llvm/test/CodeGen/AMDGPU/GlobalISel/combine-shl-from-extend-narrow.postlegal.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=tahiti -run-pass=amdgpu-postlegalizer-combiner -verify-machineinstrs %s -o - | FileCheck -check-prefix=GFX6  %s
# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx900 -run-pass=amdgpu-postlegalizer-combiner -verify-machineinstrs %s -o - | FileCheck -check-prefix=GFX9  %s

# Can't narrow this; need known bits
---
name: shl_s64_by_2_from_anyext_s32
tracksRegLiveness: true
legalized: true
body:             |
  bb.0:
    liveins: $vgpr0

    ; GFX6-LABEL: name: shl_s64_by_2_from_anyext_s32
    ; GFX6: liveins: $vgpr0
    ; GFX6-NEXT: {{  $}}
    ; GFX6-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
    ; GFX6-NEXT: [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[COPY]](s32)
    ; GFX6-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
    ; GFX6-NEXT: [[SHL:%[0-9]+]]:_(s64) = G_SHL [[ANYEXT]], [[C]](s32)
    ; GFX6-NEXT: $vgpr0_vgpr1 = COPY [[SHL]](s64)
    ;
    ; GFX9-LABEL: name: shl_s64_by_2_from_anyext_s32
    ; GFX9: liveins: $vgpr0
    ; GFX9-NEXT: {{  $}}
    ; GFX9-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
    ; GFX9-NEXT: [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[COPY]](s32)
    ; GFX9-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
    ; GFX9-NEXT: [[SHL:%[0-9]+]]:_(s64) = G_SHL [[ANYEXT]], [[C]](s32)
    ; GFX9-NEXT: $vgpr0_vgpr1 = COPY [[SHL]](s64)
    %0:_(s32) = COPY $vgpr0
    %1:_(s64) = G_ANYEXT %0
    %2:_(s32) = G_CONSTANT i32 2
    %3:_(s64) = G_SHL %1, %2
    $vgpr0_vgpr1 = COPY %3
...

# Can't narrow this; need known bits
---
name: shl_s64_by_2_from_sext_s32
tracksRegLiveness: true
legalized: true
body:             |
  bb.0:
    liveins: $vgpr0

    ; GFX6-LABEL: name: shl_s64_by_2_from_sext_s32
    ; GFX6: liveins: $vgpr0
    ; GFX6-NEXT: {{  $}}
    ; GFX6-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
    ; GFX6-NEXT: [[SEXT:%[0-9]+]]:_(s64) = G_SEXT [[COPY]](s32)
    ; GFX6-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
    ; GFX6-NEXT: [[SHL:%[0-9]+]]:_(s64) = G_SHL [[SEXT]], [[C]](s32)
    ; GFX6-NEXT: $vgpr0_vgpr1 = COPY [[SHL]](s64)
    ;
    ; GFX9-LABEL: name: shl_s64_by_2_from_sext_s32
    ; GFX9: liveins: $vgpr0
    ; GFX9-NEXT: {{  $}}
    ; GFX9-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
    ; GFX9-NEXT: [[SEXT:%[0-9]+]]:_(s64) = G_SEXT [[COPY]](s32)
    ; GFX9-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
    ; GFX9-NEXT: [[SHL:%[0-9]+]]:_(s64) = G_SHL [[SEXT]], [[C]](s32)
    ; GFX9-NEXT: $vgpr0_vgpr1 = COPY [[SHL]](s64)
    %0:_(s32) = COPY $vgpr0
    %1:_(s64) = G_SEXT %0
    %2:_(s32) = G_CONSTANT i32 2
    %3:_(s64) = G_SHL %1, %2
    $vgpr0_vgpr1 = COPY %3
...

