diff --git a/llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h b/llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h
--- a/llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h
+++ b/llvm/include/llvm/CodeGen/GlobalISel/LegalizerHelper.h
@@ -367,6 +367,7 @@
   LegalizeResult lowerBswap(MachineInstr &MI);
   LegalizeResult lowerBitreverse(MachineInstr &MI);
   LegalizeResult lowerReadWriteRegister(MachineInstr &MI);
+  LegalizeResult lowerSMULH_UMULH(MachineInstr &MI);
 };
 
 /// Helper function that creates a libcall to the given \p Name using the given
diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -2837,6 +2837,9 @@
   case TargetOpcode::G_SADDO:
   case TargetOpcode::G_SSUBO:
     return lowerSADDO_SSUBO(MI);
+  case TargetOpcode::G_UMULH:
+  case TargetOpcode::G_SMULH:
+    return lowerSMULH_UMULH(MI);
   case TargetOpcode::G_SMULO:
   case TargetOpcode::G_UMULO: {
     // Generate G_UMULH/G_SMULH to check for overflow and a normal G_MUL for the
@@ -6134,3 +6137,25 @@
   MI.eraseFromParent();
   return Legalized;
 }
+
+LegalizerHelper::LegalizeResult
+LegalizerHelper::lowerSMULH_UMULH(MachineInstr &MI) {
+  bool IsSigned = MI.getOpcode() == TargetOpcode::G_SMULH;
+  unsigned ExtOp = IsSigned ? TargetOpcode::G_SEXT : TargetOpcode::G_ZEXT;
+  Register Result = MI.getOperand(0).getReg();
+  LLT OrigTy = MRI.getType(Result);
+  auto SizeInBits = OrigTy.getScalarSizeInBits();
+  LLT WideTy = OrigTy.changeElementSize(SizeInBits * 2);
+
+  auto LHS = MIRBuilder.buildInstr(ExtOp, {WideTy}, {MI.getOperand(1)});
+  auto RHS = MIRBuilder.buildInstr(ExtOp, {WideTy}, {MI.getOperand(2)});
+  auto Mul = MIRBuilder.buildMul(WideTy, LHS, RHS);
+  unsigned ShiftOp = IsSigned ? TargetOpcode::G_ASHR : TargetOpcode::G_LSHR;
+
+  auto ShiftAmt = MIRBuilder.buildConstant(WideTy, SizeInBits);
+  auto Shifted = MIRBuilder.buildInstr(ShiftOp, {WideTy}, {Mul, ShiftAmt});
+  MIRBuilder.buildTrunc(Result, Shifted);
+
+  MI.eraseFromParent();
+  return Legalized;
+}
diff --git a/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp b/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
--- a/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
@@ -19,8 +19,9 @@
 #include "SIMachineFunctionInfo.h"
 #include "llvm/ADT/ScopeExit.h"
 #include "llvm/CodeGen/GlobalISel/LegalizerHelper.h"
-#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
+#include "llvm/CodeGen/GlobalISel/LegalizerInfo.h"
 #include "llvm/CodeGen/GlobalISel/MIPatternMatch.h"
+#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
 #include "llvm/CodeGen/TargetOpcodes.h"
 #include "llvm/CodeGen/ValueTypes.h"
 #include "llvm/IR/DerivedTypes.h"
@@ -421,6 +422,7 @@
   };
 
   const LLT S1 = LLT::scalar(1);
+  const LLT S8 = LLT::scalar(8);
   const LLT S16 = LLT::scalar(16);
   const LLT S32 = LLT::scalar(32);
   const LLT S64 = LLT::scalar(64);
@@ -429,6 +431,7 @@
   const LLT S512 = LLT::scalar(512);
   const LLT MaxScalar = LLT::scalar(MaxRegisterSize);
 
+  const LLT V2S8 = LLT::vector(2, 8);
   const LLT V2S16 = LLT::vector(2, 16);
   const LLT V4S16 = LLT::vector(4, 16);
 
@@ -586,10 +589,19 @@
     .widenScalarToNextPow2(0, 32)
     .scalarize(0);
 
-  getActionDefinitionsBuilder({G_UMULH, G_SMULH})
-    .legalFor({S32})
-    .clampScalar(0, S32, S32)
-    .scalarize(0);
+  auto &Mulh = getActionDefinitionsBuilder({G_UMULH, G_SMULH})
+                   .legalFor({S32})
+                   .maxScalarOrElt(0, S32);
+
+  if (ST.hasVOP3PInsts()) {
+    Mulh
+      .clampMaxNumElements(0, S8, 2)
+      .lowerFor({V2S8});
+  }
+
+  Mulh
+    .scalarize(0)
+    .lower();
 
   // Report legal for any types we can handle anywhere. For the cases only legal
   // on the SALU, RegBankSelect will be able to re-legalize.
diff --git a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-smulh.mir b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-smulh.mir
--- a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-smulh.mir
+++ b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-smulh.mir
@@ -1,5 +1,6 @@
 # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
-# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=fiji -O0 -run-pass=legalizer %s -o - | FileCheck %s
+# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=fiji -O0 -run-pass=legalizer %s -o - | FileCheck %s --check-prefix=GFX8
+# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx906 -O0 -run-pass=legalizer %s -o - | FileCheck %s --check-prefix=GFX9
 
 ---
 name: test_smulh_s32
@@ -7,11 +8,16 @@
   bb.0:
     liveins: $vgpr0, $vgpr1
 
-    ; CHECK-LABEL: name: test_smulh_s32
-    ; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
-    ; CHECK: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
-    ; CHECK: [[SMULH:%[0-9]+]]:_(s32) = G_SMULH [[COPY]], [[COPY1]]
-    ; CHECK: $vgpr0 = COPY [[SMULH]](s32)
+    ; GFX8-LABEL: name: test_smulh_s32
+    ; GFX8: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX8: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX8: [[SMULH:%[0-9]+]]:_(s32) = G_SMULH [[COPY]], [[COPY1]]
+    ; GFX8: $vgpr0 = COPY [[SMULH]](s32)
+    ; GFX9-LABEL: name: test_smulh_s32
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9: [[SMULH:%[0-9]+]]:_(s32) = G_SMULH [[COPY]], [[COPY1]]
+    ; GFX9: $vgpr0 = COPY [[SMULH]](s32)
     %0:_(s32) = COPY $vgpr0
     %1:_(s32) = COPY $vgpr1
     %2:_(s32) = G_SMULH %0, %1
@@ -24,17 +30,430 @@
   bb.0:
     liveins: $vgpr0_vgpr1, $vgpr2_vgpr3
 
-    ; CHECK-LABEL: name: test_smulh_v2s32
-    ; CHECK: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
-    ; CHECK: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
-    ; CHECK: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
-    ; CHECK: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
-    ; CHECK: [[SMULH:%[0-9]+]]:_(s32) = G_SMULH [[UV]], [[UV2]]
-    ; CHECK: [[SMULH1:%[0-9]+]]:_(s32) = G_SMULH [[UV1]], [[UV3]]
-    ; CHECK: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[SMULH]](s32), [[SMULH1]](s32)
-    ; CHECK: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    ; GFX8-LABEL: name: test_smulh_v2s32
+    ; GFX8: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; GFX8: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; GFX8: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; GFX8: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; GFX8: [[SMULH:%[0-9]+]]:_(s32) = G_SMULH [[UV]], [[UV2]]
+    ; GFX8: [[SMULH1:%[0-9]+]]:_(s32) = G_SMULH [[UV1]], [[UV3]]
+    ; GFX8: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[SMULH]](s32), [[SMULH1]](s32)
+    ; GFX8: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    ; GFX9-LABEL: name: test_smulh_v2s32
+    ; GFX9: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; GFX9: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; GFX9: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; GFX9: [[SMULH:%[0-9]+]]:_(s32) = G_SMULH [[UV]], [[UV2]]
+    ; GFX9: [[SMULH1:%[0-9]+]]:_(s32) = G_SMULH [[UV1]], [[UV3]]
+    ; GFX9: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[SMULH]](s32), [[SMULH1]](s32)
+    ; GFX9: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
     %0:_(<2 x s32>) = COPY $vgpr0_vgpr1
     %1:_(<2 x s32>) = COPY $vgpr2_vgpr3
     %2:_(<2 x s32>) = G_SMULH %0, %1
     $vgpr0_vgpr1 = COPY %2
 ...
+
+---
+name: test_smulh_s16
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+
+    ; GFX8-LABEL: name: test_smulh_s16
+    ; GFX8: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX8: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX8: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY]](s32)
+    ; GFX8: [[SEXT_INREG:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY2]], 16
+    ; GFX8: [[COPY3:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; GFX8: [[SEXT_INREG1:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY3]], 16
+    ; GFX8: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[SEXT_INREG]], [[SEXT_INREG1]]
+    ; GFX8: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX8: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[MUL]], [[C]](s32)
+    ; GFX8: [[COPY4:%[0-9]+]]:_(s32) = COPY [[ASHR]](s32)
+    ; GFX8: [[SEXT_INREG2:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY4]], 16
+    ; GFX8: $vgpr0 = COPY [[SEXT_INREG2]](s32)
+    ; GFX9-LABEL: name: test_smulh_s16
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY]](s32)
+    ; GFX9: [[SEXT_INREG:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY2]], 16
+    ; GFX9: [[COPY3:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; GFX9: [[SEXT_INREG1:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY3]], 16
+    ; GFX9: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[SEXT_INREG]], [[SEXT_INREG1]]
+    ; GFX9: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX9: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[MUL]], [[C]](s32)
+    ; GFX9: [[COPY4:%[0-9]+]]:_(s32) = COPY [[ASHR]](s32)
+    ; GFX9: [[SEXT_INREG2:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY4]], 16
+    ; GFX9: $vgpr0 = COPY [[SEXT_INREG2]](s32)
+    %0:_(s32) = COPY $vgpr0
+    %1:_(s32) = COPY $vgpr1
+    %2:_(s16) = G_TRUNC %0
+    %3:_(s16) = G_TRUNC %1
+    %4:_(s16) = G_SMULH %2, %3
+    %5:_(s32) = G_SEXT %4
+    $vgpr0 = COPY %5
+...
+
+---
+name: test_smulh_s8
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+
+    ; GFX8-LABEL: name: test_smulh_s8
+    ; GFX8: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX8: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX8: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX8: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 8
+    ; GFX8: [[SHL:%[0-9]+]]:_(s16) = G_SHL [[TRUNC]], [[C]](s16)
+    ; GFX8: [[ASHR:%[0-9]+]]:_(s16) = G_ASHR [[SHL]], [[C]](s16)
+    ; GFX8: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+    ; GFX8: [[SHL1:%[0-9]+]]:_(s16) = G_SHL [[TRUNC1]], [[C]](s16)
+    ; GFX8: [[ASHR1:%[0-9]+]]:_(s16) = G_ASHR [[SHL1]], [[C]](s16)
+    ; GFX8: [[MUL:%[0-9]+]]:_(s16) = G_MUL [[ASHR]], [[ASHR1]]
+    ; GFX8: [[ASHR2:%[0-9]+]]:_(s16) = G_ASHR [[MUL]], [[C]](s16)
+    ; GFX8: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[ASHR2]](s16)
+    ; GFX8: [[SEXT_INREG:%[0-9]+]]:_(s32) = G_SEXT_INREG [[ANYEXT]], 8
+    ; GFX8: $vgpr0 = COPY [[SEXT_INREG]](s32)
+    ; GFX9-LABEL: name: test_smulh_s8
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY]](s32)
+    ; GFX9: [[SEXT_INREG:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY2]], 8
+    ; GFX9: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[SEXT_INREG]](s32)
+    ; GFX9: [[COPY3:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; GFX9: [[SEXT_INREG1:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY3]], 8
+    ; GFX9: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[SEXT_INREG1]](s32)
+    ; GFX9: [[MUL:%[0-9]+]]:_(s16) = G_MUL [[TRUNC]], [[TRUNC1]]
+    ; GFX9: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 8
+    ; GFX9: [[ASHR:%[0-9]+]]:_(s16) = G_ASHR [[MUL]], [[C]](s16)
+    ; GFX9: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[ASHR]](s16)
+    ; GFX9: [[SEXT_INREG2:%[0-9]+]]:_(s32) = G_SEXT_INREG [[ANYEXT]], 8
+    ; GFX9: $vgpr0 = COPY [[SEXT_INREG2]](s32)
+    %0:_(s32) = COPY $vgpr0
+    %1:_(s32) = COPY $vgpr1
+    %2:_(s8) = G_TRUNC %0
+    %3:_(s8) = G_TRUNC %1
+    %4:_(s8) = G_SMULH %2, %3
+    %5:_(s32) = G_SEXT %4
+    $vgpr0 = COPY %5
+...
