Index: llvm/trunk/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
===================================================================
--- llvm/trunk/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ llvm/trunk/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -1208,13 +1208,6 @@
     return Legalized;
 
   case TargetOpcode::G_LOAD:
-    // For some types like i24, we might try to widen to i32. To properly handle
-    // this we should be using a dedicated extending load, until then avoid
-    // trying to legalize.
-    if (alignTo(MRI.getType(MI.getOperand(0).getReg()).getSizeInBits(), 8) !=
-        WideTy.getSizeInBits())
-      return UnableToLegalize;
-    LLVM_FALLTHROUGH;
   case TargetOpcode::G_SEXTLOAD:
   case TargetOpcode::G_ZEXTLOAD:
     Observer.changingInstr(MI);
Index: llvm/trunk/lib/Target/Mips/MipsInstructionSelector.cpp
===================================================================
--- llvm/trunk/lib/Target/Mips/MipsInstructionSelector.cpp
+++ llvm/trunk/lib/Target/Mips/MipsInstructionSelector.cpp
@@ -96,10 +96,15 @@
     switch (MemSizeInBytes) {
     case 4:
       return Mips::SW;
+    case 2:
+      return Mips::SH;
+    case 1:
+      return Mips::SB;
     default:
       return Opc;
     }
   else
+    // Unspecified extending load is selected into zeroExtending load.
     switch (MemSizeInBytes) {
     case 4:
       return Mips::LW;
Index: llvm/trunk/lib/Target/Mips/MipsLegalizerInfo.cpp
===================================================================
--- llvm/trunk/lib/Target/Mips/MipsLegalizerInfo.cpp
+++ llvm/trunk/lib/Target/Mips/MipsLegalizerInfo.cpp
@@ -36,7 +36,11 @@
       .lowerFor({{s32, s1}});
 
   getActionDefinitionsBuilder({G_LOAD, G_STORE})
-      .legalForCartesianProduct({p0, s32}, {p0});
+      .legalForTypesWithMemSize({{s32, p0, 8},
+                                 {s32, p0, 16},
+                                 {s32, p0, 32},
+                                 {p0, p0, 32}})
+      .minScalar(0, s32);
 
   getActionDefinitionsBuilder({G_ZEXTLOAD, G_SEXTLOAD})
       .legalForTypesWithMemSize({{s32, p0, 8},
Index: llvm/trunk/test/CodeGen/AMDGPU/GlobalISel/legalize-sextload-flat.mir
===================================================================
--- llvm/trunk/test/CodeGen/AMDGPU/GlobalISel/legalize-sextload-flat.mir
+++ llvm/trunk/test/CodeGen/AMDGPU/GlobalISel/legalize-sextload-flat.mir
@@ -1,19 +1,24 @@
 # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
-# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=fiji -run-pass=legalizer -o - %s | FileCheck %s
-# RUN: not llc -mtriple=amdgcn-mesa-mesa3d -mcpu=tahiti -run-pass=legalizer -o /dev/null %s 2>&1 | FileCheck -check-prefix=ERROR %s
-
-# ERROR: LLVM ERROR: unable to legalize instruction: %2:_(s8) = G_LOAD %0:_(p0) :: (load 1) (in function: test_sextload_flat_i32_i8)
-
+# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=fiji -run-pass=legalizer -o - %s | FileCheck %s -check-prefixes=GCN,SI
+# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=tahiti -run-pass=legalizer -o - %s | FileCheck %s -check-prefixes=GCN,VI
 ---
 name: test_sextload_flat_i32_i8
 body: |
   bb.0:
     liveins: $vgpr0_vgpr1
 
-    ; CHECK-LABEL: name: test_sextload_flat_i32_i8
-    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
-    ; CHECK: [[SEXTLOAD:%[0-9]+]]:_(s32) = G_SEXTLOAD [[COPY]](p0) :: (load 1)
-    ; CHECK: $vgpr0 = COPY [[SEXTLOAD]](s32)
+    ; SI-LABEL: name: test_sextload_flat_i32_i8
+    ; SI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; SI: [[SEXTLOAD:%[0-9]+]]:_(s32) = G_SEXTLOAD [[COPY]](p0) :: (load 1)
+    ; SI: $vgpr0 = COPY [[SEXTLOAD]](s32)
+    ; VI-LABEL: name: test_sextload_flat_i32_i8
+    ; VI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; VI: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 1)
+    ; VI: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 24
+    ; VI: [[COPY1:%[0-9]+]]:_(s32) = COPY [[LOAD]](s32)
+    ; VI: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[COPY1]], [[C]](s32)
+    ; VI: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[SHL]], [[C]](s32)
+    ; VI: $vgpr0 = COPY [[ASHR]](s32)
     %0:_(p0) = COPY $vgpr0_vgpr1
     %1:_(s32) = G_SEXTLOAD %0 :: (load 1, addrspace 0)
     $vgpr0 = COPY %1
@@ -24,11 +29,19 @@
   bb.0:
     liveins: $vgpr0_vgpr1
 
