Index: llvm/lib/Target/M68k/GISel/M68kLegalizerInfo.cpp
===================================================================
--- llvm/lib/Target/M68k/GISel/M68kLegalizerInfo.cpp
+++ llvm/lib/Target/M68k/GISel/M68kLegalizerInfo.cpp
@@ -21,13 +21,32 @@
 
 M68kLegalizerInfo::M68kLegalizerInfo(const M68kSubtarget &ST) {
   using namespace TargetOpcode;
-  const LLT S32 = LLT::scalar(32);
-  const LLT P0 = LLT::pointer(0, 32);
-  getActionDefinitionsBuilder(G_LOAD).legalFor({S32});
-  getActionDefinitionsBuilder(G_FRAME_INDEX).legalFor({P0});
-  getActionDefinitionsBuilder(G_ADD).legalFor({S32});
-  getActionDefinitionsBuilder(G_SUB).legalFor({S32});
-  getActionDefinitionsBuilder(G_MUL).legalFor({S32});
-  getActionDefinitionsBuilder(G_UDIV).legalFor({S32});
+  const LLT s8 = LLT::scalar(8);
+  const LLT s16 = LLT::scalar(16);
+  const LLT s32 = LLT::scalar(32);
+  const LLT p0 = LLT::pointer(0, 32);
+
+  getActionDefinitionsBuilder({G_ADD, G_SUB, G_MUL, G_UDIV, G_AND})
+      .legalFor({s8, s16, s32})
+      .clampScalar(0, s8, s32)
+      .widenScalarToNextPow2(0, 8);
+
+  getActionDefinitionsBuilder(G_CONSTANT)
+      .legalFor({s32, p0})
+      .clampScalar(0, s32, s32);
+
+  getActionDefinitionsBuilder({G_FRAME_INDEX, G_GLOBAL_VALUE}).legalFor({p0});
+
+  getActionDefinitionsBuilder({G_STORE, G_LOAD})
+      .legalForTypesWithMemDesc({{s32, p0, s32, 4},
+                                 {s32, p0, s16, 4},
+                                 {s32, p0, s8, 4},
+                                 {s16, p0, s16, 2},
+                                 {s8, p0, s8, 1},
+                                 {p0, p0, s32, 4}})
+      .clampScalar(0, s8, s32);
+
+  getActionDefinitionsBuilder(G_PTR_ADD).legalFor({{p0, s32}});
+
   getLegacyLegalizerInfo().computeTables();
 }
Index: llvm/test/CodeGen/M68k/GlobalISel/legalize-add.mir
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/M68k/GlobalISel/legalize-add.mir
@@ -0,0 +1,66 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -march=m68k -run-pass=legalizer %s -o - | FileCheck %s
+---
+name:            test_scalar_small
+fixedStack:
+  - { id: 0, type: default, offset: 4, size: 1, alignment: 4, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+  - { id: 1, type: default, offset: 0, size: 1, alignment: 8, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+body:             |
+  bb.1:
+    ; CHECK-LABEL: name: test_scalar_small
+    ; CHECK: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX]](p0) :: (load (s8) from %fixed-stack.0, align 8)
+    ; CHECK-NEXT: [[FRAME_INDEX1:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    ; CHECK-NEXT: [[LOAD1:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX1]](p0) :: (load (s8) from %fixed-stack.1, align 4)
+    ; CHECK-NEXT: [[TRUNC:%[0-9]+]]:_(s8) = G_TRUNC [[LOAD]](s32)
+    ; CHECK-NEXT: [[TRUNC1:%[0-9]+]]:_(s8) = G_TRUNC [[LOAD1]](s32)
+    ; CHECK-NEXT: [[ADD:%[0-9]+]]:_(s8) = G_ADD [[TRUNC]], [[TRUNC1]]
+    ; CHECK-NEXT: $bd0 = COPY [[ADD]](s8)
+    ; CHECK-NEXT: RTS implicit $bd0
+    %3:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    %2:_(s32) = G_LOAD %3(p0) :: (load (s8) from %fixed-stack.1, align 8)
+    %0:_(s1) = G_TRUNC %2(s32)
+    %5:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    %4:_(s32) = G_LOAD %5(p0) :: (load (s8) from %fixed-stack.0, align 4)
+    %1:_(s1) = G_TRUNC %4(s32)
+    %6:_(s1) = G_ADD %0, %1
+    %7:_(s8) = G_ANYEXT %6(s1)
+    $bd0 = COPY %7(s8)
+    RTS implicit $bd0
+
+...
