, ptr [[A]], align 8
-; GFX-FP-CONTRACT-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
-; GFX-FP-CONTRACT: [[COMMON_RET:.*]]:
-; GFX-FP-CONTRACT-NEXT: [[COMMON_RET_OP:%.*]] = phi half [ [[MUL:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
-; GFX-FP-CONTRACT-NEXT: ret half [[COMMON_RET_OP]]
-; GFX-FP-CONTRACT: [[IF_THEN]]:
-; GFX-FP-CONTRACT-NEXT: [[MUL]] = fmul fast half [[TMP1]], [[TMP2]]
-; GFX-FP-CONTRACT-NEXT: [[ADD:%.*]] = fadd fast half 0xH3C00, [[MUL]]
-; GFX-FP-CONTRACT-NEXT: br label %[[COMMON_RET]]
-; GFX-FP-CONTRACT: [[IF_ELSE]]:
-; GFX-FP-CONTRACT-NEXT: [[MUL1:%.*]] = fmul fast half [[TMP1]], [[TMP2]]
-; GFX-FP-CONTRACT-NEXT: [[SUB]] = fsub fast half [[MUL1]], [[TMP0]]
-; GFX-FP-CONTRACT-NEXT: br label %[[COMMON_RET]]
-;
-; GFX-UNSAFE-FP-IEEE-LABEL: define half @_branch3(
-; GFX-UNSAFE-FP-IEEE-SAME: ptr dereferenceable(8) [[X:%.*]], ptr dereferenceable(8) [[Y:%.*]], ptr dereferenceable(8) [[A:%.*]]) #[[ATTR0]] {
-; GFX-UNSAFE-FP-IEEE-NEXT: [[ENTRY:.*:]]
-; GFX-UNSAFE-FP-IEEE-NEXT: [[TMP0:%.*]] = load half, ptr [[Y]], align 8
-; GFX-UNSAFE-FP-IEEE-NEXT: [[CMP:%.*]] = fcmp oeq half [[TMP0]], 0xH0000
-; GFX-UNSAFE-FP-IEEE-NEXT: [[TMP1:%.*]] = load half, ptr [[X]], align 8
-; GFX-UNSAFE-FP-IEEE-NEXT: [[TMP2:%.*]] = load half, ptr [[A]], align 8
-; GFX-UNSAFE-FP-IEEE-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
-; GFX-UNSAFE-FP-IEEE: [[COMMON_RET:.*]]:
-; GFX-UNSAFE-FP-IEEE-NEXT: [[COMMON_RET_OP:%.*]] = phi half [ [[MUL:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
-; GFX-UNSAFE-FP-IEEE-NEXT: ret half [[COMMON_RET_OP]]
-; GFX-UNSAFE-FP-IEEE: [[IF_THEN]]:
-; GFX-UNSAFE-FP-IEEE-NEXT: [[MUL]] = fmul fast half [[TMP1]], [[TMP2]]
-; GFX-UNSAFE-FP-IEEE-NEXT: [[ADD:%.*]] = fadd fast half 0xH3C00, [[MUL]]
-; GFX-UNSAFE-FP-IEEE-NEXT: br label %[[COMMON_RET]]
-; GFX-UNSAFE-FP-IEEE: [[IF_ELSE]]:
-; GFX-UNSAFE-FP-IEEE-NEXT: [[MUL1:%.*]] = fmul fast half [[TMP1]], [[TMP2]]
-; GFX-UNSAFE-FP-IEEE-NEXT: [[SUB]] = fsub fast half [[MUL1]], [[TMP0]]
-; GFX-UNSAFE-FP-IEEE-NEXT: br label %[[COMMON_RET]]
-;
-; GFX-UNSAFE-FP-PRESERVE-LABEL: define half @_branch3(
-; GFX-UNSAFE-FP-PRESERVE-SAME: ptr dereferenceable(8) [[X:%.*]], ptr dereferenceable(8) [[Y:%.*]], ptr dereferenceable(8) [[A:%.*]]) #[[ATTR0]] {
-; GFX-UNSAFE-FP-PRESERVE-NEXT: [[ENTRY:.*:]]
-; GFX-UNSAFE-FP-PRESERVE-NEXT: [[TMP0:%.*]] = load half, ptr [[Y]], align 8
-; GFX-UNSAFE-FP-PRESERVE-NEXT: [[CMP:%.*]] = fcmp oeq half [[TMP0]], 0xH0000
-; GFX-UNSAFE-FP-PRESERVE-NEXT: [[TMP1:%.*]] = load half, ptr [[X]], align 8
-; GFX-UNSAFE-FP-PRESERVE-NEXT: [[TMP2:%.*]] = load half, ptr [[A]], align 8
-; GFX-UNSAFE-FP-PRESERVE-NEXT: [[MUL:%.*]] = fmul fast half [[TMP1]], [[TMP2]]
-; GFX-UNSAFE-FP-PRESERVE-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
-; GFX-UNSAFE-FP-PRESERVE: [[COMMON_RET:.*]]:
-; GFX-UNSAFE-FP-PRESERVE-NEXT: [[COMMON_RET_OP:%.*]] = phi half [ [[MUL]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
-; GFX-UNSAFE-FP-PRESERVE-NEXT: ret half [[COMMON_RET_OP]]
-; GFX-UNSAFE-FP-PRESERVE: [[IF_THEN]]:
-; GFX-UNSAFE-FP-PRESERVE-NEXT: [[ADD:%.*]] = fadd fast half 0xH3C00, [[MUL]]
-; GFX-UNSAFE-FP-PRESERVE-NEXT: br label %[[COMMON_RET]]
