# 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: %shl:_(s32) = G_CONSTANT i32 0
; GFX6-NEXT: $vgpr0 = COPY %shl(s32)
;
; GFX9-LABEL: name: do_not_shl_s32_zero_by_16_from_zext_s16
; GFX9: liveins: $vgpr0
; GFX9-NEXT: {{ $}}
; GFX9-NEXT: %shl:_(s32) = G_CONSTANT i32 0
; GFX9-NEXT: $vgpr0 = COPY %shl(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: %zero:_(s16) = G_CONSTANT i16 0
; GFX6-NEXT: %zerovector:_(<2 x s16>) = G_BUILD_VECTOR %zero(s16), %zero(s16)
; GFX6-NEXT: %shiftamt:_(s16) = G_CONSTANT i16 16
; GFX6-NEXT: %shiftamtvector:_(<2 x s16>) = G_BUILD_VECTOR %shiftamt(s16), %shiftamt(s16)
; GFX6-NEXT: %extend:_(<2 x s32>) = G_ZEXT %zerovector(<2 x s16>)
; GFX6-NEXT: %shl:_(<2 x s32>) = G_SHL %extend, %shiftamtvector(<2 x s16>)
; 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: %zero:_(s16) = G_CONSTANT i16 0
; GFX9-NEXT: %zerovector:_(<2 x s16>) = G_BUILD_VECTOR %zero(s16), %zero(s16)
; GFX9-NEXT: %shiftamt:_(s16) = G_CONSTANT i16 16
; GFX9-NEXT: %shiftamtvector:_(<2 x s16>) = G_BUILD_VECTOR %shiftamt(s16), %shiftamt(s16)
; GFX9-NEXT: %extend:_(<2 x s32>) = G_ZEXT %zerovector(<2 x s16>)
; GFX9-NEXT: %shl:_(<2 x s32>) = G_SHL %extend, %shiftamtvector(<2 x s16>)
; 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
...
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