+---
+name:            test_scalar_nonpow2
+fixedStack:
+  - { id: 0, type: default, offset: 4, size: 4, alignment: 4, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+  - { id: 1, type: default, offset: 0, size: 4, alignment: 8, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+body:             |
+  bb.1:
+    ; CHECK-LABEL: name: test_scalar_nonpow2
+    ; CHECK: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX]](p0) :: (load (s32) from %fixed-stack.0, align 8)
+    ; CHECK-NEXT: [[FRAME_INDEX1:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    ; CHECK-NEXT: [[LOAD1:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX1]](p0) :: (load (s32) from %fixed-stack.1)
+    ; CHECK-NEXT: [[ADD:%[0-9]+]]:_(s32) = G_ADD [[LOAD]], [[LOAD1]]
+    ; CHECK-NEXT: $d0 = COPY [[ADD]](s32)
+    ; CHECK-NEXT: RTS implicit $d0
+    %3:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    %2:_(s32) = G_LOAD %3(p0) :: (load (s32) from %fixed-stack.1, align 8)
+    %0:_(s17) = G_TRUNC %2(s32)
+    %5:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    %4:_(s32) = G_LOAD %5(p0) :: (load (s32) from %fixed-stack.0)
+    %1:_(s17) = G_TRUNC %4(s32)
+    %6:_(s17) = G_ADD %0, %1
+    %7:_(s32) = G_ANYEXT %6(s17)
+    $d0 = COPY %7(s32)
+    RTS implicit $d0
+
+...
Index: llvm/test/CodeGen/M68k/GlobalISel/legalize-and.mir
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/M68k/GlobalISel/legalize-and.mir
@@ -0,0 +1,67 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -march=m68k -run-pass=legalizer %s -o - | FileCheck %s
+
+---
+name:            test_scalar_and_small
+fixedStack:
+  - { id: 0, type: default, offset: 4, size: 1, alignment: 4, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+  - { id: 1, type: default, offset: 0, size: 1, alignment: 8, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+body:             |
+  bb.1:
+    ; CHECK-LABEL: name: test_scalar_and_small
+    ; CHECK: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX]](p0) :: (load (s8) from %fixed-stack.0, align 8)
+    ; CHECK-NEXT: [[FRAME_INDEX1:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    ; CHECK-NEXT: [[LOAD1:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX1]](p0) :: (load (s8) from %fixed-stack.1, align 4)
+    ; CHECK-NEXT: [[TRUNC:%[0-9]+]]:_(s8) = G_TRUNC [[LOAD]](s32)
+    ; CHECK-NEXT: [[TRUNC1:%[0-9]+]]:_(s8) = G_TRUNC [[LOAD1]](s32)
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s8) = G_AND [[TRUNC]], [[TRUNC1]]
+    ; CHECK-NEXT: $bd0 = COPY [[AND]](s8)
+    ; CHECK-NEXT: RTS implicit $bd0
+    %3:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    %2:_(s32) = G_LOAD %3(p0) :: (load (s8) from %fixed-stack.1, align 8)
+    %0:_(s2) = G_TRUNC %2(s32)
+    %5:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    %4:_(s32) = G_LOAD %5(p0) :: (load (s8) from %fixed-stack.0, align 4)
+    %1:_(s2) = G_TRUNC %4(s32)
+    %6:_(s2) = G_AND %0, %1
+    %7:_(s8) = G_ANYEXT %6(s2)
+    $bd0 = COPY %7(s8)
+    RTS implicit $bd0
+
+...