-; GFX-UNSAFE-FP-PRESERVE: [[IF_ELSE]]:
-; GFX-UNSAFE-FP-PRESERVE-NEXT: [[SUB]] = fsub fast half [[MUL]], [[TMP0]]
-; GFX-UNSAFE-FP-PRESERVE-NEXT: br label %[[COMMON_RET]]
-;
-entry:
- %0 = load half, ptr %y, align 8
- %cmp = fcmp oeq half %0, 0.000000e+00
- %1 = load half, ptr %x, align 8
- br i1 %cmp, label %if.then, label %if.else
-
-if.then: ; preds = %entry
- %2 = load half, ptr %a, align 8
- %mul = fmul fast half %1, %2
- %add = fadd fast half 1.000000e+00, %mul
- ret half %mul
-
-if.else: ; preds = %entry
- %3 = load half, ptr %a, align 8
- %mul1 = fmul fast half %1, %3
- %sub = fsub fast half %mul1, %0
- ret half %sub
-}
-
diff --git a/llvm/test/CodeGen/AMDGPU/prevent-fmul-hoist-ir.ll b/llvm/test/CodeGen/AMDGPU/prevent-fmul-hoist-ir.ll
new file mode 100644
index 00000000000000..1c5f5882aa1345
--- /dev/null
+++ b/llvm/test/CodeGen/AMDGPU/prevent-fmul-hoist-ir.ll
@@ -0,0 +1,447 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt -S -passes=simplifycfg -verify-machineinstrs -hoist-common-insts=true -mtriple=amdgcn-- --fp-contract=fast -mcpu=gfx1030 < %s | FileCheck -check-prefix=GFX -check-prefix=FP-CONTRACT-FAST %s
+; RUN: opt -S -passes=simplifycfg -verify-machineinstrs -hoist-common-insts=true -mtriple=amdgcn-- --fp-contract=off --enable-unsafe-fp-math -mcpu=gfx1030 < %s | FileCheck -check-prefix=GFX -check-prefix=UNSAFE-FP-MATH %s
+; RUN: opt -S -passes=simplifycfg -verify-machineinstrs -hoist-common-insts=true -mtriple=amdgcn-- --fp-contract=off -mcpu=gfx1030 < %s | FileCheck -check-prefix=GFX -check-prefix=NO-UNSAFE-FP-MATH %s
+
+define double @is_profitable_f64_contract(ptr dereferenceable(8) %ptr_x, ptr dereferenceable(8) %ptr_y, ptr dereferenceable(8) %ptr_a) #0 {
+; GFX-LABEL: define double @is_profitable_f64_contract(
+; GFX-SAME: ptr dereferenceable(8) [[PTR_X:%.*]], ptr dereferenceable(8) [[PTR_Y:%.*]], ptr dereferenceable(8) [[PTR_A:%.*]]) #[[ATTR0:[0-9]+]] {
+; GFX-NEXT: [[ENTRY:.*:]]
+; GFX-NEXT: [[Y:%.*]] = load double, ptr [[PTR_Y]], align 8
+; GFX-NEXT: [[CMP:%.*]] = fcmp oeq double [[Y]], 0.000000e+00
+; GFX-NEXT: [[X:%.*]] = load double, ptr [[PTR_X]], align 8
+; GFX-NEXT: [[A_1:%.*]] = load double, ptr [[PTR_A]], align 8
+; GFX-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; GFX: [[COMMON_RET:.*]]:
+; GFX-NEXT: [[COMMON_RET_OP:%.*]] = phi double [ [[ADD:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; GFX-NEXT: ret double [[COMMON_RET_OP]]
+; GFX: [[IF_THEN]]:
+; GFX-NEXT: [[MUL:%.*]] = fmul contract double [[X]], [[A_1]]
+; GFX-NEXT: [[ADD]] = fadd contract double 1.000000e+00, [[MUL]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+; GFX: [[IF_ELSE]]:
+; GFX-NEXT: [[MUL1:%.*]] = fmul contract double [[X]], [[A_1]]
+; GFX-NEXT: [[SUB]] = fsub contract double [[MUL1]], [[Y]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+;
+entry:
+ %y = load double, ptr %ptr_y, align 8
+ %cmp = fcmp oeq double %y, 0.000000e+00
+ %x = load double, ptr %ptr_x, align 8
+ br i1 %cmp, label %if.then, label %if.else
+
+if.then: ; preds = %entry
+ %a_1 = load double, ptr %ptr_a, align 8
+ %mul = fmul contract double %x, %a_1
+ %add = fadd contract double 1.000000e+00, %mul
