diff --git a/llvm/include/llvm/CodeGen/GlobalISel/LegalizationArtifactCombiner.h b/llvm/include/llvm/CodeGen/GlobalISel/LegalizationArtifactCombiner.h
--- a/llvm/include/llvm/CodeGen/GlobalISel/LegalizationArtifactCombiner.h
+++ b/llvm/include/llvm/CodeGen/GlobalISel/LegalizationArtifactCombiner.h
@@ -278,6 +278,20 @@
       return true;
     }
 
+    // trunc(trunc) -> trunc
+    Register TruncSrc;
+    if (mi_match(SrcReg, MRI, m_GTrunc(m_Reg(TruncSrc)))) {
+      // Always combine trunc(trunc) since the eventual resulting trunc must be
+      // legal anyway as it must be legal for all outputs of the consumer type
+      // set.
+      LLVM_DEBUG(dbgs() << ".. Combine G_TRUNC(G_TRUNC): " << MI);
+
+      Builder.buildTrunc(DstReg, TruncSrc);
+      UpdatedDefs.push_back(DstReg);
+      markInstAndDefDead(MI, *MRI.getVRegDef(TruncSrc), DeadInsts);
+      return true;
+    }
+
     return false;
   }
 
diff --git a/llvm/test/CodeGen/AArch64/GlobalISel/legalize-load-trunc.mir b/llvm/test/CodeGen/AArch64/GlobalISel/legalize-load-trunc.mir
--- a/llvm/test/CodeGen/AArch64/GlobalISel/legalize-load-trunc.mir
+++ b/llvm/test/CodeGen/AArch64/GlobalISel/legalize-load-trunc.mir
@@ -12,9 +12,8 @@
     ; CHECK-LABEL: name: test_load_trunc
     ; CHECK: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %stack.0
     ; CHECK: [[LOAD:%[0-9]+]]:_(s16) = G_LOAD [[FRAME_INDEX]](p0) :: (load 2)
-    ; CHECK: [[TRUNC:%[0-9]+]]:_(s10) = G_TRUNC [[LOAD]](s16)
-    ; CHECK: [[TRUNC1:%[0-9]+]]:_(s1) = G_TRUNC [[TRUNC]](s10)
-    ; CHECK: RET_ReallyLR implicit [[TRUNC1]](s1)
+    ; CHECK: [[TRUNC:%[0-9]+]]:_(s1) = G_TRUNC [[LOAD]](s16)
+    ; CHECK: RET_ReallyLR implicit [[TRUNC]](s1)
     %0:_(p0) = G_FRAME_INDEX %stack.0
     %1:_(s10) = G_LOAD %0(p0) :: (load 2)
     %2:_(s1) = G_TRUNC %1(s10)
diff --git a/llvm/test/CodeGen/AMDGPU/GlobalISel/artifact-combiner-trunc.mir b/llvm/test/CodeGen/AMDGPU/GlobalISel/artifact-combiner-trunc.mir
--- a/llvm/test/CodeGen/AMDGPU/GlobalISel/artifact-combiner-trunc.mir
+++ b/llvm/test/CodeGen/AMDGPU/GlobalISel/artifact-combiner-trunc.mir
@@ -118,15 +118,13 @@
 
 body: |
   bb.0:
-    ; Test that trunc(merge) with trunc-size > merge-source-size is not combined
-    ; if trunc-size % merge-source-size != 0
+    ; Test that trunc(merge) with trunc-size > merge-source-size and
+    ; trunc-size % merge-source-size != 0 can be combined after the G_TRUNCs
+    ; have been combined.
     ; CHECK-LABEL: name: trunc_s68_merge_s128_s32
     ; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
     ; CHECK: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
-    ; CHECK: [[MV:%[0-9]+]]:_(s128) = G_MERGE_VALUES [[C]](s32), [[C1]](s32), [[C]](s32), [[C1]](s32)
-    ; CHECK: [[TRUNC:%[0-9]+]]:_(s68) = G_TRUNC [[MV]](s128)
-    ; CHECK: [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[TRUNC]](s68)
-    ; CHECK: $vgpr0 = COPY [[TRUNC1]](s32)
+    ; CHECK: $vgpr0 = COPY [[C]](s32)
     %0:_(s32) = G_CONSTANT i32 0
     %1:_(s32) = G_CONSTANT i32 1
     %2:_(s128) = G_MERGE_VALUES %0, %1, %0, %1
@@ -134,3 +132,19 @@
     %4:_(s32) = G_TRUNC %3
     $vgpr0 = COPY %4
 ...
+
+---
+name: trunc_trunc
+
+body: |
+  bb.0:
+    ; Test that trunc(trunc) is combined to a single trunc
+    ; CHECK-LABEL: name: trunc_trunc
+    ; CHECK: [[DEF:%[0-9]+]]:_(s64) = G_IMPLICIT_DEF
+    ; CHECK: [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[DEF]](s64)
+    ; CHECK: $vgpr0 = COPY [[TRUNC]](s32)
+    %0:_(s64) = G_IMPLICIT_DEF
+    %1:_(s48) = G_TRUNC %0
+    %2:_(s32) = G_TRUNC %1
+    $vgpr0 = COPY %2
+...
diff --git a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-bitcast.mir b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-bitcast.mir
--- a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-bitcast.mir
+++ b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-bitcast.mir
@@ -340,8 +340,7 @@
     ; CHECK: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[AND1]], [[C]](s32)
     ; CHECK: [[OR:%[0-9]+]]:_(s32) = G_OR [[AND]], [[SHL]]
     ; CHECK: [[BITCAST:%[0-9]+]]:_(<2 x s16>) = G_BITCAST [[OR]](s32)
-    ; CHECK: [[COPY4:%[0-9]+]]:_(s32) = COPY [[TRUNC]](s32)
-    ; CHECK: [[AND2:%[0-9]+]]:_(s32) = G_AND [[COPY4]], [[C1]]
+    ; CHECK: [[AND2:%[0-9]+]]:_(s32) = G_AND [[TRUNC]], [[C1]]
     ; CHECK: [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
     ; CHECK: [[SHL1:%[0-9]+]]:_(s32) = G_SHL [[C2]], [[C]](s32)
     ; CHECK: [[OR1:%[0-9]+]]:_(s32) = G_OR [[AND2]], [[SHL1]]
@@ -355,10 +354,10 @@
     ; CHECK: [[LSHR2:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST2]], [[C]](s32)
     ; CHECK: [[BITCAST3:%[0-9]+]]:_(s32) = G_BITCAST [[UV3]](<2 x s16>)
     ; CHECK: [[LSHR3:%[0-9]+]]:_(s32) = G_LSHR [[BITCAST3]], [[C]](s32)
-    ; CHECK: [[COPY5:%[0-9]+]]:_(s32) = COPY [[BITCAST2]](s32)
-    ; CHECK: [[COPY6:%[0-9]+]]:_(s32) = COPY [[LSHR2]](s32)
-    ; CHECK: [[COPY7:%[0-9]+]]:_(s32) = COPY [[BITCAST3]](s32)
-    ; CHECK: [[BUILD_VECTOR:%[0-9]+]]:_(<3 x s32>) = G_BUILD_VECTOR [[COPY5]](s32), [[COPY6]](s32), [[COPY7]](s32)
+    ; CHECK: [[COPY4:%[0-9]+]]:_(s32) = COPY [[BITCAST2]](s32)
+    ; CHECK: [[COPY5:%[0-9]+]]:_(s32) = COPY [[LSHR2]](s32)
+    ; CHECK: [[COPY6:%[0-9]+]]:_(s32) = COPY [[BITCAST3]](s32)
+    ; CHECK: [[BUILD_VECTOR:%[0-9]+]]:_(<3 x s32>) = G_BUILD_VECTOR [[COPY4]](s32), [[COPY5]](s32), [[COPY6]](s32)
     ; CHECK: $vgpr0_vgpr1_vgpr2 = COPY [[BUILD_VECTOR]](<3 x s32>)
     %0:_(s64) = COPY $vgpr0_vgpr1
     %1:_(s48) = G_TRUNC %0
diff --git a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-extract.mir b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-extract.mir
--- a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-extract.mir
+++ b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-extract.mir
@@ -56,8 +56,7 @@
     ; CHECK-LABEL: name: test_extract_s16_s31_offset0
     ; CHECK: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
     ; CHECK: [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
-    ; CHECK: [[COPY1:%[0-9]+]]:_(s32) = COPY [[TRUNC]](s32)
-    ; CHECK: $vgpr0 = COPY [[COPY1]](s32)
+    ; CHECK: $vgpr0 = COPY [[TRUNC]](s32)
     %0:_(s64) = COPY $vgpr0_vgpr1
     %1:_(s31) = G_TRUNC %0
     %2:_(s16) = G_EXTRACT %1, 0
diff --git a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-implicit-def-s1025.mir b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-implicit-def-s1025.mir
--- a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-implicit-def-s1025.mir
+++ b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-implicit-def-s1025.mir
@@ -1,16 +1,513 @@
-# RUN: not --crash llc -O0 -mtriple=amdgcn-mesa-mesa3d -mcpu=tahiti -run-pass=legalizer %s -o - 2>&1 | FileCheck %s
-# RUN: not --crash llc -O0 -mtriple=amdgcn-mesa-mesa3d -mcpu=fiji -run-pass=legalizer %s -o - 2>&1 | FileCheck %s
-
-# This test is not legalizable and produces more than 9000 instructions for it
-# before it fails, including legalizer artifacts like
-# %foo:_(s65600) = G_MERGE_VALUES. Since it is not really feasible to have that
-# many CHECK-lines, only the presence of the error is checked.
