Index: lib/Target/AMDGPU/SIISelLowering.cpp
===================================================================
--- lib/Target/AMDGPU/SIISelLowering.cpp
+++ lib/Target/AMDGPU/SIISelLowering.cpp
@@ -4616,15 +4616,93 @@
   return SDValue();
 }
 
+static bool isCanonicalized(SDValue Op, const SISubtarget *ST,
+                            unsigned MaxDepth=5) {
+  // If source is a result of another standard FP operation it is already in
+  // canonical form.
+
+  switch (Op.getOpcode()) {
+  default:
+    break;
+
+  // These will flush denorms if required.
+  case ISD::FADD:
+  case ISD::FSUB:
+  case ISD::FMUL:
+  case ISD::FSQRT:
+  case ISD::FCEIL:
+  case ISD::FFLOOR:
+  case ISD::FMA:
+  case ISD::FMAD:
+
+  case ISD::FCANONICALIZE:
+    return true;
+
+  case ISD::FP_ROUND:
+    return Op.getValueType().getScalarType() != MVT::f16 ||
+           ST->hasFP16Denormals();
+
+  case ISD::FP_EXTEND:
+    return Op.getOperand(0).getValueType().getScalarType() != MVT::f16 ||
+           ST->hasFP16Denormals();
+
+  case ISD::FP16_TO_FP:
+  case ISD::FP_TO_FP16:
+    return ST->hasFP16Denormals();
+
+  // It can/will be lowered or combined as a bit operation.
+  // Need to check their input recursively to handle.
+  case ISD::FNEG:
+  case ISD::FABS:
+    return (MaxDepth > 0) &&
+           isCanonicalized(Op.getOperand(0), ST, MaxDepth - 1);
+
+  case ISD::FSIN:
+  case ISD::FCOS:
+  case ISD::FSINCOS:
+    return Op.getValueType().getScalarType() != MVT::f16;
+
+  // In pre-GFX9 targets V_MIN_F32 and others do not flush denorms.
+  // For such targets need to check their input recursively.
+  case ISD::FMINNUM:
+  case ISD::FMAXNUM:
+  case ISD::FMINNAN:
+  case ISD::FMAXNAN:
+    if (ST->getGeneration() >= SISubtarget::GFX9)
+      return true;
+
+    return (MaxDepth > 0) &&
+           isCanonicalized(Op.getOperand(0), ST, MaxDepth - 1) &&
+           isCanonicalized(Op.getOperand(1), ST, MaxDepth - 1);
+
+  case ISD::ConstantFP: {
+    auto F = cast<ConstantFPSDNode>(Op)->getValueAPF();
+    return !F.isDenormal() && !(F.isNaN() && F.isSignaling());
+  }
+  }
+  return false;
+}
+
 // Constant fold canonicalize.
 SDValue SITargetLowering::performFCanonicalizeCombine(
   SDNode *N,
   DAGCombinerInfo &DCI) const {
+  SelectionDAG &DAG = DCI.DAG;
   ConstantFPSDNode *CFP = isConstOrConstSplatFP(N->getOperand(0));
-  if (!CFP)
+
+  if (!CFP) {
+    SDValue N0 = N->getOperand(0);
+
+    bool IsIEEEMode = Subtarget->enableIEEEBit(DAG.getMachineFunction()) ||
+                      getTargetMachine().Options.NoNaNsFPMath ||
+                      N->getFlags().hasNoNaNs();
+
+    if (IsIEEEMode && isCanonicalized(N0, getSubtarget()))
+      return N0;
+
     return SDValue();
+  }
 
-  SelectionDAG &DAG = DCI.DAG;
   const APFloat &C = CFP->getValueAPF();
 
   // Flush denormals to 0 if not enabled.