-    ; CHECK-LABEL: name: test_sextload_flat_i32_i16
-    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
-    ; CHECK: [[SEXTLOAD:%[0-9]+]]:_(s32) = G_SEXTLOAD [[COPY]](p0) :: (load 2)
-    ; CHECK: $vgpr0 = COPY [[SEXTLOAD]](s32)
-    %0:_(p0) = COPY $vgpr0_vgpr1
+    ; SI-LABEL: name: test_sextload_flat_i32_i16
+    ; SI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; SI: [[SEXTLOAD:%[0-9]+]]:_(s32) = G_SEXTLOAD [[COPY]](p0) :: (load 2)
+    ; SI: $vgpr0 = COPY [[SEXTLOAD]](s32)
+    ; VI-LABEL: name: test_sextload_flat_i32_i16
+    ; VI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; VI: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 2)
+    ; VI: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; VI: [[COPY1:%[0-9]+]]:_(s32) = COPY [[LOAD]](s32)
+    ; VI: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[COPY1]], [[C]](s32)
+    ; VI: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[SHL]], [[C]](s32)
+    ; VI: $vgpr0 = COPY [[ASHR]](s32)
+     %0:_(p0) = COPY $vgpr0_vgpr1
     %1:_(s32) = G_SEXTLOAD %0 :: (load 2, addrspace 0)
     $vgpr0 = COPY %1
 ...
@@ -38,11 +51,20 @@
   bb.0:
     liveins: $vgpr0_vgpr1
 
-    ; CHECK-LABEL: name: test_sextload_flat_i31_i8
-    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
-    ; CHECK: [[SEXTLOAD:%[0-9]+]]:_(s32) = G_SEXTLOAD [[COPY]](p0) :: (load 1)
-    ; CHECK: [[COPY1:%[0-9]+]]:_(s32) = COPY [[SEXTLOAD]](s32)
-    ; CHECK: $vgpr0 = COPY [[COPY1]](s32)
+    ; SI-LABEL: name: test_sextload_flat_i31_i8
+    ; SI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; SI: [[SEXTLOAD:%[0-9]+]]:_(s32) = G_SEXTLOAD [[COPY]](p0) :: (load 1)
+    ; SI: [[COPY1:%[0-9]+]]:_(s32) = COPY [[SEXTLOAD]](s32)
+    ; SI: $vgpr0 = COPY [[COPY1]](s32)
+    ; VI-LABEL: name: test_sextload_flat_i31_i8
+    ; VI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; VI: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 1)
+    ; VI: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 24
+    ; VI: [[COPY1:%[0-9]+]]:_(s32) = COPY [[LOAD]](s32)
+    ; VI: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[COPY1]], [[C]](s32)
+    ; VI: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[SHL]], [[C]](s32)
+    ; VI: [[COPY2:%[0-9]+]]:_(s32) = COPY [[ASHR]](s32)
+    ; VI: $vgpr0 = COPY [[COPY2]](s32)
     %0:_(p0) = COPY $vgpr0_vgpr1
     %1:_(s31) = G_SEXTLOAD %0 :: (load 1, addrspace 0)
     %2:_(s32) = G_ANYEXT %1
@@ -54,11 +76,20 @@
   bb.0:
     liveins: $vgpr0_vgpr1
 
-    ; CHECK-LABEL: name: test_sextload_flat_i64_i8
-    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
-    ; CHECK: [[SEXTLOAD:%[0-9]+]]:_(s32) = G_SEXTLOAD [[COPY]](p0) :: (load 1)
-    ; CHECK: [[SEXT:%[0-9]+]]:_(s64) = G_SEXT [[SEXTLOAD]](s32)
-    ; CHECK: $vgpr0_vgpr1 = COPY [[SEXT]](s64)
+    ; SI-LABEL: name: test_sextload_flat_i64_i8
+    ; SI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; SI: [[SEXTLOAD:%[0-9]+]]:_(s32) = G_SEXTLOAD [[COPY]](p0) :: (load 1)
+    ; SI: [[SEXT:%[0-9]+]]:_(s64) = G_SEXT [[SEXTLOAD]](s32)
+    ; SI: $vgpr0_vgpr1 = COPY [[SEXT]](s64)
+    ; VI-LABEL: name: test_sextload_flat_i64_i8
+    ; VI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; VI: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 1)
+    ; VI: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 24
+    ; VI: [[COPY1:%[0-9]+]]:_(s32) = COPY [[LOAD]](s32)
+    ; VI: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[COPY1]], [[C]](s32)
+    ; VI: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[SHL]], [[C]](s32)
+    ; VI: [[SEXT:%[0-9]+]]:_(s64) = G_SEXT [[ASHR]](s32)
+    ; VI: $vgpr0_vgpr1 = COPY [[SEXT]](s64)
     %0:_(p0) = COPY $vgpr0_vgpr1
     %1:_(s64) = G_SEXTLOAD %0 :: (load 1, addrspace 0)
     $vgpr0_vgpr1 = COPY %1
@@ -69,11 +100,20 @@
   bb.0:
     liveins: $vgpr0_vgpr1
 