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -O0 -mtriple=amdgcn-mesa-mesa3d -mcpu=tahiti -run-pass=legalizer %s -o - | FileCheck %s --check-prefix=TAHITI
+# RUN: llc -O0 -mtriple=amdgcn-mesa-mesa3d -mcpu=fiji -run-pass=legalizer %s -o - | FileCheck %s --check-prefix=FIJI
 
 ---
 name: test_implicit_def_s1025
 body: |
   bb.0:
-    ; CHECK: LLVM ERROR: unable to legalize instruction: %{{[0-9]+}}:_(s65600) = G_MERGE_VALUES
+    ; TAHITI-LABEL: name: test_implicit_def_s1025
+    ; TAHITI: [[DEF:%[0-9]+]]:_(s1024) = G_IMPLICIT_DEF
+    ; TAHITI: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32), [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32), [[UV4:%[0-9]+]]:_(s32), [[UV5:%[0-9]+]]:_(s32), [[UV6:%[0-9]+]]:_(s32), [[UV7:%[0-9]+]]:_(s32), [[UV8:%[0-9]+]]:_(s32), [[UV9:%[0-9]+]]:_(s32), [[UV10:%[0-9]+]]:_(s32), [[UV11:%[0-9]+]]:_(s32), [[UV12:%[0-9]+]]:_(s32), [[UV13:%[0-9]+]]:_(s32), [[UV14:%[0-9]+]]:_(s32), [[UV15:%[0-9]+]]:_(s32), [[UV16:%[0-9]+]]:_(s32), [[UV17:%[0-9]+]]:_(s32), [[UV18:%[0-9]+]]:_(s32), [[UV19:%[0-9]+]]:_(s32), [[UV20:%[0-9]+]]:_(s32), [[UV21:%[0-9]+]]:_(s32), [[UV22:%[0-9]+]]:_(s32), [[UV23:%[0-9]+]]:_(s32), [[UV24:%[0-9]+]]:_(s32), [[UV25:%[0-9]+]]:_(s32), [[UV26:%[0-9]+]]:_(s32), [[UV27:%[0-9]+]]:_(s32), [[UV28:%[0-9]+]]:_(s32), [[UV29:%[0-9]+]]:_(s32), [[UV30:%[0-9]+]]:_(s32), [[UV31:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[DEF]](s1024)
+    ; TAHITI: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[UV]](s32)
+    ; TAHITI: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; TAHITI: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[UV]], [[C]](s32)
+    ; TAHITI: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR]](s32)
+    ; TAHITI: [[C1:%[0-9]+]]:_(s16) = G_CONSTANT i16 1
+    ; TAHITI: [[C2:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
+    ; TAHITI: [[COPY:%[0-9]+]]:_(s32) = COPY [[C2]](s32)
+    ; TAHITI: [[C3:%[0-9]+]]:_(s32) = G_CONSTANT i32 65535
+    ; TAHITI: [[COPY1:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; TAHITI: [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY1]], [[C3]]
+    ; TAHITI: [[LSHR1:%[0-9]+]]:_(s32) = G_LSHR [[AND]], [[COPY]](s32)
+    ; TAHITI: [[C4:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
+    ; TAHITI: [[COPY2:%[0-9]+]]:_(s32) = COPY [[C4]](s32)
+    ; TAHITI: [[COPY3:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; TAHITI: [[AND1:%[0-9]+]]:_(s32) = G_AND [[COPY3]], [[C3]]
+    ; TAHITI: [[LSHR2:%[0-9]+]]:_(s32) = G_LSHR [[AND1]], [[COPY2]](s32)
+    ; TAHITI: [[C5:%[0-9]+]]:_(s32) = G_CONSTANT i32 3
+    ; TAHITI: [[COPY4:%[0-9]+]]:_(s32) = COPY [[C5]](s32)
+    ; TAHITI: [[COPY5:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; TAHITI: [[AND2:%[0-9]+]]:_(s32) = G_AND [[COPY5]], [[C3]]
+    ; TAHITI: [[LSHR3:%[0-9]+]]:_(s32) = G_LSHR [[AND2]], [[COPY4]](s32)
+    ; TAHITI: [[C6:%[0-9]+]]:_(s32) = G_CONSTANT i32 4
+    ; TAHITI: [[COPY6:%[0-9]+]]:_(s32) = COPY [[C6]](s32)
+    ; TAHITI: [[COPY7:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; TAHITI: [[AND3:%[0-9]+]]:_(s32) = G_AND [[COPY7]], [[C3]]
+    ; TAHITI: [[LSHR4:%[0-9]+]]:_(s32) = G_LSHR [[AND3]], [[COPY6]](s32)
+    ; TAHITI: [[C7:%[0-9]+]]:_(s32) = G_CONSTANT i32 5
+    ; TAHITI: [[COPY8:%[0-9]+]]:_(s32) = COPY [[C7]](s32)
+    ; TAHITI: [[COPY9:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; TAHITI: [[AND4:%[0-9]+]]:_(s32) = G_AND [[COPY9]], [[C3]]
+    ; TAHITI: [[LSHR5:%[0-9]+]]:_(s32) = G_LSHR [[AND4]], [[COPY8]](s32)
+    ; TAHITI: [[C8:%[0-9]+]]:_(s32) = G_CONSTANT i32 6
+    ; TAHITI: [[COPY10:%[0-9]+]]:_(s32) = COPY [[C8]](s32)
+    ; TAHITI: [[COPY11:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; TAHITI: [[AND5:%[0-9]+]]:_(s32) = G_AND [[COPY11]], [[C3]]
+    ; TAHITI: [[LSHR6:%[0-9]+]]:_(s32) = G_LSHR [[AND5]], [[COPY10]](s32)
+    ; TAHITI: [[C9:%[0-9]+]]:_(s32) = G_CONSTANT i32 7
+    ; TAHITI: [[COPY12:%[0-9]+]]:_(s32) = COPY [[C9]](s32)
+    ; TAHITI: [[COPY13:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; TAHITI: [[AND6:%[0-9]+]]:_(s32) = G_AND [[COPY13]], [[C3]]
+    ; TAHITI: [[LSHR7:%[0-9]+]]:_(s32) = G_LSHR [[AND6]], [[COPY12]](s32)
+    ; TAHITI: [[C10:%[0-9]+]]:_(s32) = G_CONSTANT i32 8
+    ; TAHITI: [[COPY14:%[0-9]+]]:_(s32) = COPY [[C10]](s32)
+    ; TAHITI: [[COPY15:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; TAHITI: [[AND7:%[0-9]+]]:_(s32) = G_AND [[COPY15]], [[C3]]
+    ; TAHITI: [[LSHR8:%[0-9]+]]:_(s32) = G_LSHR [[AND7]], [[COPY14]](s32)
+    ; TAHITI: [[C11:%[0-9]+]]:_(s32) = G_CONSTANT i32 9
+    ; TAHITI: [[COPY16:%[0-9]+]]:_(s32) = COPY [[C11]](s32)
+    ; TAHITI: [[COPY17:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; TAHITI: [[AND8:%[0-9]+]]:_(s32) = G_AND [[COPY17]], [[C3]]
+    ; TAHITI: [[LSHR9:%[0-9]+]]:_(s32) = G_LSHR [[AND8]], [[COPY16]](s32)
+    ; TAHITI: [[C12:%[0-9]+]]:_(s32) = G_CONSTANT i32 10
+    ; TAHITI: [[COPY18:%[0-9]+]]:_(s32) = COPY [[C12]](s32)
+    ; TAHITI: [[COPY19:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; TAHITI: [[AND9:%[0-9]+]]:_(s32) = G_AND [[COPY19]], [[C3]]
+    ; TAHITI: [[LSHR10:%[0-9]+]]:_(s32) = G_LSHR [[AND9]], [[COPY18]](s32)
+    ; TAHITI: [[C13:%[0-9]+]]:_(s32) = G_CONSTANT i32 11
+    ; TAHITI: [[COPY20:%[0-9]+]]:_(s32) = COPY [[C13]](s32)
+    ; TAHITI: [[COPY21:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; TAHITI: [[AND10:%[0-9]+]]:_(s32) = G_AND [[COPY21]], [[C3]]
+    ; TAHITI: [[LSHR11:%[0-9]+]]:_(s32) = G_LSHR [[AND10]], [[COPY20]](s32)
+    ; TAHITI: [[C14:%[0-9]+]]:_(s32) = G_CONSTANT i32 12
+    ; TAHITI: [[COPY22:%[0-9]+]]:_(s32) = COPY [[C14]](s32)
+    ; TAHITI: [[COPY23:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; TAHITI: [[AND11:%[0-9]+]]:_(s32) = G_AND [[COPY23]], [[C3]]
+    ; TAHITI: [[LSHR12:%[0-9]+]]:_(s32) = G_LSHR [[AND11]], [[COPY22]](s32)
+    ; TAHITI: [[C15:%[0-9]+]]:_(s32) = G_CONSTANT i32 13
