src/llvm-project/llvm/test/CodeGen/AMDGPU/GlobalISel/combine-shl-from-extend-narrow.prelegal.mir - toolchain/rustc - Git at Google

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

 ---
 name: narrow_shl_s32_by_2_from_zext_s16
 tracksRegLiveness: 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: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 2
     ; GFX6-NEXT: [[SHL:%[0-9]+]]:_(s16) = G_SHL %masked, [[C]](s16)
     ; GFX6-NEXT: %shl:_(s32) = G_ZEXT [[SHL]](s16)
     ; 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
 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: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 2
     ; GFX6-NEXT: [[SHL:%[0-9]+]]:_(s16) = G_SHL %masked, [[C]](s16)
     ; GFX6-NEXT: %shl:_(s64) = G_ZEXT [[SHL]](s16)
     ; 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: narrow_shl_s16_by_2_from_zext_s8
 tracksRegLiveness: true
 body:             |
   bb.0:
     liveins: $vgpr0

     ; GFX6-LABEL: name: narrow_shl_s16_by_2_from_zext_s8
     ; GFX6: liveins: $vgpr0
     ; GFX6-NEXT: {{  $}}
     ; GFX6-NEXT: %argument:_(s32) = COPY $vgpr0
     ; GFX6-NEXT: %narrow:_(s8) = G_TRUNC %argument(s32)
     ; GFX6-NEXT: %masklow6:_(s8) = G_CONSTANT i8 63
     ; GFX6-NEXT: %masked:_(s8) = G_AND %narrow, %masklow6
     ; GFX6-NEXT: [[C:%[0-9]+]]:_(s8) = G_CONSTANT i8 2
     ; GFX6-NEXT: [[SHL:%[0-9]+]]:_(s8) = G_SHL %masked, [[C]](s8)
     ; GFX6-NEXT: %result:_(s32) = G_ZEXT [[SHL]](s8)
     ; GFX6-NEXT: $vgpr0 = COPY %result(s32)
     ;
     ; GFX9-LABEL: name: narrow_shl_s16_by_2_from_zext_s8
     ; GFX9: liveins: $vgpr0
     ; GFX9-NEXT: {{  $}}
     ; GFX9-NEXT: %argument:_(s32) = COPY $vgpr0
     ; GFX9-NEXT: %narrow:_(s8) = G_TRUNC %argument(s32)
     ; GFX9-NEXT: %masklow6:_(s8) = G_CONSTANT i8 63
     ; GFX9-NEXT: %masked:_(s8) = G_AND %narrow, %masklow6
     ; GFX9-NEXT: [[C:%[0-9]+]]:_(s8) = G_CONSTANT i8 2
     ; GFX9-NEXT: [[SHL:%[0-9]+]]:_(s8) = G_SHL %masked, [[C]](s8)
     ; GFX9-NEXT: %result:_(s32) = G_ZEXT [[SHL]](s8)
     ; GFX9-NEXT: $vgpr0 = COPY %result(s32)
     %argument:_(s32) = COPY $vgpr0
     %narrow:_(s8) = G_TRUNC %argument
     %masklow6:_(s8) = G_CONSTANT i8 63
     %masked:_(s8) = G_AND %narrow, %masklow6
     %extend:_(s16) = G_ZEXT %masked
     %shiftamt:_(s16) = G_CONSTANT i16 2
     %shl:_(s16) = G_SHL %extend, %shiftamt
     %result:_(s32) = G_ANYEXT %shl
     $vgpr0 = COPY %result
 ...

 ---
 name: narrow_shl_v2s32_by_2_from_zext_v2s16
 tracksRegLiveness: true
 body:             |
   bb.0:
     liveins: $vgpr0