+---
+name:            test_scalar_nonpow2
+fixedStack:
+  - { id: 0, type: default, offset: 4, size: 4, alignment: 4, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+  - { id: 1, type: default, offset: 0, size: 4, alignment: 8, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+body:             |
+  bb.1:
+    ; CHECK-LABEL: name: test_scalar_nonpow2
+    ; CHECK: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX]](p0) :: (load (s32) from %fixed-stack.0, align 8)
+    ; CHECK-NEXT: [[FRAME_INDEX1:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    ; CHECK-NEXT: [[LOAD1:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX1]](p0) :: (load (s32) from %fixed-stack.1)
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s32) = G_AND [[LOAD]], [[LOAD1]]
+    ; CHECK-NEXT: $d0 = COPY [[AND]](s32)
+    ; CHECK-NEXT: RTS implicit $d0
+    %3:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    %2:_(s32) = G_LOAD %3(p0) :: (load (s32) from %fixed-stack.1, align 8)
+    %0:_(s17) = G_TRUNC %2(s32)
+    %5:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    %4:_(s32) = G_LOAD %5(p0) :: (load (s32) from %fixed-stack.0)
+    %1:_(s17) = G_TRUNC %4(s32)
+    %6:_(s17) = G_AND %0, %1
+    %7:_(s32) = G_ANYEXT %6(s17)
+    $d0 = COPY %7(s32)
+    RTS implicit $d0
+
+...
Index: llvm/test/CodeGen/M68k/GlobalISel/legalize-load-store.mir
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/M68k/GlobalISel/legalize-load-store.mir
@@ -0,0 +1,66 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -march=m68k -run-pass=legalizer %s -o - | FileCheck %s
+
+---
+name:            test_load_store
+fixedStack:
+  - { id: 0, type: default, offset: 20, size: 4, alignment: 4, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+  - { id: 1, type: default, offset: 16, size: 4, alignment: 8, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+  - { id: 2, type: default, offset: 12, size: 4, alignment: 4, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+  - { id: 3, type: default, offset: 8, size: 2, alignment: 8, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+  - { id: 4, type: default, offset: 4, size: 4, alignment: 4, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+  - { id: 5, type: default, offset: 0, size: 1, alignment: 8, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+body:             |
+  bb.1 :
+    ; CHECK-LABEL: name: test_load_store
+    ; CHECK: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX]](p0) :: (load (s8) from %fixed-stack.0, align 8)
+    ; CHECK-NEXT: [[TRUNC:%[0-9]+]]:_(s8) = G_TRUNC [[LOAD]](s32)
+    ; CHECK-NEXT: [[FRAME_INDEX1:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    ; CHECK-NEXT: [[LOAD1:%[0-9]+]]:_(p0) = G_LOAD [[FRAME_INDEX1]](p0) :: (load (p0) from %fixed-stack.1)
+    ; CHECK-NEXT: [[FRAME_INDEX2:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.2
+    ; CHECK-NEXT: [[LOAD2:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX2]](p0) :: (load (s16) from %fixed-stack.2, align 8)
+    ; CHECK-NEXT: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[LOAD2]](s32)
+    ; CHECK-NEXT: [[FRAME_INDEX3:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.3
+    ; CHECK-NEXT: [[LOAD3:%[0-9]+]]:_(p0) = G_LOAD [[FRAME_INDEX3]](p0) :: (load (p0) from %fixed-stack.3)
+    ; CHECK-NEXT: [[FRAME_INDEX4:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.4
+    ; CHECK-NEXT: [[LOAD4:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX4]](p0) :: (load (s32) from %fixed-stack.4, align 8)
+    ; CHECK-NEXT: [[FRAME_INDEX5:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.5
+    ; CHECK-NEXT: [[LOAD5:%[0-9]+]]:_(p0) = G_LOAD [[FRAME_INDEX5]](p0) :: (load (p0) from %fixed-stack.5)
+    ; CHECK-NEXT: G_STORE [[TRUNC]](s8), [[LOAD1]](p0) :: (store (s8))
+    ; CHECK-NEXT: G_STORE [[TRUNC1]](s16), [[LOAD3]](p0) :: (store (s16))
+    ; CHECK-NEXT: G_STORE [[LOAD4]](s32), [[LOAD5]](p0) :: (store (s32))
+    ; CHECK-NEXT: RTS
+    %7:_(p0) = G_FRAME_INDEX %fixed-stack.5
+    %6:_(s32) = G_LOAD %7(p0) :: (load (s8) from %fixed-stack.5, align 8)
+    %0:_(s8) = G_TRUNC %6(s32)
+    %8:_(p0) = G_FRAME_INDEX %fixed-stack.4
+    %1:_(p0) = G_LOAD %8(p0) :: (load (p0) from %fixed-stack.4)
+    %10:_(p0) = G_FRAME_INDEX %fixed-stack.3
+    %9:_(s32) = G_LOAD %10(p0) :: (load (s16) from %fixed-stack.3, align 8)
+    %2:_(s16) = G_TRUNC %9(s32)
+    %11:_(p0) = G_FRAME_INDEX %fixed-stack.2
+    %3:_(p0) = G_LOAD %11(p0) :: (load (p0) from %fixed-stack.2)
+    %12:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    %4:_(s32) = G_LOAD %12(p0) :: (load (s32) from %fixed-stack.1, align 8)
+    %13:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    %5:_(p0) = G_LOAD %13(p0) :: (load (p0) from %fixed-stack.0)
+    G_STORE %0(s8), %1(p0) :: (store (s8))
+    G_STORE %2(s16), %3(p0) :: (store (s16))
+    G_STORE %4(s32), %5(p0) :: (store (s32))
+    RTS
+
+...