+ ret double %add
+
+if.else: ; preds = %entry
+ %a_2 = load double, ptr %ptr_a, align 8
+ %mul1 = fmul contract double %x, %a_2
+ %sub = fsub contract double %mul1, %y
+ ret double %sub
+}
+
+define double @is_profitable_f64_modifiers(ptr dereferenceable(8) %ptr_x, ptr dereferenceable(8) %ptr_y, ptr dereferenceable(8) %ptr_a) #0 {
+; GFX-LABEL: define double @is_profitable_f64_modifiers(
+; GFX-SAME: ptr dereferenceable(8) [[PTR_X:%.*]], ptr dereferenceable(8) [[PTR_Y:%.*]], ptr dereferenceable(8) [[PTR_A:%.*]]) #[[ATTR0]] {
+; GFX-NEXT: [[ENTRY:.*:]]
+; GFX-NEXT: [[Y:%.*]] = load double, ptr [[PTR_Y]], align 8
+; GFX-NEXT: [[CMP:%.*]] = fcmp oeq double [[Y]], 0.000000e+00
+; GFX-NEXT: [[X:%.*]] = load double, ptr [[PTR_X]], align 8
+; GFX-NEXT: [[A_1:%.*]] = load double, ptr [[PTR_A]], align 8
+; GFX-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; GFX: [[COMMON_RET:.*]]:
+; GFX-NEXT: [[COMMON_RET_OP:%.*]] = phi double [ [[FNEG:%.*]], %[[IF_THEN]] ], [ [[FABS:%.*]], %[[IF_ELSE]] ]
+; GFX-NEXT: ret double [[COMMON_RET_OP]]
+; GFX: [[IF_THEN]]:
+; GFX-NEXT: [[MUL:%.*]] = fmul contract double [[X]], [[A_1]]
+; GFX-NEXT: [[ADD:%.*]] = fadd contract double 1.000000e+00, [[MUL]]
+; GFX-NEXT: [[FNEG]] = fneg double [[ADD]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+; GFX: [[IF_ELSE]]:
+; GFX-NEXT: [[MUL1:%.*]] = fmul contract double [[X]], [[A_1]]
+; GFX-NEXT: [[SUB:%.*]] = fsub contract double [[MUL1]], [[Y]]
+; GFX-NEXT: [[FABS]] = call double @llvm.fabs.f64(double [[SUB]])
+; GFX-NEXT: br label %[[COMMON_RET]]
+;
+entry:
+ %y = load double, ptr %ptr_y, align 8
+ %cmp = fcmp oeq double %y, 0.000000e+00
+ %x = load double, ptr %ptr_x, align 8
+ br i1 %cmp, label %if.then, label %if.else
+
+if.then: ; preds = %entry
+ %a_1 = load double, ptr %ptr_a, align 8
+ %mul = fmul contract double %x, %a_1
+ %add = fadd contract double 1.000000e+00, %mul
+ %fneg = fneg double %add
+ ret double %fneg
+
+if.else: ; preds = %entry
+ %a_2 = load double, ptr %ptr_a, align 8
+ %mul1 = fmul contract double %x, %a_2
+ %sub = fsub contract double %mul1, %y
+ %fabs = call double @llvm.fabs.f64(double %sub)
+ ret double %fabs
+}
+
+define float @is_profitable_f32(ptr dereferenceable(8) %ptr_x, ptr dereferenceable(8) %ptr_y, ptr dereferenceable(8) %ptr_a) #0 {
+; GFX-LABEL: define float @is_profitable_f32(
+; GFX-SAME: ptr dereferenceable(8) [[PTR_X:%.*]], ptr dereferenceable(8) [[PTR_Y:%.*]], ptr dereferenceable(8) [[PTR_A:%.*]]) #[[ATTR0]] {
+; GFX-NEXT: [[ENTRY:.*:]]
+; GFX-NEXT: [[Y:%.*]] = load float, ptr [[PTR_Y]], align 8
+; GFX-NEXT: [[CMP:%.*]] = fcmp oeq float [[Y]], 0.000000e+00
+; GFX-NEXT: [[X:%.*]] = load float, ptr [[PTR_X]], align 8
+; GFX-NEXT: [[A_1:%.*]] = load float, ptr [[PTR_A]], align 8
+; GFX-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; GFX: [[COMMON_RET:.*]]:
+; GFX-NEXT: [[COMMON_RET_OP:%.*]] = phi float [ [[MUL:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; GFX-NEXT: ret float [[COMMON_RET_OP]]
+; GFX: [[IF_THEN]]:
+; GFX-NEXT: [[MUL]] = fmul contract float [[X]], [[A_1]]
+; GFX-NEXT: [[ADD:%.*]] = fadd contract float 1.000000e+00, [[MUL]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+; GFX: [[IF_ELSE]]:
+; GFX-NEXT: [[MUL1:%.*]] = fmul contract float [[X]], [[A_1]]
+; GFX-NEXT: [[SUB]] = fsub contract float [[MUL1]], [[Y]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+;
+entry:
+ %y = load float, ptr %ptr_y, align 8
+ %cmp = fcmp oeq float %y, 0.000000e+00
+ %x = load float, ptr %ptr_x, align 8
+ br i1 %cmp, label %if.then, label %if.else
+
+
+if.then: ; preds = %entry
+ %a_1 = load float, ptr %ptr_a, align 8
+ %mul = fmul contract float %x, %a_1
+ %add = fadd contract float 1.000000e+00, %mul
+ ret float %mul
+
+if.else: ; preds = %entry
+ %a_2 = load float, ptr %ptr_a, align 8
+ %mul1 = fmul contract float %x, %a_2
+ %sub = fsub contract float %mul1, %y
+ ret float %sub
+}
+
+define half @is_profitable_f16_preserve(ptr dereferenceable(8) %ptr_x, ptr dereferenceable(8) %ptr_y, ptr dereferenceable(8) %ptr_a) #0 {
+; GFX-LABEL: define half @is_profitable_f16_preserve(
+; GFX-SAME: ptr dereferenceable(8) [[PTR_X:%.*]], ptr dereferenceable(8) [[PTR_Y:%.*]], ptr dereferenceable(8) [[PTR_A:%.*]]) #[[ATTR0]] {
+; GFX-NEXT: [[ENTRY:.*:]]
+; GFX-NEXT: [[Y:%.*]] = load half, ptr [[PTR_Y]], align 8
+; GFX-NEXT: [[CMP:%.*]] = fcmp oeq half [[Y]], 0xH0000
+; GFX-NEXT: [[X:%.*]] = load half, ptr [[PTR_X]], align 8
+; GFX-NEXT: [[A_1:%.*]] = load half, ptr [[PTR_A]], align 8
+; GFX-NEXT: [[MUL:%.*]] = fmul contract half [[X]], [[A_1]]
+; GFX-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; GFX: [[COMMON_RET:.*]]:
+; GFX-NEXT: [[COMMON_RET_OP:%.*]] = phi half [ [[MUL]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; GFX-NEXT: ret half [[COMMON_RET_OP]]
+; GFX: [[IF_THEN]]:
+; GFX-NEXT: [[ADD:%.*]] = fadd contract half [[Y]], [[MUL]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+; GFX: [[IF_ELSE]]:
+; GFX-NEXT: [[SUB]] = fsub contract half [[MUL]], [[Y]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+;
+entry:
+ %y = load half, ptr %ptr_y, align 8
+ %cmp = fcmp oeq half %y, 0.000000e+00
+ %x = load half, ptr %ptr_x, align 8
+ br i1 %cmp, label %if.then, label %if.else
+
+if.then: ; preds = %entry
+ %a_1 = load half, ptr %ptr_a, align 8
+ %mul = fmul contract half %x, %a_1
+ %add = fadd contract half %y, %mul
+ ret half %mul
+
+if.else: ; preds = %entry
+ %a_2 = load half, ptr %ptr_a, align 8
+ %mul1 = fmul contract half %x, %a_2
+ %sub = fsub contract half %mul1, %y
+ ret half %sub
+}
+
+define half @is_profitable_f16_ieee(ptr dereferenceable(8) %ptr_x, ptr dereferenceable(8) %ptr_y, ptr dereferenceable(8) %ptr_a) #1 {
+; GFX-LABEL: define half @is_profitable_f16_ieee(
+; GFX-SAME: ptr dereferenceable(8) [[PTR_X:%.*]], ptr dereferenceable(8) [[PTR_Y:%.*]], ptr dereferenceable(8) [[PTR_A:%.*]]) #[[ATTR1:[0-9]+]] {
+; GFX-NEXT: [[ENTRY:.*:]]
+; GFX-NEXT: [[Y:%.*]] = load half, ptr [[PTR_Y]], align 8
+; GFX-NEXT: [[CMP:%.*]] = fcmp oeq half [[Y]], 0xH0000
+; GFX-NEXT: [[X:%.*]] = load half, ptr [[PTR_X]], align 8
+; GFX-NEXT: [[A_1:%.*]] = load half, ptr [[PTR_A]], align 8
+; GFX-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; GFX: [[COMMON_RET:.*]]:
+; GFX-NEXT: [[COMMON_RET_OP:%.*]] = phi half [ [[MUL:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; GFX-NEXT: ret half [[COMMON_RET_OP]]
