diff --git a/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp b/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
--- a/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
@@ -1267,8 +1267,9 @@
     ConstantSDNode *C1 = cast<ConstantSDNode>(N1);
     unsigned OffsetValue0 = C1->getZExtValue() / Align;
     unsigned OffsetValue1 = OffsetValue0 + 1;
+    bool OffsetIsAligned = Align * OffsetValue0 == C1->getZExtValue();
     // (add n0, c0)
-    if (isDSOffsetLegal(N0, OffsetValue1, 8)) {
+    if (isDSOffsetLegal(N0, OffsetValue1, 8) && OffsetIsAligned) {
       Base = N0;
       Offset0 = CurDAG->getTargetConstant(OffsetValue0, DL, MVT::i8);
       Offset1 = CurDAG->getTargetConstant(OffsetValue1, DL, MVT::i8);
@@ -1280,8 +1281,9 @@
             dyn_cast<ConstantSDNode>(Addr.getOperand(0))) {
       unsigned OffsetValue0 = C->getZExtValue() / Align;
       unsigned OffsetValue1 = OffsetValue0 + 1;
+      bool OffsetIsAligned = Align * OffsetValue0 == C->getZExtValue();
 
-      if (isUInt<8>(OffsetValue0)) {
+      if (isUInt<8>(OffsetValue0) && OffsetIsAligned) {
         SDLoc DL(Addr);
         SDValue Zero = CurDAG->getTargetConstant(0, DL, MVT::i32);
 
diff --git a/llvm/test/CodeGen/AMDGPU/ds-sub-offset.ll b/llvm/test/CodeGen/AMDGPU/ds-sub-offset.ll
--- a/llvm/test/CodeGen/AMDGPU/ds-sub-offset.ll
+++ b/llvm/test/CodeGen/AMDGPU/ds-sub-offset.ll
@@ -194,20 +194,20 @@
 ; CI-LABEL: add_x_shl_neg_to_sub_misaligned_i64_max_offset:
 ; CI:       ; %bb.0:
 ; CI-NEXT:    v_lshlrev_b32_e32 v0, 2, v0
-; CI-NEXT:    v_sub_i32_e32 v0, vcc, 0, v0
+; CI-NEXT:    v_sub_i32_e32 v0, vcc, 0x3fb, v0
 ; CI-NEXT:    v_mov_b32_e32 v1, 0x7b
 ; CI-NEXT:    v_mov_b32_e32 v2, 0
 ; CI-NEXT:    s_mov_b32 m0, -1
-; CI-NEXT:    ds_write2_b32 v0, v1, v2 offset0:254 offset1:255
+; CI-NEXT:    ds_write2_b32 v0, v1, v2 offset1:1
 ; CI-NEXT:    s_endpgm
 ;
 ; GFX9-LABEL: add_x_shl_neg_to_sub_misaligned_i64_max_offset:
 ; GFX9:       ; %bb.0:
 ; GFX9-NEXT:    v_lshlrev_b32_e32 v0, 2, v0
-; GFX9-NEXT:    v_sub_u32_e32 v0, 0, v0
+; GFX9-NEXT:    v_sub_u32_e32 v0, 0x3fb, v0
 ; GFX9-NEXT:    v_mov_b32_e32 v1, 0x7b
 ; GFX9-NEXT:    v_mov_b32_e32 v2, 0
-; GFX9-NEXT:    ds_write2_b32 v0, v1, v2 offset0:254 offset1:255
+; GFX9-NEXT:    ds_write2_b32 v0, v1, v2 offset1:1
 ; GFX9-NEXT:    s_endpgm
   %x.i = call i32 @llvm.amdgcn.workitem.id.x() #0
   %neg = sub i32 0, %x.i
@@ -223,7 +223,7 @@
 ; CI:       ; %bb.0:
 ; CI-NEXT:    s_load_dword s0, s[0:1], 0x9
 ; CI-NEXT:    v_lshlrev_b32_e32 v0, 2, v0
-; CI-NEXT:    v_sub_i32_e32 v0, vcc, 0, v0
+; CI-NEXT:    v_sub_i32_e32 v0, vcc, 0x3fb, v0
 ; CI-NEXT:    s_mov_b64 vcc, 0
 ; CI-NEXT:    v_mov_b32_e32 v2, 0x7b
 ; CI-NEXT:    s_waitcnt lgkmcnt(0)