+
Index: llvm/test/CodeGen/M68k/GlobalISel/legalize-mul.mir
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/M68k/GlobalISel/legalize-mul.mir
@@ -0,0 +1,67 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -march=m68k -run-pass=legalizer %s -o - | FileCheck %s
+
+---
+name:            test_scalar_small
+fixedStack:
+  - { id: 0, type: default, offset: 4, size: 1, alignment: 4, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+  - { id: 1, type: default, offset: 0, size: 1, alignment: 8, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+body:             |
+  bb.1:
+    ; CHECK-LABEL: name: test_scalar_small
+    ; CHECK: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX]](p0) :: (load (s8) from %fixed-stack.0, align 8)
+    ; CHECK-NEXT: [[FRAME_INDEX1:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    ; CHECK-NEXT: [[LOAD1:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX1]](p0) :: (load (s8) from %fixed-stack.1, align 4)
+    ; CHECK-NEXT: [[TRUNC:%[0-9]+]]:_(s8) = G_TRUNC [[LOAD]](s32)
+    ; CHECK-NEXT: [[TRUNC1:%[0-9]+]]:_(s8) = G_TRUNC [[LOAD1]](s32)
+    ; CHECK-NEXT: [[MUL:%[0-9]+]]:_(s8) = G_MUL [[TRUNC]], [[TRUNC1]]
+    ; CHECK-NEXT: $bd0 = COPY [[MUL]](s8)
+    ; CHECK-NEXT: RTS implicit $bd0
+    %3:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    %2:_(s32) = G_LOAD %3(p0) :: (load (s8) from %fixed-stack.1, align 8)
+    %0:_(s2) = G_TRUNC %2(s32)
+    %5:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    %4:_(s32) = G_LOAD %5(p0) :: (load (s8) from %fixed-stack.0, align 4)
+    %1:_(s2) = G_TRUNC %4(s32)
+    %6:_(s2) = G_MUL %0, %1
+    %7:_(s8) = G_ANYEXT %6(s2)
+    $bd0 = COPY %7(s8)
+    RTS implicit $bd0
+
+...
+---
+name:            test_scalar_nonpow2
+fixedStack:
+  - { id: 0, type: default, offset: 4, size: 4, alignment: 4, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+  - { id: 1, type: default, offset: 0, size: 4, alignment: 8, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+body:             |
+  bb.1:
+    ; CHECK-LABEL: name: test_scalar_nonpow2
+    ; CHECK: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX]](p0) :: (load (s32) from %fixed-stack.0, align 8)
+    ; CHECK-NEXT: [[FRAME_INDEX1:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    ; CHECK-NEXT: [[LOAD1:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX1]](p0) :: (load (s32) from %fixed-stack.1)
+    ; CHECK-NEXT: [[MUL:%[0-9]+]]:_(s32) = G_MUL [[LOAD]], [[LOAD1]]
+    ; CHECK-NEXT: $d0 = COPY [[MUL]](s32)
+    ; CHECK-NEXT: RTS implicit $d0
+    %3:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    %2:_(s32) = G_LOAD %3(p0) :: (load (s32) from %fixed-stack.1, align 8)
+    %0:_(s17) = G_TRUNC %2(s32)
+    %5:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    %4:_(s32) = G_LOAD %5(p0) :: (load (s32) from %fixed-stack.0)
+    %1:_(s17) = G_TRUNC %4(s32)
+    %6:_(s17) = G_MUL %0, %1
+    %7:_(s32) = G_ANYEXT %6(s17)
+    $d0 = COPY %7(s32)
+    RTS implicit $d0
+
+...