Index: test/CodeGen/AMDGPU/fcanonicalize-elimination.ll
===================================================================
--- /dev/null
+++ test/CodeGen/AMDGPU/fcanonicalize-elimination.ll
@@ -0,0 +1,483 @@
+; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs -mattr=-fp32-denormals < %s | FileCheck -check-prefix=GCN -check-prefix=VI %s
+; RUN: llc -march=amdgcn -mcpu=gfx901 -verify-machineinstrs -mattr=+fp32-denormals < %s | FileCheck -check-prefix=GCN -check-prefix=GFX9 %s
+
+; GCN-LABEL: {{^}}test_no_fold_canonicalize_loaded_value_f32:
+; GCN: v_mul_f32_e32 v{{[0-9]+}}, 1.0, v{{[0-9]+}}
+define amdgpu_kernel void @test_no_fold_canonicalize_loaded_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %v = load float, float addrspace(1)* %gep, align 4
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: {{^}}test_fold_canonicalize_fmul_value_f32:
+; GCN: v_mul_f32_e32 [[V:v[0-9]+]], 0x41700000, v{{[0-9]+}}
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_fmul_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = fmul float %load, 15.0
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: {{^}}test_fold_canonicalize_sub_value_f32:
+; GCN: v_sub_f32_e32 [[V:v[0-9]+]], 0x41700000, v{{[0-9]+}}
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_sub_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = fsub float 15.0, %load
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: {{^}}test_fold_canonicalize_add_value_f32:
+; GCN: v_add_f32_e32 [[V:v[0-9]+]], 0x41700000, v{{[0-9]+}}
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_add_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = fadd float %load, 15.0
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: {{^}}test_fold_canonicalize_sqrt_value_f32:
+; GCN: v_sqrt_f32_e32 [[V:v[0-9]+]], v{{[0-9]+}}
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_sqrt_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = call float @llvm.sqrt.f32(float %load)
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_fceil_value_f32:
+; GCN: v_ceil_f32_e32 [[V:v[0-9]+]], v{{[0-9]+}}
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_fceil_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = call float @llvm.ceil.f32(float %load)
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_floor_value_f32:
+; GCN: v_floor_f32_e32 [[V:v[0-9]+]], v{{[0-9]+}}
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_floor_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = call float @llvm.floor.f32(float %load)
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_fma_value_f32:
+; GCN: v_fma_f32 [[V:v[0-9]+]], v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_fma_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = call float @llvm.fma.f32(float %load, float 15.0, float 15.0)
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_fmuladd_value_f32:
+; VI: v_mac_f32_e32 [[V:v[0-9]+]], v{{[0-9]+}}, v{{[0-9]+}}
+; GFX9: v_fma_f32 [[V:v[0-9]+]], v{{[0-9]+}}, v{{[0-9]+}}, v{{[0-9]+}}
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_fmuladd_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = call float @llvm.fmuladd.f32(float %load, float 15.0, float 15.0)
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_canonicalize_value_f32:
+; GCN: flat_load_dword [[LOAD:v[0-9]+]],
+; GCN: v_mul_f32_e32 [[V:v[0-9]+]], 1.0, [[LOAD]]
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_canonicalize_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = call float @llvm.canonicalize.f32(float %load)
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_fpextend_value_f64_f32:
+; GCN: v_cvt_f64_f32_e32 [[V:v\[[0-9]+:[0-9]+\]]], v{{[0-9]+}}
+; GCN: flat_store_dwordx2 v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_fpextend_value_f64_f32(float addrspace(1)* %arg, double addrspace(1)* %out) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = fpext float %load to double
+  %canonicalized = tail call double @llvm.canonicalize.f64(double %v)
+  %gep2 = getelementptr inbounds double, double addrspace(1)* %out, i32 %id
+  store double %canonicalized, double addrspace(1)* %gep2, align 8
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_fpextend_value_f32_f16:
+; GCN: v_cvt_f32_f16_e32 [[V:v[0-9]+]], v{{[0-9]+}}
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_fpextend_value_f32_f16(half addrspace(1)* %arg, float addrspace(1)* %out) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds half, half addrspace(1)* %arg, i32 %id
+  %load = load half, half addrspace(1)* %gep, align 2
+  %v = fpext half %load to float
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  %gep2 = getelementptr inbounds float, float addrspace(1)* %out, i32 %id
+  store float %canonicalized, float addrspace(1)* %gep2, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_fpround_value_f32_f64:
+; GCN: v_cvt_f32_f64_e32 [[V:v[0-9]+]], v[{{[0-9:]+}}]
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_fpround_value_f32_f64(double addrspace(1)* %arg, float addrspace(1)* %out) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds double, double addrspace(1)* %arg, i32 %id
