Index: llvm/test/CodeGen/M68k/GlobalISel/legalize-load-store.mir
===================================================================
--- llvm/test/CodeGen/M68k/GlobalISel/legalize-load-store.mir
+++ llvm/test/CodeGen/M68k/GlobalISel/legalize-load-store.mir
@@ -63,4 +63,36 @@
     RTS
 
 ...
+---
+name:            test_store_i128
+fixedStack:
+  - { id: 0, 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_store_i128
+    ; CHECK: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(p0) = G_LOAD [[FRAME_INDEX]](p0) :: (load (p0) from %fixed-stack.0, align 8)
+    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
+    ; CHECK-NEXT: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
+    ; CHECK-NEXT: [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 3
+    ; CHECK-NEXT: [[C3:%[0-9]+]]:_(s32) = G_CONSTANT i32 4
+    ; CHECK-NEXT: G_STORE [[C]](s32), [[LOAD]](p0) :: (store (s32), align 16)
+    ; CHECK-NEXT: [[C4:%[0-9]+]]:_(s32) = G_CONSTANT i32 4
+    ; CHECK-NEXT: [[PTR_ADD:%[0-9]+]]:_(p0) = G_PTR_ADD [[LOAD]], [[C4]](s32)
+    ; CHECK-NEXT: G_STORE [[C1]](s32), [[PTR_ADD]](p0) :: (store (s32) into unknown-address + 4)
+    ; CHECK-NEXT: [[C5:%[0-9]+]]:_(s32) = G_CONSTANT i32 8
+    ; CHECK-NEXT: [[PTR_ADD1:%[0-9]+]]:_(p0) = G_PTR_ADD [[LOAD]], [[C5]](s32)
+    ; CHECK-NEXT: G_STORE [[C2]](s32), [[PTR_ADD1]](p0) :: (store (s32) into unknown-address + 8, align 8)
+    ; CHECK-NEXT: [[C6:%[0-9]+]]:_(s32) = G_CONSTANT i32 12
+    ; CHECK-NEXT: [[PTR_ADD2:%[0-9]+]]:_(p0) = G_PTR_ADD [[LOAD]], [[C6]](s32)
+    ; CHECK-NEXT: G_STORE [[C3]](s32), [[PTR_ADD2]](p0) :: (store (s32) into unknown-address + 12)
+    ; CHECK-NEXT: RTS
+    %1:_(p0) = G_FRAME_INDEX %fixed-stack.0
+    %0:_(p0) = G_LOAD %1(p0) :: (load (p0) from %fixed-stack.0, align 8)
+    %2:_(s128) = G_CONSTANT i128 316912650112397582603894390785; 0x4000000030000000200000001
+    G_STORE %2(s128), %0(p0) :: (store (s128))
+    RTS
 
+...