+
+---
+name: test_smulh_v2s16
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3
+    ; GFX8-LABEL: name: test_smulh_v2s16
+    ; GFX8: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; GFX8: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; GFX8: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; GFX8: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; GFX8: [[COPY2:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; GFX8: [[SEXT_INREG:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY2]], 16
+    ; GFX8: [[COPY3:%[0-9]+]]:_(s32) = COPY [[UV2]](s32)
+    ; GFX8: [[SEXT_INREG1:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY3]], 16
+    ; GFX8: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[SEXT_INREG]], [[SEXT_INREG1]]
+    ; GFX8: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX8: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[MUL]], [[C]](s32)
+    ; GFX8: [[COPY4:%[0-9]+]]:_(s32) = COPY [[UV1]](s32)
+    ; GFX8: [[SEXT_INREG2:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY4]], 16
+    ; GFX8: [[COPY5:%[0-9]+]]:_(s32) = COPY [[UV3]](s32)
+    ; GFX8: [[SEXT_INREG3:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY5]], 16
+    ; GFX8: [[MUL1:%[0-9]+]]:_(s32) = G_MUL [[SEXT_INREG2]], [[SEXT_INREG3]]
+    ; GFX8: [[ASHR1:%[0-9]+]]:_(s32) = G_ASHR [[MUL1]], [[C]](s32)
+    ; GFX8: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 65535
+    ; GFX8: [[COPY6:%[0-9]+]]:_(s32) = COPY [[ASHR]](s32)
+    ; GFX8: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY6]], [[C1]]
+    ; GFX8: [[COPY7:%[0-9]+]]:_(s32) = COPY [[ASHR1]](s32)
+    ; GFX8: [[AND1:%[0-9]+]]:_(s32) = G_AND [[COPY7]], [[C1]]
+    ; GFX8: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[AND1]], [[C]](s32)
+    ; GFX8: [[OR:%[0-9]+]]:_(s32) = G_OR [[AND]], [[SHL]]
+    ; GFX8: [[BITCAST:%[0-9]+]]:_(<2 x s16>) = G_BITCAST [[OR]](s32)
+    ; GFX8: [[BITCAST1:%[0-9]+]]:_(s32) = G_BITCAST [[BITCAST]](<2 x s16>)
+    ; GFX8: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST1]], [[C]](s32)
+    ; GFX8: [[COPY8:%[0-9]+]]:_(s32) = COPY [[BITCAST1]](s32)
+    ; GFX8: [[SEXT_INREG4:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY8]], 16
+    ; GFX8: [[COPY9:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; GFX8: [[SEXT_INREG5:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY9]], 16
+    ; GFX8: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[SEXT_INREG4]](s32), [[SEXT_INREG5]](s32)
+    ; GFX8: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    ; GFX9-LABEL: name: test_smulh_v2s16
+    ; GFX9: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; GFX9: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; GFX9: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; GFX9: [[COPY2:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; GFX9: [[SEXT_INREG:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY2]], 16
+    ; GFX9: [[COPY3:%[0-9]+]]:_(s32) = COPY [[UV2]](s32)
+    ; GFX9: [[SEXT_INREG1:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY3]], 16
+    ; GFX9: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[SEXT_INREG]], [[SEXT_INREG1]]
+    ; GFX9: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX9: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[MUL]], [[C]](s32)
+    ; GFX9: [[COPY4:%[0-9]+]]:_(s32) = COPY [[UV1]](s32)
+    ; GFX9: [[SEXT_INREG2:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY4]], 16
+    ; GFX9: [[COPY5:%[0-9]+]]:_(s32) = COPY [[UV3]](s32)
+    ; GFX9: [[SEXT_INREG3:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY5]], 16
+    ; GFX9: [[MUL1:%[0-9]+]]:_(s32) = G_MUL [[SEXT_INREG2]], [[SEXT_INREG3]]
+    ; GFX9: [[ASHR1:%[0-9]+]]:_(s32) = G_ASHR [[MUL1]], [[C]](s32)
+    ; GFX9: [[COPY6:%[0-9]+]]:_(s32) = COPY [[ASHR]](s32)
+    ; GFX9: [[COPY7:%[0-9]+]]:_(s32) = COPY [[ASHR1]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY6]](s32), [[COPY7]](s32)
+    ; GFX9: [[BITCAST:%[0-9]+]]:_(s32) = G_BITCAST [[BUILD_VECTOR_TRUNC]](<2 x s16>)
+    ; GFX9: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST]], [[C]](s32)
+    ; GFX9: [[COPY8:%[0-9]+]]:_(s32) = COPY [[BITCAST]](s32)
+    ; GFX9: [[SEXT_INREG4:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY8]], 16
+    ; GFX9: [[COPY9:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; GFX9: [[SEXT_INREG5:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY9]], 16
+    ; GFX9: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[SEXT_INREG4]](s32), [[SEXT_INREG5]](s32)
+    ; GFX9: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    %0:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    %1:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    %2:_(<2 x s16>) = G_TRUNC %0
+    %3:_(<2 x s16>) = G_TRUNC %1
+    %4:_(<2 x s16>) = G_SMULH %2, %3
+    %5:_(<2 x s32>) = G_SEXT %4
+    $vgpr0_vgpr1 = COPY %5
+...
+
+---
+name: test_smulh_v2s8
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1, $vgpr2, $vgpr3
+    ; GFX8-LABEL: name: test_smulh_v2s8
+    ; GFX8: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX8: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX8: [[COPY2:%[0-9]+]]:_(s32) = COPY $vgpr2
+    ; GFX8: [[COPY3:%[0-9]+]]:_(s32) = COPY $vgpr3
+    ; GFX8: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX8: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 8
+    ; GFX8: [[SHL:%[0-9]+]]:_(s16) = G_SHL [[TRUNC]], [[C]](s16)
+    ; GFX8: [[ASHR:%[0-9]+]]:_(s16) = G_ASHR [[SHL]], [[C]](s16)
+    ; GFX8: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY2]](s32)
+    ; GFX8: [[SHL1:%[0-9]+]]:_(s16) = G_SHL [[TRUNC1]], [[C]](s16)
+    ; GFX8: [[ASHR1:%[0-9]+]]:_(s16) = G_ASHR [[SHL1]], [[C]](s16)
+    ; GFX8: [[MUL:%[0-9]+]]:_(s16) = G_MUL [[ASHR]], [[ASHR1]]
+    ; GFX8: [[ASHR2:%[0-9]+]]:_(s16) = G_ASHR [[MUL]], [[C]](s16)
+    ; GFX8: [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+    ; GFX8: [[SHL2:%[0-9]+]]:_(s16) = G_SHL [[TRUNC2]], [[C]](s16)
+    ; GFX8: [[ASHR3:%[0-9]+]]:_(s16) = G_ASHR [[SHL2]], [[C]](s16)
+    ; GFX8: [[TRUNC3:%[0-9]+]]:_(s16) = G_TRUNC [[COPY3]](s32)
+    ; GFX8: [[SHL3:%[0-9]+]]:_(s16) = G_SHL [[TRUNC3]], [[C]](s16)
+    ; GFX8: [[ASHR4:%[0-9]+]]:_(s16) = G_ASHR [[SHL3]], [[C]](s16)
+    ; GFX8: [[MUL1:%[0-9]+]]:_(s16) = G_MUL [[ASHR3]], [[ASHR4]]
+    ; GFX8: [[ASHR5:%[0-9]+]]:_(s16) = G_ASHR [[MUL1]], [[C]](s16)
+    ; GFX8: [[C1:%[0-9]+]]:_(s16) = G_CONSTANT i16 255
+    ; GFX8: [[COPY4:%[0-9]+]]:_(s16) = COPY [[ASHR2]](s16)
+    ; GFX8: [[AND:%[0-9]+]]:_(s16) = G_AND [[COPY4]], [[C1]]
+    ; GFX8: [[COPY5:%[0-9]+]]:_(s16) = COPY [[ASHR5]](s16)
+    ; GFX8: [[AND1:%[0-9]+]]:_(s16) = G_AND [[COPY5]], [[C1]]
+    ; GFX8: [[SHL4:%[0-9]+]]:_(s16) = G_SHL [[AND1]], [[C]](s16)
+    ; GFX8: [[OR:%[0-9]+]]:_(s16) = G_OR [[AND]], [[SHL4]]
+    ; GFX8: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[OR]](s16)
+    ; GFX8: $vgpr0 = COPY [[ANYEXT]](s32)
+    ; GFX9-LABEL: name: test_smulh_v2s8
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9: [[COPY2:%[0-9]+]]:_(s32) = COPY $vgpr2
+    ; GFX9: [[COPY3:%[0-9]+]]:_(s32) = COPY $vgpr3
+    ; GFX9: [[COPY4:%[0-9]+]]:_(s32) = COPY [[COPY]](s32)
+    ; GFX9: [[SEXT_INREG:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY4]], 8
+    ; GFX9: [[COPY5:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; GFX9: [[SEXT_INREG1:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY5]], 8
+    ; GFX9: [[COPY6:%[0-9]+]]:_(s32) = COPY [[SEXT_INREG]](s32)
+    ; GFX9: [[COPY7:%[0-9]+]]:_(s32) = COPY [[SEXT_INREG1]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY6]](s32), [[COPY7]](s32)
+    ; GFX9: [[COPY8:%[0-9]+]]:_(s32) = COPY [[COPY2]](s32)
+    ; GFX9: [[SEXT_INREG2:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY8]], 8
+    ; GFX9: [[COPY9:%[0-9]+]]:_(s32) = COPY [[COPY3]](s32)
+    ; GFX9: [[SEXT_INREG3:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY9]], 8
+    ; GFX9: [[COPY10:%[0-9]+]]:_(s32) = COPY [[SEXT_INREG2]](s32)
+    ; GFX9: [[COPY11:%[0-9]+]]:_(s32) = COPY [[SEXT_INREG3]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC1:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY10]](s32), [[COPY11]](s32)
+    ; GFX9: [[MUL:%[0-9]+]]:_(<2 x s16>) = G_MUL [[BUILD_VECTOR_TRUNC]], [[BUILD_VECTOR_TRUNC1]]
+    ; GFX9: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 8
+    ; GFX9: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 8
+    ; GFX9: [[COPY12:%[0-9]+]]:_(s32) = COPY [[C1]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC2:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY12]](s32), [[C1]](s32)
+    ; GFX9: [[ASHR:%[0-9]+]]:_(<2 x s16>) = G_ASHR [[MUL]], [[BUILD_VECTOR_TRUNC2]](<2 x s16>)
+    ; GFX9: [[BITCAST:%[0-9]+]]:_(s32) = G_BITCAST [[ASHR]](<2 x s16>)
+    ; GFX9: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[BITCAST]](s32)
+    ; GFX9: [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX9: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST]], [[C2]](s32)
+    ; GFX9: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR]](s32)
+    ; GFX9: [[C3:%[0-9]+]]:_(s16) = G_CONSTANT i16 255
+    ; GFX9: [[COPY13:%[0-9]+]]:_(s16) = COPY [[TRUNC]](s16)
+    ; GFX9: [[AND:%[0-9]+]]:_(s16) = G_AND [[COPY13]], [[C3]]
+    ; GFX9: [[COPY14:%[0-9]+]]:_(s16) = COPY [[TRUNC1]](s16)
+    ; GFX9: [[AND1:%[0-9]+]]:_(s16) = G_AND [[COPY14]], [[C3]]
+    ; GFX9: [[SHL:%[0-9]+]]:_(s16) = G_SHL [[AND1]], [[C]](s16)
+    ; GFX9: [[OR:%[0-9]+]]:_(s16) = G_OR [[AND]], [[SHL]]
+    ; GFX9: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[OR]](s16)
+    ; GFX9: $vgpr0 = COPY [[ANYEXT]](s32)
+    %0:_(s32) = COPY $vgpr0
+    %1:_(s32) = COPY $vgpr1
+    %2:_(s32) = COPY $vgpr2
+    %3:_(s32) = COPY $vgpr3
+    %5:_(s8) = G_TRUNC %0
+    %6:_(s8) = G_TRUNC %1
+    %7:_(s8) = G_TRUNC %2
+    %8:_(s8) = G_TRUNC %3
+    %11:_(<2 x s8>) = G_BUILD_VECTOR %5, %6
+    %12:_(<2 x s8>) = G_BUILD_VECTOR %7, %8
+    %13:_(<2 x s8>) = G_SMULH %11, %12
+    %14:_(s8), %15:_(s8) = G_UNMERGE_VALUES %13
+    %17:_(s16) = G_MERGE_VALUES %14, %15
+    %18:_(s32) = G_ANYEXT %17
+    $vgpr0 = COPY %18
+
+...