+    ; TAHITI: [[COPY24:%[0-9]+]]:_(s32) = COPY [[C15]](s32)
+    ; TAHITI: [[COPY25:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; TAHITI: [[AND12:%[0-9]+]]:_(s32) = G_AND [[COPY25]], [[C3]]
+    ; TAHITI: [[LSHR13:%[0-9]+]]:_(s32) = G_LSHR [[AND12]], [[COPY24]](s32)
+    ; TAHITI: [[C16:%[0-9]+]]:_(s32) = G_CONSTANT i32 14
+    ; TAHITI: [[COPY26:%[0-9]+]]:_(s32) = COPY [[C16]](s32)
+    ; TAHITI: [[COPY27:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; TAHITI: [[AND13:%[0-9]+]]:_(s32) = G_AND [[COPY27]], [[C3]]
+    ; TAHITI: [[LSHR14:%[0-9]+]]:_(s32) = G_LSHR [[AND13]], [[COPY26]](s32)
+    ; TAHITI: [[C17:%[0-9]+]]:_(s32) = G_CONSTANT i32 15
+    ; TAHITI: [[COPY28:%[0-9]+]]:_(s32) = COPY [[C17]](s32)
+    ; TAHITI: [[COPY29:%[0-9]+]]:_(s32) = COPY [[UV]](s32)
+    ; TAHITI: [[AND14:%[0-9]+]]:_(s32) = G_AND [[COPY29]], [[C3]]
+    ; TAHITI: [[LSHR15:%[0-9]+]]:_(s32) = G_LSHR [[AND14]], [[COPY28]](s32)
+    ; TAHITI: [[COPY30:%[0-9]+]]:_(s32) = COPY [[C2]](s32)
+    ; TAHITI: [[COPY31:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; TAHITI: [[AND15:%[0-9]+]]:_(s32) = G_AND [[COPY31]], [[C3]]
+    ; TAHITI: [[LSHR16:%[0-9]+]]:_(s32) = G_LSHR [[AND15]], [[COPY30]](s32)
+    ; TAHITI: [[COPY32:%[0-9]+]]:_(s32) = COPY [[C4]](s32)
+    ; TAHITI: [[COPY33:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; TAHITI: [[AND16:%[0-9]+]]:_(s32) = G_AND [[COPY33]], [[C3]]
+    ; TAHITI: [[LSHR17:%[0-9]+]]:_(s32) = G_LSHR [[AND16]], [[COPY32]](s32)
+    ; TAHITI: [[COPY34:%[0-9]+]]:_(s32) = COPY [[C5]](s32)
+    ; TAHITI: [[COPY35:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; TAHITI: [[AND17:%[0-9]+]]:_(s32) = G_AND [[COPY35]], [[C3]]
+    ; TAHITI: [[LSHR18:%[0-9]+]]:_(s32) = G_LSHR [[AND17]], [[COPY34]](s32)
+    ; TAHITI: [[COPY36:%[0-9]+]]:_(s32) = COPY [[C6]](s32)
+    ; TAHITI: [[COPY37:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; TAHITI: [[AND18:%[0-9]+]]:_(s32) = G_AND [[COPY37]], [[C3]]
+    ; TAHITI: [[LSHR19:%[0-9]+]]:_(s32) = G_LSHR [[AND18]], [[COPY36]](s32)
+    ; TAHITI: [[COPY38:%[0-9]+]]:_(s32) = COPY [[C7]](s32)
+    ; TAHITI: [[COPY39:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; TAHITI: [[AND19:%[0-9]+]]:_(s32) = G_AND [[COPY39]], [[C3]]
+    ; TAHITI: [[LSHR20:%[0-9]+]]:_(s32) = G_LSHR [[AND19]], [[COPY38]](s32)
+    ; TAHITI: [[COPY40:%[0-9]+]]:_(s32) = COPY [[C8]](s32)
+    ; TAHITI: [[COPY41:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; TAHITI: [[AND20:%[0-9]+]]:_(s32) = G_AND [[COPY41]], [[C3]]
+    ; TAHITI: [[LSHR21:%[0-9]+]]:_(s32) = G_LSHR [[AND20]], [[COPY40]](s32)
+    ; TAHITI: [[COPY42:%[0-9]+]]:_(s32) = COPY [[C9]](s32)
+    ; TAHITI: [[COPY43:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; TAHITI: [[AND21:%[0-9]+]]:_(s32) = G_AND [[COPY43]], [[C3]]
+    ; TAHITI: [[LSHR22:%[0-9]+]]:_(s32) = G_LSHR [[AND21]], [[COPY42]](s32)
+    ; TAHITI: [[COPY44:%[0-9]+]]:_(s32) = COPY [[C10]](s32)
+    ; TAHITI: [[COPY45:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; TAHITI: [[AND22:%[0-9]+]]:_(s32) = G_AND [[COPY45]], [[C3]]
+    ; TAHITI: [[LSHR23:%[0-9]+]]:_(s32) = G_LSHR [[AND22]], [[COPY44]](s32)
+    ; TAHITI: [[COPY46:%[0-9]+]]:_(s32) = COPY [[C11]](s32)
+    ; TAHITI: [[COPY47:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; TAHITI: [[AND23:%[0-9]+]]:_(s32) = G_AND [[COPY47]], [[C3]]
+    ; TAHITI: [[LSHR24:%[0-9]+]]:_(s32) = G_LSHR [[AND23]], [[COPY46]](s32)
+    ; TAHITI: [[COPY48:%[0-9]+]]:_(s32) = COPY [[C12]](s32)
+    ; TAHITI: [[COPY49:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; TAHITI: [[AND24:%[0-9]+]]:_(s32) = G_AND [[COPY49]], [[C3]]
+    ; TAHITI: [[LSHR25:%[0-9]+]]:_(s32) = G_LSHR [[AND24]], [[COPY48]](s32)
+    ; TAHITI: [[COPY50:%[0-9]+]]:_(s32) = COPY [[C13]](s32)
+    ; TAHITI: [[COPY51:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; TAHITI: [[AND25:%[0-9]+]]:_(s32) = G_AND [[COPY51]], [[C3]]
+    ; TAHITI: [[LSHR26:%[0-9]+]]:_(s32) = G_LSHR [[AND25]], [[COPY50]](s32)
+    ; TAHITI: [[COPY52:%[0-9]+]]:_(s32) = COPY [[C14]](s32)
+    ; TAHITI: [[COPY53:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; TAHITI: [[AND26:%[0-9]+]]:_(s32) = G_AND [[COPY53]], [[C3]]
+    ; TAHITI: [[LSHR27:%[0-9]+]]:_(s32) = G_LSHR [[AND26]], [[COPY52]](s32)
+    ; TAHITI: [[COPY54:%[0-9]+]]:_(s32) = COPY [[C15]](s32)
+    ; TAHITI: [[COPY55:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; TAHITI: [[AND27:%[0-9]+]]:_(s32) = G_AND [[COPY55]], [[C3]]
+    ; TAHITI: [[LSHR28:%[0-9]+]]:_(s32) = G_LSHR [[AND27]], [[COPY54]](s32)
+    ; TAHITI: [[COPY56:%[0-9]+]]:_(s32) = COPY [[C16]](s32)
+    ; TAHITI: [[COPY57:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; TAHITI: [[AND28:%[0-9]+]]:_(s32) = G_AND [[COPY57]], [[C3]]
+    ; TAHITI: [[LSHR29:%[0-9]+]]:_(s32) = G_LSHR [[AND28]], [[COPY56]](s32)
+    ; TAHITI: [[COPY58:%[0-9]+]]:_(s32) = COPY [[C17]](s32)
+    ; TAHITI: [[COPY59:%[0-9]+]]:_(s32) = COPY [[LSHR]](s32)
+    ; TAHITI: [[AND29:%[0-9]+]]:_(s32) = G_AND [[COPY59]], [[C3]]
+    ; TAHITI: [[LSHR30:%[0-9]+]]:_(s32) = G_LSHR [[AND29]], [[COPY58]](s32)
+    ; TAHITI: [[DEF1:%[0-9]+]]:_(s64) = G_IMPLICIT_DEF
+    ; TAHITI: [[COPY60:%[0-9]+]]:_(s16) = COPY [[TRUNC]](s16)
+    ; TAHITI: [[AND30:%[0-9]+]]:_(s16) = G_AND [[COPY60]], [[C1]]
+    ; TAHITI: [[COPY61:%[0-9]+]]:_(s32) = COPY [[C2]](s32)
+    ; TAHITI: [[COPY62:%[0-9]+]]:_(s32) = COPY [[LSHR1]](s32)
+    ; TAHITI: [[AND31:%[0-9]+]]:_(s32) = G_AND [[COPY62]], [[C2]]
+    ; TAHITI: [[SHL:%[0-9]+]]:_(s32) = G_SHL [[AND31]], [[COPY61]](s32)
+    ; TAHITI: [[TRUNC2:%[0-9]+]]:_(s16) = G_TRUNC [[SHL]](s32)
+    ; TAHITI: [[OR:%[0-9]+]]:_(s16) = G_OR [[AND30]], [[TRUNC2]]
+    ; TAHITI: [[COPY63:%[0-9]+]]:_(s32) = COPY [[C4]](s32)
+    ; TAHITI: [[COPY64:%[0-9]+]]:_(s32) = COPY [[LSHR2]](s32)
+    ; TAHITI: [[AND32:%[0-9]+]]:_(s32) = G_AND [[COPY64]], [[C2]]
+    ; TAHITI: [[SHL1:%[0-9]+]]:_(s32) = G_SHL [[AND32]], [[COPY63]](s32)