@@ -235,7 +235,7 @@
 ; CI-NEXT:    s_mov_b32 s3, 0xf000
 ; CI-NEXT:    s_mov_b32 s2, -1
 ; CI-NEXT:    s_mov_b32 s1, s0
-; CI-NEXT:    ds_write2_b32 v0, v2, v3 offset0:254 offset1:255
+; CI-NEXT:    ds_write2_b32 v0, v2, v3 offset1:1
 ; CI-NEXT:    buffer_store_dword v1, off, s[0:3], 0
 ; CI-NEXT:    s_endpgm
 ;
@@ -244,13 +244,13 @@
 ; GFX9-NEXT:    s_load_dword s0, s[0:1], 0x24
 ; GFX9-NEXT:    s_mov_b64 vcc, 0
 ; GFX9-NEXT:    v_lshlrev_b32_e32 v0, 2, v0
-; GFX9-NEXT:    v_sub_u32_e32 v0, 0, v0
+; GFX9-NEXT:    v_sub_u32_e32 v0, 0x3fb, v0
 ; GFX9-NEXT:    v_mov_b32_e32 v3, 0
 ; GFX9-NEXT:    s_waitcnt lgkmcnt(0)
 ; GFX9-NEXT:    v_mov_b32_e32 v1, s0
 ; GFX9-NEXT:    v_div_fmas_f32 v2, v1, v1, v1
 ; GFX9-NEXT:    v_mov_b32_e32 v1, 0x7b
-; GFX9-NEXT:    ds_write2_b32 v0, v1, v3 offset0:254 offset1:255
+; GFX9-NEXT:    ds_write2_b32 v0, v1, v3 offset1:1
 ; GFX9-NEXT:    v_mov_b32_e32 v0, 0
 ; GFX9-NEXT:    v_mov_b32_e32 v1, 0
 ; GFX9-NEXT:    global_store_dword v[0:1], v2, off
diff --git a/llvm/test/CodeGen/AMDGPU/ds_read2.ll b/llvm/test/CodeGen/AMDGPU/ds_read2.ll
--- a/llvm/test/CodeGen/AMDGPU/ds_read2.ll
+++ b/llvm/test/CodeGen/AMDGPU/ds_read2.ll
@@ -713,8 +713,8 @@
 ; GFX9-UNALIGNED-NEXT:    s_load_dword s0, s[0:1], 0x2c
 ; GFX9-UNALIGNED-NEXT:    v_lshlrev_b32_e32 v2, 2, v0
 ; GFX9-UNALIGNED-NEXT:    s_waitcnt lgkmcnt(0)
-; GFX9-UNALIGNED-NEXT:    v_add_u32_e32 v0, s0, v2
-; GFX9-UNALIGNED-NEXT:    ds_read2_b32 v[0:1], v0 offset0:1 offset1:2
+; GFX9-UNALIGNED-NEXT:    v_add3_u32 v0, s0, v2, 5
+; GFX9-UNALIGNED-NEXT:    ds_read2_b32 v[0:1], v0 offset1:1
 ; GFX9-UNALIGNED-NEXT:    s_waitcnt lgkmcnt(0)
 ; GFX9-UNALIGNED-NEXT:    v_add_f32_e32 v0, v0, v1
 ; GFX9-UNALIGNED-NEXT:    global_store_dword v2, v0, s[2:3]
diff --git a/llvm/test/CodeGen/AMDGPU/ds_write2.ll b/llvm/test/CodeGen/AMDGPU/ds_write2.ll
--- a/llvm/test/CodeGen/AMDGPU/ds_write2.ll
+++ b/llvm/test/CodeGen/AMDGPU/ds_write2.ll
@@ -725,9 +725,11 @@
 ; GFX9-UNALIGNED-NEXT:    s_waitcnt lgkmcnt(0)
 ; GFX9-UNALIGNED-NEXT:    global_load_dwordx2 v[0:1], v2, s[2:3]
 ; GFX9-UNALIGNED-NEXT:    v_add_u32_e32 v2, s0, v2
+; GFX9-UNALIGNED-NEXT:    v_add_u32_e32 v3, 5, v2
+; GFX9-UNALIGNED-NEXT:    v_add_u32_e32 v2, 9, v2
 ; GFX9-UNALIGNED-NEXT:    s_waitcnt vmcnt(0)
-; GFX9-UNALIGNED-NEXT:    ds_write2_b32 v2, v0, v1 offset0:1 offset1:2
-; GFX9-UNALIGNED-NEXT:    ds_write2_b32 v2, v0, v1 offset0:2 offset1:3
+; GFX9-UNALIGNED-NEXT:    ds_write2_b32 v3, v0, v1 offset1:1
+; GFX9-UNALIGNED-NEXT:    ds_write2_b32 v2, v0, v1 offset1:1
 ; GFX9-UNALIGNED-NEXT:    s_endpgm
   %x.i = tail call i32 @llvm.amdgcn.workitem.id.x() #1
   %in.gep = getelementptr double, double addrspace(1)* %in, i32 %x.i