     ; GFX6-LABEL: name: narrow_shl_v2s32_by_2_from_zext_v2s16
     ; GFX6: liveins: $vgpr0
     ; GFX6-NEXT: {{  $}}
     ; GFX6-NEXT: %narrow:_(<2 x s16>) = COPY $vgpr0
     ; GFX6-NEXT: %masklow14:_(s16) = G_CONSTANT i16 16383
     ; GFX6-NEXT: %masklow14vec:_(<2 x s16>) = G_BUILD_VECTOR %masklow14(s16), %masklow14(s16)
     ; GFX6-NEXT: %masked:_(<2 x s16>) = G_AND %narrow, %masklow14vec
     ; GFX6-NEXT: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 2
     ; GFX6-NEXT: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR [[C]](s16), [[C]](s16)
     ; GFX6-NEXT: [[SHL:%[0-9]+]]:_(<2 x s16>) = G_SHL %masked, [[BUILD_VECTOR]](<2 x s16>)
     ; GFX6-NEXT: %shl:_(<2 x s32>) = G_ZEXT [[SHL]](<2 x s16>)
     ; GFX6-NEXT: $vgpr0_vgpr1 = COPY %shl(<2 x s32>)
     ;
     ; GFX9-LABEL: name: narrow_shl_v2s32_by_2_from_zext_v2s16
     ; GFX9: liveins: $vgpr0
     ; GFX9-NEXT: {{  $}}
     ; GFX9-NEXT: %narrow:_(<2 x s16>) = COPY $vgpr0
     ; GFX9-NEXT: %masklow14:_(s16) = G_CONSTANT i16 16383
     ; GFX9-NEXT: %masklow14vec:_(<2 x s16>) = G_BUILD_VECTOR %masklow14(s16), %masklow14(s16)
     ; GFX9-NEXT: %masked:_(<2 x s16>) = G_AND %narrow, %masklow14vec
     ; GFX9-NEXT: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 2
     ; GFX9-NEXT: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR [[C]](s16), [[C]](s16)
     ; GFX9-NEXT: [[SHL:%[0-9]+]]:_(<2 x s16>) = G_SHL %masked, [[BUILD_VECTOR]](<2 x s16>)
     ; GFX9-NEXT: %shl:_(<2 x s32>) = G_ZEXT [[SHL]](<2 x s16>)
     ; GFX9-NEXT: $vgpr0_vgpr1 = COPY %shl(<2 x s32>)
     %narrow:_(<2 x s16>) = COPY $vgpr0
     %masklow14:_(s16) = G_CONSTANT i16 16383
     %masklow14vec:_(<2 x s16>) = G_BUILD_VECTOR %masklow14, %masklow14
     %masked:_(<2 x s16>) = G_AND %narrow, %masklow14vec
     %extend:_(<2 x s32>) = G_ZEXT %masked
     %shiftamt:_(s32) = G_CONSTANT i32 2
     %shiftamtvec:_(<2 x s32>) = G_BUILD_VECTOR %shiftamt, %shiftamt
     %shl:_(<2 x s32>) = G_SHL %extend, %shiftamtvec
     $vgpr0_vgpr1 = COPY %shl
 ...

 ---
 name: narrow_shl_v2s64_by_2_from_anyext_v2s32
 tracksRegLiveness: true
 body:             |
   bb.0:
     liveins: $vgpr0_vgpr1