# Can't narrow this; need known bits
---
name: shl_s64_by_2_from_zext_s32
tracksRegLiveness: true
legalized: true
body:             |
  bb.0:
    liveins: $vgpr0

    ; GFX6-LABEL: name: shl_s64_by_2_from_zext_s32
    ; GFX6: liveins: $vgpr0
    ; GFX6-NEXT: {{  $}}
    ; GFX6-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
    ; GFX6-NEXT: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[COPY]](s32)
    ; GFX6-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
    ; GFX6-NEXT: [[SHL:%[0-9]+]]:_(s64) = G_SHL [[ZEXT]], [[C]](s32)
    ; GFX6-NEXT: $vgpr0_vgpr1 = COPY [[SHL]](s64)
    ;
    ; GFX9-LABEL: name: shl_s64_by_2_from_zext_s32
    ; GFX9: liveins: $vgpr0
    ; GFX9-NEXT: {{  $}}
    ; GFX9-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
    ; GFX9-NEXT: [[ZEXT:%[0-9]+]]:_(s64) = G_ZEXT [[COPY]](s32)
    ; GFX9-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
    ; GFX9-NEXT: [[SHL:%[0-9]+]]:_(s64) = G_SHL [[ZEXT]], [[C]](s32)
    ; GFX9-NEXT: $vgpr0_vgpr1 = COPY [[SHL]](s64)
    %0:_(s32) = COPY $vgpr0
    %1:_(s64) = G_ZEXT %0
    %2:_(s32) = G_CONSTANT i32 2
    %3:_(s64) = G_SHL %1, %2
    $vgpr0_vgpr1 = COPY %3
...

---
name: narrow_shl_s64_by_2_from_anyext_s32
tracksRegLiveness: true
legalized: true
body:             |
  bb.0:
    liveins: $vgpr0

    ; GFX6-LABEL: name: narrow_shl_s64_by_2_from_anyext_s32
    ; GFX6: liveins: $vgpr0
    ; GFX6-NEXT: {{  $}}
    ; GFX6-NEXT: %narrow:_(s32) = COPY $vgpr0
    ; GFX6-NEXT: %masklow30:_(s32) = G_CONSTANT i32 1073741823
    ; GFX6-NEXT: %masked:_(s32) = G_AND %narrow, %masklow30
    ; GFX6-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
    ; GFX6-NEXT: [[SHL:%[0-9]+]]:_(s32) = G_SHL %masked, [[C]](s32)
    ; GFX6-NEXT: %shl:_(s64) = G_ZEXT [[SHL]](s32)
    ; GFX6-NEXT: $vgpr0_vgpr1 = COPY %shl(s64)
    ;
    ; GFX9-LABEL: name: narrow_shl_s64_by_2_from_anyext_s32
    ; GFX9: liveins: $vgpr0
    ; GFX9-NEXT: {{  $}}
    ; GFX9-NEXT: %narrow:_(s32) = COPY $vgpr0
    ; GFX9-NEXT: %masklow30:_(s32) = G_CONSTANT i32 1073741823
    ; GFX9-NEXT: %masked:_(s32) = G_AND %narrow, %masklow30
    ; GFX9-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
    ; GFX9-NEXT: [[SHL:%[0-9]+]]:_(s32) = G_SHL %masked, [[C]](s32)
    ; GFX9-NEXT: %shl:_(s64) = G_ZEXT [[SHL]](s32)
    ; GFX9-NEXT: $vgpr0_vgpr1 = COPY %shl(s64)
    %narrow:_(s32) = COPY $vgpr0
    %masklow30:_(s32) = G_CONSTANT i32 1073741823
    %masked:_(s32) = G_AND %narrow, %masklow30
    %extend:_(s64) = G_ANYEXT %masked
    %shiftamt:_(s32) = G_CONSTANT i32 2
    %shl:_(s64) = G_SHL %extend, %shiftamt
    $vgpr0_vgpr1 = COPY %shl
...

---
name: narrow_shl_s64_by_2_from_zext_s32
tracksRegLiveness: true
legalized: true
body:             |
  bb.0:
    liveins: $vgpr0