+
+---
+name: test_smulh_v4s8
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+    ; GFX8-LABEL: name: test_smulh_v4s8
+    ; GFX8: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX8: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX8: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 8
+    ; GFX8: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[COPY]], [[C]](s32)
+    ; GFX8: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX8: [[LSHR1:%[0-9]+]]:_(s32) = G_LSHR [[COPY]], [[C1]](s32)
+    ; GFX8: [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 24
+    ; GFX8: [[LSHR2:%[0-9]+]]:_(s32) = G_LSHR [[COPY]], [[C2]](s32)
+    ; GFX8: [[LSHR3:%[0-9]+]]:_(s32) = G_LSHR [[COPY1]], [[C]](s32)
+    ; GFX8: [[LSHR4:%[0-9]+]]:_(s32) = G_LSHR [[COPY1]], [[C1]](s32)
+    ; GFX8: [[LSHR5:%[0-9]+]]:_(s32) = G_LSHR [[COPY1]], [[C2]](s32)
+    ; GFX8: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX8: [[C3:%[0-9]+]]:_(s16) = G_CONSTANT i16 8
+    ; GFX8: [[SHL:%[0-9]+]]:_(s16) = G_SHL [[TRUNC]], [[C3]](s16)
+    ; GFX8: [[ASHR:%[0-9]+]]:_(s16) = G_ASHR [[SHL]], [[C3]](s16)
+    ; GFX8: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+    ; GFX8: [[SHL1:%[0-9]+]]:_(s16) = G_SHL [[TRUNC1]], [[C3]](s16)
+    ; GFX8: [[ASHR1:%[0-9]+]]:_(s16) = G_ASHR [[SHL1]], [[C3]](s16)
+    ; GFX8: [[MUL:%[0-9]+]]:_(s16) = G_MUL [[ASHR]], [[ASHR1]]
+    ; GFX8: [[ASHR2:%[0-9]+]]:_(s16) = G_ASHR [[MUL]], [[C3]](s16)
+    ; GFX8: [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR]](s32)
+    ; GFX8: [[SHL2:%[0-9]+]]:_(s16) = G_SHL [[TRUNC2]], [[C3]](s16)
+    ; GFX8: [[ASHR3:%[0-9]+]]:_(s16) = G_ASHR [[SHL2]], [[C3]](s16)
+    ; GFX8: [[TRUNC3:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR3]](s32)
+    ; GFX8: [[SHL3:%[0-9]+]]:_(s16) = G_SHL [[TRUNC3]], [[C3]](s16)
+    ; GFX8: [[ASHR4:%[0-9]+]]:_(s16) = G_ASHR [[SHL3]], [[C3]](s16)
+    ; GFX8: [[MUL1:%[0-9]+]]:_(s16) = G_MUL [[ASHR3]], [[ASHR4]]
+    ; GFX8: [[ASHR5:%[0-9]+]]:_(s16) = G_ASHR [[MUL1]], [[C3]](s16)
+    ; GFX8: [[TRUNC4:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR1]](s32)
+    ; GFX8: [[SHL4:%[0-9]+]]:_(s16) = G_SHL [[TRUNC4]], [[C3]](s16)
+    ; GFX8: [[ASHR6:%[0-9]+]]:_(s16) = G_ASHR [[SHL4]], [[C3]](s16)
+    ; GFX8: [[TRUNC5:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR4]](s32)
+    ; GFX8: [[SHL5:%[0-9]+]]:_(s16) = G_SHL [[TRUNC5]], [[C3]](s16)
+    ; GFX8: [[ASHR7:%[0-9]+]]:_(s16) = G_ASHR [[SHL5]], [[C3]](s16)
+    ; GFX8: [[MUL2:%[0-9]+]]:_(s16) = G_MUL [[ASHR6]], [[ASHR7]]
+    ; GFX8: [[ASHR8:%[0-9]+]]:_(s16) = G_ASHR [[MUL2]], [[C3]](s16)
+    ; GFX8: [[TRUNC6:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR2]](s32)
+    ; GFX8: [[SHL6:%[0-9]+]]:_(s16) = G_SHL [[TRUNC6]], [[C3]](s16)
+    ; GFX8: [[ASHR9:%[0-9]+]]:_(s16) = G_ASHR [[SHL6]], [[C3]](s16)
+    ; GFX8: [[TRUNC7:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR5]](s32)
+    ; GFX8: [[SHL7:%[0-9]+]]:_(s16) = G_SHL [[TRUNC7]], [[C3]](s16)
+    ; GFX8: [[ASHR10:%[0-9]+]]:_(s16) = G_ASHR [[SHL7]], [[C3]](s16)
+    ; GFX8: [[MUL3:%[0-9]+]]:_(s16) = G_MUL [[ASHR9]], [[ASHR10]]
+    ; GFX8: [[ASHR11:%[0-9]+]]:_(s16) = G_ASHR [[MUL3]], [[C3]](s16)
+    ; GFX8: [[C4:%[0-9]+]]:_(s32) = G_CONSTANT i32 255
+    ; GFX8: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[ASHR2]](s16)
+    ; GFX8: [[AND:%[0-9]+]]:_(s32) = G_AND [[ANYEXT]], [[C4]]
+    ; GFX8: [[ANYEXT1:%[0-9]+]]:_(s32) = G_ANYEXT [[ASHR5]](s16)
+    ; GFX8: [[AND1:%[0-9]+]]:_(s32) = G_AND [[ANYEXT1]], [[C4]]
+    ; GFX8: [[SHL8:%[0-9]+]]:_(s32) = G_SHL [[AND1]], [[C]](s32)
+    ; GFX8: [[OR:%[0-9]+]]:_(s32) = G_OR [[AND]], [[SHL8]]
+    ; GFX8: [[ANYEXT2:%[0-9]+]]:_(s32) = G_ANYEXT [[ASHR8]](s16)
+    ; GFX8: [[AND2:%[0-9]+]]:_(s32) = G_AND [[ANYEXT2]], [[C4]]
+    ; GFX8: [[SHL9:%[0-9]+]]:_(s32) = G_SHL [[AND2]], [[C1]](s32)
+    ; GFX8: [[OR1:%[0-9]+]]:_(s32) = G_OR [[OR]], [[SHL9]]
+    ; GFX8: [[ANYEXT3:%[0-9]+]]:_(s32) = G_ANYEXT [[ASHR11]](s16)
+    ; GFX8: [[AND3:%[0-9]+]]:_(s32) = G_AND [[ANYEXT3]], [[C4]]
+    ; GFX8: [[SHL10:%[0-9]+]]:_(s32) = G_SHL [[AND3]], [[C2]](s32)
+    ; GFX8: [[OR2:%[0-9]+]]:_(s32) = G_OR [[OR1]], [[SHL10]]
+    ; GFX8: $vgpr0 = COPY [[OR2]](s32)
+    ; GFX9-LABEL: name: test_smulh_v4s8
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 8
+    ; GFX9: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[COPY]], [[C]](s32)
+    ; GFX9: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX9: [[LSHR1:%[0-9]+]]:_(s32) = G_LSHR [[COPY]], [[C1]](s32)
+    ; GFX9: [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 24
+    ; GFX9: [[LSHR2:%[0-9]+]]:_(s32) = G_LSHR [[COPY]], [[C2]](s32)
+    ; GFX9: [[LSHR3:%[0-9]+]]:_(s32) = G_LSHR [[COPY1]], [[C]](s32)
+    ; GFX9: [[LSHR4:%[0-9]+]]:_(s32) = G_LSHR [[COPY1]], [[C1]](s32)
+    ; GFX9: [[LSHR5:%[0-9]+]]:_(s32) = G_LSHR [[COPY1]], [[C2]](s32)
+    ; GFX9: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY]](s32)
+    ; GFX9: [[SEXT_INREG:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY2]], 8
+    ; GFX9: [[COPY3:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; GFX9: [[SEXT_INREG1:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY3]], 8
+    ; GFX9: [[COPY4:%[0-9]+]]:_(s32) = COPY [[SEXT_INREG]](s32)
+    ; GFX9: [[COPY5:%[0-9]+]]:_(s32) = COPY [[SEXT_INREG1]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY4]](s32), [[COPY5]](s32)
+    ; GFX9: [[COPY6:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; GFX9: [[SEXT_INREG2:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY6]], 8
+    ; GFX9: [[COPY7:%[0-9]+]]:_(s32) = COPY [[LSHR3]](s32)
+    ; GFX9: [[SEXT_INREG3:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY7]], 8
+    ; GFX9: [[COPY8:%[0-9]+]]:_(s32) = COPY [[SEXT_INREG2]](s32)
+    ; GFX9: [[COPY9:%[0-9]+]]:_(s32) = COPY [[SEXT_INREG3]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC1:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY8]](s32), [[COPY9]](s32)
+    ; GFX9: [[MUL:%[0-9]+]]:_(<2 x s16>) = G_MUL [[BUILD_VECTOR_TRUNC]], [[BUILD_VECTOR_TRUNC1]]
+    ; GFX9: [[COPY10:%[0-9]+]]:_(s32) = COPY [[C]](s32)
+    ; GFX9: [[COPY11:%[0-9]+]]:_(s32) = COPY [[C]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC2:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY10]](s32), [[COPY11]](s32)
+    ; GFX9: [[ASHR:%[0-9]+]]:_(<2 x s16>) = G_ASHR [[MUL]], [[BUILD_VECTOR_TRUNC2]](<2 x s16>)
+    ; GFX9: [[COPY12:%[0-9]+]]:_(s32) = COPY [[LSHR1]](s32)
+    ; GFX9: [[SEXT_INREG4:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY12]], 8
+    ; GFX9: [[COPY13:%[0-9]+]]:_(s32) = COPY [[LSHR2]](s32)
+    ; GFX9: [[SEXT_INREG5:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY13]], 8
+    ; GFX9: [[COPY14:%[0-9]+]]:_(s32) = COPY [[SEXT_INREG4]](s32)
+    ; GFX9: [[COPY15:%[0-9]+]]:_(s32) = COPY [[SEXT_INREG5]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC3:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY14]](s32), [[COPY15]](s32)
+    ; GFX9: [[COPY16:%[0-9]+]]:_(s32) = COPY [[LSHR4]](s32)
+    ; GFX9: [[SEXT_INREG6:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY16]], 8
+    ; GFX9: [[COPY17:%[0-9]+]]:_(s32) = COPY [[LSHR5]](s32)
+    ; GFX9: [[SEXT_INREG7:%[0-9]+]]:_(s32) = G_SEXT_INREG [[COPY17]], 8
+    ; GFX9: [[COPY18:%[0-9]+]]:_(s32) = COPY [[SEXT_INREG6]](s32)
+    ; GFX9: [[COPY19:%[0-9]+]]:_(s32) = COPY [[SEXT_INREG7]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC4:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY18]](s32), [[COPY19]](s32)
+    ; GFX9: [[MUL1:%[0-9]+]]:_(<2 x s16>) = G_MUL [[BUILD_VECTOR_TRUNC3]], [[BUILD_VECTOR_TRUNC4]]
+    ; GFX9: [[COPY20:%[0-9]+]]:_(s32) = COPY [[C]](s32)
+    ; GFX9: [[COPY21:%[0-9]+]]:_(s32) = COPY [[C]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC5:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY20]](s32), [[COPY21]](s32)
+    ; GFX9: [[ASHR1:%[0-9]+]]:_(<2 x s16>) = G_ASHR [[MUL1]], [[BUILD_VECTOR_TRUNC5]](<2 x s16>)
+    ; GFX9: [[BITCAST:%[0-9]+]]:_(s32) = G_BITCAST [[ASHR]](<2 x s16>)
+    ; GFX9: [[LSHR6:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST]], [[C1]](s32)
+    ; GFX9: [[BITCAST1:%[0-9]+]]:_(s32) = G_BITCAST [[ASHR1]](<2 x s16>)
+    ; GFX9: [[LSHR7:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST1]], [[C1]](s32)
+    ; GFX9: [[C3:%[0-9]+]]:_(s32) = G_CONSTANT i32 255
+    ; GFX9: [[COPY22:%[0-9]+]]:_(s32) = COPY [[BITCAST]](s32)
+    ; GFX9: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY22]], [[C3]]
+    ; GFX9: [[COPY23:%[0-9]+]]:_(s32) = COPY [[LSHR6]](s32)
+    ; GFX9: [[AND1:%[0-9]+]]:_(s32) = G_AND [[COPY23]], [[C3]]
+    ; GFX9: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[AND1]], [[C]](s32)
+    ; GFX9: [[OR:%[0-9]+]]:_(s32) = G_OR [[AND]], [[SHL]]
+    ; GFX9: [[COPY24:%[0-9]+]]:_(s32) = COPY [[BITCAST1]](s32)
+    ; GFX9: [[AND2:%[0-9]+]]:_(s32) = G_AND [[COPY24]], [[C3]]
+    ; GFX9: [[SHL1:%[0-9]+]]:_(s32) = G_SHL [[AND2]], [[C1]](s32)
+    ; GFX9: [[OR1:%[0-9]+]]:_(s32) = G_OR [[OR]], [[SHL1]]
+    ; GFX9: [[COPY25:%[0-9]+]]:_(s32) = COPY [[LSHR7]](s32)
+    ; GFX9: [[AND3:%[0-9]+]]:_(s32) = G_AND [[COPY25]], [[C3]]
+    ; GFX9: [[SHL2:%[0-9]+]]:_(s32) = G_SHL [[AND3]], [[C2]](s32)
+    ; GFX9: [[OR2:%[0-9]+]]:_(s32) = G_OR [[OR1]], [[SHL2]]
+    ; GFX9: $vgpr0 = COPY [[OR2]](s32)
+    %0:_(s32) = COPY $vgpr0
+    %1:_(s32) = COPY $vgpr1
+    %2:_(s8), %3:_(s8), %4:_(s8), %5:_(s8) = G_UNMERGE_VALUES %0
+    %6:_(s8), %7:_(s8), %8:_(s8), %9:_(s8) = G_UNMERGE_VALUES %1
+    %10:_(<4 x s8>) = G_BUILD_VECTOR %2:_(s8), %3:_(s8), %4:_(s8), %5:_(s8)
+    %11:_(<4 x s8>) = G_BUILD_VECTOR %6:_(s8), %7:_(s8), %8:_(s8), %9:_(s8)
+    %12:_(<4 x s8>) = G_SMULH %10:_, %11:_
+    %13:_(s8), %14:_(s8), %15:_(s8), %16:_(s8) = G_UNMERGE_VALUES %12:_(<4 x s8>)
+    %17:_(s32) = G_MERGE_VALUES %13, %14, %15, %16
+    $vgpr0 = COPY %17
+...