Index: llvm/test/CodeGen/M68k/GlobalISel/legalize-sub.mir
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/M68k/GlobalISel/legalize-sub.mir
@@ -0,0 +1,68 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -march=m68k -run-pass=legalizer %s -o - | FileCheck %s
+
+---
+name:            test_scalar_small
+fixedStack:
+  - { id: 0, type: default, offset: 4, size: 1, alignment: 4, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+  - { id: 1, type: default, offset: 0, size: 1, alignment: 8, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+
+body:             |
+  bb.1:
+    ; CHECK-LABEL: name: test_scalar_small
+    ; CHECK: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX]](p0) :: (load (s8) from %fixed-stack.0, align 8)
+    ; CHECK-NEXT: [[FRAME_INDEX1:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    ; CHECK-NEXT: [[LOAD1:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX1]](p0) :: (load (s8) from %fixed-stack.1, align 4)
+    ; CHECK-NEXT: [[TRUNC:%[0-9]+]]:_(s8) = G_TRUNC [[LOAD]](s32)
+    ; CHECK-NEXT: [[TRUNC1:%[0-9]+]]:_(s8) = G_TRUNC [[LOAD1]](s32)
+    ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s8) = G_SUB [[TRUNC]], [[TRUNC1]]
+    ; CHECK-NEXT: $bd0 = COPY [[SUB]](s8)
+    ; CHECK-NEXT: RTS implicit $bd0
+    %3:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    %2:_(s32) = G_LOAD %3(p0) :: (load (s8) from %fixed-stack.1, align 8)
+    %0:_(s2) = G_TRUNC %2(s32)
+    %5:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    %4:_(s32) = G_LOAD %5(p0) :: (load (s8) from %fixed-stack.0, align 4)
+    %1:_(s2) = G_TRUNC %4(s32)
+    %6:_(s2) = G_SUB %0, %1
+    %7:_(s8) = G_ANYEXT %6(s2)
+    $bd0 = COPY %7(s8)
+    RTS implicit $bd0
+
+...
+---
+name:            test_scalar_nonpow2
+fixedStack:
+  - { id: 0, type: default, offset: 4, size: 4, alignment: 4, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+  - { id: 1, type: default, offset: 0, size: 4, alignment: 8, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+body:             |
+  bb.1:
+    ; CHECK-LABEL: name: test_scalar_nonpow2
+    ; CHECK: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX]](p0) :: (load (s32) from %fixed-stack.0, align 8)
+    ; CHECK-NEXT: [[FRAME_INDEX1:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    ; CHECK-NEXT: [[LOAD1:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX1]](p0) :: (load (s32) from %fixed-stack.1)
+    ; CHECK-NEXT: [[SUB:%[0-9]+]]:_(s32) = G_SUB [[LOAD]], [[LOAD1]]
+    ; CHECK-NEXT: $d0 = COPY [[SUB]](s32)
+    ; CHECK-NEXT: RTS implicit $d0
+    %3:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    %2:_(s32) = G_LOAD %3(p0) :: (load (s32) from %fixed-stack.1, align 8)
+    %0:_(s17) = G_TRUNC %2(s32)
+    %5:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    %4:_(s32) = G_LOAD %5(p0) :: (load (s32) from %fixed-stack.0)
+    %1:_(s17) = G_TRUNC %4(s32)
+    %6:_(s17) = G_SUB %0, %1
+    %7:_(s32) = G_ANYEXT %6(s17)
+    $d0 = COPY %7(s32)
+    RTS implicit $d0
+
+...