     ; GFX6-LABEL: name: narrow_shl_v2s64_by_2_from_anyext_v2s32
     ; GFX6: liveins: $vgpr0_vgpr1
     ; GFX6-NEXT: {{  $}}
     ; GFX6-NEXT: %narrow:_(<2 x s32>) = COPY $vgpr0_vgpr1
     ; GFX6-NEXT: %masklow30:_(s32) = G_CONSTANT i32 1073741823
     ; GFX6-NEXT: %masklow30vec:_(<2 x s32>) = G_BUILD_VECTOR %masklow30(s32), %masklow30(s32)
     ; GFX6-NEXT: %masked:_(<2 x s32>) = G_AND %narrow, %masklow30vec
     ; GFX6-NEXT: %shiftamt:_(s32) = G_CONSTANT i32 2
     ; GFX6-NEXT: %shiftamtvec:_(<2 x s32>) = G_BUILD_VECTOR %shiftamt(s32), %shiftamt(s32)
     ; GFX6-NEXT: [[SHL:%[0-9]+]]:_(<2 x s32>) = G_SHL %masked, %shiftamtvec(<2 x s32>)
     ; GFX6-NEXT: %shl:_(<2 x s64>) = G_ZEXT [[SHL]](<2 x s32>)
     ; GFX6-NEXT: $vgpr0_vgpr1_vgpr2_vgpr3 = COPY %shl(<2 x s64>)
     ;
     ; GFX9-LABEL: name: narrow_shl_v2s64_by_2_from_anyext_v2s32
     ; GFX9: liveins: $vgpr0_vgpr1
     ; GFX9-NEXT: {{  $}}
     ; GFX9-NEXT: %narrow:_(<2 x s32>) = COPY $vgpr0_vgpr1
     ; GFX9-NEXT: %masklow30:_(s32) = G_CONSTANT i32 1073741823
     ; GFX9-NEXT: %masklow30vec:_(<2 x s32>) = G_BUILD_VECTOR %masklow30(s32), %masklow30(s32)
     ; GFX9-NEXT: %masked:_(<2 x s32>) = G_AND %narrow, %masklow30vec
     ; GFX9-NEXT: %shiftamt:_(s32) = G_CONSTANT i32 2
     ; GFX9-NEXT: %shiftamtvec:_(<2 x s32>) = G_BUILD_VECTOR %shiftamt(s32), %shiftamt(s32)
     ; GFX9-NEXT: [[SHL:%[0-9]+]]:_(<2 x s32>) = G_SHL %masked, %shiftamtvec(<2 x s32>)
     ; GFX9-NEXT: %shl:_(<2 x s64>) = G_ZEXT [[SHL]](<2 x s32>)
     ; GFX9-NEXT: $vgpr0_vgpr1_vgpr2_vgpr3 = COPY %shl(<2 x s64>)
     %narrow:_(<2 x s32>) = COPY $vgpr0_vgpr1
     %masklow30:_(s32) = G_CONSTANT i32 1073741823
     %masklow30vec:_(<2 x s32>) = G_BUILD_VECTOR %masklow30, %masklow30
     %masked:_(<2 x s32>) = G_AND %narrow, %masklow30vec
     %extend:_(<2 x s64>) = G_ANYEXT %masked
     %shiftamt:_(s32) = G_CONSTANT i32 2
     %shiftamtvec:_(<2 x s32>) = G_BUILD_VECTOR %shiftamt, %shiftamt
     %shl:_(<2 x s64>) = G_SHL %extend, %shiftamtvec
     $vgpr0_vgpr1_vgpr2_vgpr3 = 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, $vgpr1
     ; GFX6-LABEL: name: do_not_shl_v2s32_zero_by_16_from_zext_v2s16
     ; GFX6: liveins: $vgpr0, $vgpr1
     ; 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, $vgpr1
     ; 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
 ...
	# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
	# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=tahiti -run-pass=amdgpu-prelegalizer-combiner -verify-machineinstrs %s -o - \| FileCheck -check-prefix=GFX6 %s
	# RUN: llc -mtriple=amdgcn-mesa-mesa3d -mcpu=gfx900 -run-pass=amdgpu-prelegalizer-combiner -verify-machineinstrs %s -o - \| FileCheck -check-prefix=GFX9 %s

	---
	name: narrow_shl_s32_by_2_from_zext_s16
	tracksRegLiveness: 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: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 2
	; GFX6-NEXT: [[SHL:%[0-9]+]]:_(s16) = G_SHL %masked, [[C]](s16)
	; GFX6-NEXT: %shl:_(s32) = G_ZEXT [[SHL]](s16)
	; 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
	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: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 2
	; GFX6-NEXT: [[SHL:%[0-9]+]]:_(s16) = G_SHL %masked, [[C]](s16)
	; GFX6-NEXT: %shl:_(s64) = G_ZEXT [[SHL]](s16)
	; 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: narrow_shl_s16_by_2_from_zext_s8
	tracksRegLiveness: true
	body: \|
	bb.0:
	liveins: $vgpr0