diff --git a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-umulh.mir b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-umulh.mir
--- a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-umulh.mir
+++ b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-umulh.mir
@@ -1,5 +1,6 @@
 # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
-# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=fiji -O0 -run-pass=legalizer %s -o - | FileCheck %s
+# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=fiji -global-isel-abort=0 -O0 -run-pass=legalizer %s -o - | FileCheck %s --check-prefix=GFX8
+# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx906 -global-isel-abort=0 -O0 -run-pass=legalizer %s -o - | FileCheck %s --check-prefix=GFX9
 
 ---
 name: test_umulh_s32
@@ -7,11 +8,16 @@
   bb.0:
     liveins: $vgpr0, $vgpr1
 
-    ; CHECK-LABEL: name: test_umulh_s32
-    ; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
-    ; CHECK: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
-    ; CHECK: [[UMULH:%[0-9]+]]:_(s32) = G_UMULH [[COPY]], [[COPY1]]
-    ; CHECK: $vgpr0 = COPY [[UMULH]](s32)
+    ; GFX8-LABEL: name: test_umulh_s32
+    ; GFX8: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX8: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX8: [[UMULH:%[0-9]+]]:_(s32) = G_UMULH [[COPY]], [[COPY1]]
+    ; GFX8: $vgpr0 = COPY [[UMULH]](s32)
+    ; GFX9-LABEL: name: test_umulh_s32
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9: [[UMULH:%[0-9]+]]:_(s32) = G_UMULH [[COPY]], [[COPY1]]
+    ; GFX9: $vgpr0 = COPY [[UMULH]](s32)
     %0:_(s32) = COPY $vgpr0
     %1:_(s32) = COPY $vgpr1
     %2:_(s32) = G_UMULH %0, %1
@@ -24,15 +30,24 @@
   bb.0:
     liveins: $vgpr0_vgpr1, $vgpr2_vgpr3
 
-    ; CHECK-LABEL: name: test_umulh_v2s32
-    ; CHECK: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
-    ; CHECK: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
-    ; CHECK: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
-    ; CHECK: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
-    ; CHECK: [[UMULH:%[0-9]+]]:_(s32) = G_UMULH [[UV]], [[UV2]]
-    ; CHECK: [[UMULH1:%[0-9]+]]:_(s32) = G_UMULH [[UV1]], [[UV3]]
-    ; CHECK: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[UMULH]](s32), [[UMULH1]](s32)
-    ; CHECK: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    ; GFX8-LABEL: name: test_umulh_v2s32
+    ; GFX8: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; GFX8: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; GFX8: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; GFX8: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; GFX8: [[UMULH:%[0-9]+]]:_(s32) = G_UMULH [[UV]], [[UV2]]
+    ; GFX8: [[UMULH1:%[0-9]+]]:_(s32) = G_UMULH [[UV1]], [[UV3]]
+    ; GFX8: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[UMULH]](s32), [[UMULH1]](s32)
+    ; GFX8: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    ; GFX9-LABEL: name: test_umulh_v2s32
+    ; GFX9: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; GFX9: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; GFX9: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; GFX9: [[UMULH:%[0-9]+]]:_(s32) = G_UMULH [[UV]], [[UV2]]
+    ; GFX9: [[UMULH1:%[0-9]+]]:_(s32) = G_UMULH [[UV1]], [[UV3]]
+    ; GFX9: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[UMULH]](s32), [[UMULH1]](s32)
+    ; GFX9: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
     %0:_(<2 x s32>) = COPY $vgpr0_vgpr1
     %1:_(<2 x s32>) = COPY $vgpr2_vgpr3
     %2:_(<2 x s32>) = G_UMULH %0, %1
@@ -45,36 +60,625 @@
   bb.0:
     liveins: $vgpr0_vgpr1, $vgpr2_vgpr3
 
-    ; CHECK-LABEL: name: test_umulh_s64
-    ; CHECK: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
-    ; CHECK: [[COPY1:%[0-9]+]]:_(s64) = COPY $vgpr2_vgpr3
-    ; CHECK: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](s64)
-    ; CHECK: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](s64)
-    ; CHECK: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[UV1]], [[UV2]]
-    ; CHECK: [[MUL1:%[0-9]+]]:_(s32) = G_MUL [[UV]], [[UV3]]
-    ; CHECK: [[UMULH:%[0-9]+]]:_(s32) = G_UMULH [[UV]], [[UV2]]
-    ; CHECK: [[UADDO:%[0-9]+]]:_(s32), [[UADDO1:%[0-9]+]]:_(s1) = G_UADDO [[MUL]], [[MUL1]]
-    ; CHECK: [[ZEXT:%[0-9]+]]:_(s32) = G_ZEXT [[UADDO1]](s1)
-    ; CHECK: [[UADDO2:%[0-9]+]]:_(s32), [[UADDO3:%[0-9]+]]:_(s1) = G_UADDO [[UADDO]], [[UMULH]]
-    ; CHECK: [[ZEXT1:%[0-9]+]]:_(s32) = G_ZEXT [[UADDO3]](s1)
-    ; CHECK: [[ADD:%[0-9]+]]:_(s32) = G_ADD [[ZEXT]], [[ZEXT1]]
-    ; CHECK: [[MUL2:%[0-9]+]]:_(s32) = G_MUL [[UV1]], [[UV3]]
-    ; CHECK: [[UMULH1:%[0-9]+]]:_(s32) = G_UMULH [[UV1]], [[UV2]]
-    ; CHECK: [[UMULH2:%[0-9]+]]:_(s32) = G_UMULH [[UV]], [[UV3]]
-    ; CHECK: [[UADDO4:%[0-9]+]]:_(s32), [[UADDO5:%[0-9]+]]:_(s1) = G_UADDO [[MUL2]], [[UMULH1]]
-    ; CHECK: [[ZEXT2:%[0-9]+]]:_(s32) = G_ZEXT [[UADDO5]](s1)
-    ; CHECK: [[UADDO6:%[0-9]+]]:_(s32), [[UADDO7:%[0-9]+]]:_(s1) = G_UADDO [[UADDO4]], [[UMULH2]]
-    ; CHECK: [[ZEXT3:%[0-9]+]]:_(s32) = G_ZEXT [[UADDO7]](s1)
-    ; CHECK: [[ADD1:%[0-9]+]]:_(s32) = G_ADD [[ZEXT2]], [[ZEXT3]]
-    ; CHECK: [[UADDO8:%[0-9]+]]:_(s32), [[UADDO9:%[0-9]+]]:_(s1) = G_UADDO [[UADDO6]], [[ADD]]
-    ; CHECK: [[ZEXT4:%[0-9]+]]:_(s32) = G_ZEXT [[UADDO9]](s1)
-    ; CHECK: [[ADD2:%[0-9]+]]:_(s32) = G_ADD [[ADD1]], [[ZEXT4]]
-    ; CHECK: [[UMULH3:%[0-9]+]]:_(s32) = G_UMULH [[UV1]], [[UV3]]
-    ; CHECK: [[ADD3:%[0-9]+]]:_(s32) = G_ADD [[UMULH3]], [[ADD2]]
-    ; CHECK: [[MV:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UADDO8]](s32), [[ADD3]](s32)
-    ; CHECK: $vgpr0_vgpr1 = COPY [[MV]](s64)
+    ; GFX8-LABEL: name: test_umulh_s64
+    ; GFX8: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
+    ; GFX8: [[COPY1:%[0-9]+]]:_(s64) = COPY $vgpr2_vgpr3
+    ; GFX8: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](s64)
+    ; GFX8: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](s64)
+    ; GFX8: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[UV1]], [[UV2]]
+    ; GFX8: [[MUL1:%[0-9]+]]:_(s32) = G_MUL [[UV]], [[UV3]]
+    ; GFX8: [[UMULH:%[0-9]+]]:_(s32) = G_UMULH [[UV]], [[UV2]]
+    ; GFX8: [[UADDO:%[0-9]+]]:_(s32), [[UADDO1:%[0-9]+]]:_(s1) = G_UADDO [[MUL]], [[MUL1]]
+    ; GFX8: [[ZEXT:%[0-9]+]]:_(s32) = G_ZEXT [[UADDO1]](s1)
+    ; GFX8: [[UADDO2:%[0-9]+]]:_(s32), [[UADDO3:%[0-9]+]]:_(s1) = G_UADDO [[UADDO]], [[UMULH]]
+    ; GFX8: [[ZEXT1:%[0-9]+]]:_(s32) = G_ZEXT [[UADDO3]](s1)
+    ; GFX8: [[ADD:%[0-9]+]]:_(s32) = G_ADD [[ZEXT]], [[ZEXT1]]
+    ; GFX8: [[MUL2:%[0-9]+]]:_(s32) = G_MUL [[UV1]], [[UV3]]
+    ; GFX8: [[UMULH1:%[0-9]+]]:_(s32) = G_UMULH [[UV1]], [[UV2]]
+    ; GFX8: [[UMULH2:%[0-9]+]]:_(s32) = G_UMULH [[UV]], [[UV3]]
+    ; GFX8: [[UADDO4:%[0-9]+]]:_(s32), [[UADDO5:%[0-9]+]]:_(s1) = G_UADDO [[MUL2]], [[UMULH1]]
+    ; GFX8: [[ZEXT2:%[0-9]+]]:_(s32) = G_ZEXT [[UADDO5]](s1)
+    ; GFX8: [[UADDO6:%[0-9]+]]:_(s32), [[UADDO7:%[0-9]+]]:_(s1) = G_UADDO [[UADDO4]], [[UMULH2]]
+    ; GFX8: [[ZEXT3:%[0-9]+]]:_(s32) = G_ZEXT [[UADDO7]](s1)
+    ; GFX8: [[ADD1:%[0-9]+]]:_(s32) = G_ADD [[ZEXT2]], [[ZEXT3]]
+    ; GFX8: [[UADDO8:%[0-9]+]]:_(s32), [[UADDO9:%[0-9]+]]:_(s1) = G_UADDO [[UADDO6]], [[ADD]]
+    ; GFX8: [[ZEXT4:%[0-9]+]]:_(s32) = G_ZEXT [[UADDO9]](s1)
+    ; GFX8: [[ADD2:%[0-9]+]]:_(s32) = G_ADD [[ADD1]], [[ZEXT4]]
+    ; GFX8: [[UMULH3:%[0-9]+]]:_(s32) = G_UMULH [[UV1]], [[UV3]]
+    ; GFX8: [[ADD3:%[0-9]+]]:_(s32) = G_ADD [[UMULH3]], [[ADD2]]
+    ; GFX8: [[MV:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UADDO8]](s32), [[ADD3]](s32)
+    ; GFX8: $vgpr0_vgpr1 = COPY [[MV]](s64)
+    ; GFX9-LABEL: name: test_umulh_s64
+    ; GFX9: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s64) = COPY $vgpr2_vgpr3
+    ; GFX9: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](s64)
+    ; GFX9: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](s64)
+    ; GFX9: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[UV1]], [[UV2]]
+    ; GFX9: [[MUL1:%[0-9]+]]:_(s32) = G_MUL [[UV]], [[UV3]]
+    ; GFX9: [[UMULH:%[0-9]+]]:_(s32) = G_UMULH [[UV]], [[UV2]]
+    ; GFX9: [[UADDO:%[0-9]+]]:_(s32), [[UADDO1:%[0-9]+]]:_(s1) = G_UADDO [[MUL]], [[MUL1]]
+    ; GFX9: [[ZEXT:%[0-9]+]]:_(s32) = G_ZEXT [[UADDO1]](s1)
+    ; GFX9: [[UADDO2:%[0-9]+]]:_(s32), [[UADDO3:%[0-9]+]]:_(s1) = G_UADDO [[UADDO]], [[UMULH]]
+    ; GFX9: [[ZEXT1:%[0-9]+]]:_(s32) = G_ZEXT [[UADDO3]](s1)
+    ; GFX9: [[ADD:%[0-9]+]]:_(s32) = G_ADD [[ZEXT]], [[ZEXT1]]
+    ; GFX9: [[MUL2:%[0-9]+]]:_(s32) = G_MUL [[UV1]], [[UV3]]
+    ; GFX9: [[UMULH1:%[0-9]+]]:_(s32) = G_UMULH [[UV1]], [[UV2]]
+    ; GFX9: [[UMULH2:%[0-9]+]]:_(s32) = G_UMULH [[UV]], [[UV3]]
+    ; GFX9: [[UADDO4:%[0-9]+]]:_(s32), [[UADDO5:%[0-9]+]]:_(s1) = G_UADDO [[MUL2]], [[UMULH1]]
+    ; GFX9: [[ZEXT2:%[0-9]+]]:_(s32) = G_ZEXT [[UADDO5]](s1)
+    ; GFX9: [[UADDO6:%[0-9]+]]:_(s32), [[UADDO7:%[0-9]+]]:_(s1) = G_UADDO [[UADDO4]], [[UMULH2]]
+    ; GFX9: [[ZEXT3:%[0-9]+]]:_(s32) = G_ZEXT [[UADDO7]](s1)
+    ; GFX9: [[ADD1:%[0-9]+]]:_(s32) = G_ADD [[ZEXT2]], [[ZEXT3]]
+    ; GFX9: [[UADDO8:%[0-9]+]]:_(s32), [[UADDO9:%[0-9]+]]:_(s1) = G_UADDO [[UADDO6]], [[ADD]]
+    ; GFX9: [[ZEXT4:%[0-9]+]]:_(s32) = G_ZEXT [[UADDO9]](s1)
+    ; GFX9: [[ADD2:%[0-9]+]]:_(s32) = G_ADD [[ADD1]], [[ZEXT4]]
+    ; GFX9: [[UMULH3:%[0-9]+]]:_(s32) = G_UMULH [[UV1]], [[UV3]]
+    ; GFX9: [[ADD3:%[0-9]+]]:_(s32) = G_ADD [[UMULH3]], [[ADD2]]
+    ; GFX9: [[MV:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UADDO8]](s32), [[ADD3]](s32)
+    ; GFX9: $vgpr0_vgpr1 = COPY [[MV]](s64)
     %0:_(s64) = COPY $vgpr0_vgpr1
     %1:_(s64) = COPY $vgpr2_vgpr3
     %2:_(s64) = G_UMULH %0, %1
     $vgpr0_vgpr1 = COPY %2
 ...