+    ; TAHITI: [[TRUNC3:%[0-9]+]]:_(s16) = G_TRUNC [[SHL1]](s32)
+    ; TAHITI: [[OR1:%[0-9]+]]:_(s16) = G_OR [[OR]], [[TRUNC3]]
+    ; TAHITI: [[COPY65:%[0-9]+]]:_(s32) = COPY [[C5]](s32)
+    ; TAHITI: [[COPY66:%[0-9]+]]:_(s32) = COPY [[LSHR3]](s32)
+    ; TAHITI: [[AND33:%[0-9]+]]:_(s32) = G_AND [[COPY66]], [[C2]]
+    ; TAHITI: [[SHL2:%[0-9]+]]:_(s32) = G_SHL [[AND33]], [[COPY65]](s32)
+    ; TAHITI: [[TRUNC4:%[0-9]+]]:_(s16) = G_TRUNC [[SHL2]](s32)
+    ; TAHITI: [[OR2:%[0-9]+]]:_(s16) = G_OR [[OR1]], [[TRUNC4]]
+    ; TAHITI: [[COPY67:%[0-9]+]]:_(s32) = COPY [[C6]](s32)
+    ; TAHITI: [[COPY68:%[0-9]+]]:_(s32) = COPY [[LSHR4]](s32)
+    ; TAHITI: [[AND34:%[0-9]+]]:_(s32) = G_AND [[COPY68]], [[C2]]
+    ; TAHITI: [[SHL3:%[0-9]+]]:_(s32) = G_SHL [[AND34]], [[COPY67]](s32)
+    ; TAHITI: [[TRUNC5:%[0-9]+]]:_(s16) = G_TRUNC [[SHL3]](s32)
+    ; TAHITI: [[OR3:%[0-9]+]]:_(s16) = G_OR [[OR2]], [[TRUNC5]]
+    ; TAHITI: [[COPY69:%[0-9]+]]:_(s32) = COPY [[C7]](s32)
+    ; TAHITI: [[COPY70:%[0-9]+]]:_(s32) = COPY [[LSHR5]](s32)
+    ; TAHITI: [[AND35:%[0-9]+]]:_(s32) = G_AND [[COPY70]], [[C2]]
+    ; TAHITI: [[SHL4:%[0-9]+]]:_(s32) = G_SHL [[AND35]], [[COPY69]](s32)
+    ; TAHITI: [[TRUNC6:%[0-9]+]]:_(s16) = G_TRUNC [[SHL4]](s32)
+    ; TAHITI: [[OR4:%[0-9]+]]:_(s16) = G_OR [[OR3]], [[TRUNC6]]
+    ; TAHITI: [[COPY71:%[0-9]+]]:_(s32) = COPY [[C8]](s32)
+    ; TAHITI: [[COPY72:%[0-9]+]]:_(s32) = COPY [[LSHR6]](s32)
+    ; TAHITI: [[AND36:%[0-9]+]]:_(s32) = G_AND [[COPY72]], [[C2]]
+    ; TAHITI: [[SHL5:%[0-9]+]]:_(s32) = G_SHL [[AND36]], [[COPY71]](s32)
+    ; TAHITI: [[TRUNC7:%[0-9]+]]:_(s16) = G_TRUNC [[SHL5]](s32)
+    ; TAHITI: [[OR5:%[0-9]+]]:_(s16) = G_OR [[OR4]], [[TRUNC7]]
+    ; TAHITI: [[COPY73:%[0-9]+]]:_(s32) = COPY [[C9]](s32)
+    ; TAHITI: [[COPY74:%[0-9]+]]:_(s32) = COPY [[LSHR7]](s32)
+    ; TAHITI: [[AND37:%[0-9]+]]:_(s32) = G_AND [[COPY74]], [[C2]]
+    ; TAHITI: [[SHL6:%[0-9]+]]:_(s32) = G_SHL [[AND37]], [[COPY73]](s32)
+    ; TAHITI: [[TRUNC8:%[0-9]+]]:_(s16) = G_TRUNC [[SHL6]](s32)
+    ; TAHITI: [[OR6:%[0-9]+]]:_(s16) = G_OR [[OR5]], [[TRUNC8]]
+    ; TAHITI: [[COPY75:%[0-9]+]]:_(s32) = COPY [[C10]](s32)
+    ; TAHITI: [[COPY76:%[0-9]+]]:_(s32) = COPY [[LSHR8]](s32)
+    ; TAHITI: [[AND38:%[0-9]+]]:_(s32) = G_AND [[COPY76]], [[C2]]
+    ; TAHITI: [[SHL7:%[0-9]+]]:_(s32) = G_SHL [[AND38]], [[COPY75]](s32)
+    ; TAHITI: [[TRUNC9:%[0-9]+]]:_(s16) = G_TRUNC [[SHL7]](s32)
+    ; TAHITI: [[OR7:%[0-9]+]]:_(s16) = G_OR [[OR6]], [[TRUNC9]]
+    ; TAHITI: [[COPY77:%[0-9]+]]:_(s32) = COPY [[C11]](s32)
+    ; TAHITI: [[COPY78:%[0-9]+]]:_(s32) = COPY [[LSHR9]](s32)
+    ; TAHITI: [[AND39:%[0-9]+]]:_(s32) = G_AND [[COPY78]], [[C2]]
+    ; TAHITI: [[SHL8:%[0-9]+]]:_(s32) = G_SHL [[AND39]], [[COPY77]](s32)
+    ; TAHITI: [[TRUNC10:%[0-9]+]]:_(s16) = G_TRUNC [[SHL8]](s32)
+    ; TAHITI: [[OR8:%[0-9]+]]:_(s16) = G_OR [[OR7]], [[TRUNC10]]
+    ; TAHITI: [[COPY79:%[0-9]+]]:_(s32) = COPY [[C12]](s32)
+    ; TAHITI: [[COPY80:%[0-9]+]]:_(s32) = COPY [[LSHR10]](s32)
+    ; TAHITI: [[AND40:%[0-9]+]]:_(s32) = G_AND [[COPY80]], [[C2]]
+    ; TAHITI: [[SHL9:%[0-9]+]]:_(s32) = G_SHL [[AND40]], [[COPY79]](s32)
+    ; TAHITI: [[TRUNC11:%[0-9]+]]:_(s16) = G_TRUNC [[SHL9]](s32)
+    ; TAHITI: [[OR9:%[0-9]+]]:_(s16) = G_OR [[OR8]], [[TRUNC11]]
+    ; TAHITI: [[COPY81:%[0-9]+]]:_(s32) = COPY [[C13]](s32)
+    ; TAHITI: [[COPY82:%[0-9]+]]:_(s32) = COPY [[LSHR11]](s32)
+    ; TAHITI: [[AND41:%[0-9]+]]:_(s32) = G_AND [[COPY82]], [[C2]]
+    ; TAHITI: [[SHL10:%[0-9]+]]:_(s32) = G_SHL [[AND41]], [[COPY81]](s32)
+    ; TAHITI: [[TRUNC12:%[0-9]+]]:_(s16) = G_TRUNC [[SHL10]](s32)
+    ; TAHITI: [[OR10:%[0-9]+]]:_(s16) = G_OR [[OR9]], [[TRUNC12]]
+    ; TAHITI: [[COPY83:%[0-9]+]]:_(s32) = COPY [[C14]](s32)
+    ; TAHITI: [[COPY84:%[0-9]+]]:_(s32) = COPY [[LSHR12]](s32)
+    ; TAHITI: [[AND42:%[0-9]+]]:_(s32) = G_AND [[COPY84]], [[C2]]
+    ; TAHITI: [[SHL11:%[0-9]+]]:_(s32) = G_SHL [[AND42]], [[COPY83]](s32)
+    ; TAHITI: [[TRUNC13:%[0-9]+]]:_(s16) = G_TRUNC [[SHL11]](s32)
+    ; TAHITI: [[OR11:%[0-9]+]]:_(s16) = G_OR [[OR10]], [[TRUNC13]]
+    ; TAHITI: [[COPY85:%[0-9]+]]:_(s32) = COPY [[C15]](s32)
+    ; TAHITI: [[COPY86:%[0-9]+]]:_(s32) = COPY [[LSHR13]](s32)
+    ; TAHITI: [[AND43:%[0-9]+]]:_(s32) = G_AND [[COPY86]], [[C2]]
+    ; TAHITI: [[SHL12:%[0-9]+]]:_(s32) = G_SHL [[AND43]], [[COPY85]](s32)
+    ; TAHITI: [[TRUNC14:%[0-9]+]]:_(s16) = G_TRUNC [[SHL12]](s32)
+    ; TAHITI: [[OR12:%[0-9]+]]:_(s16) = G_OR [[OR11]], [[TRUNC14]]
+    ; TAHITI: [[COPY87:%[0-9]+]]:_(s32) = COPY [[C16]](s32)
+    ; TAHITI: [[COPY88:%[0-9]+]]:_(s32) = COPY [[LSHR14]](s32)
+    ; TAHITI: [[AND44:%[0-9]+]]:_(s32) = G_AND [[COPY88]], [[C2]]
+    ; TAHITI: [[SHL13:%[0-9]+]]:_(s32) = G_SHL [[AND44]], [[COPY87]](s32)
+    ; TAHITI: [[TRUNC15:%[0-9]+]]:_(s16) = G_TRUNC [[SHL13]](s32)
+    ; TAHITI: [[OR13:%[0-9]+]]:_(s16) = G_OR [[OR12]], [[TRUNC15]]
+    ; TAHITI: [[COPY89:%[0-9]+]]:_(s32) = COPY [[C17]](s32)
+    ; TAHITI: [[COPY90:%[0-9]+]]:_(s32) = COPY [[LSHR15]](s32)
+    ; TAHITI: [[AND45:%[0-9]+]]:_(s32) = G_AND [[COPY90]], [[C2]]
+    ; TAHITI: [[SHL14:%[0-9]+]]:_(s32) = G_SHL [[AND45]], [[COPY89]](s32)
+    ; TAHITI: [[TRUNC16:%[0-9]+]]:_(s16) = G_TRUNC [[SHL14]](s32)
+    ; TAHITI: [[OR14:%[0-9]+]]:_(s16) = G_OR [[OR13]], [[TRUNC16]]
+    ; TAHITI: [[COPY91:%[0-9]+]]:_(s16) = COPY [[TRUNC1]](s16)
+    ; TAHITI: [[AND46:%[0-9]+]]:_(s16) = G_AND [[COPY91]], [[C1]]
+    ; TAHITI: [[COPY92:%[0-9]+]]:_(s32) = COPY [[C2]](s32)
+    ; TAHITI: [[COPY93:%[0-9]+]]:_(s32) = COPY [[LSHR16]](s32)
+    ; TAHITI: [[AND47:%[0-9]+]]:_(s32) = G_AND [[COPY93]], [[C2]]
+    ; TAHITI: [[SHL15:%[0-9]+]]:_(s32) = G_SHL [[AND47]], [[COPY92]](s32)
+    ; TAHITI: [[TRUNC17:%[0-9]+]]:_(s16) = G_TRUNC [[SHL15]](s32)
+    ; TAHITI: [[OR15:%[0-9]+]]:_(s16) = G_OR [[AND46]], [[TRUNC17]]
+    ; TAHITI: [[COPY94:%[0-9]+]]:_(s32) = COPY [[LSHR17]](s32)