-    ; CHECK-LABEL: name: test_sextload_flat_i64_i16
-    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
-    ; CHECK: [[SEXTLOAD:%[0-9]+]]:_(s32) = G_SEXTLOAD [[COPY]](p0) :: (load 2)
-    ; CHECK: [[SEXT:%[0-9]+]]:_(s64) = G_SEXT [[SEXTLOAD]](s32)
-    ; CHECK: $vgpr0_vgpr1 = COPY [[SEXT]](s64)
+    ; SI-LABEL: name: test_sextload_flat_i64_i16
+    ; SI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; SI: [[SEXTLOAD:%[0-9]+]]:_(s32) = G_SEXTLOAD [[COPY]](p0) :: (load 2)
+    ; SI: [[SEXT:%[0-9]+]]:_(s64) = G_SEXT [[SEXTLOAD]](s32)
+    ; SI: $vgpr0_vgpr1 = COPY [[SEXT]](s64)
+    ; VI-LABEL: name: test_sextload_flat_i64_i16
+    ; VI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; VI: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 2)
+    ; VI: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; VI: [[COPY1:%[0-9]+]]:_(s32) = COPY [[LOAD]](s32)
+    ; VI: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[COPY1]], [[C]](s32)
+    ; VI: [[ASHR:%[0-9]+]]:_(s32) = G_ASHR [[SHL]], [[C]](s32)
+    ; VI: [[SEXT:%[0-9]+]]:_(s64) = G_SEXT [[ASHR]](s32)
+    ; VI: $vgpr0_vgpr1 = COPY [[SEXT]](s64)
     %0:_(p0) = COPY $vgpr0_vgpr1
     %1:_(s64) = G_SEXTLOAD %0 :: (load 2, addrspace 0)
     $vgpr0_vgpr1 = COPY %1
@@ -84,11 +124,16 @@
   bb.0:
     liveins: $vgpr0_vgpr1
 
-    ; CHECK-LABEL: name: test_sextload_flat_i64_i32
-    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
-    ; CHECK: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 4)
-    ; CHECK: [[SEXT:%[0-9]+]]:_(s64) = G_SEXT [[LOAD]](s32)
-    ; CHECK: $vgpr0_vgpr1 = COPY [[SEXT]](s64)
+    ; SI-LABEL: name: test_sextload_flat_i64_i32
+    ; SI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; SI: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 4)
+    ; SI: [[SEXT:%[0-9]+]]:_(s64) = G_SEXT [[LOAD]](s32)
+    ; SI: $vgpr0_vgpr1 = COPY [[SEXT]](s64)
+    ; VI-LABEL: name: test_sextload_flat_i64_i32
+    ; VI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; VI: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 4)
+    ; VI: [[SEXT:%[0-9]+]]:_(s64) = G_SEXT [[LOAD]](s32)
+    ; VI: $vgpr0_vgpr1 = COPY [[SEXT]](s64)
     %0:_(p0) = COPY $vgpr0_vgpr1
     %1:_(s64) = G_SEXTLOAD %0 :: (load 4, addrspace 0)
     $vgpr0_vgpr1 = COPY %1
Index: llvm/trunk/test/CodeGen/AMDGPU/GlobalISel/legalize-zextload-flat.mir
===================================================================
--- llvm/trunk/test/CodeGen/AMDGPU/GlobalISel/legalize-zextload-flat.mir
+++ llvm/trunk/test/CodeGen/AMDGPU/GlobalISel/legalize-zextload-flat.mir
@@ -1,19 +1,23 @@
 # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
-# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=fiji -run-pass=legalizer -o - %s | FileCheck %s
-# RUN: not llc -mtriple=amdgcn-mesa-mesa3d -mcpu=tahiti -run-pass=legalizer -o /dev/null %s 2>&1 | FileCheck -check-prefix=ERROR %s
-
-# ERROR: LLVM ERROR: unable to legalize instruction: %2:_(s8) = G_LOAD %0:_(p0) :: (load 1) (in function: test_zextload_flat_i32_i8)
-
+# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=fiji -run-pass=legalizer -o - %s | FileCheck %s -check-prefixes=GCN,SI
+# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=tahiti -run-pass=legalizer -o - %s | FileCheck %s -check-prefixes=GCN,VI
 ---
 name: test_zextload_flat_i32_i8
 body: |
   bb.0:
     liveins: $vgpr0_vgpr1
 