+
+---
+name: test_umulh_s16
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+
+    ; GFX8-LABEL: name: test_umulh_s16
+    ; GFX8: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX8: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX8: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 65535
+    ; GFX8: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY]](s32)
+    ; GFX8: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY2]], [[C]]
+    ; GFX8: [[COPY3:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; GFX8: [[AND1:%[0-9]+]]:_(s32) = G_AND [[COPY3]], [[C]]
+    ; GFX8: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[AND]], [[AND1]]
+    ; GFX8: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX8: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[MUL]], [[C1]](s32)
+    ; GFX8: [[COPY4:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; GFX8: [[AND2:%[0-9]+]]:_(s32) = G_AND [[COPY4]], [[C]]
+    ; GFX8: $vgpr0 = COPY [[AND2]](s32)
+    ; GFX9-LABEL: name: test_umulh_s16
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 65535
+    ; GFX9: [[COPY2:%[0-9]+]]:_(s32) = COPY [[COPY]](s32)
+    ; GFX9: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY2]], [[C]]
+    ; GFX9: [[COPY3:%[0-9]+]]:_(s32) = COPY [[COPY1]](s32)
+    ; GFX9: [[AND1:%[0-9]+]]:_(s32) = G_AND [[COPY3]], [[C]]
+    ; GFX9: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[AND]], [[AND1]]
+    ; GFX9: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX9: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[MUL]], [[C1]](s32)
+    ; GFX9: [[COPY4:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; GFX9: [[AND2:%[0-9]+]]:_(s32) = G_AND [[COPY4]], [[C]]
+    ; GFX9: $vgpr0 = COPY [[AND2]](s32)
+    %0:_(s32) = COPY $vgpr0
+    %1:_(s32) = COPY $vgpr1
+    %2:_(s16) = G_TRUNC %0
+    %3:_(s16) = G_TRUNC %1
+    %4:_(s16) = G_UMULH %2, %3
+    %5:_(s32) = G_ZEXT %4
+    $vgpr0 = COPY %5
+...
+
+---
+name: test_umulh_s8
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+
+    ; GFX8-LABEL: name: test_umulh_s8
+    ; GFX8: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX8: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX8: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 255
+    ; GFX8: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX8: [[AND:%[0-9]+]]:_(s16) = G_AND [[TRUNC]], [[C]]
+    ; GFX8: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+    ; GFX8: [[AND1:%[0-9]+]]:_(s16) = G_AND [[TRUNC1]], [[C]]
+    ; GFX8: [[MUL:%[0-9]+]]:_(s16) = G_MUL [[AND]], [[AND1]]
+    ; GFX8: [[C1:%[0-9]+]]:_(s16) = G_CONSTANT i16 8
+    ; GFX8: [[LSHR:%[0-9]+]]:_(s16) = G_LSHR [[MUL]], [[C1]](s16)
+    ; GFX8: [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 255
+    ; GFX8: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[LSHR]](s16)
+    ; GFX8: [[AND2:%[0-9]+]]:_(s32) = G_AND [[ANYEXT]], [[C2]]
+    ; GFX8: $vgpr0 = COPY [[AND2]](s32)
+    ; GFX9-LABEL: name: test_umulh_s8
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 255
+    ; GFX9: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX9: [[AND:%[0-9]+]]:_(s16) = G_AND [[TRUNC]], [[C]]
+    ; GFX9: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+    ; GFX9: [[AND1:%[0-9]+]]:_(s16) = G_AND [[TRUNC1]], [[C]]
+    ; GFX9: [[MUL:%[0-9]+]]:_(s16) = G_MUL [[AND]], [[AND1]]
+    ; GFX9: [[C1:%[0-9]+]]:_(s16) = G_CONSTANT i16 8
+    ; GFX9: [[LSHR:%[0-9]+]]:_(s16) = G_LSHR [[MUL]], [[C1]](s16)
+    ; GFX9: [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 255
+    ; GFX9: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[LSHR]](s16)
+    ; GFX9: [[AND2:%[0-9]+]]:_(s32) = G_AND [[ANYEXT]], [[C2]]
+    ; GFX9: $vgpr0 = COPY [[AND2]](s32)
+    %0:_(s32) = COPY $vgpr0
+    %1:_(s32) = COPY $vgpr1
+    %2:_(s8) = G_TRUNC %0
+    %3:_(s8) = G_TRUNC %1
+    %4:_(s8) = G_UMULH %2, %3
+    %5:_(s32) = G_ZEXT %4
+    $vgpr0 = COPY %5
+...
+
+---
+name: test_umulh_v2s16
+body: |
+  bb.0:
+    liveins: $vgpr0_vgpr1, $vgpr2_vgpr3
+    ; GFX8-LABEL: name: test_umulh_v2s16
+    ; GFX8: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; GFX8: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; GFX8: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; GFX8: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; GFX8: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 65535
+    ; GFX8: [[COPY2:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; GFX8: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY2]], [[C]]
+    ; GFX8: [[COPY3:%[0-9]+]]:_(s32) = COPY [[UV2]](s32)
+    ; GFX8: [[AND1:%[0-9]+]]:_(s32) = G_AND [[COPY3]], [[C]]
+    ; GFX8: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[AND]], [[AND1]]
+    ; GFX8: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX8: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[MUL]], [[C1]](s32)
+    ; GFX8: [[COPY4:%[0-9]+]]:_(s32) = COPY [[UV1]](s32)
+    ; GFX8: [[AND2:%[0-9]+]]:_(s32) = G_AND [[COPY4]], [[C]]
+    ; GFX8: [[COPY5:%[0-9]+]]:_(s32) = COPY [[UV3]](s32)
+    ; GFX8: [[AND3:%[0-9]+]]:_(s32) = G_AND [[COPY5]], [[C]]
+    ; GFX8: [[MUL1:%[0-9]+]]:_(s32) = G_MUL [[AND2]], [[AND3]]
+    ; GFX8: [[LSHR1:%[0-9]+]]:_(s32) = G_LSHR [[MUL1]], [[C1]](s32)
+    ; GFX8: [[COPY6:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; GFX8: [[AND4:%[0-9]+]]:_(s32) = G_AND [[COPY6]], [[C]]
+    ; GFX8: [[COPY7:%[0-9]+]]:_(s32) = COPY [[LSHR1]](s32)
+    ; GFX8: [[AND5:%[0-9]+]]:_(s32) = G_AND [[COPY7]], [[C]]
+    ; GFX8: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[AND5]], [[C1]](s32)
+    ; GFX8: [[OR:%[0-9]+]]:_(s32) = G_OR [[AND4]], [[SHL]]
+    ; GFX8: [[BITCAST:%[0-9]+]]:_(<2 x s16>) = G_BITCAST [[OR]](s32)
+    ; GFX8: [[BITCAST1:%[0-9]+]]:_(s32) = G_BITCAST [[BITCAST]](<2 x s16>)
+    ; GFX8: [[LSHR2:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST1]], [[C1]](s32)
+    ; GFX8: [[COPY8:%[0-9]+]]:_(s32) = COPY [[BITCAST1]](s32)
+    ; GFX8: [[AND6:%[0-9]+]]:_(s32) = G_AND [[COPY8]], [[C]]
+    ; GFX8: [[COPY9:%[0-9]+]]:_(s32) = COPY [[LSHR2]](s32)
+    ; GFX8: [[AND7:%[0-9]+]]:_(s32) = G_AND [[COPY9]], [[C]]
+    ; GFX8: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[AND6]](s32), [[AND7]](s32)
+    ; GFX8: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    ; GFX9-LABEL: name: test_umulh_v2s16
+    ; GFX9: [[COPY:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    ; GFX9: [[COPY1:%[0-9]+]]:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    ; GFX9: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY]](<2 x s32>)
+    ; GFX9: [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](<2 x s32>)
+    ; GFX9: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 65535
+    ; GFX9: [[COPY2:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; GFX9: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY2]], [[C]]
+    ; GFX9: [[COPY3:%[0-9]+]]:_(s32) = COPY [[UV2]](s32)
+    ; GFX9: [[AND1:%[0-9]+]]:_(s32) = G_AND [[COPY3]], [[C]]
+    ; GFX9: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[AND]], [[AND1]]
+    ; GFX9: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX9: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[MUL]], [[C1]](s32)
+    ; GFX9: [[COPY4:%[0-9]+]]:_(s32) = COPY [[UV1]](s32)
+    ; GFX9: [[AND2:%[0-9]+]]:_(s32) = G_AND [[COPY4]], [[C]]
+    ; GFX9: [[COPY5:%[0-9]+]]:_(s32) = COPY [[UV3]](s32)
+    ; GFX9: [[AND3:%[0-9]+]]:_(s32) = G_AND [[COPY5]], [[C]]
+    ; GFX9: [[MUL1:%[0-9]+]]:_(s32) = G_MUL [[AND2]], [[AND3]]
+    ; GFX9: [[LSHR1:%[0-9]+]]:_(s32) = G_LSHR [[MUL1]], [[C1]](s32)
+    ; GFX9: [[COPY6:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; GFX9: [[COPY7:%[0-9]+]]:_(s32) = COPY [[LSHR1]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY6]](s32), [[COPY7]](s32)
+    ; GFX9: [[BITCAST:%[0-9]+]]:_(s32) = G_BITCAST [[BUILD_VECTOR_TRUNC]](<2 x s16>)
+    ; GFX9: [[LSHR2:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST]], [[C1]](s32)
+    ; GFX9: [[COPY8:%[0-9]+]]:_(s32) = COPY [[BITCAST]](s32)
+    ; GFX9: [[AND4:%[0-9]+]]:_(s32) = G_AND [[COPY8]], [[C]]
+    ; GFX9: [[COPY9:%[0-9]+]]:_(s32) = COPY [[LSHR2]](s32)
+    ; GFX9: [[AND5:%[0-9]+]]:_(s32) = G_AND [[COPY9]], [[C]]
+    ; GFX9: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s32>) = G_BUILD_VECTOR [[AND4]](s32), [[AND5]](s32)
+    ; GFX9: $vgpr0_vgpr1 = COPY [[BUILD_VECTOR]](<2 x s32>)
+    %0:_(<2 x s32>) = COPY $vgpr0_vgpr1
+    %1:_(<2 x s32>) = COPY $vgpr2_vgpr3
+    %2:_(<2 x s16>) = G_TRUNC %0
+    %3:_(<2 x s16>) = G_TRUNC %1
+    %4:_(<2 x s16>) = G_UMULH %2, %3
+    %5:_(<2 x s32>) = G_ZEXT %4
+    $vgpr0_vgpr1 = COPY %5
+...