+    ; TAHITI: [[AND48:%[0-9]+]]:_(s32) = G_AND [[COPY94]], [[C2]]
+    ; TAHITI: [[SHL16:%[0-9]+]]:_(s32) = G_SHL [[AND48]], [[C4]](s32)
+    ; TAHITI: [[TRUNC18:%[0-9]+]]:_(s16) = G_TRUNC [[SHL16]](s32)
+    ; TAHITI: [[OR16:%[0-9]+]]:_(s16) = G_OR [[OR15]], [[TRUNC18]]
+    ; TAHITI: [[COPY95:%[0-9]+]]:_(s32) = COPY [[LSHR18]](s32)
+    ; TAHITI: [[AND49:%[0-9]+]]:_(s32) = G_AND [[COPY95]], [[C2]]
+    ; TAHITI: [[SHL17:%[0-9]+]]:_(s32) = G_SHL [[AND49]], [[C5]](s32)
+    ; TAHITI: [[TRUNC19:%[0-9]+]]:_(s16) = G_TRUNC [[SHL17]](s32)
+    ; TAHITI: [[OR17:%[0-9]+]]:_(s16) = G_OR [[OR16]], [[TRUNC19]]
+    ; TAHITI: [[COPY96:%[0-9]+]]:_(s32) = COPY [[LSHR19]](s32)
+    ; TAHITI: [[AND50:%[0-9]+]]:_(s32) = G_AND [[COPY96]], [[C2]]
+    ; TAHITI: [[SHL18:%[0-9]+]]:_(s32) = G_SHL [[AND50]], [[C6]](s32)
+    ; TAHITI: [[TRUNC20:%[0-9]+]]:_(s16) = G_TRUNC [[SHL18]](s32)
+    ; TAHITI: [[OR18:%[0-9]+]]:_(s16) = G_OR [[OR17]], [[TRUNC20]]
+    ; TAHITI: [[COPY97:%[0-9]+]]:_(s32) = COPY [[LSHR20]](s32)
+    ; TAHITI: [[AND51:%[0-9]+]]:_(s32) = G_AND [[COPY97]], [[C2]]
+    ; TAHITI: [[SHL19:%[0-9]+]]:_(s32) = G_SHL [[AND51]], [[C7]](s32)
+    ; TAHITI: [[TRUNC21:%[0-9]+]]:_(s16) = G_TRUNC [[SHL19]](s32)
+    ; TAHITI: [[OR19:%[0-9]+]]:_(s16) = G_OR [[OR18]], [[TRUNC21]]
+    ; TAHITI: [[COPY98:%[0-9]+]]:_(s32) = COPY [[LSHR21]](s32)
+    ; TAHITI: [[AND52:%[0-9]+]]:_(s32) = G_AND [[COPY98]], [[C2]]
+    ; TAHITI: [[SHL20:%[0-9]+]]:_(s32) = G_SHL [[AND52]], [[C8]](s32)
+    ; TAHITI: [[TRUNC22:%[0-9]+]]:_(s16) = G_TRUNC [[SHL20]](s32)
+    ; TAHITI: [[OR20:%[0-9]+]]:_(s16) = G_OR [[OR19]], [[TRUNC22]]
+    ; TAHITI: [[COPY99:%[0-9]+]]:_(s32) = COPY [[LSHR22]](s32)
+    ; TAHITI: [[AND53:%[0-9]+]]:_(s32) = G_AND [[COPY99]], [[C2]]
+    ; TAHITI: [[SHL21:%[0-9]+]]:_(s32) = G_SHL [[AND53]], [[C9]](s32)
+    ; TAHITI: [[TRUNC23:%[0-9]+]]:_(s16) = G_TRUNC [[SHL21]](s32)
+    ; TAHITI: [[OR21:%[0-9]+]]:_(s16) = G_OR [[OR20]], [[TRUNC23]]
+    ; TAHITI: [[COPY100:%[0-9]+]]:_(s32) = COPY [[LSHR23]](s32)
+    ; TAHITI: [[AND54:%[0-9]+]]:_(s32) = G_AND [[COPY100]], [[C2]]
+    ; TAHITI: [[SHL22:%[0-9]+]]:_(s32) = G_SHL [[AND54]], [[C10]](s32)
+    ; TAHITI: [[TRUNC24:%[0-9]+]]:_(s16) = G_TRUNC [[SHL22]](s32)
+    ; TAHITI: [[OR22:%[0-9]+]]:_(s16) = G_OR [[OR21]], [[TRUNC24]]
+    ; TAHITI: [[COPY101:%[0-9]+]]:_(s32) = COPY [[LSHR24]](s32)
+    ; TAHITI: [[AND55:%[0-9]+]]:_(s32) = G_AND [[COPY101]], [[C2]]
+    ; TAHITI: [[SHL23:%[0-9]+]]:_(s32) = G_SHL [[AND55]], [[C11]](s32)
+    ; TAHITI: [[TRUNC25:%[0-9]+]]:_(s16) = G_TRUNC [[SHL23]](s32)
+    ; TAHITI: [[OR23:%[0-9]+]]:_(s16) = G_OR [[OR22]], [[TRUNC25]]
+    ; TAHITI: [[COPY102:%[0-9]+]]:_(s32) = COPY [[LSHR25]](s32)
+    ; TAHITI: [[AND56:%[0-9]+]]:_(s32) = G_AND [[COPY102]], [[C2]]
+    ; TAHITI: [[SHL24:%[0-9]+]]:_(s32) = G_SHL [[AND56]], [[C12]](s32)
+    ; TAHITI: [[TRUNC26:%[0-9]+]]:_(s16) = G_TRUNC [[SHL24]](s32)
+    ; TAHITI: [[OR24:%[0-9]+]]:_(s16) = G_OR [[OR23]], [[TRUNC26]]
+    ; TAHITI: [[COPY103:%[0-9]+]]:_(s32) = COPY [[LSHR26]](s32)
+    ; TAHITI: [[AND57:%[0-9]+]]:_(s32) = G_AND [[COPY103]], [[C2]]
+    ; TAHITI: [[SHL25:%[0-9]+]]:_(s32) = G_SHL [[AND57]], [[C13]](s32)
+    ; TAHITI: [[TRUNC27:%[0-9]+]]:_(s16) = G_TRUNC [[SHL25]](s32)
+    ; TAHITI: [[OR25:%[0-9]+]]:_(s16) = G_OR [[OR24]], [[TRUNC27]]
+    ; TAHITI: [[COPY104:%[0-9]+]]:_(s32) = COPY [[LSHR27]](s32)
+    ; TAHITI: [[AND58:%[0-9]+]]:_(s32) = G_AND [[COPY104]], [[C2]]
+    ; TAHITI: [[SHL26:%[0-9]+]]:_(s32) = G_SHL [[AND58]], [[C14]](s32)
+    ; TAHITI: [[TRUNC28:%[0-9]+]]:_(s16) = G_TRUNC [[SHL26]](s32)
+    ; TAHITI: [[OR26:%[0-9]+]]:_(s16) = G_OR [[OR25]], [[TRUNC28]]
+    ; TAHITI: [[COPY105:%[0-9]+]]:_(s32) = COPY [[LSHR28]](s32)
+    ; TAHITI: [[AND59:%[0-9]+]]:_(s32) = G_AND [[COPY105]], [[C2]]
+    ; TAHITI: [[SHL27:%[0-9]+]]:_(s32) = G_SHL [[AND59]], [[C15]](s32)
+    ; TAHITI: [[TRUNC29:%[0-9]+]]:_(s16) = G_TRUNC [[SHL27]](s32)
+    ; TAHITI: [[OR27:%[0-9]+]]:_(s16) = G_OR [[OR26]], [[TRUNC29]]
+    ; TAHITI: [[COPY106:%[0-9]+]]:_(s32) = COPY [[LSHR29]](s32)
+    ; TAHITI: [[AND60:%[0-9]+]]:_(s32) = G_AND [[COPY106]], [[C2]]
+    ; TAHITI: [[SHL28:%[0-9]+]]:_(s32) = G_SHL [[AND60]], [[C16]](s32)
+    ; TAHITI: [[TRUNC30:%[0-9]+]]:_(s16) = G_TRUNC [[SHL28]](s32)
+    ; TAHITI: [[OR28:%[0-9]+]]:_(s16) = G_OR [[OR27]], [[TRUNC30]]
+    ; TAHITI: [[COPY107:%[0-9]+]]:_(s32) = COPY [[LSHR30]](s32)
+    ; TAHITI: [[AND61:%[0-9]+]]:_(s32) = G_AND [[COPY107]], [[C2]]
+    ; TAHITI: [[SHL29:%[0-9]+]]:_(s32) = G_SHL [[AND61]], [[C17]](s32)
+    ; TAHITI: [[TRUNC31:%[0-9]+]]:_(s16) = G_TRUNC [[SHL29]](s32)
+    ; TAHITI: [[OR29:%[0-9]+]]:_(s16) = G_OR [[OR28]], [[TRUNC31]]
+    ; TAHITI: [[ZEXT:%[0-9]+]]:_(s32) = G_ZEXT [[OR14]](s16)
+    ; TAHITI: [[ZEXT1:%[0-9]+]]:_(s32) = G_ZEXT [[OR29]](s16)
+    ; TAHITI: [[SHL30:%[0-9]+]]:_(s32) = G_SHL [[ZEXT1]], [[C]](s32)
+    ; TAHITI: [[OR30:%[0-9]+]]:_(s32) = G_OR [[ZEXT]], [[SHL30]]
+    ; TAHITI: $vgpr0 = COPY [[OR30]](s32)
+    ; FIJI-LABEL: name: test_implicit_def_s1025
+    ; FIJI: [[DEF:%[0-9]+]]:_(s1024) = G_IMPLICIT_DEF
+    ; FIJI: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32), [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32), [[UV4:%[0-9]+]]:_(s32), [[UV5:%[0-9]+]]:_(s32), [[UV6:%[0-9]+]]:_(s32), [[UV7:%[0-9]+]]:_(s32), [[UV8:%[0-9]+]]:_(s32), [[UV9:%[0-9]+]]:_(s32), [[UV10:%[0-9]+]]:_(s32), [[UV11:%[0-9]+]]:_(s32), [[UV12:%[0-9]+]]:_(s32), [[UV13:%[0-9]+]]:_(s32), [[UV14:%[0-9]+]]:_(s32), [[UV15:%[0-9]+]]:_(s32), [[UV16:%[0-9]+]]:_(s32), [[UV17:%[0-9]+]]:_(s32), [[UV18:%[0-9]+]]:_(s32), [[UV19:%[0-9]+]]:_(s32), [[UV20:%[0-9]+]]:_(s32), [[UV21:%[0-9]+]]:_(s32), [[UV22:%[0-9]+]]:_(s32), [[UV23:%[0-9]+]]:_(s32), [[UV24:%[0-9]+]]:_(s32), [[UV25:%[0-9]+]]:_(s32), [[UV26:%[0-9]+]]:_(s32), [[UV27:%[0-9]+]]:_(s32), [[UV28:%[0-9]+]]:_(s32), [[UV29:%[0-9]+]]:_(s32), [[UV30:%[0-9]+]]:_(s32), [[UV31:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[DEF]](s1024)