-    ; CHECK-LABEL: name: test_zextload_flat_i32_i8
-    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
-    ; CHECK: [[ZEXTLOAD:%[0-9]+]]:_(s32) = G_ZEXTLOAD [[COPY]](p0) :: (load 1)
-    ; CHECK: $vgpr0 = COPY [[ZEXTLOAD]](s32)
+    ; SI-LABEL: name: test_zextload_flat_i32_i8
+    ; SI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; SI: [[ZEXTLOAD:%[0-9]+]]:_(s32) = G_ZEXTLOAD [[COPY]](p0) :: (load 1)
+    ; SI: $vgpr0 = COPY [[ZEXTLOAD]](s32)
+    ; VI-LABEL: name: test_zextload_flat_i32_i8
+    ; VI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; VI: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 1)
+    ; VI: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 255
+    ; VI: [[COPY1:%[0-9]+]]:_(s32) = COPY [[LOAD]](s32)
+    ; VI: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY1]], [[C]]
+    ; VI: $vgpr0 = COPY [[AND]](s32)
     %0:_(p0) = COPY $vgpr0_vgpr1
     %1:_(s32) = G_ZEXTLOAD %0 :: (load 1, addrspace 0)
     $vgpr0 = COPY %1
@@ -24,11 +28,18 @@
   bb.0:
     liveins: $vgpr0_vgpr1
 
-    ; CHECK-LABEL: name: test_zextload_flat_i32_i16
-    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
-    ; CHECK: [[ZEXTLOAD:%[0-9]+]]:_(s32) = G_ZEXTLOAD [[COPY]](p0) :: (load 2)
-    ; CHECK: $vgpr0 = COPY [[ZEXTLOAD]](s32)
-    %0:_(p0) = COPY $vgpr0_vgpr1
+    ; SI-LABEL: name: test_zextload_flat_i32_i16
+    ; SI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; SI: [[ZEXTLOAD:%[0-9]+]]:_(s32) = G_ZEXTLOAD [[COPY]](p0) :: (load 2)
+    ; SI: $vgpr0 = COPY [[ZEXTLOAD]](s32)
+    ; VI-LABEL: name: test_zextload_flat_i32_i16
+    ; VI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; VI: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 2)
+    ; VI: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 65535
+    ; VI: [[COPY1:%[0-9]+]]:_(s32) = COPY [[LOAD]](s32)
+    ; VI: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY1]], [[C]]
+    ; VI: $vgpr0 = COPY [[AND]](s32)
+     %0:_(p0) = COPY $vgpr0_vgpr1
     %1:_(s32) = G_ZEXTLOAD %0 :: (load 2, addrspace 0)
     $vgpr0 = COPY %1
 ...
@@ -38,11 +49,19 @@
   bb.0:
     liveins: $vgpr0_vgpr1
 
-    ; CHECK-LABEL: name: test_zextload_flat_i31_i8
-    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
-    ; CHECK: [[ZEXTLOAD:%[0-9]+]]:_(s32) = G_ZEXTLOAD [[COPY]](p0) :: (load 1)
-    ; CHECK: [[COPY1:%[0-9]+]]:_(s32) = COPY [[ZEXTLOAD]](s32)
-    ; CHECK: $vgpr0 = COPY [[COPY1]](s32)
+    ; SI-LABEL: name: test_zextload_flat_i31_i8
+    ; SI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; SI: [[ZEXTLOAD:%[0-9]+]]:_(s32) = G_ZEXTLOAD [[COPY]](p0) :: (load 1)
+    ; SI: [[COPY1:%[0-9]+]]:_(s32) = COPY [[ZEXTLOAD]](s32)
+    ; SI: $vgpr0 = COPY [[COPY1]](s32)
+    ; VI-LABEL: name: test_zextload_flat_i31_i8
+    ; VI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; VI: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 1)
+    ; VI: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 255
+    ; VI: [[COPY1:%[0-9]+]]:_(s32) = COPY [[LOAD]](s32)
+    ; VI: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY1]], [[C]]
+    ; VI: [[COPY2:%[0-9]+]]:_(s32) = COPY [[AND]](s32)
+    ; VI: $vgpr0 = COPY [[COPY2]](s32)
     %0:_(p0) = COPY $vgpr0_vgpr1
     %1:_(s31) = G_ZEXTLOAD %0 :: (load 1, addrspace 0)
     %2:_(s32) = G_ANYEXT %1
@@ -54,11 +73,19 @@
   bb.0:
     liveins: $vgpr0_vgpr1
 
-    ; CHECK-LABEL: name: test_zextload_flat_i64_i8
-    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
-    ; CHECK: [[ZEXTLOAD:%[0-9]+]]:_(s32) = G_ZEXTLOAD [[COPY]](p0) :: (load 1)
-    ; CHECK: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[ZEXTLOAD]](s32)
-    ; CHECK: $vgpr0_vgpr1 = COPY [[ZEXT]](s64)
+    ; SI-LABEL: name: test_zextload_flat_i64_i8
+    ; SI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; SI: [[ZEXTLOAD:%[0-9]+]]:_(s32) = G_ZEXTLOAD [[COPY]](p0) :: (load 1)
+    ; SI: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[ZEXTLOAD]](s32)
+    ; SI: $vgpr0_vgpr1 = COPY [[ZEXT]](s64)
+    ; VI-LABEL: name: test_zextload_flat_i64_i8
+    ; VI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; VI: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 1)
+    ; VI: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 255
+    ; VI: [[COPY1:%[0-9]+]]:_(s32) = COPY [[LOAD]](s32)
+    ; VI: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY1]], [[C]]
+    ; VI: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[AND]](s32)
+    ; VI: $vgpr0_vgpr1 = COPY [[ZEXT]](s64)
     %0:_(p0) = COPY $vgpr0_vgpr1
     %1:_(s64) = G_ZEXTLOAD %0 :: (load 1, addrspace 0)
     $vgpr0_vgpr1 = COPY %1
@@ -69,11 +96,19 @@
   bb.0:
     liveins: $vgpr0_vgpr1
 