    ; GFX6-LABEL: name: narrow_shl_s64_by_2_from_zext_s32
    ; GFX6: liveins: $vgpr0
    ; GFX6-NEXT: {{  $}}
    ; GFX6-NEXT: %narrow:_(s32) = COPY $vgpr0
    ; GFX6-NEXT: %masklow30:_(s32) = G_CONSTANT i32 1073741823
    ; GFX6-NEXT: %masked:_(s32) = G_AND %narrow, %masklow30
    ; GFX6-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
    ; GFX6-NEXT: [[SHL:%[0-9]+]]:_(s32) = G_SHL %masked, [[C]](s32)
    ; GFX6-NEXT: %shl:_(s64) = G_ZEXT [[SHL]](s32)
    ; GFX6-NEXT: $vgpr0_vgpr1 = COPY %shl(s64)
    ;
    ; GFX9-LABEL: name: narrow_shl_s64_by_2_from_zext_s32
    ; GFX9: liveins: $vgpr0
    ; GFX9-NEXT: {{  $}}
    ; GFX9-NEXT: %narrow:_(s32) = COPY $vgpr0
    ; GFX9-NEXT: %masklow30:_(s32) = G_CONSTANT i32 1073741823
    ; GFX9-NEXT: %masked:_(s32) = G_AND %narrow, %masklow30
    ; GFX9-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
    ; GFX9-NEXT: [[SHL:%[0-9]+]]:_(s32) = G_SHL %masked, [[C]](s32)
    ; GFX9-NEXT: %shl:_(s64) = G_ZEXT [[SHL]](s32)
    ; GFX9-NEXT: $vgpr0_vgpr1 = COPY %shl(s64)
    %narrow:_(s32) = COPY $vgpr0
    %masklow30:_(s32) = G_CONSTANT i32 1073741823
    %masked:_(s32) = G_AND %narrow, %masklow30
    %extend:_(s64) = G_ZEXT %masked
    %shiftamt:_(s32) = G_CONSTANT i32 2
    %shl:_(s64) = G_SHL %extend, %shiftamt
    $vgpr0_vgpr1 = COPY %shl
...

---
name: narrow_shl_s64_by_2_from_sext_s32
tracksRegLiveness: true
legalized: true
body:             |
  bb.0:
    liveins: $vgpr0

    ; GFX6-LABEL: name: narrow_shl_s64_by_2_from_sext_s32
    ; GFX6: liveins: $vgpr0
    ; GFX6-NEXT: {{  $}}
    ; GFX6-NEXT: %narrow:_(s32) = COPY $vgpr0
    ; GFX6-NEXT: %masklow30:_(s32) = G_CONSTANT i32 1073741823
    ; GFX6-NEXT: %masked:_(s32) = G_AND %narrow, %masklow30
    ; GFX6-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
    ; GFX6-NEXT: [[SHL:%[0-9]+]]:_(s32) = G_SHL %masked, [[C]](s32)
    ; GFX6-NEXT: %shl:_(s64) = G_ZEXT [[SHL]](s32)
    ; GFX6-NEXT: $vgpr0_vgpr1 = COPY %shl(s64)
    ;
    ; GFX9-LABEL: name: narrow_shl_s64_by_2_from_sext_s32
    ; GFX9: liveins: $vgpr0
    ; GFX9-NEXT: {{  $}}
    ; GFX9-NEXT: %narrow:_(s32) = COPY $vgpr0
    ; GFX9-NEXT: %masklow30:_(s32) = G_CONSTANT i32 1073741823
    ; GFX9-NEXT: %masked:_(s32) = G_AND %narrow, %masklow30
    ; GFX9-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
    ; GFX9-NEXT: [[SHL:%[0-9]+]]:_(s32) = G_SHL %masked, [[C]](s32)
    ; GFX9-NEXT: %shl:_(s64) = G_ZEXT [[SHL]](s32)
    ; GFX9-NEXT: $vgpr0_vgpr1 = COPY %shl(s64)
    %narrow:_(s32) = COPY $vgpr0
    %masklow30:_(s32) = G_CONSTANT i32 1073741823
    %masked:_(s32) = G_AND %narrow, %masklow30
    %extend:_(s64) = G_SEXT %masked
    %shiftamt:_(s32) = G_CONSTANT i32 2
    %shl:_(s64) = G_SHL %extend, %shiftamt
    $vgpr0_vgpr1 = COPY %shl
...