+    ; FIJI: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[UV]](s32)
+    ; FIJI: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
+    ; FIJI: [[LSHR:%[0-9]+]]:_(s32) = G_LSHR [[UV]], [[C]](s32)
+    ; FIJI: [[TRUNC1:%[0-9]+]]:_(s16) = G_TRUNC [[LSHR]](s32)
+    ; FIJI: [[C1:%[0-9]+]]:_(s16) = G_CONSTANT i16 1
+    ; FIJI: [[LSHR1:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC]], [[C1]](s16)
+    ; FIJI: [[C2:%[0-9]+]]:_(s16) = G_CONSTANT i16 2
+    ; FIJI: [[LSHR2:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC]], [[C2]](s16)
+    ; FIJI: [[C3:%[0-9]+]]:_(s16) = G_CONSTANT i16 3
+    ; FIJI: [[LSHR3:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC]], [[C3]](s16)
+    ; FIJI: [[C4:%[0-9]+]]:_(s16) = G_CONSTANT i16 4
+    ; FIJI: [[LSHR4:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC]], [[C4]](s16)
+    ; FIJI: [[C5:%[0-9]+]]:_(s16) = G_CONSTANT i16 5
+    ; FIJI: [[LSHR5:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC]], [[C5]](s16)
+    ; FIJI: [[C6:%[0-9]+]]:_(s16) = G_CONSTANT i16 6
+    ; FIJI: [[LSHR6:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC]], [[C6]](s16)
+    ; FIJI: [[C7:%[0-9]+]]:_(s16) = G_CONSTANT i16 7
+    ; FIJI: [[LSHR7:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC]], [[C7]](s16)
+    ; FIJI: [[C8:%[0-9]+]]:_(s16) = G_CONSTANT i16 8
+    ; FIJI: [[LSHR8:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC]], [[C8]](s16)
+    ; FIJI: [[C9:%[0-9]+]]:_(s16) = G_CONSTANT i16 9
+    ; FIJI: [[LSHR9:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC]], [[C9]](s16)
+    ; FIJI: [[C10:%[0-9]+]]:_(s16) = G_CONSTANT i16 10
+    ; FIJI: [[LSHR10:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC]], [[C10]](s16)
+    ; FIJI: [[C11:%[0-9]+]]:_(s16) = G_CONSTANT i16 11
+    ; FIJI: [[LSHR11:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC]], [[C11]](s16)
+    ; FIJI: [[C12:%[0-9]+]]:_(s16) = G_CONSTANT i16 12
+    ; FIJI: [[LSHR12:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC]], [[C12]](s16)
+    ; FIJI: [[C13:%[0-9]+]]:_(s16) = G_CONSTANT i16 13
+    ; FIJI: [[LSHR13:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC]], [[C13]](s16)
+    ; FIJI: [[C14:%[0-9]+]]:_(s16) = G_CONSTANT i16 14
+    ; FIJI: [[LSHR14:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC]], [[C14]](s16)
+    ; FIJI: [[C15:%[0-9]+]]:_(s16) = G_CONSTANT i16 15
+    ; FIJI: [[LSHR15:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC]], [[C15]](s16)
+    ; FIJI: [[LSHR16:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC1]], [[C1]](s16)
+    ; FIJI: [[LSHR17:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC1]], [[C2]](s16)
+    ; FIJI: [[LSHR18:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC1]], [[C3]](s16)
+    ; FIJI: [[LSHR19:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC1]], [[C4]](s16)
+    ; FIJI: [[LSHR20:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC1]], [[C5]](s16)
+    ; FIJI: [[LSHR21:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC1]], [[C6]](s16)
+    ; FIJI: [[LSHR22:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC1]], [[C7]](s16)
+    ; FIJI: [[LSHR23:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC1]], [[C8]](s16)
+    ; FIJI: [[LSHR24:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC1]], [[C9]](s16)
+    ; FIJI: [[LSHR25:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC1]], [[C10]](s16)
+    ; FIJI: [[LSHR26:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC1]], [[C11]](s16)
+    ; FIJI: [[LSHR27:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC1]], [[C12]](s16)
+    ; FIJI: [[LSHR28:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC1]], [[C13]](s16)
+    ; FIJI: [[LSHR29:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC1]], [[C14]](s16)
+    ; FIJI: [[LSHR30:%[0-9]+]]:_(s16) = G_LSHR [[TRUNC1]], [[C15]](s16)
+    ; FIJI: [[DEF1:%[0-9]+]]:_(s64) = G_IMPLICIT_DEF
+    ; FIJI: [[COPY:%[0-9]+]]:_(s16) = COPY [[TRUNC]](s16)
+    ; FIJI: [[AND:%[0-9]+]]:_(s16) = G_AND [[COPY]], [[C1]]
+    ; FIJI: [[COPY1:%[0-9]+]]:_(s16) = COPY [[LSHR1]](s16)
+    ; FIJI: [[AND1:%[0-9]+]]:_(s16) = G_AND [[COPY1]], [[C1]]
+    ; FIJI: [[SHL:%[0-9]+]]:_(s16) = G_SHL [[AND1]], [[C1]](s16)
+    ; FIJI: [[OR:%[0-9]+]]:_(s16) = G_OR [[AND]], [[SHL]]
+    ; FIJI: [[COPY2:%[0-9]+]]:_(s16) = COPY [[LSHR2]](s16)
+    ; FIJI: [[AND2:%[0-9]+]]:_(s16) = G_AND [[COPY2]], [[C1]]
+    ; FIJI: [[SHL1:%[0-9]+]]:_(s16) = G_SHL [[AND2]], [[C2]](s16)
+    ; FIJI: [[OR1:%[0-9]+]]:_(s16) = G_OR [[OR]], [[SHL1]]
+    ; FIJI: [[COPY3:%[0-9]+]]:_(s16) = COPY [[LSHR3]](s16)
+    ; FIJI: [[AND3:%[0-9]+]]:_(s16) = G_AND [[COPY3]], [[C1]]
+    ; FIJI: [[SHL2:%[0-9]+]]:_(s16) = G_SHL [[AND3]], [[C3]](s16)
+    ; FIJI: [[OR2:%[0-9]+]]:_(s16) = G_OR [[OR1]], [[SHL2]]
+    ; FIJI: [[COPY4:%[0-9]+]]:_(s16) = COPY [[LSHR4]](s16)
+    ; FIJI: [[AND4:%[0-9]+]]:_(s16) = G_AND [[COPY4]], [[C1]]
+    ; FIJI: [[SHL3:%[0-9]+]]:_(s16) = G_SHL [[AND4]], [[C4]](s16)
+    ; FIJI: [[OR3:%[0-9]+]]:_(s16) = G_OR [[OR2]], [[SHL3]]
+    ; FIJI: [[COPY5:%[0-9]+]]:_(s16) = COPY [[LSHR5]](s16)
+    ; FIJI: [[AND5:%[0-9]+]]:_(s16) = G_AND [[COPY5]], [[C1]]
+    ; FIJI: [[SHL4:%[0-9]+]]:_(s16) = G_SHL [[AND5]], [[C5]](s16)
+    ; FIJI: [[OR4:%[0-9]+]]:_(s16) = G_OR [[OR3]], [[SHL4]]
+    ; FIJI: [[COPY6:%[0-9]+]]:_(s16) = COPY [[LSHR6]](s16)
+    ; FIJI: [[AND6:%[0-9]+]]:_(s16) = G_AND [[COPY6]], [[C1]]
+    ; FIJI: [[SHL5:%[0-9]+]]:_(s16) = G_SHL [[AND6]], [[C6]](s16)
+    ; FIJI: [[OR5:%[0-9]+]]:_(s16) = G_OR [[OR4]], [[SHL5]]
+    ; FIJI: [[COPY7:%[0-9]+]]:_(s16) = COPY [[LSHR7]](s16)
+    ; FIJI: [[AND7:%[0-9]+]]:_(s16) = G_AND [[COPY7]], [[C1]]
+    ; FIJI: [[SHL6:%[0-9]+]]:_(s16) = G_SHL [[AND7]], [[C7]](s16)
+    ; FIJI: [[OR6:%[0-9]+]]:_(s16) = G_OR [[OR5]], [[SHL6]]
+    ; FIJI: [[COPY8:%[0-9]+]]:_(s16) = COPY [[LSHR8]](s16)
+    ; FIJI: [[AND8:%[0-9]+]]:_(s16) = G_AND [[COPY8]], [[C1]]