+  %load = load double, double addrspace(1)* %gep, align 8
+  %v = fptrunc double %load to float
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  %gep2 = getelementptr inbounds float, float addrspace(1)* %out, i32 %id
+  store float %canonicalized, float addrspace(1)* %gep2, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_fpround_value_f16_f32:
+; GCN: v_cvt_f16_f32_e32 [[V:v[0-9]+]], v{{[0-9]+}}
+; GCN: flat_store_short v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_fpround_value_f16_f32(float addrspace(1)* %arg, half addrspace(1)* %out) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = fptrunc float %load to half
+  %canonicalized = tail call half @llvm.canonicalize.f16(half %v)
+  %gep2 = getelementptr inbounds half, half addrspace(1)* %out, i32 %id
+  store half %canonicalized, half addrspace(1)* %gep2, align 2
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_fpround_value_v2f16_v2f32:
+; GCN-DAG: v_cvt_f16_f32_e32 [[V0:v[0-9]+]], v{{[0-9]+}}
+; VI-DAG: v_cvt_f16_f32_sdwa [[V1:v[0-9]+]], v{{[0-9]+}}
+; VI: v_or_b32_e32 [[V:v[0-9]+]], [[V0]], [[V1]]
+; GFX9: v_cvt_f16_f32_e32 [[V1:v[0-9]+]], v{{[0-9]+}}
+; GFX9: v_and_b32_e32 [[V0_16:v[0-9]+]], 0xffff, [[V0]]
+; GFX9: v_lshl_or_b32 [[V:v[0-9]+]], [[V1]], 16, [[V0_16]]
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_fpround_value_v2f16_v2f32(<2 x float> addrspace(1)* %arg, <2 x half> addrspace(1)* %out) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds <2 x float>, <2 x float> addrspace(1)* %arg, i32 %id
+  %load = load <2 x float>, <2 x float> addrspace(1)* %gep, align 8
+  %v = fptrunc <2 x float> %load to <2 x half>
+  %canonicalized = tail call <2 x half> @llvm.canonicalize.v2f16(<2 x half> %v)
+  %gep2 = getelementptr inbounds <2 x half>, <2 x half> addrspace(1)* %out, i32 %id
+  store <2 x half> %canonicalized, <2 x half> addrspace(1)* %gep2, align 4
+  ret void
+}
+
+; GCN-LABEL: test_no_fold_canonicalize_fneg_value_f32:
+; GCN: v_mul_f32_e64 v{{[0-9]+}}, 1.0, -v{{[0-9]+}}
+define amdgpu_kernel void @test_no_fold_canonicalize_fneg_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = fsub float -0.0, %load
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_fneg_value_f32:
+; GCN: v_xor_b32_e32 [[V:v[0-9]+]], 0x80000000, v{{[0-9]+}}
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_fneg_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v0 = fadd float %load, 0.0
+  %v = fsub float -0.0, %v0
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_no_fold_canonicalize_fabs_value_f32:
+; GCN: v_mul_f32_e64 v{{[0-9]+}}, 1.0, |v{{[0-9]+}}|
+define amdgpu_kernel void @test_no_fold_canonicalize_fabs_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = tail call float @llvm.fabs.f32(float %load)
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_fabs_value_f32:
+; GCN: v_and_b32_e32 [[V:v[0-9]+]], 0x7fffffff, v{{[0-9]+}}
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_fabs_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v0 = fadd float %load, 0.0
+  %v = tail call float @llvm.fabs.f32(float %v0)
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_sin_value_f32:
+; GCN: v_sin_f32_e32 [[V:v[0-9]+]], v{{[0-9]+}}
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_sin_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = tail call float @llvm.sin.f32(float %load)
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_cos_value_f32:
+; GCN: v_cos_f32_e32 [[V:v[0-9]+]], v{{[0-9]+}}
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_cos_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = tail call float @llvm.cos.f32(float %load)
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_sin_value_f16:
+; GCN: v_sin_f32_e32 [[V0:v[0-9]+]], v{{[0-9]+}}
+; GCN: v_cvt_f16_f32_e32 [[V:v[0-9]+]], [[V0]]
+; GCN: flat_store_short v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_sin_value_f16(half addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds half, half addrspace(1)* %arg, i32 %id
+  %load = load half, half addrspace(1)* %gep, align 2
+  %v = tail call half @llvm.sin.f16(half %load)
+  %canonicalized = tail call half @llvm.canonicalize.f16(half %v)
+  store half %canonicalized, half addrspace(1)* %gep, align 2
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_cos_value_f16:
+; GCN: v_cos_f32_e32 [[V0:v[0-9]+]], v{{[0-9]+}}
+; GCN: v_cvt_f16_f32_e32 [[V:v[0-9]+]], [[V0]]
+; GCN: flat_store_short v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_cos_value_f16(half addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds half, half addrspace(1)* %arg, i32 %id
+  %load = load half, half addrspace(1)* %gep, align 2
+  %v = tail call half @llvm.cos.f16(half %load)
+  %canonicalized = tail call half @llvm.canonicalize.f16(half %v)
+  store half %canonicalized, half addrspace(1)* %gep, align 2
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_qNaN_value_f32:
+; GCN: v_mov_b32_e32 [[V:v[0-9]+]], 0x7fc00000