---
name: narrow_shl_s64_by_2_from_zext_s32_lookthrough_amount
tracksRegLiveness: true
legalized: true
body:             |
  bb.0:
    liveins: $vgpr0

    ; GFX6-LABEL: name: narrow_shl_s64_by_2_from_zext_s32_lookthrough_amount
    ; GFX6: liveins: $vgpr0
    ; GFX6-NEXT: {{  $}}
    ; GFX6-NEXT: %narrow:_(s32) = COPY $vgpr0
    ; GFX6-NEXT: %masklow30:_(s32) = G_CONSTANT i32 1073741823
    ; GFX6-NEXT: %masked:_(s32) = G_AND %narrow, %masklow30
    ; GFX6-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
    ; GFX6-NEXT: [[SHL:%[0-9]+]]:_(s32) = G_SHL %masked, [[C]](s32)
    ; GFX6-NEXT: %shl:_(s64) = G_ZEXT [[SHL]](s32)
    ; GFX6-NEXT: $vgpr0_vgpr1 = COPY %shl(s64)
    ;
    ; GFX9-LABEL: name: narrow_shl_s64_by_2_from_zext_s32_lookthrough_amount
    ; GFX9: liveins: $vgpr0
    ; GFX9-NEXT: {{  $}}
    ; GFX9-NEXT: %narrow:_(s32) = COPY $vgpr0
    ; GFX9-NEXT: %masklow30:_(s32) = G_CONSTANT i32 1073741823
    ; GFX9-NEXT: %masked:_(s32) = G_AND %narrow, %masklow30
    ; GFX9-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
    ; GFX9-NEXT: [[SHL:%[0-9]+]]:_(s32) = G_SHL %masked, [[C]](s32)
    ; GFX9-NEXT: %shl:_(s64) = G_ZEXT [[SHL]](s32)
    ; GFX9-NEXT: $vgpr0_vgpr1 = COPY %shl(s64)
    %narrow:_(s32) = COPY $vgpr0
    %masklow30:_(s32) = G_CONSTANT i32 1073741823
    %masked:_(s32) = G_AND %narrow, %masklow30
    %extend:_(s64) = G_ZEXT %masked
    %shiftamt64:_(s64) = G_CONSTANT i64 2
    %shiftamt:_(s32) = G_TRUNC %shiftamt64
    %shl:_(s64) = G_SHL %extend, %shiftamt
    $vgpr0_vgpr1 = COPY %shl
...

# Can't introduce a 16-bit shift before gfx8
---
name: narrow_shl_s32_by_2_from_zext_s16
tracksRegLiveness: true
legalized: true
body:             |
  bb.0:
    liveins: $vgpr0

    ; GFX6-LABEL: name: narrow_shl_s32_by_2_from_zext_s16
    ; GFX6: liveins: $vgpr0
    ; GFX6-NEXT: {{  $}}
    ; GFX6-NEXT: %argument:_(s32) = COPY $vgpr0
    ; GFX6-NEXT: %narrow:_(s16) = G_TRUNC %argument(s32)
    ; GFX6-NEXT: %masklow14:_(s16) = G_CONSTANT i16 16383
    ; GFX6-NEXT: %masked:_(s16) = G_AND %narrow, %masklow14
    ; GFX6-NEXT: %extend:_(s32) = G_ZEXT %masked(s16)
    ; GFX6-NEXT: %shiftamt:_(s32) = G_CONSTANT i32 2
    ; GFX6-NEXT: %shl:_(s32) = G_SHL %extend, %shiftamt(s32)
    ; GFX6-NEXT: $vgpr0 = COPY %shl(s32)
    ;
    ; GFX9-LABEL: name: narrow_shl_s32_by_2_from_zext_s16
    ; GFX9: liveins: $vgpr0
    ; GFX9-NEXT: {{  $}}
    ; GFX9-NEXT: %argument:_(s32) = COPY $vgpr0
    ; GFX9-NEXT: %narrow:_(s16) = G_TRUNC %argument(s32)
    ; GFX9-NEXT: %masklow14:_(s16) = G_CONSTANT i16 16383
    ; GFX9-NEXT: %masked:_(s16) = G_AND %narrow, %masklow14
    ; GFX9-NEXT: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 2
    ; GFX9-NEXT: [[SHL:%[0-9]+]]:_(s16) = G_SHL %masked, [[C]](s16)
    ; GFX9-NEXT: %shl:_(s32) = G_ZEXT [[SHL]](s16)
    ; GFX9-NEXT: $vgpr0 = COPY %shl(s32)
    %argument:_(s32) = COPY $vgpr0
    %narrow:_(s16) = G_TRUNC %argument
    %masklow14:_(s16) = G_CONSTANT i16 16383
    %masked:_(s16) = G_AND %narrow, %masklow14
    %extend:_(s32) = G_ZEXT %masked
    %shiftamt:_(s32) = G_CONSTANT i32 2
    %shl:_(s32) = G_SHL %extend, %shiftamt
    $vgpr0 = COPY %shl
...