+    ; FIJI: [[SHL7:%[0-9]+]]:_(s16) = G_SHL [[AND8]], [[C8]](s16)
+    ; FIJI: [[OR7:%[0-9]+]]:_(s16) = G_OR [[OR6]], [[SHL7]]
+    ; FIJI: [[COPY9:%[0-9]+]]:_(s16) = COPY [[LSHR9]](s16)
+    ; FIJI: [[AND9:%[0-9]+]]:_(s16) = G_AND [[COPY9]], [[C1]]
+    ; FIJI: [[SHL8:%[0-9]+]]:_(s16) = G_SHL [[AND9]], [[C9]](s16)
+    ; FIJI: [[OR8:%[0-9]+]]:_(s16) = G_OR [[OR7]], [[SHL8]]
+    ; FIJI: [[COPY10:%[0-9]+]]:_(s16) = COPY [[LSHR10]](s16)
+    ; FIJI: [[AND10:%[0-9]+]]:_(s16) = G_AND [[COPY10]], [[C1]]
+    ; FIJI: [[SHL9:%[0-9]+]]:_(s16) = G_SHL [[AND10]], [[C10]](s16)
+    ; FIJI: [[OR9:%[0-9]+]]:_(s16) = G_OR [[OR8]], [[SHL9]]
+    ; FIJI: [[COPY11:%[0-9]+]]:_(s16) = COPY [[LSHR11]](s16)
+    ; FIJI: [[AND11:%[0-9]+]]:_(s16) = G_AND [[COPY11]], [[C1]]
+    ; FIJI: [[SHL10:%[0-9]+]]:_(s16) = G_SHL [[AND11]], [[C11]](s16)
+    ; FIJI: [[OR10:%[0-9]+]]:_(s16) = G_OR [[OR9]], [[SHL10]]
+    ; FIJI: [[COPY12:%[0-9]+]]:_(s16) = COPY [[LSHR12]](s16)
+    ; FIJI: [[AND12:%[0-9]+]]:_(s16) = G_AND [[COPY12]], [[C1]]
+    ; FIJI: [[SHL11:%[0-9]+]]:_(s16) = G_SHL [[AND12]], [[C12]](s16)
+    ; FIJI: [[OR11:%[0-9]+]]:_(s16) = G_OR [[OR10]], [[SHL11]]
+    ; FIJI: [[COPY13:%[0-9]+]]:_(s16) = COPY [[LSHR13]](s16)
+    ; FIJI: [[AND13:%[0-9]+]]:_(s16) = G_AND [[COPY13]], [[C1]]
+    ; FIJI: [[SHL12:%[0-9]+]]:_(s16) = G_SHL [[AND13]], [[C13]](s16)
+    ; FIJI: [[OR12:%[0-9]+]]:_(s16) = G_OR [[OR11]], [[SHL12]]
+    ; FIJI: [[COPY14:%[0-9]+]]:_(s16) = COPY [[LSHR14]](s16)
+    ; FIJI: [[AND14:%[0-9]+]]:_(s16) = G_AND [[COPY14]], [[C1]]
+    ; FIJI: [[SHL13:%[0-9]+]]:_(s16) = G_SHL [[AND14]], [[C14]](s16)
+    ; FIJI: [[OR13:%[0-9]+]]:_(s16) = G_OR [[OR12]], [[SHL13]]
+    ; FIJI: [[COPY15:%[0-9]+]]:_(s16) = COPY [[LSHR15]](s16)
+    ; FIJI: [[AND15:%[0-9]+]]:_(s16) = G_AND [[COPY15]], [[C1]]
+    ; FIJI: [[SHL14:%[0-9]+]]:_(s16) = G_SHL [[AND15]], [[C15]](s16)
+    ; FIJI: [[OR14:%[0-9]+]]:_(s16) = G_OR [[OR13]], [[SHL14]]
+    ; FIJI: [[COPY16:%[0-9]+]]:_(s16) = COPY [[TRUNC1]](s16)
+    ; FIJI: [[AND16:%[0-9]+]]:_(s16) = G_AND [[COPY16]], [[C1]]
+    ; FIJI: [[COPY17:%[0-9]+]]:_(s16) = COPY [[LSHR16]](s16)
+    ; FIJI: [[AND17:%[0-9]+]]:_(s16) = G_AND [[COPY17]], [[C1]]
+    ; FIJI: [[SHL15:%[0-9]+]]:_(s16) = G_SHL [[AND17]], [[C1]](s16)
+    ; FIJI: [[OR15:%[0-9]+]]:_(s16) = G_OR [[AND16]], [[SHL15]]
+    ; FIJI: [[COPY18:%[0-9]+]]:_(s16) = COPY [[LSHR17]](s16)
+    ; FIJI: [[AND18:%[0-9]+]]:_(s16) = G_AND [[COPY18]], [[C1]]
+    ; FIJI: [[SHL16:%[0-9]+]]:_(s16) = G_SHL [[AND18]], [[C2]](s16)
+    ; FIJI: [[OR16:%[0-9]+]]:_(s16) = G_OR [[OR15]], [[SHL16]]
+    ; FIJI: [[COPY19:%[0-9]+]]:_(s16) = COPY [[LSHR18]](s16)
+    ; FIJI: [[AND19:%[0-9]+]]:_(s16) = G_AND [[COPY19]], [[C1]]
+    ; FIJI: [[SHL17:%[0-9]+]]:_(s16) = G_SHL [[AND19]], [[C3]](s16)
+    ; FIJI: [[OR17:%[0-9]+]]:_(s16) = G_OR [[OR16]], [[SHL17]]
+    ; FIJI: [[COPY20:%[0-9]+]]:_(s16) = COPY [[LSHR19]](s16)
+    ; FIJI: [[AND20:%[0-9]+]]:_(s16) = G_AND [[COPY20]], [[C1]]
+    ; FIJI: [[SHL18:%[0-9]+]]:_(s16) = G_SHL [[AND20]], [[C4]](s16)
+    ; FIJI: [[OR18:%[0-9]+]]:_(s16) = G_OR [[OR17]], [[SHL18]]
+    ; FIJI: [[COPY21:%[0-9]+]]:_(s16) = COPY [[LSHR20]](s16)
+    ; FIJI: [[AND21:%[0-9]+]]:_(s16) = G_AND [[COPY21]], [[C1]]
+    ; FIJI: [[SHL19:%[0-9]+]]:_(s16) = G_SHL [[AND21]], [[C5]](s16)
+    ; FIJI: [[OR19:%[0-9]+]]:_(s16) = G_OR [[OR18]], [[SHL19]]
+    ; FIJI: [[COPY22:%[0-9]+]]:_(s16) = COPY [[LSHR21]](s16)
+    ; FIJI: [[AND22:%[0-9]+]]:_(s16) = G_AND [[COPY22]], [[C1]]
+    ; FIJI: [[SHL20:%[0-9]+]]:_(s16) = G_SHL [[AND22]], [[C6]](s16)
+    ; FIJI: [[OR20:%[0-9]+]]:_(s16) = G_OR [[OR19]], [[SHL20]]
+    ; FIJI: [[COPY23:%[0-9]+]]:_(s16) = COPY [[LSHR22]](s16)
+    ; FIJI: [[AND23:%[0-9]+]]:_(s16) = G_AND [[COPY23]], [[C1]]
+    ; FIJI: [[SHL21:%[0-9]+]]:_(s16) = G_SHL [[AND23]], [[C7]](s16)
+    ; FIJI: [[OR21:%[0-9]+]]:_(s16) = G_OR [[OR20]], [[SHL21]]
+    ; FIJI: [[COPY24:%[0-9]+]]:_(s16) = COPY [[LSHR23]](s16)
+    ; FIJI: [[AND24:%[0-9]+]]:_(s16) = G_AND [[COPY24]], [[C1]]
+    ; FIJI: [[SHL22:%[0-9]+]]:_(s16) = G_SHL [[AND24]], [[C8]](s16)
+    ; FIJI: [[OR22:%[0-9]+]]:_(s16) = G_OR [[OR21]], [[SHL22]]
+    ; FIJI: [[COPY25:%[0-9]+]]:_(s16) = COPY [[LSHR24]](s16)
+    ; FIJI: [[AND25:%[0-9]+]]:_(s16) = G_AND [[COPY25]], [[C1]]
+    ; FIJI: [[SHL23:%[0-9]+]]:_(s16) = G_SHL [[AND25]], [[C9]](s16)
+    ; FIJI: [[OR23:%[0-9]+]]:_(s16) = G_OR [[OR22]], [[SHL23]]
+    ; FIJI: [[COPY26:%[0-9]+]]:_(s16) = COPY [[LSHR25]](s16)
+    ; FIJI: [[AND26:%[0-9]+]]:_(s16) = G_AND [[COPY26]], [[C1]]
+    ; FIJI: [[SHL24:%[0-9]+]]:_(s16) = G_SHL [[AND26]], [[C10]](s16)
+    ; FIJI: [[OR24:%[0-9]+]]:_(s16) = G_OR [[OR23]], [[SHL24]]
+    ; FIJI: [[COPY27:%[0-9]+]]:_(s16) = COPY [[LSHR26]](s16)
+    ; FIJI: [[AND27:%[0-9]+]]:_(s16) = G_AND [[COPY27]], [[C1]]
+    ; FIJI: [[SHL25:%[0-9]+]]:_(s16) = G_SHL [[AND27]], [[C11]](s16)
+    ; FIJI: [[OR25:%[0-9]+]]:_(s16) = G_OR [[OR24]], [[SHL25]]
+    ; FIJI: [[COPY28:%[0-9]+]]:_(s16) = COPY [[LSHR27]](s16)
+    ; FIJI: [[AND28:%[0-9]+]]:_(s16) = G_AND [[COPY28]], [[C1]]
+    ; FIJI: [[SHL26:%[0-9]+]]:_(s16) = G_SHL [[AND28]], [[C12]](s16)
+    ; FIJI: [[OR26:%[0-9]+]]:_(s16) = G_OR [[OR25]], [[SHL26]]
+    ; FIJI: [[COPY29:%[0-9]+]]:_(s16) = COPY [[LSHR28]](s16)
+    ; FIJI: [[AND29:%[0-9]+]]:_(s16) = G_AND [[COPY29]], [[C1]]
+    ; FIJI: [[SHL27:%[0-9]+]]:_(s16) = G_SHL [[AND29]], [[C13]](s16)
+    ; FIJI: [[OR27:%[0-9]+]]:_(s16) = G_OR [[OR26]], [[SHL27]]
+    ; FIJI: [[COPY30:%[0-9]+]]:_(s16) = COPY [[LSHR29]](s16)
+    ; FIJI: [[AND30:%[0-9]+]]:_(s16) = G_AND [[COPY30]], [[C1]]
+    ; FIJI: [[SHL28:%[0-9]+]]:_(s16) = G_SHL [[AND30]], [[C14]](s16)
+    ; FIJI: [[OR28:%[0-9]+]]:_(s16) = G_OR [[OR27]], [[SHL28]]
+    ; FIJI: [[COPY31:%[0-9]+]]:_(s16) = COPY [[LSHR30]](s16)
+    ; FIJI: [[AND31:%[0-9]+]]:_(s16) = G_AND [[COPY31]], [[C1]]
+    ; FIJI: [[SHL29:%[0-9]+]]:_(s16) = G_SHL [[AND31]], [[C15]](s16)