	; GFX6-LABEL: name: narrow_shl_s16_by_2_from_zext_s8
	; GFX6: liveins: $vgpr0
	; GFX6-NEXT: {{ $}}
	; GFX6-NEXT: %argument:_(s32) = COPY $vgpr0
	; GFX6-NEXT: %narrow:_(s8) = G_TRUNC %argument(s32)
	; GFX6-NEXT: %masklow6:_(s8) = G_CONSTANT i8 63
	; GFX6-NEXT: %masked:_(s8) = G_AND %narrow, %masklow6
	; GFX6-NEXT: [[C:%[0-9]+]]:_(s8) = G_CONSTANT i8 2
	; GFX6-NEXT: [[SHL:%[0-9]+]]:_(s8) = G_SHL %masked, [[C]](s8)
	; GFX6-NEXT: %result:_(s32) = G_ZEXT [[SHL]](s8)
	; GFX6-NEXT: $vgpr0 = COPY %result(s32)
	;
	; GFX9-LABEL: name: narrow_shl_s16_by_2_from_zext_s8
	; GFX9: liveins: $vgpr0
	; GFX9-NEXT: {{ $}}
	; GFX9-NEXT: %argument:_(s32) = COPY $vgpr0
	; GFX9-NEXT: %narrow:_(s8) = G_TRUNC %argument(s32)
	; GFX9-NEXT: %masklow6:_(s8) = G_CONSTANT i8 63
	; GFX9-NEXT: %masked:_(s8) = G_AND %narrow, %masklow6
	; GFX9-NEXT: [[C:%[0-9]+]]:_(s8) = G_CONSTANT i8 2
	; GFX9-NEXT: [[SHL:%[0-9]+]]:_(s8) = G_SHL %masked, [[C]](s8)
	; GFX9-NEXT: %result:_(s32) = G_ZEXT [[SHL]](s8)
	; GFX9-NEXT: $vgpr0 = COPY %result(s32)
	%argument:_(s32) = COPY $vgpr0
	%narrow:_(s8) = G_TRUNC %argument
	%masklow6:_(s8) = G_CONSTANT i8 63
	%masked:_(s8) = G_AND %narrow, %masklow6
	%extend:_(s16) = G_ZEXT %masked
	%shiftamt:_(s16) = G_CONSTANT i16 2
	%shl:_(s16) = G_SHL %extend, %shiftamt
	%result:_(s32) = G_ANYEXT %shl
	$vgpr0 = COPY %result
	...

	---
	name: narrow_shl_v2s32_by_2_from_zext_v2s16
	tracksRegLiveness: true
	body: \|
	bb.0:
	liveins: $vgpr0

	; GFX6-LABEL: name: narrow_shl_v2s32_by_2_from_zext_v2s16
	; GFX6: liveins: $vgpr0
	; GFX6-NEXT: {{ $}}
	; GFX6-NEXT: %narrow:_(<2 x s16>) = COPY $vgpr0
	; GFX6-NEXT: %masklow14:_(s16) = G_CONSTANT i16 16383
	; GFX6-NEXT: %masklow14vec:_(<2 x s16>) = G_BUILD_VECTOR %masklow14(s16), %masklow14(s16)
	; GFX6-NEXT: %masked:_(<2 x s16>) = G_AND %narrow, %masklow14vec
	; GFX6-NEXT: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 2
	; GFX6-NEXT: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR [[C]](s16), [[C]](s16)
	; GFX6-NEXT: [[SHL:%[0-9]+]]:_(<2 x s16>) = G_SHL %masked, [[BUILD_VECTOR]](<2 x s16>)
	; GFX6-NEXT: %shl:_(<2 x s32>) = G_ZEXT [[SHL]](<2 x s16>)
	; GFX6-NEXT: $vgpr0_vgpr1 = COPY %shl(<2 x s32>)
	;
	; GFX9-LABEL: name: narrow_shl_v2s32_by_2_from_zext_v2s16
	; GFX9: liveins: $vgpr0
	; GFX9-NEXT: {{ $}}
	; GFX9-NEXT: %narrow:_(<2 x s16>) = COPY $vgpr0
	; GFX9-NEXT: %masklow14:_(s16) = G_CONSTANT i16 16383
	; GFX9-NEXT: %masklow14vec:_(<2 x s16>) = G_BUILD_VECTOR %masklow14(s16), %masklow14(s16)
	; GFX9-NEXT: %masked:_(<2 x s16>) = G_AND %narrow, %masklow14vec
	; GFX9-NEXT: [[C:%[0-9]+]]:_(s16) = G_CONSTANT i16 2
	; GFX9-NEXT: [[BUILD_VECTOR:%[0-9]+]]:_(<2 x s16>) = G_BUILD_VECTOR [[C]](s16), [[C]](s16)
	; GFX9-NEXT: [[SHL:%[0-9]+]]:_(<2 x s16>) = G_SHL %masked, [[BUILD_VECTOR]](<2 x s16>)
	; GFX9-NEXT: %shl:_(<2 x s32>) = G_ZEXT [[SHL]](<2 x s16>)
	; GFX9-NEXT: $vgpr0_vgpr1 = COPY %shl(<2 x s32>)
	%narrow:_(<2 x s16>) = COPY $vgpr0
	%masklow14:_(s16) = G_CONSTANT i16 16383
	%masklow14vec:_(<2 x s16>) = G_BUILD_VECTOR %masklow14, %masklow14
	%masked:_(<2 x s16>) = G_AND %narrow, %masklow14vec
	%extend:_(<2 x s32>) = G_ZEXT %masked
	%shiftamt:_(s32) = G_CONSTANT i32 2
	%shiftamtvec:_(<2 x s32>) = G_BUILD_VECTOR %shiftamt, %shiftamt
	%shl:_(<2 x s32>) = G_SHL %extend, %shiftamtvec
	$vgpr0_vgpr1 = COPY %shl
	...