-    ; CHECK-LABEL: name: test_zextload_flat_i64_i16
-    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
-    ; CHECK: [[ZEXTLOAD:%[0-9]+]]:_(s32) = G_ZEXTLOAD [[COPY]](p0) :: (load 2)
-    ; CHECK: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[ZEXTLOAD]](s32)
-    ; CHECK: $vgpr0_vgpr1 = COPY [[ZEXT]](s64)
+    ; SI-LABEL: name: test_zextload_flat_i64_i16
+    ; SI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; SI: [[ZEXTLOAD:%[0-9]+]]:_(s32) = G_ZEXTLOAD [[COPY]](p0) :: (load 2)
+    ; SI: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[ZEXTLOAD]](s32)
+    ; SI: $vgpr0_vgpr1 = COPY [[ZEXT]](s64)
+    ; VI-LABEL: name: test_zextload_flat_i64_i16
+    ; VI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; VI: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 2)
+    ; VI: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 65535
+    ; VI: [[COPY1:%[0-9]+]]:_(s32) = COPY [[LOAD]](s32)
+    ; VI: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY1]], [[C]]
+    ; VI: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[AND]](s32)
+    ; VI: $vgpr0_vgpr1 = COPY [[ZEXT]](s64)
     %0:_(p0) = COPY $vgpr0_vgpr1
     %1:_(s64) = G_ZEXTLOAD %0 :: (load 2, addrspace 0)
     $vgpr0_vgpr1 = COPY %1
@@ -84,11 +119,16 @@
   bb.0:
     liveins: $vgpr0_vgpr1
 