+
+---
+name: test_umulh_v3s8
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1, $vgpr2, $vgpr3, $vgpr4, $vgpr5
+    ; GFX8-LABEL: name: test_umulh_v3s8
+    ; GFX8: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX8: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX8: [[COPY2:%[0-9]+]]:_(s32) = COPY $vgpr2
+    ; GFX8: [[COPY3:%[0-9]+]]:_(s32) = COPY $vgpr3
+    ; GFX8: [[COPY4:%[0-9]+]]:_(s32) = COPY $vgpr4
+    ; GFX8: [[COPY5:%[0-9]+]]:_(s32) = COPY $vgpr5
+    ; GFX8: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 255
+    ; GFX8: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX8: [[AND:%[0-9]+]]:_(s16) = G_AND [[TRUNC]], [[C]]
+    ; GFX8: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY3]](s32)
+    ; GFX8: [[AND1:%[0-9]+]]:_(s16) = G_AND [[TRUNC1]], [[C]]
+    ; GFX8: [[MUL:%[0-9]+]]:_(s16) = G_MUL [[AND]], [[AND1]]
+    ; GFX8: [[C1:%[0-9]+]]:_(s16) = G_CONSTANT i16 8
+    ; GFX8: [[LSHR:%[0-9]+]]:_(s16) = G_LSHR [[MUL]], [[C1]](s16)
+    ; GFX8: [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+    ; GFX8: [[AND2:%[0-9]+]]:_(s16) = G_AND [[TRUNC2]], [[C]]
+    ; GFX8: [[TRUNC3:%[0-9]+]]:_(s16) = G_TRUNC [[COPY4]](s32)
+    ; GFX8: [[AND3:%[0-9]+]]:_(s16) = G_AND [[TRUNC3]], [[C]]
+    ; GFX8: [[MUL1:%[0-9]+]]:_(s16) = G_MUL [[AND2]], [[AND3]]
+    ; GFX8: [[LSHR1:%[0-9]+]]:_(s16) = G_LSHR [[MUL1]], [[C1]](s16)
+    ; GFX8: [[TRUNC4:%[0-9]+]]:_(s16) = G_TRUNC [[COPY2]](s32)
+    ; GFX8: [[AND4:%[0-9]+]]:_(s16) = G_AND [[TRUNC4]], [[C]]
+    ; GFX8: [[TRUNC5:%[0-9]+]]:_(s16) = G_TRUNC [[COPY5]](s32)
+    ; GFX8: [[AND5:%[0-9]+]]:_(s16) = G_AND [[TRUNC5]], [[C]]
+    ; GFX8: [[MUL2:%[0-9]+]]:_(s16) = G_MUL [[AND4]], [[AND5]]
+    ; GFX8: [[LSHR2:%[0-9]+]]:_(s16) = G_LSHR [[MUL2]], [[C1]](s16)
+    ; GFX8: [[DEF:%[0-9]+]]:_(s32) = G_IMPLICIT_DEF
+    ; GFX8: [[COPY6:%[0-9]+]]:_(s16) = COPY [[LSHR]](s16)
+    ; GFX8: [[AND6:%[0-9]+]]:_(s16) = G_AND [[COPY6]], [[C]]
+    ; GFX8: [[COPY7:%[0-9]+]]:_(s16) = COPY [[LSHR1]](s16)
+    ; GFX8: [[AND7:%[0-9]+]]:_(s16) = G_AND [[COPY7]], [[C]]
+    ; GFX8: [[SHL:%[0-9]+]]:_(s16) = G_SHL [[AND7]], [[C1]](s16)
+    ; GFX8: [[OR:%[0-9]+]]:_(s16) = G_OR [[AND6]], [[SHL]]
+    ; GFX8: [[COPY8:%[0-9]+]]:_(s16) = COPY [[LSHR2]](s16)
+    ; GFX8: [[AND8:%[0-9]+]]:_(s16) = G_AND [[COPY8]], [[C]]
+    ; GFX8: [[TRUNC6:%[0-9]+]]:_(s16) = G_TRUNC [[DEF]](s32)
+    ; GFX8: [[AND9:%[0-9]+]]:_(s16) = G_AND [[TRUNC6]], [[C]]
+    ; GFX8: [[SHL1:%[0-9]+]]:_(s16) = G_SHL [[AND9]], [[C1]](s16)
+    ; GFX8: [[OR1:%[0-9]+]]:_(s16) = G_OR [[AND8]], [[SHL1]]
+    ; GFX8: [[ZEXT:%[0-9]+]]:_(s32) = G_ZEXT [[OR]](s16)
+    ; GFX8: [[ZEXT1:%[0-9]+]]:_(s32) = G_ZEXT [[OR1]](s16)
+    ; GFX8: [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX8: [[SHL2:%[0-9]+]]:_(s32) = G_SHL [[ZEXT1]], [[C2]](s32)
+    ; GFX8: [[OR2:%[0-9]+]]:_(s32) = G_OR [[ZEXT]], [[SHL2]]
+    ; GFX8: [[COPY9:%[0-9]+]]:_(s32) = COPY [[OR2]](s32)
+    ; GFX8: $vgpr0 = COPY [[COPY9]](s32)
+    ; GFX9-LABEL: name: test_umulh_v3s8
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9: [[COPY2:%[0-9]+]]:_(s32) = COPY $vgpr2
+    ; GFX9: [[COPY3:%[0-9]+]]:_(s32) = COPY $vgpr3
+    ; GFX9: [[COPY4:%[0-9]+]]:_(s32) = COPY $vgpr4
+    ; GFX9: [[COPY5:%[0-9]+]]:_(s32) = COPY $vgpr5
+    ; GFX9: [[DEF:%[0-9]+]]:_(s32) = G_IMPLICIT_DEF
+    ; GFX9: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX9: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+    ; GFX9: [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[COPY2]](s32)
+    ; GFX9: [[TRUNC3:%[0-9]+]]:_(s16) = G_TRUNC [[DEF]](s32)
+    ; GFX9: [[DEF1:%[0-9]+]]:_(<2 x s32>) = G_IMPLICIT_DEF
+    ; GFX9: [[TRUNC4:%[0-9]+]]:_(<2 x s8>) = G_TRUNC [[DEF1]](<2 x s32>)
+    ; GFX9: [[TRUNC5:%[0-9]+]]:_(s16) = G_TRUNC [[COPY3]](s32)
+    ; GFX9: [[TRUNC6:%[0-9]+]]:_(s16) = G_TRUNC [[COPY4]](s32)
+    ; GFX9: [[TRUNC7:%[0-9]+]]:_(s16) = G_TRUNC [[COPY5]](s32)
+    ; GFX9: [[TRUNC8:%[0-9]+]]:_(s16) = G_TRUNC [[DEF]](s32)
+    ; GFX9: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 255
+    ; GFX9: [[COPY6:%[0-9]+]]:_(s16) = COPY [[TRUNC]](s16)
+    ; GFX9: [[AND:%[0-9]+]]:_(s16) = G_AND [[COPY6]], [[C]]
+    ; GFX9: [[COPY7:%[0-9]+]]:_(s16) = COPY [[TRUNC1]](s16)
+    ; GFX9: [[AND1:%[0-9]+]]:_(s16) = G_AND [[COPY7]], [[C]]
+    ; GFX9: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[AND]](s16)
+    ; GFX9: [[ANYEXT1:%[0-9]+]]:_(s32) = G_ANYEXT [[AND1]](s16)
+    ; GFX9: [[BUILD_VECTOR_TRUNC:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[ANYEXT]](s32), [[ANYEXT1]](s32)
+    ; GFX9: [[COPY8:%[0-9]+]]:_(s16) = COPY [[TRUNC5]](s16)
+    ; GFX9: [[AND2:%[0-9]+]]:_(s16) = G_AND [[COPY8]], [[C]]
+    ; GFX9: [[COPY9:%[0-9]+]]:_(s16) = COPY [[TRUNC6]](s16)
+    ; GFX9: [[AND3:%[0-9]+]]:_(s16) = G_AND [[COPY9]], [[C]]
+    ; GFX9: [[ANYEXT2:%[0-9]+]]:_(s32) = G_ANYEXT [[AND2]](s16)
+    ; GFX9: [[ANYEXT3:%[0-9]+]]:_(s32) = G_ANYEXT [[AND3]](s16)
+    ; GFX9: [[BUILD_VECTOR_TRUNC1:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[ANYEXT2]](s32), [[ANYEXT3]](s32)
+    ; GFX9: [[MUL:%[0-9]+]]:_(<2 x s16>) = G_MUL [[BUILD_VECTOR_TRUNC]], [[BUILD_VECTOR_TRUNC1]]
+    ; GFX9: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 8
+    ; GFX9: [[COPY10:%[0-9]+]]:_(s32) = COPY [[C1]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC2:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY10]](s32), [[C1]](s32)
+    ; GFX9: [[LSHR:%[0-9]+]]:_(<2 x s16>) = G_LSHR [[MUL]], [[BUILD_VECTOR_TRUNC2]](<2 x s16>)
+    ; GFX9: [[TRUNC9:%[0-9]+]]:_(<2 x s8>) = G_TRUNC [[LSHR]](<2 x s16>)
+    ; GFX9: [[COPY11:%[0-9]+]]:_(s16) = COPY [[TRUNC2]](s16)
+    ; GFX9: [[AND4:%[0-9]+]]:_(s16) = G_AND [[COPY11]], [[C]]
+    ; GFX9: [[COPY12:%[0-9]+]]:_(s16) = COPY [[TRUNC3]](s16)
+    ; GFX9: [[AND5:%[0-9]+]]:_(s16) = G_AND [[COPY12]], [[C]]
+    ; GFX9: [[ANYEXT4:%[0-9]+]]:_(s32) = G_ANYEXT [[AND4]](s16)
+    ; GFX9: [[ANYEXT5:%[0-9]+]]:_(s32) = G_ANYEXT [[AND5]](s16)
+    ; GFX9: [[BUILD_VECTOR_TRUNC3:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[ANYEXT4]](s32), [[ANYEXT5]](s32)
+    ; GFX9: [[COPY13:%[0-9]+]]:_(s16) = COPY [[TRUNC7]](s16)
+    ; GFX9: [[AND6:%[0-9]+]]:_(s16) = G_AND [[COPY13]], [[C]]
+    ; GFX9: [[COPY14:%[0-9]+]]:_(s16) = COPY [[TRUNC8]](s16)
+    ; GFX9: [[AND7:%[0-9]+]]:_(s16) = G_AND [[COPY14]], [[C]]
+    ; GFX9: [[ANYEXT6:%[0-9]+]]:_(s32) = G_ANYEXT [[AND6]](s16)
+    ; GFX9: [[ANYEXT7:%[0-9]+]]:_(s32) = G_ANYEXT [[AND7]](s16)
+    ; GFX9: [[BUILD_VECTOR_TRUNC4:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[ANYEXT6]](s32), [[ANYEXT7]](s32)
+    ; GFX9: [[MUL1:%[0-9]+]]:_(<2 x s16>) = G_MUL [[BUILD_VECTOR_TRUNC3]], [[BUILD_VECTOR_TRUNC4]]
+    ; GFX9: [[COPY15:%[0-9]+]]:_(s32) = COPY [[C1]](s32)
+    ; GFX9: [[COPY16:%[0-9]+]]:_(s32) = COPY [[C1]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC5:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY15]](s32), [[COPY16]](s32)
+    ; GFX9: [[LSHR1:%[0-9]+]]:_(<2 x s16>) = G_LSHR [[MUL1]], [[BUILD_VECTOR_TRUNC5]](<2 x s16>)
+    ; GFX9: [[TRUNC10:%[0-9]+]]:_(<2 x s8>) = G_TRUNC [[LSHR1]](<2 x s16>)
+    ; GFX9: [[CONCAT_VECTORS:%[0-9]+]]:_(<6 x s8>) = G_CONCAT_VECTORS [[TRUNC9]](<2 x s8>), [[TRUNC10]](<2 x s8>), [[TRUNC4]](<2 x s8>)
+    ; GFX9: [[EXTRACT:%[0-9]+]]:_(<3 x s8>) = G_EXTRACT [[CONCAT_VECTORS]](<6 x s8>), 0
+    ; GFX9: [[UV:%[0-9]+]]:_(s8), [[UV1:%[0-9]+]]:_(s8), [[UV2:%[0-9]+]]:_(s8) = G_UNMERGE_VALUES [[EXTRACT]](<3 x s8>)
+    ; GFX9: [[DEF2:%[0-9]+]]:_(s32) = G_IMPLICIT_DEF
+    ; GFX9: [[ZEXT:%[0-9]+]]:_(s16) = G_ZEXT [[UV]](s8)
+    ; GFX9: [[ZEXT1:%[0-9]+]]:_(s16) = G_ZEXT [[UV1]](s8)
+    ; GFX9: [[C2:%[0-9]+]]:_(s16) = G_CONSTANT i16 8
+    ; GFX9: [[SHL:%[0-9]+]]:_(s16) = G_SHL [[ZEXT1]], [[C2]](s16)
+    ; GFX9: [[OR:%[0-9]+]]:_(s16) = G_OR [[ZEXT]], [[SHL]]
+    ; GFX9: [[ZEXT2:%[0-9]+]]:_(s16) = G_ZEXT [[UV2]](s8)
+    ; GFX9: [[TRUNC11:%[0-9]+]]:_(s16) = G_TRUNC [[DEF2]](s32)
+    ; GFX9: [[AND8:%[0-9]+]]:_(s16) = G_AND [[TRUNC11]], [[C]]
+    ; GFX9: [[SHL1:%[0-9]+]]:_(s16) = G_SHL [[AND8]], [[C2]](s16)
+    ; GFX9: [[OR1:%[0-9]+]]:_(s16) = G_OR [[ZEXT2]], [[SHL1]]
+    ; GFX9: [[ZEXT3:%[0-9]+]]:_(s32) = G_ZEXT [[OR]](s16)
+    ; GFX9: [[ZEXT4:%[0-9]+]]:_(s32) = G_ZEXT [[OR1]](s16)
+    ; GFX9: [[C3:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX9: [[SHL2:%[0-9]+]]:_(s32) = G_SHL [[ZEXT4]], [[C3]](s32)
+    ; GFX9: [[OR2:%[0-9]+]]:_(s32) = G_OR [[ZEXT3]], [[SHL2]]
+    ; GFX9: [[COPY17:%[0-9]+]]:_(s32) = COPY [[OR2]](s32)
+    ; GFX9: $vgpr0 = COPY [[COPY17]](s32)
+    %0:_(s32) = COPY $vgpr0
+    %1:_(s32) = COPY $vgpr1
+    %2:_(s32) = COPY $vgpr2
+    %3:_(s32) = COPY $vgpr3
+    %4:_(s32) = COPY $vgpr4
+    %20:_(s32) = COPY $vgpr5
+    %5:_(s8) = G_TRUNC %0
+    %6:_(s8) = G_TRUNC %1
+    %7:_(s8) = G_TRUNC %2
+    %8:_(s8) = G_TRUNC %3
+    %9:_(s8) = G_TRUNC %4
+    %10:_(s8) = G_TRUNC %20
+    %11:_(<3 x s8>) = G_BUILD_VECTOR %5, %6, %7
+    %12:_(<3 x s8>) = G_BUILD_VECTOR %8, %9, %10
+    %13:_(<3 x s8>) = G_UMULH %11, %12
+    %14:_(s8), %15:_(s8), %16:_(s8) = G_UNMERGE_VALUES %13
+    %17:_(s24) = G_MERGE_VALUES %14, %15, %16
+    %18:_(s32) = G_ANYEXT %17
+    $vgpr0 = COPY %18
+...