	---
	name: narrow_shl_v2s64_by_2_from_anyext_v2s32
	tracksRegLiveness: true
	body: \|
	bb.0:
	liveins: $vgpr0_vgpr1

	; GFX6-LABEL: name: narrow_shl_v2s64_by_2_from_anyext_v2s32
	; GFX6: liveins: $vgpr0_vgpr1
	; GFX6-NEXT: {{ $}}
	; GFX6-NEXT: %narrow:_(<2 x s32>) = COPY $vgpr0_vgpr1
	; GFX6-NEXT: %masklow30:_(s32) = G_CONSTANT i32 1073741823
	; GFX6-NEXT: %masklow30vec:_(<2 x s32>) = G_BUILD_VECTOR %masklow30(s32), %masklow30(s32)
	; GFX6-NEXT: %masked:_(<2 x s32>) = G_AND %narrow, %masklow30vec
	; GFX6-NEXT: %shiftamt:_(s32) = G_CONSTANT i32 2
	; GFX6-NEXT: %shiftamtvec:_(<2 x s32>) = G_BUILD_VECTOR %shiftamt(s32), %shiftamt(s32)
	; GFX6-NEXT: [[SHL:%[0-9]+]]:_(<2 x s32>) = G_SHL %masked, %shiftamtvec(<2 x s32>)
	; GFX6-NEXT: %shl:_(<2 x s64>) = G_ZEXT [[SHL]](<2 x s32>)
	; GFX6-NEXT: $vgpr0_vgpr1_vgpr2_vgpr3 = COPY %shl(<2 x s64>)
	;
	; GFX9-LABEL: name: narrow_shl_v2s64_by_2_from_anyext_v2s32
	; GFX9: liveins: $vgpr0_vgpr1
	; GFX9-NEXT: {{ $}}
	; GFX9-NEXT: %narrow:_(<2 x s32>) = COPY $vgpr0_vgpr1
	; GFX9-NEXT: %masklow30:_(s32) = G_CONSTANT i32 1073741823
	; GFX9-NEXT: %masklow30vec:_(<2 x s32>) = G_BUILD_VECTOR %masklow30(s32), %masklow30(s32)
	; GFX9-NEXT: %masked:_(<2 x s32>) = G_AND %narrow, %masklow30vec
	; GFX9-NEXT: %shiftamt:_(s32) = G_CONSTANT i32 2
	; GFX9-NEXT: %shiftamtvec:_(<2 x s32>) = G_BUILD_VECTOR %shiftamt(s32), %shiftamt(s32)
	; GFX9-NEXT: [[SHL:%[0-9]+]]:_(<2 x s32>) = G_SHL %masked, %shiftamtvec(<2 x s32>)
	; GFX9-NEXT: %shl:_(<2 x s64>) = G_ZEXT [[SHL]](<2 x s32>)
	; GFX9-NEXT: $vgpr0_vgpr1_vgpr2_vgpr3 = COPY %shl(<2 x s64>)
	%narrow:_(<2 x s32>) = COPY $vgpr0_vgpr1
	%masklow30:_(s32) = G_CONSTANT i32 1073741823
	%masklow30vec:_(<2 x s32>) = G_BUILD_VECTOR %masklow30, %masklow30
	%masked:_(<2 x s32>) = G_AND %narrow, %masklow30vec
	%extend:_(<2 x s64>) = G_ANYEXT %masked
	%shiftamt:_(s32) = G_CONSTANT i32 2
	%shiftamtvec:_(<2 x s32>) = G_BUILD_VECTOR %shiftamt, %shiftamt
	%shl:_(<2 x s64>) = G_SHL %extend, %shiftamtvec
	$vgpr0_vgpr1_vgpr2_vgpr3 = 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, $vgpr1
	; GFX6-LABEL: name: do_not_shl_v2s32_zero_by_16_from_zext_v2s16
	; GFX6: liveins: $vgpr0, $vgpr1
	; 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, $vgpr1
	; 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
	...