---
name: narrow_shl_s64_by_2_from_zext_s16
tracksRegLiveness: true
legalized: true
body:             |
  bb.0:
    liveins: $vgpr0

    ; GFX6-LABEL: name: narrow_shl_s64_by_2_from_zext_s16
    ; GFX6: liveins: $vgpr0
    ; GFX6-NEXT: {{  $}}
    ; GFX6-NEXT: %argument:_(s32) = COPY $vgpr0
    ; GFX6-NEXT: %narrow:_(s16) = G_TRUNC %argument(s32)
    ; GFX6-NEXT: %masklow14:_(s16) = G_CONSTANT i16 16383
    ; GFX6-NEXT: %masked:_(s16) = G_AND %narrow, %masklow14
    ; GFX6-NEXT: %extend:_(s64) = G_ZEXT %masked(s16)
    ; GFX6-NEXT: %shiftamt:_(s32) = G_CONSTANT i32 2
    ; GFX6-NEXT: %shl:_(s64) = G_SHL %extend, %shiftamt(s32)
    ; GFX6-NEXT: $vgpr0_vgpr1 = COPY %shl(s64)
    ;
    ; GFX9-LABEL: name: narrow_shl_s64_by_2_from_zext_s16
    ; GFX9: liveins: $vgpr0
    ; GFX9-NEXT: {{  $}}
    ; GFX9-NEXT: %argument:_(s32) = COPY $vgpr0
    ; GFX9-NEXT: %narrow:_(s16) = G_TRUNC %argument(s32)
    ; GFX9-NEXT: %masklow14:_(s16) = G_CONSTANT i16 16383
    ; GFX9-NEXT: %masked:_(s16) = G_AND %narrow, %masklow14
    ; GFX9-NEXT: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 2
    ; GFX9-NEXT: [[SHL:%[0-9]+]]:_(s16) = G_SHL %masked, [[C]](s16)
    ; GFX9-NEXT: %shl:_(s64) = G_ZEXT [[SHL]](s16)
    ; GFX9-NEXT: $vgpr0_vgpr1 = COPY %shl(s64)
    %argument:_(s32) = COPY $vgpr0
    %narrow:_(s16) = G_TRUNC %argument
    %masklow14:_(s16) = G_CONSTANT i16 16383
    %masked:_(s16) = G_AND %narrow, %masklow14
    %extend:_(s64) = G_ZEXT %masked
    %shiftamt:_(s32) = G_CONSTANT i32 2
    %shl:_(s64) = G_SHL %extend, %shiftamt
    $vgpr0_vgpr1 = COPY %shl
...

---
name: do_not_shl_s32_zero_by_16_from_zext_s16
tracksRegLiveness: true
legalized: true

body:             |
  bb.0:
    liveins: $vgpr0
    ; GFX6-LABEL: name: do_not_shl_s32_zero_by_16_from_zext_s16
    ; GFX6: liveins: $vgpr0
    ; GFX6-NEXT: {{  $}}
    ; GFX6-NEXT: %extend:_(s32) = G_CONSTANT i32 0
    ; GFX6-NEXT: $vgpr0 = COPY %extend(s32)
    ;
    ; GFX9-LABEL: name: do_not_shl_s32_zero_by_16_from_zext_s16
    ; GFX9: liveins: $vgpr0
    ; GFX9-NEXT: {{  $}}
    ; GFX9-NEXT: %extend:_(s32) = G_CONSTANT i32 0
    ; GFX9-NEXT: $vgpr0 = COPY %extend(s32)
    %zero:_(s16) = G_CONSTANT i16 0
    %extend:_(s32) = G_ZEXT %zero:_(s16)
    %shiftamt:_(s16) = G_CONSTANT i16 16
    %shl:_(s32) = G_SHL %extend, %shiftamt(s16)
    $vgpr0 = COPY %shl
...