+    ; FIJI: [[OR29:%[0-9]+]]:_(s16) = G_OR [[OR28]], [[SHL29]]
+    ; FIJI: [[ZEXT:%[0-9]+]]:_(s32) = G_ZEXT [[OR14]](s16)
+    ; FIJI: [[ZEXT1:%[0-9]+]]:_(s32) = G_ZEXT [[OR29]](s16)
+    ; FIJI: [[SHL30:%[0-9]+]]:_(s32) = G_SHL [[ZEXT1]], [[C]](s32)
+    ; FIJI: [[OR30:%[0-9]+]]:_(s32) = G_OR [[ZEXT]], [[SHL30]]
+    ; FIJI: $vgpr0 = COPY [[OR30]](s32)
     %0:_(s1025) = G_IMPLICIT_DEF
     %1:_(s32) = G_TRUNC %0
     $vgpr0 = COPY %1
diff --git a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-implicit-def.mir b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-implicit-def.mir
--- a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-implicit-def.mir
+++ b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-implicit-def.mir
@@ -182,27 +182,8 @@
     ; CHECK-LABEL: name: test_implicit_def_s1056
     ; CHECK: [[DEF:%[0-9]+]]:_(s1024) = G_IMPLICIT_DEF
     ; CHECK: [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32), [[UV2:%[0-9]+]]:_(s32), [[UV3:%[0-9]+]]:_(s32), [[UV4:%[0-9]+]]:_(s32), [[UV5:%[0-9]+]]:_(s32), [[UV6:%[0-9]+]]:_(s32), [[UV7:%[0-9]+]]:_(s32), [[UV8:%[0-9]+]]:_(s32), [[UV9:%[0-9]+]]:_(s32), [[UV10:%[0-9]+]]:_(s32), [[UV11:%[0-9]+]]:_(s32), [[UV12:%[0-9]+]]:_(s32), [[UV13:%[0-9]+]]:_(s32), [[UV14:%[0-9]+]]:_(s32), [[UV15:%[0-9]+]]:_(s32), [[UV16:%[0-9]+]]:_(s32), [[UV17:%[0-9]+]]:_(s32), [[UV18:%[0-9]+]]:_(s32), [[UV19:%[0-9]+]]:_(s32), [[UV20:%[0-9]+]]:_(s32), [[UV21:%[0-9]+]]:_(s32), [[UV22:%[0-9]+]]:_(s32), [[UV23:%[0-9]+]]:_(s32), [[UV24:%[0-9]+]]:_(s32), [[UV25:%[0-9]+]]:_(s32), [[UV26:%[0-9]+]]:_(s32), [[UV27:%[0-9]+]]:_(s32), [[UV28:%[0-9]+]]:_(s32), [[UV29:%[0-9]+]]:_(s32), [[UV30:%[0-9]+]]:_(s32), [[UV31:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[DEF]](s1024)
-    ; CHECK: [[MV:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV]](s32), [[UV1]](s32)
-    ; CHECK: [[MV1:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV2]](s32), [[UV3]](s32)
-    ; CHECK: [[MV2:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV4]](s32), [[UV5]](s32)
-    ; CHECK: [[MV3:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV6]](s32), [[UV7]](s32)
-    ; CHECK: [[MV4:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV8]](s32), [[UV9]](s32)
-    ; CHECK: [[MV5:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV10]](s32), [[UV11]](s32)
-    ; CHECK: [[MV6:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV12]](s32), [[UV13]](s32)
-    ; CHECK: [[MV7:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV14]](s32), [[UV15]](s32)
-    ; CHECK: [[MV8:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV16]](s32), [[UV17]](s32)
-    ; CHECK: [[MV9:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV18]](s32), [[UV19]](s32)
-    ; CHECK: [[MV10:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV20]](s32), [[UV21]](s32)
-    ; CHECK: [[MV11:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV22]](s32), [[UV23]](s32)
-    ; CHECK: [[MV12:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV24]](s32), [[UV25]](s32)
-    ; CHECK: [[MV13:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV26]](s32), [[UV27]](s32)
-    ; CHECK: [[MV14:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV28]](s32), [[UV29]](s32)
-    ; CHECK: [[MV15:%[0-9]+]]:_(s64) = G_MERGE_VALUES [[UV30]](s32), [[UV31]](s32)
     ; CHECK: [[DEF1:%[0-9]+]]:_(s64) = G_IMPLICIT_DEF
-    ; CHECK: [[MV16:%[0-9]+]]:_(s2112) = G_MERGE_VALUES [[MV]](s64), [[MV1]](s64), [[MV2]](s64), [[MV3]](s64), [[MV4]](s64), [[MV5]](s64), [[MV6]](s64), [[MV7]](s64), [[MV8]](s64), [[MV9]](s64), [[MV10]](s64), [[MV11]](s64), [[MV12]](s64), [[MV13]](s64), [[MV14]](s64), [[MV15]](s64), [[DEF1]](s64), [[DEF1]](s64), [[DEF1]](s64), [[DEF1]](s64), [[DEF1]](s64), [[DEF1]](s64), [[DEF1]](s64), [[DEF1]](s64), [[DEF1]](s64), [[DEF1]](s64), [[DEF1]](s64), [[DEF1]](s64), [[DEF1]](s64), [[DEF1]](s64), [[DEF1]](s64), [[DEF1]](s64), [[DEF1]](s64)
-    ; CHECK: [[TRUNC:%[0-9]+]]:_(s1056) = G_TRUNC [[MV16]](s2112)
-    ; CHECK: [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[TRUNC]](s1056)
-    ; CHECK: $vgpr0 = COPY [[TRUNC1]](s32)
+    ; CHECK: $vgpr0 = COPY [[UV]](s32)
     %0:_(s1056) = G_IMPLICIT_DEF
     %1:_(s32) = G_TRUNC %0
     $vgpr0 = COPY %1
diff --git a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-inttoptr.mir b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-inttoptr.mir
--- a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-inttoptr.mir
+++ b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-inttoptr.mir
@@ -188,9 +188,8 @@
 
     ; CHECK-LABEL: name: test_inttoptr_s33_to_p3
     ; CHECK: [[COPY:%[0-9]+]]:_(s64) = COPY $vgpr0_vgpr1
-    ; CHECK: [[TRUNC:%[0-9]+]]:_(s33) = G_TRUNC [[COPY]](s64)
-    ; CHECK: [[TRUNC1:%[0-9]+]]:_(s32) = G_TRUNC [[TRUNC]](s33)
-    ; CHECK: [[INTTOPTR:%[0-9]+]]:_(p3) = G_INTTOPTR [[TRUNC1]](s32)
+    ; CHECK: [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
+    ; CHECK: [[INTTOPTR:%[0-9]+]]:_(p3) = G_INTTOPTR [[TRUNC]](s32)
     ; CHECK: S_ENDPGM 0, implicit [[INTTOPTR]](p3)
     %0:_(s64) = COPY $vgpr0_vgpr1
     %1:_(s33) = G_TRUNC %0
diff --git a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-trunc.mir b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-trunc.mir
--- a/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-trunc.mir
+++ b/llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-trunc.mir
@@ -215,9 +215,8 @@
 
     ; CHECK-LABEL: name: test_trunc_s16_to_s1
     ; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
-    ; CHECK: [[TRUNC:%[0-9]+]]:_(s16) = G_TRUNC [[COPY]](s32)
-    ; CHECK: [[TRUNC1:%[0-9]+]]:_(s1) = G_TRUNC [[TRUNC]](s16)
-    ; CHECK: S_ENDPGM 0, implicit [[TRUNC1]](s1)
+    ; CHECK: [[TRUNC:%[0-9]+]]:_(s1) = G_TRUNC [[COPY]](s32)
+    ; CHECK: S_ENDPGM 0, implicit [[TRUNC]](s1)
     %0:_(s32) = COPY $vgpr0
     %1:_(s16) = G_TRUNC %0
     %2:_(s1) = G_TRUNC %1