-    ; CHECK-LABEL: name: test_zextload_flat_i64_i32
-    ; CHECK: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
-    ; CHECK: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 4)
-    ; CHECK: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[LOAD]](s32)
-    ; CHECK: $vgpr0_vgpr1 = COPY [[ZEXT]](s64)
+    ; SI-LABEL: name: test_zextload_flat_i64_i32
+    ; SI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; SI: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 4)
+    ; SI: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[LOAD]](s32)
+    ; SI: $vgpr0_vgpr1 = COPY [[ZEXT]](s64)
+    ; VI-LABEL: name: test_zextload_flat_i64_i32
+    ; VI: [[COPY:%[0-9]+]]:_(p0) = COPY $vgpr0_vgpr1
+    ; VI: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 4)
+    ; VI: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[LOAD]](s32)
+    ; VI: $vgpr0_vgpr1 = COPY [[ZEXT]](s64)
     %0:_(p0) = COPY $vgpr0_vgpr1
     %1:_(s64) = G_ZEXTLOAD %0 :: (load 4, addrspace 0)
     $vgpr0_vgpr1 = COPY %1
Index: llvm/trunk/test/CodeGen/Mips/GlobalISel/instruction-select/truncStore_and_aExtLoad.mir
===================================================================
--- llvm/trunk/test/CodeGen/Mips/GlobalISel/instruction-select/truncStore_and_aExtLoad.mir
+++ llvm/trunk/test/CodeGen/Mips/GlobalISel/instruction-select/truncStore_and_aExtLoad.mir
@@ -0,0 +1,83 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -O0 -mtriple=mipsel-linux-gnu -run-pass=instruction-select -verify-machineinstrs %s -o - | FileCheck %s -check-prefixes=MIPS32
+--- |
+
+  define void @load_store_i8(i8* %px, i8* %py) {entry: ret void}
+  define void @load_store_i16(i16* %px, i16* %py) {entry: ret void}
+  define void @load_store_i32(i32* %px, i32* %py) {entry: ret void}
+
+...
+---
+name:            load_store_i8
+alignment:       2
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: load_store_i8
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:gpr32 = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:gpr32 = COPY $a1
+    ; MIPS32: [[LBu:%[0-9]+]]:gpr32 = LBu [[COPY1]], 0 :: (load 1 from %ir.py)
+    ; MIPS32: SB [[LBu]], [[COPY]], 0 :: (store 1 into %ir.px)
+    ; MIPS32: RetRA
+    %0:gprb(p0) = COPY $a0
+    %1:gprb(p0) = COPY $a1
+    %4:gprb(s32) = G_LOAD %1(p0) :: (load 1 from %ir.py)
+    %3:gprb(s32) = COPY %4(s32)
+    G_STORE %3(s32), %0(p0) :: (store 1 into %ir.px)
+    RetRA
+
+...
+---
+name:            load_store_i16
+alignment:       2
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: load_store_i16
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:gpr32 = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:gpr32 = COPY $a1
+    ; MIPS32: [[LHu:%[0-9]+]]:gpr32 = LHu [[COPY1]], 0 :: (load 2 from %ir.py)
+    ; MIPS32: SH [[LHu]], [[COPY]], 0 :: (store 2 into %ir.px)
+    ; MIPS32: RetRA
+    %0:gprb(p0) = COPY $a0
+    %1:gprb(p0) = COPY $a1
+    %4:gprb(s32) = G_LOAD %1(p0) :: (load 2 from %ir.py)
+    %3:gprb(s32) = COPY %4(s32)
+    G_STORE %3(s32), %0(p0) :: (store 2 into %ir.px)
+    RetRA
+
+...
+---
+name:            load_store_i32
+alignment:       2
+legalized:       true
+regBankSelected: true
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: load_store_i32
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:gpr32 = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:gpr32 = COPY $a1
+    ; MIPS32: [[LW:%[0-9]+]]:gpr32 = LW [[COPY1]], 0 :: (load 4 from %ir.py)
+    ; MIPS32: SW [[LW]], [[COPY]], 0 :: (store 4 into %ir.px)
+    ; MIPS32: RetRA
+    %0:gprb(p0) = COPY $a0
+    %1:gprb(p0) = COPY $a1
+    %2:gprb(s32) = G_LOAD %1(p0) :: (load 4 from %ir.py)
+    G_STORE %2(s32), %0(p0) :: (store 4 into %ir.px)
+    RetRA
+
+...
Index: llvm/trunk/test/CodeGen/Mips/GlobalISel/legalizer/truncStore_and_aExtLoad.mir
===================================================================
--- llvm/trunk/test/CodeGen/Mips/GlobalISel/legalizer/truncStore_and_aExtLoad.mir
+++ llvm/trunk/test/CodeGen/Mips/GlobalISel/legalizer/truncStore_and_aExtLoad.mir
@@ -0,0 +1,145 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -O0 -mtriple=mipsel-linux-gnu -run-pass=legalizer -verify-machineinstrs %s -o - | FileCheck %s -check-prefixes=MIPS32
+--- |
+
+  define void @load1_s8_to_load1_s32(i8* %px) {entry: ret void}
+  define void @load2_s16_to_load2_s32(i16* %px) {entry: ret void}
+  define void @load_store_i1(i1* %px, i1* %py) {entry: ret void}
+  define void @load_store_i8(i8* %px, i8* %py) {entry: ret void}
+  define void @load_store_i16(i16* %px, i16* %py) {entry: ret void}
+  define void @load_store_i32(i32* %px, i32* %py) {entry: ret void}