+
+---
+name: test_umulh_v2s8
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1, $vgpr2, $vgpr3
+    ; GFX8-LABEL: name: test_umulh_v2s8
+    ; GFX8: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX8: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX8: [[COPY2:%[0-9]+]]:_(s32) = COPY $vgpr2
+    ; GFX8: [[COPY3:%[0-9]+]]:_(s32) = COPY $vgpr3
+    ; GFX8: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 255
+    ; GFX8: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX8: [[AND:%[0-9]+]]:_(s16) = G_AND [[TRUNC]], [[C]]
+    ; GFX8: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY2]](s32)
+    ; GFX8: [[AND1:%[0-9]+]]:_(s16) = G_AND [[TRUNC1]], [[C]]
+    ; GFX8: [[MUL:%[0-9]+]]:_(s16) = G_MUL [[AND]], [[AND1]]
+    ; GFX8: [[C1:%[0-9]+]]:_(s16) = G_CONSTANT i16 8
+    ; GFX8: [[LSHR:%[0-9]+]]:_(s16) = G_LSHR [[MUL]], [[C1]](s16)
+    ; GFX8: [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+    ; GFX8: [[AND2:%[0-9]+]]:_(s16) = G_AND [[TRUNC2]], [[C]]
+    ; GFX8: [[TRUNC3:%[0-9]+]]:_(s16) = G_TRUNC [[COPY3]](s32)
+    ; GFX8: [[AND3:%[0-9]+]]:_(s16) = G_AND [[TRUNC3]], [[C]]
+    ; GFX8: [[MUL1:%[0-9]+]]:_(s16) = G_MUL [[AND2]], [[AND3]]
+    ; GFX8: [[LSHR1:%[0-9]+]]:_(s16) = G_LSHR [[MUL1]], [[C1]](s16)
+    ; GFX8: [[COPY4:%[0-9]+]]:_(s16) = COPY [[LSHR]](s16)
+    ; GFX8: [[AND4:%[0-9]+]]:_(s16) = G_AND [[COPY4]], [[C]]
+    ; GFX8: [[COPY5:%[0-9]+]]:_(s16) = COPY [[LSHR1]](s16)
+    ; GFX8: [[AND5:%[0-9]+]]:_(s16) = G_AND [[COPY5]], [[C]]
+    ; GFX8: [[SHL:%[0-9]+]]:_(s16) = G_SHL [[AND5]], [[C1]](s16)
+    ; GFX8: [[OR:%[0-9]+]]:_(s16) = G_OR [[AND4]], [[SHL]]
+    ; GFX8: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[OR]](s16)
+    ; GFX8: $vgpr0 = COPY [[ANYEXT]](s32)
+    ; GFX9-LABEL: name: test_umulh_v2s8
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9: [[COPY2:%[0-9]+]]:_(s32) = COPY $vgpr2
+    ; GFX9: [[COPY3:%[0-9]+]]:_(s32) = COPY $vgpr3
+    ; GFX9: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX9: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+    ; GFX9: [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[COPY2]](s32)
+    ; GFX9: [[TRUNC3:%[0-9]+]]:_(s16) = G_TRUNC [[COPY3]](s32)
+    ; GFX9: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 255
+    ; GFX9: [[COPY4:%[0-9]+]]:_(s16) = COPY [[TRUNC]](s16)
+    ; GFX9: [[AND:%[0-9]+]]:_(s16) = G_AND [[COPY4]], [[C]]
+    ; GFX9: [[COPY5:%[0-9]+]]:_(s16) = COPY [[TRUNC1]](s16)
+    ; GFX9: [[AND1:%[0-9]+]]:_(s16) = G_AND [[COPY5]], [[C]]
+    ; GFX9: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[AND]](s16)
+    ; GFX9: [[ANYEXT1:%[0-9]+]]:_(s32) = G_ANYEXT [[AND1]](s16)
+    ; GFX9: [[BUILD_VECTOR_TRUNC:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[ANYEXT]](s32), [[ANYEXT1]](s32)
+    ; GFX9: [[COPY6:%[0-9]+]]:_(s16) = COPY [[TRUNC2]](s16)
+    ; GFX9: [[AND2:%[0-9]+]]:_(s16) = G_AND [[COPY6]], [[C]]
+    ; GFX9: [[COPY7:%[0-9]+]]:_(s16) = COPY [[TRUNC3]](s16)
+    ; GFX9: [[AND3:%[0-9]+]]:_(s16) = G_AND [[COPY7]], [[C]]
+    ; GFX9: [[ANYEXT2:%[0-9]+]]:_(s32) = G_ANYEXT [[AND2]](s16)
+    ; GFX9: [[ANYEXT3:%[0-9]+]]:_(s32) = G_ANYEXT [[AND3]](s16)
+    ; GFX9: [[BUILD_VECTOR_TRUNC1:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[ANYEXT2]](s32), [[ANYEXT3]](s32)
+    ; GFX9: [[MUL:%[0-9]+]]:_(<2 x s16>) = G_MUL [[BUILD_VECTOR_TRUNC]], [[BUILD_VECTOR_TRUNC1]]
+    ; GFX9: [[C1:%[0-9]+]]:_(s16) = G_CONSTANT i16 8
+    ; GFX9: [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 8
+    ; GFX9: [[COPY8:%[0-9]+]]:_(s32) = COPY [[C2]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC2:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY8]](s32), [[C2]](s32)
+    ; GFX9: [[LSHR:%[0-9]+]]:_(<2 x s16>) = G_LSHR [[MUL]], [[BUILD_VECTOR_TRUNC2]](<2 x s16>)
+    ; GFX9: [[BITCAST:%[0-9]+]]:_(s32) = G_BITCAST [[LSHR]](<2 x s16>)
+    ; GFX9: [[TRUNC4:%[0-9]+]]:_(s16) = G_TRUNC [[BITCAST]](s32)
+    ; GFX9: [[C3:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX9: [[LSHR1:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST]], [[C3]](s32)
+    ; GFX9: [[TRUNC5:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR1]](s32)
+    ; GFX9: [[COPY9:%[0-9]+]]:_(s16) = COPY [[TRUNC4]](s16)
+    ; GFX9: [[AND4:%[0-9]+]]:_(s16) = G_AND [[COPY9]], [[C]]
+    ; GFX9: [[COPY10:%[0-9]+]]:_(s16) = COPY [[TRUNC5]](s16)
+    ; GFX9: [[AND5:%[0-9]+]]:_(s16) = G_AND [[COPY10]], [[C]]
+    ; GFX9: [[SHL:%[0-9]+]]:_(s16) = G_SHL [[AND5]], [[C1]](s16)
+    ; GFX9: [[OR:%[0-9]+]]:_(s16) = G_OR [[AND4]], [[SHL]]
+    ; GFX9: [[ANYEXT4:%[0-9]+]]:_(s32) = G_ANYEXT [[OR]](s16)
+    ; GFX9: $vgpr0 = COPY [[ANYEXT4]](s32)
+    %0:_(s32) = COPY $vgpr0
+    %1:_(s32) = COPY $vgpr1
+    %2:_(s32) = COPY $vgpr2
+    %3:_(s32) = COPY $vgpr3
+    %5:_(s8) = G_TRUNC %0
+    %6:_(s8) = G_TRUNC %1
+    %7:_(s8) = G_TRUNC %2
+    %8:_(s8) = G_TRUNC %3
+    %11:_(<2 x s8>) = G_BUILD_VECTOR %5, %6
+    %12:_(<2 x s8>) = G_BUILD_VECTOR %7, %8
+    %13:_(<2 x s8>) = G_UMULH %11, %12
+    %14:_(s8), %15:_(s8) = G_UNMERGE_VALUES %13
+    %17:_(s16) = G_MERGE_VALUES %14, %15
+    %18:_(s32) = G_ANYEXT %17
+    $vgpr0 = COPY %18
+...