+; GFX: [[IF_THEN]]:
+; GFX-NEXT: [[MUL]] = fmul contract half [[X]], [[A_1]]
+; GFX-NEXT: [[ADD:%.*]] = fadd contract half [[Y]], [[MUL]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+; GFX: [[IF_ELSE]]:
+; GFX-NEXT: [[MUL1:%.*]] = fmul contract half [[X]], [[A_1]]
+; GFX-NEXT: [[SUB]] = fsub contract half [[MUL1]], [[Y]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+;
+entry:
+ %y = load half, ptr %ptr_y, align 8
+ %cmp = fcmp oeq half %y, 0.000000e+00
+ %x = load half, ptr %ptr_x, align 8
+ br i1 %cmp, label %if.then, label %if.else
+
+if.then: ; preds = %entry
+ %a_1 = load half, ptr %ptr_a, align 8
+ %mul = fmul contract half %x, %a_1
+ %add = fadd contract half %y, %mul
+ ret half %mul
+
+if.else: ; preds = %entry
+ %a_2 = load half, ptr %ptr_a, align 8
+ %mul1 = fmul contract half %x, %a_2
+ %sub = fsub contract half %mul1, %y
+ ret half %sub
+}
+
+define bfloat @is_profitable_bfloat_preserve(ptr dereferenceable(8) %ptr_x, ptr dereferenceable(8) %ptr_y, ptr dereferenceable(8) %ptr_a) #0 {
+; GFX-LABEL: define bfloat @is_profitable_bfloat_preserve(
+; GFX-SAME: ptr dereferenceable(8) [[PTR_X:%.*]], ptr dereferenceable(8) [[PTR_Y:%.*]], ptr dereferenceable(8) [[PTR_A:%.*]]) #[[ATTR0]] {
+; GFX-NEXT: [[ENTRY:.*:]]
+; GFX-NEXT: [[Y:%.*]] = load bfloat, ptr [[PTR_Y]], align 8
+; GFX-NEXT: [[CMP:%.*]] = fcmp oeq bfloat [[Y]], 0xR0000
+; GFX-NEXT: [[X:%.*]] = load bfloat, ptr [[PTR_X]], align 8
+; GFX-NEXT: [[A_1:%.*]] = load bfloat, ptr [[PTR_A]], align 8
+; GFX-NEXT: [[MUL:%.*]] = fmul contract bfloat [[X]], [[A_1]]
+; GFX-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; GFX: [[COMMON_RET:.*]]:
+; GFX-NEXT: [[COMMON_RET_OP:%.*]] = phi bfloat [ [[MUL]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; GFX-NEXT: ret bfloat [[COMMON_RET_OP]]
+; GFX: [[IF_THEN]]:
+; GFX-NEXT: [[ADD:%.*]] = fadd contract bfloat 0xR3F80, [[MUL]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+; GFX: [[IF_ELSE]]:
+; GFX-NEXT: [[SUB]] = fsub contract bfloat [[MUL]], [[Y]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+;
+entry:
+ %y = load bfloat, ptr %ptr_y, align 8
+ %cmp = fcmp oeq bfloat %y, 0.000000e+00
+ %x = load bfloat, ptr %ptr_x, align 8
+ br i1 %cmp, label %if.then, label %if.else
+
+if.then: ; preds = %entry
+ %a_1 = load bfloat, ptr %ptr_a, align 8
+ %mul = fmul contract bfloat %x, %a_1
+ %add = fadd contract bfloat 1.000000e+00, %mul
+ ret bfloat %mul
+
+if.else: ; preds = %entry
+ %a_2 = load bfloat, ptr %ptr_a, align 8
+ %mul1 = fmul contract bfloat %x, %a_2
+ %sub = fsub contract bfloat %mul1, %y
+ ret bfloat %sub
+}
+
+define bfloat @is_profitable_bfloat_ieee(ptr dereferenceable(8) %ptr_x, ptr dereferenceable(8) %ptr_y, ptr dereferenceable(8) %ptr_a) #1 {
+; GFX-LABEL: define bfloat @is_profitable_bfloat_ieee(
+; GFX-SAME: ptr dereferenceable(8) [[PTR_X:%.*]], ptr dereferenceable(8) [[PTR_Y:%.*]], ptr dereferenceable(8) [[PTR_A:%.*]]) #[[ATTR1]] {
+; GFX-NEXT: [[ENTRY:.*:]]
+; GFX-NEXT: [[Y:%.*]] = load bfloat, ptr [[PTR_Y]], align 8
+; GFX-NEXT: [[CMP:%.*]] = fcmp oeq bfloat [[Y]], 0xR0000