+
+...
+---
+name:            load1_s8_to_load1_s32
+alignment:       2
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0
+
+    ; MIPS32-LABEL: name: load1_s8_to_load1_s32
+    ; MIPS32: liveins: $a0
+    ; MIPS32: [[COPY:%[0-9]+]]:_(p0) = COPY $a0
+    ; MIPS32: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 1 from %ir.px)
+    ; MIPS32: $v0 = COPY [[LOAD]](s32)
+    ; MIPS32: RetRA implicit $v0
+    %0:_(p0) = COPY $a0
+    %2:_(s32) = G_LOAD %0(p0) :: (load 1 from %ir.px)
+    $v0 = COPY %2(s32)
+    RetRA implicit $v0
+
+...
+---
+name:            load2_s16_to_load2_s32
+alignment:       2
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0
+
+    ; MIPS32-LABEL: name: load2_s16_to_load2_s32
+    ; MIPS32: liveins: $a0
+    ; MIPS32: [[COPY:%[0-9]+]]:_(p0) = COPY $a0
+    ; MIPS32: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY]](p0) :: (load 2 from %ir.px)
+    ; MIPS32: $v0 = COPY [[LOAD]](s32)
+    ; MIPS32: RetRA implicit $v0
+    %0:_(p0) = COPY $a0
+    %2:_(s32) = G_LOAD %0(p0) :: (load 2 from %ir.px)
+    $v0 = COPY %2(s32)
+    RetRA implicit $v0
+
+...
+---
+name:            load_store_i1
+alignment:       2
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: load_store_i1
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:_(p0) = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:_(p0) = COPY $a1
+    ; MIPS32: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY1]](p0) :: (load 1 from %ir.py)
+    ; MIPS32: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
+    ; MIPS32: [[COPY2:%[0-9]+]]:_(s32) = COPY [[LOAD]](s32)
+    ; MIPS32: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY2]], [[C]]
+    ; MIPS32: G_STORE [[AND]](s32), [[COPY]](p0) :: (store 1 into %ir.px)
+    ; MIPS32: RetRA
+    %0:_(p0) = COPY $a0
+    %1:_(p0) = COPY $a1
+    %2:_(s1) = G_LOAD %1(p0) :: (load 1 from %ir.py)
+    G_STORE %2(s1), %0(p0) :: (store 1 into %ir.px)
+    RetRA
+
+...
+---
+name:            load_store_i8
+alignment:       2
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: load_store_i8
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:_(p0) = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:_(p0) = COPY $a1
+    ; MIPS32: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY1]](p0) :: (load 1 from %ir.py)
+    ; MIPS32: [[COPY2:%[0-9]+]]:_(s32) = COPY [[LOAD]](s32)
+    ; MIPS32: G_STORE [[COPY2]](s32), [[COPY]](p0) :: (store 1 into %ir.px)
+    ; MIPS32: RetRA
+    %0:_(p0) = COPY $a0
+    %1:_(p0) = COPY $a1
+    %2:_(s8) = G_LOAD %1(p0) :: (load 1 from %ir.py)
+    G_STORE %2(s8), %0(p0) :: (store 1 into %ir.px)
+    RetRA
+
+...
+---
+name:            load_store_i16
+alignment:       2
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: load_store_i16
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:_(p0) = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:_(p0) = COPY $a1
+    ; MIPS32: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY1]](p0) :: (load 2 from %ir.py)
+    ; MIPS32: [[COPY2:%[0-9]+]]:_(s32) = COPY [[LOAD]](s32)
+    ; MIPS32: G_STORE [[COPY2]](s32), [[COPY]](p0) :: (store 2 into %ir.px)
+    ; MIPS32: RetRA
+    %0:_(p0) = COPY $a0
+    %1:_(p0) = COPY $a1
+    %2:_(s16) = G_LOAD %1(p0) :: (load 2 from %ir.py)
+    G_STORE %2(s16), %0(p0) :: (store 2 into %ir.px)
+    RetRA
+
+...
+---
+name:            load_store_i32
+alignment:       2
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: load_store_i32
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:_(p0) = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:_(p0) = COPY $a1
+    ; MIPS32: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[COPY1]](p0) :: (load 4 from %ir.py)
+    ; MIPS32: G_STORE [[LOAD]](s32), [[COPY]](p0) :: (store 4 into %ir.px)
+    ; MIPS32: RetRA
+    %0:_(p0) = COPY $a0
+    %1:_(p0) = COPY $a1
+    %2:_(s32) = G_LOAD %1(p0) :: (load 4 from %ir.py)
+    G_STORE %2(s32), %0(p0) :: (store 4 into %ir.px)
+    RetRA
+
+...
Index: llvm/trunk/test/CodeGen/Mips/GlobalISel/llvm-ir/truncStore_and_aExtLoad.ll
===================================================================
--- llvm/trunk/test/CodeGen/Mips/GlobalISel/llvm-ir/truncStore_and_aExtLoad.ll
+++ llvm/trunk/test/CodeGen/Mips/GlobalISel/llvm-ir/truncStore_and_aExtLoad.ll
@@ -0,0 +1,79 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc  -O0 -mtriple=mipsel-linux-gnu -global-isel  -verify-machineinstrs %s -o -| FileCheck %s -check-prefixes=MIPS32
+
+define i8 @load1_s8_to_load1_s32(i8* %px) {
+; MIPS32-LABEL: load1_s8_to_load1_s32:
+; MIPS32:       # %bb.0: # %entry
+; MIPS32-NEXT:    lbu $2, 0($4)