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_qNaN_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %canonicalized = tail call float @llvm.canonicalize.f32(float 0x7FF8000000000000)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_minnum_value_from_load_f32:
+; VI: v_mul_f32_e32 v{{[0-9]+}}, 1.0, v{{[0-9]+}}
+; GFX9: v_min_f32_e32 [[V:v[0-9]+]], 0, v{{[0-9]+}}
+; GFX9: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GFX9-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_minnum_value_from_load_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = tail call float @llvm.minnum.f32(float %load, float 0.0)
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_minnum_value_f32:
+; GCN: v_min_f32_e32 [[V:v[0-9]+]], 0, v{{[0-9]+}}
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_minnum_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v0 = fadd float %load, 0.0
+  %v = tail call float @llvm.minnum.f32(float %v0, float 0.0)
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_sNaN_value_f32:
+; GCN:  v_min_f32_e32 [[V0:v[0-9]+]], 0x7f800001, v{{[0-9]+}}
+; VI:   v_mul_f32_e32 v{{[0-9]+}}, 1.0, [[V0]]
+; VI:   flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GFX9: flat_store_dword v[{{[0-9:]+}}], [[V0]]
+; GFX9-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_sNaN_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = tail call float @llvm.minnum.f32(float %load, float bitcast (i32 2139095041 to float))
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_denorm_value_f32:
+; GCN:  v_min_f32_e32 [[V0:v[0-9]+]], 0x7fffff, v{{[0-9]+}}
+; VI:   v_mul_f32_e32 v{{[0-9]+}}, 1.0, [[V0]]
+; VI:   flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GFX9: flat_store_dword v[{{[0-9:]+}}], [[V0]]
+; GFX9-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_denorm_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = tail call float @llvm.minnum.f32(float %load, float bitcast (i32 8388607 to float))
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_maxnum_value_from_load_f32:
+; GCN:  v_max_f32_e32 [[V0:v[0-9]+]], 0, v{{[0-9]+}}
+; VI:   v_mul_f32_e32 v{{[0-9]+}}, 1.0, [[V0]]
+; VI:   flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GFX9: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GFX9-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_maxnum_value_from_load_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v = tail call float @llvm.maxnum.f32(float %load, float 0.0)
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_maxnum_value_f32:
+; GCN: v_max_f32_e32 [[V:v[0-9]+]], 0, v{{[0-9]+}}
+; GCN: flat_store_dword v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_maxnum_value_f32(float addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds float, float addrspace(1)* %arg, i32 %id
+  %load = load float, float addrspace(1)* %gep, align 4
+  %v0 = fadd float %load, 0.0
+  %v = tail call float @llvm.maxnum.f32(float %v0, float 0.0)
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  store float %canonicalized, float addrspace(1)* %gep, align 4
+  ret void
+}
+
+; GCN-LABEL: test_fold_canonicalize_maxnum_value_f64:
+; GCN: v_max_f64 [[V:v\[[0-9]+:[0-9]+\]]], v[{{[0-9:]+}}], 0
+; GCN: flat_store_dwordx2 v[{{[0-9:]+}}], [[V]]
+; GCN-NOT: 1.0
+define amdgpu_kernel void @test_fold_canonicalize_maxnum_value_f64(double addrspace(1)* %arg) {
+  %id = tail call i32 @llvm.amdgcn.workitem.id.x()
+  %gep = getelementptr inbounds double, double addrspace(1)* %arg, i32 %id
+  %load = load double, double addrspace(1)* %gep, align 8
+  %v0 = fadd double %load, 0.0
+  %v = tail call double @llvm.maxnum.f64(double %v0, double 0.0)
+  %canonicalized = tail call double @llvm.canonicalize.f64(double %v)
+  store double %canonicalized, double addrspace(1)* %gep, align 8
+  ret void
+}
+
+; GCN-LABEL: test_no_fold_canonicalize_fmul_value_f32_no_ieee:
+; GCN: v_mul_f32_e32 v{{[0-9]+}}, 1.0, v{{[0-9]+}}
+define amdgpu_ps float @test_no_fold_canonicalize_fmul_value_f32_no_ieee(float %arg) {
+entry:
+  %v = fmul float %arg, 15.0
+  %canonicalized = tail call float @llvm.canonicalize.f32(float %v)
+  ret float %canonicalized
+}
+
+declare float @llvm.canonicalize.f32(float) #0
+declare double @llvm.canonicalize.f64(double) #0
+declare half @llvm.canonicalize.f16(half) #0
+declare <2 x half> @llvm.canonicalize.v2f16(<2 x half>) #0
+declare i32 @llvm.amdgcn.workitem.id.x() #0
+declare float @llvm.sqrt.f32(float) #0
+declare float @llvm.ceil.f32(float) #0
+declare float @llvm.floor.f32(float) #0
+declare float @llvm.fma.f32(float, float, float) #0
+declare float @llvm.fmuladd.f32(float, float, float) #0
+declare float @llvm.fabs.f32(float) #0
+declare float @llvm.sin.f32(float) #0
+declare float @llvm.cos.f32(float) #0
+declare half @llvm.sin.f16(half) #0
+declare half @llvm.cos.f16(half) #0
+declare float @llvm.minnum.f32(float, float) #0
+declare float @llvm.maxnum.f32(float, float) #0
+declare double @llvm.maxnum.f64(double, double) #0
+
+attributes #0 = { nounwind readnone }