+
+---
+name: test_umulh_v4s8
+body: |
+  bb.0:
+    liveins: $vgpr0, $vgpr1
+    ; GFX8-LABEL: name: test_umulh_v4s8
+    ; GFX8: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX8: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX8: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 8
+    ; GFX8: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[COPY]], [[C]](s32)
+    ; GFX8: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX8: [[LSHR1:%[0-9]+]]:_(s32) = G_LSHR [[COPY]], [[C1]](s32)
+    ; GFX8: [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 24
+    ; GFX8: [[LSHR2:%[0-9]+]]:_(s32) = G_LSHR [[COPY]], [[C2]](s32)
+    ; GFX8: [[LSHR3:%[0-9]+]]:_(s32) = G_LSHR [[COPY1]], [[C]](s32)
+    ; GFX8: [[LSHR4:%[0-9]+]]:_(s32) = G_LSHR [[COPY1]], [[C1]](s32)
+    ; GFX8: [[LSHR5:%[0-9]+]]:_(s32) = G_LSHR [[COPY1]], [[C2]](s32)
+    ; GFX8: [[C3:%[0-9]+]]:_(s16) = G_CONSTANT i16 255
+    ; GFX8: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX8: [[AND:%[0-9]+]]:_(s16) = G_AND [[TRUNC]], [[C3]]
+    ; GFX8: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+    ; GFX8: [[AND1:%[0-9]+]]:_(s16) = G_AND [[TRUNC1]], [[C3]]
+    ; GFX8: [[MUL:%[0-9]+]]:_(s16) = G_MUL [[AND]], [[AND1]]
+    ; GFX8: [[C4:%[0-9]+]]:_(s16) = G_CONSTANT i16 8
+    ; GFX8: [[LSHR6:%[0-9]+]]:_(s16) = G_LSHR [[MUL]], [[C4]](s16)
+    ; GFX8: [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR]](s32)
+    ; GFX8: [[AND2:%[0-9]+]]:_(s16) = G_AND [[TRUNC2]], [[C3]]
+    ; GFX8: [[TRUNC3:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR3]](s32)
+    ; GFX8: [[AND3:%[0-9]+]]:_(s16) = G_AND [[TRUNC3]], [[C3]]
+    ; GFX8: [[MUL1:%[0-9]+]]:_(s16) = G_MUL [[AND2]], [[AND3]]
+    ; GFX8: [[LSHR7:%[0-9]+]]:_(s16) = G_LSHR [[MUL1]], [[C4]](s16)
+    ; GFX8: [[TRUNC4:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR1]](s32)
+    ; GFX8: [[AND4:%[0-9]+]]:_(s16) = G_AND [[TRUNC4]], [[C3]]
+    ; GFX8: [[TRUNC5:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR4]](s32)
+    ; GFX8: [[AND5:%[0-9]+]]:_(s16) = G_AND [[TRUNC5]], [[C3]]
+    ; GFX8: [[MUL2:%[0-9]+]]:_(s16) = G_MUL [[AND4]], [[AND5]]
+    ; GFX8: [[LSHR8:%[0-9]+]]:_(s16) = G_LSHR [[MUL2]], [[C4]](s16)
+    ; GFX8: [[TRUNC6:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR2]](s32)
+    ; GFX8: [[AND6:%[0-9]+]]:_(s16) = G_AND [[TRUNC6]], [[C3]]
+    ; GFX8: [[TRUNC7:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR5]](s32)
+    ; GFX8: [[AND7:%[0-9]+]]:_(s16) = G_AND [[TRUNC7]], [[C3]]
+    ; GFX8: [[MUL3:%[0-9]+]]:_(s16) = G_MUL [[AND6]], [[AND7]]
+    ; GFX8: [[LSHR9:%[0-9]+]]:_(s16) = G_LSHR [[MUL3]], [[C4]](s16)
+    ; GFX8: [[C5:%[0-9]+]]:_(s32) = G_CONSTANT i32 255
+    ; GFX8: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[LSHR6]](s16)
+    ; GFX8: [[AND8:%[0-9]+]]:_(s32) = G_AND [[ANYEXT]], [[C5]]
+    ; GFX8: [[ANYEXT1:%[0-9]+]]:_(s32) = G_ANYEXT [[LSHR7]](s16)
+    ; GFX8: [[AND9:%[0-9]+]]:_(s32) = G_AND [[ANYEXT1]], [[C5]]
+    ; GFX8: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[AND9]], [[C]](s32)
+    ; GFX8: [[OR:%[0-9]+]]:_(s32) = G_OR [[AND8]], [[SHL]]
+    ; GFX8: [[ANYEXT2:%[0-9]+]]:_(s32) = G_ANYEXT [[LSHR8]](s16)
+    ; GFX8: [[AND10:%[0-9]+]]:_(s32) = G_AND [[ANYEXT2]], [[C5]]
+    ; GFX8: [[SHL1:%[0-9]+]]:_(s32) = G_SHL [[AND10]], [[C1]](s32)
+    ; GFX8: [[OR1:%[0-9]+]]:_(s32) = G_OR [[OR]], [[SHL1]]
+    ; GFX8: [[ANYEXT3:%[0-9]+]]:_(s32) = G_ANYEXT [[LSHR9]](s16)
+    ; GFX8: [[AND11:%[0-9]+]]:_(s32) = G_AND [[ANYEXT3]], [[C5]]
+    ; GFX8: [[SHL2:%[0-9]+]]:_(s32) = G_SHL [[AND11]], [[C2]](s32)
+    ; GFX8: [[OR2:%[0-9]+]]:_(s32) = G_OR [[OR1]], [[SHL2]]
+    ; GFX8: $vgpr0 = COPY [[OR2]](s32)
+    ; GFX9-LABEL: name: test_umulh_v4s8
+    ; GFX9: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
+    ; GFX9: [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
+    ; GFX9: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 8
+    ; GFX9: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[COPY]], [[C]](s32)
+    ; GFX9: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; GFX9: [[LSHR1:%[0-9]+]]:_(s32) = G_LSHR [[COPY]], [[C1]](s32)
+    ; GFX9: [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 24
+    ; GFX9: [[LSHR2:%[0-9]+]]:_(s32) = G_LSHR [[COPY]], [[C2]](s32)
+    ; GFX9: [[LSHR3:%[0-9]+]]:_(s32) = G_LSHR [[COPY1]], [[C]](s32)
+    ; GFX9: [[LSHR4:%[0-9]+]]:_(s32) = G_LSHR [[COPY1]], [[C1]](s32)
+    ; GFX9: [[LSHR5:%[0-9]+]]:_(s32) = G_LSHR [[COPY1]], [[C2]](s32)
+    ; GFX9: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
+    ; GFX9: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR]](s32)
+    ; GFX9: [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR1]](s32)
+    ; GFX9: [[TRUNC3:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR2]](s32)
+    ; GFX9: [[TRUNC4:%[0-9]+]]:_(s16) = G_TRUNC [[COPY1]](s32)
+    ; GFX9: [[TRUNC5:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR3]](s32)
+    ; GFX9: [[TRUNC6:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR4]](s32)
+    ; GFX9: [[TRUNC7:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR5]](s32)
+    ; GFX9: [[C3:%[0-9]+]]:_(s16) = G_CONSTANT i16 255
+    ; GFX9: [[COPY2:%[0-9]+]]:_(s16) = COPY [[TRUNC]](s16)
+    ; GFX9: [[AND:%[0-9]+]]:_(s16) = G_AND [[COPY2]], [[C3]]
+    ; GFX9: [[COPY3:%[0-9]+]]:_(s16) = COPY [[TRUNC1]](s16)
+    ; GFX9: [[AND1:%[0-9]+]]:_(s16) = G_AND [[COPY3]], [[C3]]
+    ; GFX9: [[ANYEXT:%[0-9]+]]:_(s32) = G_ANYEXT [[AND]](s16)
+    ; GFX9: [[ANYEXT1:%[0-9]+]]:_(s32) = G_ANYEXT [[AND1]](s16)
+    ; GFX9: [[BUILD_VECTOR_TRUNC:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[ANYEXT]](s32), [[ANYEXT1]](s32)
+    ; GFX9: [[COPY4:%[0-9]+]]:_(s16) = COPY [[TRUNC4]](s16)
+    ; GFX9: [[AND2:%[0-9]+]]:_(s16) = G_AND [[COPY4]], [[C3]]
+    ; GFX9: [[COPY5:%[0-9]+]]:_(s16) = COPY [[TRUNC5]](s16)
+    ; GFX9: [[AND3:%[0-9]+]]:_(s16) = G_AND [[COPY5]], [[C3]]
+    ; GFX9: [[ANYEXT2:%[0-9]+]]:_(s32) = G_ANYEXT [[AND2]](s16)
+    ; GFX9: [[ANYEXT3:%[0-9]+]]:_(s32) = G_ANYEXT [[AND3]](s16)
+    ; GFX9: [[BUILD_VECTOR_TRUNC1:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[ANYEXT2]](s32), [[ANYEXT3]](s32)
+    ; GFX9: [[MUL:%[0-9]+]]:_(<2 x s16>) = G_MUL [[BUILD_VECTOR_TRUNC]], [[BUILD_VECTOR_TRUNC1]]
+    ; GFX9: [[COPY6:%[0-9]+]]:_(s32) = COPY [[C]](s32)
+    ; GFX9: [[COPY7:%[0-9]+]]:_(s32) = COPY [[C]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC2:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY6]](s32), [[COPY7]](s32)
+    ; GFX9: [[LSHR6:%[0-9]+]]:_(<2 x s16>) = G_LSHR [[MUL]], [[BUILD_VECTOR_TRUNC2]](<2 x s16>)
+    ; GFX9: [[COPY8:%[0-9]+]]:_(s16) = COPY [[TRUNC2]](s16)
+    ; GFX9: [[AND4:%[0-9]+]]:_(s16) = G_AND [[COPY8]], [[C3]]
+    ; GFX9: [[COPY9:%[0-9]+]]:_(s16) = COPY [[TRUNC3]](s16)
+    ; GFX9: [[AND5:%[0-9]+]]:_(s16) = G_AND [[COPY9]], [[C3]]
+    ; GFX9: [[ANYEXT4:%[0-9]+]]:_(s32) = G_ANYEXT [[AND4]](s16)
+    ; GFX9: [[ANYEXT5:%[0-9]+]]:_(s32) = G_ANYEXT [[AND5]](s16)
+    ; GFX9: [[BUILD_VECTOR_TRUNC3:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[ANYEXT4]](s32), [[ANYEXT5]](s32)
+    ; GFX9: [[COPY10:%[0-9]+]]:_(s16) = COPY [[TRUNC6]](s16)
+    ; GFX9: [[AND6:%[0-9]+]]:_(s16) = G_AND [[COPY10]], [[C3]]
+    ; GFX9: [[COPY11:%[0-9]+]]:_(s16) = COPY [[TRUNC7]](s16)
+    ; GFX9: [[AND7:%[0-9]+]]:_(s16) = G_AND [[COPY11]], [[C3]]
+    ; GFX9: [[ANYEXT6:%[0-9]+]]:_(s32) = G_ANYEXT [[AND6]](s16)
+    ; GFX9: [[ANYEXT7:%[0-9]+]]:_(s32) = G_ANYEXT [[AND7]](s16)
+    ; GFX9: [[BUILD_VECTOR_TRUNC4:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[ANYEXT6]](s32), [[ANYEXT7]](s32)
+    ; GFX9: [[MUL1:%[0-9]+]]:_(<2 x s16>) = G_MUL [[BUILD_VECTOR_TRUNC3]], [[BUILD_VECTOR_TRUNC4]]
+    ; GFX9: [[COPY12:%[0-9]+]]:_(s32) = COPY [[C]](s32)
+    ; GFX9: [[COPY13:%[0-9]+]]:_(s32) = COPY [[C]](s32)
+    ; GFX9: [[BUILD_VECTOR_TRUNC5:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR_TRUNC [[COPY12]](s32), [[COPY13]](s32)
+    ; GFX9: [[LSHR7:%[0-9]+]]:_(<2 x s16>) = G_LSHR [[MUL1]], [[BUILD_VECTOR_TRUNC5]](<2 x s16>)
+    ; GFX9: [[BITCAST:%[0-9]+]]:_(s32) = G_BITCAST [[LSHR6]](<2 x s16>)
+    ; GFX9: [[LSHR8:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST]], [[C1]](s32)
+    ; GFX9: [[BITCAST1:%[0-9]+]]:_(s32) = G_BITCAST [[LSHR7]](<2 x s16>)
+    ; GFX9: [[LSHR9:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST1]], [[C1]](s32)
+    ; GFX9: [[C4:%[0-9]+]]:_(s32) = G_CONSTANT i32 255
+    ; GFX9: [[COPY14:%[0-9]+]]:_(s32) = COPY [[BITCAST]](s32)
+    ; GFX9: [[AND8:%[0-9]+]]:_(s32) = G_AND [[COPY14]], [[C4]]
+    ; GFX9: [[COPY15:%[0-9]+]]:_(s32) = COPY [[LSHR8]](s32)
+    ; GFX9: [[AND9:%[0-9]+]]:_(s32) = G_AND [[COPY15]], [[C4]]
+    ; GFX9: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[AND9]], [[C]](s32)
+    ; GFX9: [[OR:%[0-9]+]]:_(s32) = G_OR [[AND8]], [[SHL]]
+    ; GFX9: [[COPY16:%[0-9]+]]:_(s32) = COPY [[BITCAST1]](s32)
+    ; GFX9: [[AND10:%[0-9]+]]:_(s32) = G_AND [[COPY16]], [[C4]]
+    ; GFX9: [[SHL1:%[0-9]+]]:_(s32) = G_SHL [[AND10]], [[C1]](s32)
+    ; GFX9: [[OR1:%[0-9]+]]:_(s32) = G_OR [[OR]], [[SHL1]]
+    ; GFX9: [[COPY17:%[0-9]+]]:_(s32) = COPY [[LSHR9]](s32)
+    ; GFX9: [[AND11:%[0-9]+]]:_(s32) = G_AND [[COPY17]], [[C4]]
+    ; GFX9: [[SHL2:%[0-9]+]]:_(s32) = G_SHL [[AND11]], [[C2]](s32)
+    ; GFX9: [[OR2:%[0-9]+]]:_(s32) = G_OR [[OR1]], [[SHL2]]
+    ; GFX9: $vgpr0 = COPY [[OR2]](s32)
+    %0:_(s32) = COPY $vgpr0
+    %1:_(s32) = COPY $vgpr1
+    %2:_(s8), %3:_(s8), %4:_(s8), %5:_(s8) = G_UNMERGE_VALUES %0
+    %6:_(s8), %7:_(s8), %8:_(s8), %9:_(s8) = G_UNMERGE_VALUES %1
+    %10:_(<4 x s8>) = G_BUILD_VECTOR %2:_(s8), %3:_(s8), %4:_(s8), %5:_(s8)
+    %11:_(<4 x s8>) = G_BUILD_VECTOR %6:_(s8), %7:_(s8), %8:_(s8), %9:_(s8)
+    %12:_(<4 x s8>) = G_UMULH %10:_, %11:_
+    %13:_(s8), %14:_(s8), %15:_(s8), %16:_(s8) = G_UNMERGE_VALUES %12:_(<4 x s8>)
+    %17:_(s32) = G_MERGE_VALUES %13, %14, %15, %16
+    $vgpr0 = COPY %17
+...