Index: llvm/test/CodeGen/M68k/GlobalISel/legalize-udiv.mir
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/M68k/GlobalISel/legalize-udiv.mir
@@ -0,0 +1,76 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -march=m68k -run-pass=legalizer %s -o - | FileCheck %s
+---
+name:            test_scalar_small
+fixedStack:
+  - { id: 0, type: default, offset: 4, size: 1, alignment: 4, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+  - { id: 1, type: default, offset: 0, size: 1, alignment: 8, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+body:             |
+  bb.1:
+    ; CHECK-LABEL: name: test_scalar_small
+    ; CHECK: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX]](p0) :: (load (s8) from %fixed-stack.0, align 8)
+    ; CHECK-NEXT: [[FRAME_INDEX1:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    ; CHECK-NEXT: [[LOAD1:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX1]](p0) :: (load (s8) from %fixed-stack.1, align 4)
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 3
+    ; CHECK-NEXT: [[TRUNC:%[0-9]+]]:_(s8) = G_TRUNC [[C]](s32)
+    ; CHECK-NEXT: [[TRUNC1:%[0-9]+]]:_(s8) = G_TRUNC [[LOAD]](s32)
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s8) = G_AND [[TRUNC1]], [[TRUNC]]
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 3
+    ; CHECK-NEXT: [[TRUNC2:%[0-9]+]]:_(s8) = G_TRUNC [[C1]](s32)
+    ; CHECK-NEXT: [[TRUNC3:%[0-9]+]]:_(s8) = G_TRUNC [[LOAD1]](s32)
+    ; CHECK-NEXT: [[AND1:%[0-9]+]]:_(s8) = G_AND [[TRUNC3]], [[TRUNC2]]
+    ; CHECK-NEXT: [[UDIV:%[0-9]+]]:_(s8) = G_UDIV [[AND]], [[AND1]]
+    ; CHECK-NEXT: $bd0 = COPY [[UDIV]](s8)
+    ; CHECK-NEXT: RTS implicit $bd0
+    %3:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    %2:_(s32) = G_LOAD %3(p0) :: (load (s8) from %fixed-stack.1, align 8)
+    %0:_(s2) = G_TRUNC %2(s32)
+    %5:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    %4:_(s32) = G_LOAD %5(p0) :: (load (s8) from %fixed-stack.0, align 4)
+    %1:_(s2) = G_TRUNC %4(s32)
+    %6:_(s2) = G_UDIV %0, %1
+    %7:_(s8) = G_ANYEXT %6(s2)
+    $bd0 = COPY %7(s8)
+    RTS implicit $bd0
+
+...
+---
+name:            test_scalar_nonpow2
+fixedStack:
+  - { id: 0, type: default, offset: 4, size: 4, alignment: 4, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+  - { id: 1, type: default, offset: 0, size: 4, alignment: 8, stack-id: default,
+      isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
+      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
+body:             |
+  bb.1:
+    ; CHECK-LABEL: name: test_scalar_nonpow2
+    ; CHECK: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX]](p0) :: (load (s32) from %fixed-stack.0, align 8)
+    ; CHECK-NEXT: [[FRAME_INDEX1:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    ; CHECK-NEXT: [[LOAD1:%[0-9]+]]:_(s32) = G_LOAD [[FRAME_INDEX1]](p0) :: (load (s32) from %fixed-stack.1)
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 131071
+    ; CHECK-NEXT: [[AND:%[0-9]+]]:_(s32) = G_AND [[LOAD]], [[C]]
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 131071
+    ; CHECK-NEXT: [[AND1:%[0-9]+]]:_(s32) = G_AND [[LOAD1]], [[C1]]
+    ; CHECK-NEXT: [[UDIV:%[0-9]+]]:_(s32) = G_UDIV [[AND]], [[AND1]]
+    ; CHECK-NEXT: $d0 = COPY [[UDIV]](s32)
+    ; CHECK-NEXT: RTS implicit $d0
+    %3:_(p0) = G_FRAME_INDEX %fixed-stack.1
+    %2:_(s32) = G_LOAD %3(p0) :: (load (s32) from %fixed-stack.1, align 8)
+    %0:_(s17) = G_TRUNC %2(s32)
+    %5:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    %4:_(s32) = G_LOAD %5(p0) :: (load (s32) from %fixed-stack.0)
+    %1:_(s17) = G_TRUNC %4(s32)
+    %6:_(s17) = G_UDIV %0, %1
+    %7:_(s32) = G_ANYEXT %6(s17)
+    $d0 = COPY %7(s32)
+    RTS implicit $d0
+
+...