+; MIPS32-NEXT:    jr $ra
+; MIPS32-NEXT:    nop
+entry:
+  %0 = load i8, i8* %px
+  ret i8 %0
+}
+
+define i16 @load2_s16_to_load2_s32(i16* %px) {
+; MIPS32-LABEL: load2_s16_to_load2_s32:
+; MIPS32:       # %bb.0: # %entry
+; MIPS32-NEXT:    lhu $2, 0($4)
+; MIPS32-NEXT:    jr $ra
+; MIPS32-NEXT:    nop
+entry:
+  %0 = load i16, i16* %px
+  ret i16 %0
+}
+
+define void @load_store_i1(i1* %px, i1* %py) {
+; MIPS32-LABEL: load_store_i1:
+; MIPS32:       # %bb.0: # %entry
+; MIPS32-NEXT:    lbu $5, 0($5)
+; MIPS32-NEXT:    lui $1, 0
+; MIPS32-NEXT:    ori $1, $1, 1
+; MIPS32-NEXT:    and $1, $5, $1
+; MIPS32-NEXT:    sb $1, 0($4)
+; MIPS32-NEXT:    jr $ra
+; MIPS32-NEXT:    nop
+entry:
+  %0 = load i1, i1* %py
+  store i1 %0, i1* %px
+  ret void
+}
+
+define void @load_store_i8(i8* %px, i8* %py) {
+; MIPS32-LABEL: load_store_i8:
+; MIPS32:       # %bb.0: # %entry
+; MIPS32-NEXT:    lbu $5, 0($5)
+; MIPS32-NEXT:    sb $5, 0($4)
+; MIPS32-NEXT:    jr $ra
+; MIPS32-NEXT:    nop
+entry:
+  %0 = load i8, i8* %py
+  store i8 %0, i8* %px
+  ret void
+}
+
+define void @load_store_i16(i16* %px, i16* %py) {
+; MIPS32-LABEL: load_store_i16:
+; MIPS32:       # %bb.0: # %entry
+; MIPS32-NEXT:    lhu $5, 0($5)
+; MIPS32-NEXT:    sh $5, 0($4)
+; MIPS32-NEXT:    jr $ra
+; MIPS32-NEXT:    nop
+entry:
+  %0 = load i16, i16* %py
+  store i16 %0, i16* %px
+  ret void
+}
+
+define void @load_store_i32(i32* %px, i32* %py) {
+; MIPS32-LABEL: load_store_i32:
+; MIPS32:       # %bb.0: # %entry
+; MIPS32-NEXT:    lw $5, 0($5)
+; MIPS32-NEXT:    sw $5, 0($4)
+; MIPS32-NEXT:    jr $ra
+; MIPS32-NEXT:    nop
+entry:
+  %0 = load i32, i32* %py
+  store i32 %0, i32* %px
+  ret void
+}
Index: llvm/trunk/test/CodeGen/Mips/GlobalISel/regbankselect/truncStore_and_aExtLoad.mir
===================================================================
--- llvm/trunk/test/CodeGen/Mips/GlobalISel/regbankselect/truncStore_and_aExtLoad.mir
+++ llvm/trunk/test/CodeGen/Mips/GlobalISel/regbankselect/truncStore_and_aExtLoad.mir
@@ -0,0 +1,82 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -O0 -mtriple=mipsel-linux-gnu -run-pass=regbankselect -verify-machineinstrs %s -o - | FileCheck %s -check-prefixes=MIPS32
+--- |
+
+  define void @load_store_i8(i8* %px, i8* %py) {entry: ret void}
+  define void @load_store_i16(i16* %px, i16* %py) {entry: ret void}
+  define void @load_store_i32(i32* %px, i32* %py) {entry: ret void}
+
+...
+---
+name:            load_store_i8
+alignment:       2
+legalized:       true
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: load_store_i8
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:gprb(p0) = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:gprb(p0) = COPY $a1
+    ; MIPS32: [[LOAD:%[0-9]+]]:gprb(s32) = G_LOAD [[COPY1]](p0) :: (load 1 from %ir.py)
+    ; MIPS32: [[COPY2:%[0-9]+]]:gprb(s32) = COPY [[LOAD]](s32)
+    ; MIPS32: G_STORE [[COPY2]](s32), [[COPY]](p0) :: (store 1 into %ir.px)
+    ; MIPS32: RetRA
+    %0:_(p0) = COPY $a0
+    %1:_(p0) = COPY $a1
+    %4:_(s32) = G_LOAD %1(p0) :: (load 1 from %ir.py)
+    %3:_(s32) = COPY %4(s32)
+    G_STORE %3(s32), %0(p0) :: (store 1 into %ir.px)
+    RetRA
+
+...
+---
+name:            load_store_i16
+alignment:       2
+legalized:       true
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: load_store_i16
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:gprb(p0) = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:gprb(p0) = COPY $a1
+    ; MIPS32: [[LOAD:%[0-9]+]]:gprb(s32) = G_LOAD [[COPY1]](p0) :: (load 2 from %ir.py)
+    ; MIPS32: [[COPY2:%[0-9]+]]:gprb(s32) = COPY [[LOAD]](s32)
+    ; MIPS32: G_STORE [[COPY2]](s32), [[COPY]](p0) :: (store 2 into %ir.px)
+    ; MIPS32: RetRA
+    %0:_(p0) = COPY $a0
+    %1:_(p0) = COPY $a1
+    %4:_(s32) = G_LOAD %1(p0) :: (load 2 from %ir.py)
+    %3:_(s32) = COPY %4(s32)
+    G_STORE %3(s32), %0(p0) :: (store 2 into %ir.px)
+    RetRA
+
+...
+---
+name:            load_store_i32
+alignment:       2
+legalized:       true
+tracksRegLiveness: true
+body:             |
+  bb.1.entry:
+    liveins: $a0, $a1
+
+    ; MIPS32-LABEL: name: load_store_i32
+    ; MIPS32: liveins: $a0, $a1
+    ; MIPS32: [[COPY:%[0-9]+]]:gprb(p0) = COPY $a0
+    ; MIPS32: [[COPY1:%[0-9]+]]:gprb(p0) = COPY $a1
+    ; MIPS32: [[LOAD:%[0-9]+]]:gprb(s32) = G_LOAD [[COPY1]](p0) :: (load 4 from %ir.py)
+    ; MIPS32: G_STORE [[LOAD]](s32), [[COPY]](p0) :: (store 4 into %ir.px)
+    ; MIPS32: RetRA
+    %0:_(p0) = COPY $a0
+    %1:_(p0) = COPY $a1
+    %2:_(s32) = G_LOAD %1(p0) :: (load 4 from %ir.py)
+    G_STORE %2(s32), %0(p0) :: (store 4 into %ir.px)
+    RetRA
+
+...