+; GFX-NEXT: [[X:%.*]] = load bfloat, ptr [[PTR_X]], align 8
+; GFX-NEXT: [[A_1:%.*]] = load bfloat, ptr [[PTR_A]], align 8
+; GFX-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; GFX: [[COMMON_RET:.*]]:
+; GFX-NEXT: [[COMMON_RET_OP:%.*]] = phi bfloat [ [[MUL:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; GFX-NEXT: ret bfloat [[COMMON_RET_OP]]
+; GFX: [[IF_THEN]]:
+; GFX-NEXT: [[MUL]] = fmul contract bfloat [[X]], [[A_1]]
+; GFX-NEXT: [[ADD:%.*]] = fadd contract bfloat 0xR3F80, [[MUL]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+; GFX: [[IF_ELSE]]:
+; GFX-NEXT: [[MUL1:%.*]] = fmul contract bfloat [[X]], [[A_1]]
+; GFX-NEXT: [[SUB]] = fsub contract bfloat [[MUL1]], [[Y]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+;
+entry:
+ %y = load bfloat, ptr %ptr_y, align 8
+ %cmp = fcmp oeq bfloat %y, 0.000000e+00
+ %x = load bfloat, ptr %ptr_x, align 8
+ br i1 %cmp, label %if.then, label %if.else
+
+if.then: ; preds = %entry
+ %a_1 = load bfloat, ptr %ptr_a, align 8
+ %mul = fmul contract bfloat %x, %a_1
+ %add = fadd contract bfloat 1.000000e+00, %mul
+ ret bfloat %mul
+
+if.else: ; preds = %entry
+ %a_2 = load bfloat, ptr %ptr_a, align 8
+ %mul1 = fmul contract bfloat %x, %a_2
+ %sub = fsub contract bfloat %mul1, %y
+ ret bfloat %sub
+}
+
+define double @is_profitable_constant(ptr dereferenceable(8) %ptr_x, ptr dereferenceable(8) %ptr_y, ptr dereferenceable(8) %ptr_a) #1 {
+; GFX-LABEL: define double @is_profitable_constant(
+; GFX-SAME: ptr dereferenceable(8) [[PTR_X:%.*]], ptr dereferenceable(8) [[PTR_Y:%.*]], ptr dereferenceable(8) [[PTR_A:%.*]]) #[[ATTR1]] {
+; GFX-NEXT: [[ENTRY:.*:]]
+; GFX-NEXT: [[Y:%.*]] = load double, ptr [[PTR_Y]], align 8
+; GFX-NEXT: [[CMP:%.*]] = fcmp oeq double [[Y]], 0.000000e+00
+; GFX-NEXT: [[X:%.*]] = load double, ptr [[PTR_X]], align 8
+; GFX-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; GFX: [[COMMON_RET:.*]]:
+; GFX-NEXT: [[COMMON_RET_OP:%.*]] = phi double [ [[ADD:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; GFX-NEXT: ret double [[COMMON_RET_OP]]
+; GFX: [[IF_THEN]]:
+; GFX-NEXT: [[MUL:%.*]] = fmul contract double 2.000000e+00, [[X]]
+; GFX-NEXT: [[ADD]] = fadd contract double 1.000000e+00, [[MUL]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+; GFX: [[IF_ELSE]]:
+; GFX-NEXT: [[MUL1:%.*]] = fmul contract double 3.000000e+00, [[X]]
+; GFX-NEXT: [[SUB]] = fsub contract double [[MUL1]], [[Y]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+;
+entry:
+ %y = load double, ptr %ptr_y, align 8
+ %cmp = fcmp oeq double %y, 0.000000e+00
+ %x = load double, ptr %ptr_x, align 8
+ br i1 %cmp, label %if.then, label %if.else
+
+if.then: ; preds = %entry
+ %mul = fmul contract double 2.000000e+00, %x
+ %add = fadd contract double 1.000000e+00, %mul
+ ret double %add
+
+if.else: ; preds = %entry
+ %mul1 = fmul contract double 3.000000e+00, %x
+ %sub = fsub contract double %mul1, %y
+ ret double %sub
+}
+
+%vec_type = type <8 x double>
+ at v1_ptr = external addrspace(3) global ptr
+ at v2_ptr = external addrspace(3) global ptr
+
+define %vec_type @is_profitable_vector(ptr dereferenceable(8) %ptr_x, ptr dereferenceable(8) %ptr_y, ptr dereferenceable(8) %ptr_a) {