---
name: do_not_shl_v2s32_zero_by_16_from_zext_v2s16
tracksRegLiveness: true
legalized: true

body:             |
  bb.0:
    liveins: $vgpr0
    ; GFX6-LABEL: name: do_not_shl_v2s32_zero_by_16_from_zext_v2s16
    ; GFX6: liveins: $vgpr0
    ; GFX6-NEXT: {{  $}}
    ; GFX6-NEXT: %6:_(s32) = G_CONSTANT i32 0
    ; GFX6-NEXT: %shl:_(<2 x s32>) = G_BUILD_VECTOR %6(s32), %6(s32)
    ; GFX6-NEXT: $vgpr0_vgpr1 = COPY %shl(<2 x s32>)
    ;
    ; GFX9-LABEL: name: do_not_shl_v2s32_zero_by_16_from_zext_v2s16
    ; GFX9: liveins: $vgpr0
    ; GFX9-NEXT: {{  $}}
    ; GFX9-NEXT: %6:_(s32) = G_CONSTANT i32 0
    ; GFX9-NEXT: %shl:_(<2 x s32>) = G_BUILD_VECTOR %6(s32), %6(s32)
    ; GFX9-NEXT: $vgpr0_vgpr1 = COPY %shl(<2 x s32>)
    %zero:_(s16) = G_CONSTANT i16 0
    %zerovector:_(<2 x s16>) = G_BUILD_VECTOR %zero, %zero:_(s16)
    %shiftamt:_(s16) = G_CONSTANT i16 16
    %shiftamtvector:_(<2 x s16>) = G_BUILD_VECTOR %shiftamt, %shiftamt:_(s16)
    %extend:_(<2 x s32>) = G_ZEXT %zerovector:_(<2 x s16>)
    %shl:_(<2 x s32>) = G_SHL %extend, %shiftamtvector
    $vgpr0_vgpr1 = COPY %shl
...

---
name: do_not_shl_s32_by_16_from_zext_s16
tracksRegLiveness: true
legalized: true

body:             |
  bb.0:
    liveins: $vgpr0
    ; GFX6-LABEL: name: do_not_shl_s32_by_16_from_zext_s16
    ; GFX6: liveins: $vgpr0
    ; GFX6-NEXT: {{  $}}
    ; GFX6-NEXT: %argument:_(s32) = COPY $vgpr0
    ; GFX6-NEXT: %truncate:_(s16) = G_TRUNC %argument(s32)
    ; GFX6-NEXT: %shiftamt:_(s16) = G_CONSTANT i16 16
    ; GFX6-NEXT: %extend:_(s32) = G_ZEXT %truncate(s16)
    ; GFX6-NEXT: %shl:_(s32) = G_SHL %extend, %shiftamt(s16)
    ; GFX6-NEXT: $vgpr0 = COPY %shl(s32)
    ;
    ; GFX9-LABEL: name: do_not_shl_s32_by_16_from_zext_s16
    ; GFX9: liveins: $vgpr0
    ; GFX9-NEXT: {{  $}}
    ; GFX9-NEXT: %argument:_(s32) = COPY $vgpr0
    ; GFX9-NEXT: %truncate:_(s16) = G_TRUNC %argument(s32)
    ; GFX9-NEXT: %shiftamt:_(s16) = G_CONSTANT i16 16
    ; GFX9-NEXT: %extend:_(s32) = G_ZEXT %truncate(s16)
    ; GFX9-NEXT: %shl:_(s32) = G_SHL %extend, %shiftamt(s16)
    ; GFX9-NEXT: $vgpr0 = COPY %shl(s32)
    %argument:_(s32) = COPY $vgpr0
    %truncate:_(s16) = G_TRUNC %argument:_(s32)
    %shiftamt:_(s16) = G_CONSTANT i16 16
    %extend:_(s32) = G_ZEXT %truncate:_(s16)
    %shl:_(s32) = G_SHL %extend, %shiftamt(s16)
    $vgpr0 = COPY %shl
...