+; GFX-LABEL: define <8 x double> @is_profitable_vector(
+; GFX-SAME: ptr dereferenceable(8) [[PTR_X:%.*]], ptr dereferenceable(8) [[PTR_Y:%.*]], ptr dereferenceable(8) [[PTR_A:%.*]]) #[[ATTR2:[0-9]+]] {
+; GFX-NEXT: [[ENTRY:.*:]]
+; GFX-NEXT: [[Y:%.*]] = load double, ptr [[PTR_Y]], align 8
+; GFX-NEXT: [[X:%.*]] = load <8 x double>, ptr [[PTR_X]], align 8
+; GFX-NEXT: [[V1:%.*]] = load <8 x double>, ptr addrspace(3) @v1_ptr, align 64
+; GFX-NEXT: [[V2:%.*]] = load <8 x double>, ptr addrspace(3) @v2_ptr, align 64
+; GFX-NEXT: [[CMP:%.*]] = fcmp oeq double [[Y]], 0.000000e+00
+; GFX-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; GFX: [[COMMON_RET:.*]]:
+; GFX-NEXT: [[COMMON_RET_OP:%.*]] = phi <8 x double> [ [[ADD:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; GFX-NEXT: ret <8 x double> [[COMMON_RET_OP]]
+; GFX: [[IF_THEN]]:
+; GFX-NEXT: [[MUL:%.*]] = fmul contract <8 x double> [[V1]], [[X]]
+; GFX-NEXT: [[ADD]] = fadd contract <8 x double> [[V2]], [[MUL]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+; GFX: [[IF_ELSE]]:
+; GFX-NEXT: [[MUL1:%.*]] = fmul contract <8 x double> [[V1]], [[X]]
+; GFX-NEXT: [[SUB]] = fsub contract <8 x double> [[MUL1]], [[V2]]
+; GFX-NEXT: br label %[[COMMON_RET]]
+;
+entry:
+ %y = load double, ptr %ptr_y, align 8
+ %x = load %vec_type, ptr %ptr_x, align 8
+ %v1 = load %vec_type, ptr addrspace(3) @v1_ptr
+ %v2 = load %vec_type, ptr addrspace(3) @v2_ptr
+ %cmp = fcmp oeq double %y, 0.000000e+00
+ br i1 %cmp, label %if.then, label %if.else
+
+if.then: ; preds = %entry
+ %mul = fmul contract %vec_type %v1, %x
+ %add = fadd contract %vec_type %v2, %mul
+ ret %vec_type %add
+
+if.else: ; preds = %entry
+ %mul1 = fmul contract %vec_type %v1, %x
+ %sub = fsub contract %vec_type %mul1, %v2
+ ret %vec_type %sub
+}
+
+define double @is_profitable_f64_nocontract(ptr dereferenceable(8) %ptr_x, ptr dereferenceable(8) %ptr_y, ptr dereferenceable(8) %ptr_a) #0 {
+; FP-CONTRACT-FAST-LABEL: define double @is_profitable_f64_nocontract(
+; FP-CONTRACT-FAST-SAME: ptr dereferenceable(8) [[PTR_X:%.*]], ptr dereferenceable(8) [[PTR_Y:%.*]], ptr dereferenceable(8) [[PTR_A:%.*]]) #[[ATTR0]] {
+; FP-CONTRACT-FAST-NEXT: [[Y:%.*]] = load double, ptr [[PTR_Y]], align 8
+; FP-CONTRACT-FAST-NEXT: [[CMP:%.*]] = fcmp oeq double [[Y]], 0.000000e+00
+; FP-CONTRACT-FAST-NEXT: [[X:%.*]] = load double, ptr [[PTR_X]], align 8
+; FP-CONTRACT-FAST-NEXT: [[A_1:%.*]] = load double, ptr [[PTR_A]], align 8
+; FP-CONTRACT-FAST-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; FP-CONTRACT-FAST: [[COMMON_RET:.*]]:
+; FP-CONTRACT-FAST-NEXT: [[COMMON_RET_OP:%.*]] = phi double [ [[PTR_ADD:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; FP-CONTRACT-FAST-NEXT: ret double [[COMMON_RET_OP]]
+; FP-CONTRACT-FAST: [[IF_THEN]]:
+; FP-CONTRACT-FAST-NEXT: [[MUL:%.*]] = fmul double [[X]], [[A_1]]
+; FP-CONTRACT-FAST-NEXT: [[PTR_ADD]] = fadd double 1.000000e+00, [[MUL]]
+; FP-CONTRACT-FAST-NEXT: br label %[[COMMON_RET]]
+; FP-CONTRACT-FAST: [[IF_ELSE]]:
+; FP-CONTRACT-FAST-NEXT: [[MUL1:%.*]] = fmul double [[X]], [[A_1]]
+; FP-CONTRACT-FAST-NEXT: [[SUB]] = fsub double [[MUL1]], [[Y]]
+; FP-CONTRACT-FAST-NEXT: br label %[[COMMON_RET]]
+;
+; UNSAFE-FP-MATH-LABEL: define double @is_profitable_f64_nocontract(
+; UNSAFE-FP-MATH-SAME: ptr dereferenceable(8) [[PTR_X:%.*]], ptr dereferenceable(8) [[PTR_Y:%.*]], ptr dereferenceable(8) [[PTR_A:%.*]]) #[[ATTR0]] {
+; UNSAFE-FP-MATH-NEXT: [[Y:%.*]] = load double, ptr [[PTR_Y]], align 8
+; UNSAFE-FP-MATH-NEXT: [[CMP:%.*]] = fcmp oeq double [[Y]], 0.000000e+00
+; UNSAFE-FP-MATH-NEXT: [[X:%.*]] = load double, ptr [[PTR_X]], align 8
+; UNSAFE-FP-MATH-NEXT: [[A_1:%.*]] = load double, ptr [[PTR_A]], align 8
+; UNSAFE-FP-MATH-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; UNSAFE-FP-MATH: [[COMMON_RET:.*]]:
+; UNSAFE-FP-MATH-NEXT: [[COMMON_RET_OP:%.*]] = phi double [ [[PTR_ADD:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; UNSAFE-FP-MATH-NEXT: ret double [[COMMON_RET_OP]]
+; UNSAFE-FP-MATH: [[IF_THEN]]:
+; UNSAFE-FP-MATH-NEXT: [[MUL:%.*]] = fmul double [[X]], [[A_1]]
+; UNSAFE-FP-MATH-NEXT: [[PTR_ADD]] = fadd double 1.000000e+00, [[MUL]]
+; UNSAFE-FP-MATH-NEXT: br label %[[COMMON_RET]]
+; UNSAFE-FP-MATH: [[IF_ELSE]]:
+; UNSAFE-FP-MATH-NEXT: [[MUL1:%.*]] = fmul double [[X]], [[A_1]]
+; UNSAFE-FP-MATH-NEXT: [[SUB]] = fsub double [[MUL1]], [[Y]]
+; UNSAFE-FP-MATH-NEXT: br label %[[COMMON_RET]]
+;
+; NO-UNSAFE-FP-MATH-LABEL: define double @is_profitable_f64_nocontract(
+; NO-UNSAFE-FP-MATH-SAME: ptr dereferenceable(8) [[PTR_X:%.*]], ptr dereferenceable(8) [[PTR_Y:%.*]], ptr dereferenceable(8) [[PTR_A:%.*]]) #[[ATTR0]] {
+; NO-UNSAFE-FP-MATH-NEXT: [[Y:%.*]] = load double, ptr [[PTR_Y]], align 8
+; NO-UNSAFE-FP-MATH-NEXT: [[CMP:%.*]] = fcmp oeq double [[Y]], 0.000000e+00
+; NO-UNSAFE-FP-MATH-NEXT: [[X:%.*]] = load double, ptr [[PTR_X]], align 8
+; NO-UNSAFE-FP-MATH-NEXT: [[A_1:%.*]] = load double, ptr [[PTR_A]], align 8
+; NO-UNSAFE-FP-MATH-NEXT: [[MUL:%.*]] = fmul double [[X]], [[A_1]]
+; NO-UNSAFE-FP-MATH-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
+; NO-UNSAFE-FP-MATH: [[COMMON_RET:.*]]:
+; NO-UNSAFE-FP-MATH-NEXT: [[COMMON_RET_OP:%.*]] = phi double [ [[PTR_ADD:%.*]], %[[IF_THEN]] ], [ [[SUB:%.*]], %[[IF_ELSE]] ]
+; NO-UNSAFE-FP-MATH-NEXT: ret double [[COMMON_RET_OP]]
+; NO-UNSAFE-FP-MATH: [[IF_THEN]]:
+; NO-UNSAFE-FP-MATH-NEXT: [[PTR_ADD]] = fadd double 1.000000e+00, [[MUL]]
+; NO-UNSAFE-FP-MATH-NEXT: br label %[[COMMON_RET]]
+; NO-UNSAFE-FP-MATH: [[IF_ELSE]]:
+; NO-UNSAFE-FP-MATH-NEXT: [[SUB]] = fsub double [[MUL]], [[Y]]
+; NO-UNSAFE-FP-MATH-NEXT: br label %[[COMMON_RET]]
+;
+ %y = load double, ptr %ptr_y, align 8
+ %cmp = fcmp oeq double %y, 0.000000e+00
+ %x = load double, ptr %ptr_x, align 8
+ br i1 %cmp, label %if.then, label %if.else
+
+if.then: ; preds = %entry
+ %a_1 = load double, ptr %ptr_a, align 8
+ %mul = fmul double %x, %a_1
+ %ptr_add = fadd double 1.000000e+00, %mul
+ ret double %ptr_add
+
+if.else: ; preds = %entry
+ %a_2 = load double, ptr %ptr_a, align 8
+ %mul1 = fmul double %x, %a_2
+ %sub = fsub double %mul1, %y
+ ret double %sub
+}
+
+attributes #0 = { nounwind "denormal-fp-math"="preserve-sign,preserve-sign" }
+attributes #1 = { nounwind "denormal-fp-math"="ieee,ieee" }
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