[AMDGPU] Clean up SReg classes

[foad]

Summary

Remove unused LO16 classes SReg_LO16_XM0_XEXEC, SReg_LO16_XEXEC_HI and
SReg_LO16_XM0.

Simplify the definition of SReg_32.

Add SReg_32_XEXEC and use it to improve SReg_1_XEXEC which previously
excluded M0 for no good reason.

Improve SReg_1 which previously excluded EXEC_HI for no good reason.

[foad]

Remove unused LO16 classes SReg_LO16_XM0_XEXEC, SReg_LO16_XEXEC_HI and
SReg_LO16_XM0.

@rampitec did you want to keep these classes to use in future?

[arsenm]

Does this multiply the number of generated register classes for all the without_subX cases?

[foad]

In D140012#3994669, @arsenm wrote:

Does this multiply the number of generated register classes for all the without_subX cases?

I think you mean "with" not "without"? Anyway the total number of register classes decreases from 545 to 543. The diff is:

+SReg_1_with_lo16_in_M0_CLASS_LO16RegClassID
-SReg_LO16_XEXEC_HIRegClassID
-SReg_LO16_XM0RegClassID
-SReg_LO16_XEXEC_HI_and_SReg_LO16_XM0RegClassID
-SReg_LO16_XM0_XEXECRegClassID
-SRegOrLds_32_and_SReg_1RegClassID
+SReg_32_XEXECRegClassID
+SReg_32_XEXEC_HI_and_SReg_32_XM0RegClassID

[Joe_Nash]

LGTM

[rampitec]

In D140012#3994615, @foad wrote:

Remove unused LO16 classes SReg_LO16_XM0_XEXEC, SReg_LO16_XEXEC_HI and
SReg_LO16_XM0.

@rampitec did you want to keep these classes to use in future?

No, we can always add it back if needed.

llvm/lib/Target/AMDGPU/SIRegisterInfo.td

def SReg_32_XM0_XEXEC : SIRegisterClass<"AMDGPU", [i32, f32, i16, f16, v2i16, v2f16, i1], 32,
   (add SGPR_32, VCC_LO, VCC_HI, FLAT_SCR_LO, FLAT_SCR_HI, XNACK_MASK_LO, XNACK_MASK_HI,
    SGPR_NULL, SGPR_NULL_HI, TTMP_32, TMA_LO, TMA_HI, TBA_LO, TBA_HI, SRC_SHARED_BASE_LO,
    SRC_SHARED_LIMIT_LO, SRC_PRIVATE_BASE_LO, SRC_PRIVATE_LIMIT_LO, SRC_SHARED_BASE_HI,
    SRC_SHARED_LIMIT_HI, SRC_PRIVATE_BASE_HI, SRC_PRIVATE_LIMIT_HI, SRC_POPS_EXITING_WAVE_ID,
    SRC_VCCZ, SRC_EXECZ, SRC_SCC)> {
   let AllocationPriority = 0;
 }
 
-def SReg_LO16_XM0_XEXEC : SIRegisterClass<"AMDGPU", [i16, f16], 16,
+def SReg_LO16 : SIRegisterClass<"AMDGPU", [i16, f16], 16,
   (add SGPR_LO16, VCC_LO_LO16, VCC_HI_LO16, FLAT_SCR_LO_LO16, FLAT_SCR_HI_LO16,
    XNACK_MASK_LO_LO16, XNACK_MASK_HI_LO16, SGPR_NULL_LO16, SGPR_NULL_HI_LO16, TTMP_LO16,
    TMA_LO_LO16, TMA_HI_LO16, TBA_LO_LO16, TBA_HI_LO16, SRC_SHARED_BASE_LO_LO16,
    SRC_SHARED_LIMIT_LO_LO16, SRC_PRIVATE_BASE_LO_LO16, SRC_PRIVATE_LIMIT_LO_LO16,
    SRC_SHARED_BASE_HI_LO16, SRC_SHARED_LIMIT_HI_LO16, SRC_PRIVATE_BASE_HI_LO16,
    SRC_PRIVATE_LIMIT_HI_LO16, SRC_POPS_EXITING_WAVE_ID_LO16, SRC_VCCZ_LO16,
-   SRC_EXECZ_LO16, SRC_SCC_LO16)> {
+   SRC_EXECZ_LO16, SRC_SCC_LO16, EXEC_LO_LO16, EXEC_HI_LO16, M0_CLASS_LO16)> {
   let Size = 16;
   let AllocationPriority = 0;
 }
 
-def SReg_32_XEXEC_HI : SIRegisterClass<"AMDGPU", [i32, f32, i16, f16, v2i16, v2f16, i1], 32,
-  (add SReg_32_XM0_XEXEC, EXEC_LO, M0_CLASS)> {
+def SReg_32_XEXEC : SIRegisterClass<"AMDGPU", [i32, f32, i16, f16, v2i16, v2f16, i1], 32,
+  (add SReg_32_XM0_XEXEC, M0_CLASS)> {
   let AllocationPriority = 0;
 }
 
-def SReg_LO16_XEXEC_HI : SIRegisterClass<"AMDGPU", [i16, f16], 16,
-  (add SReg_LO16_XM0_XEXEC, EXEC_LO_LO16, M0_CLASS_LO16)> {
-  let Size = 16;
+def SReg_32_XEXEC_HI : SIRegisterClass<"AMDGPU", [i32, f32, i16, f16, v2i16, v2f16, i1], 32,
+  (add SReg_32_XEXEC, EXEC_LO)> {
   let AllocationPriority = 0;
 }
 
 def SReg_32_XM0 : SIRegisterClass<"AMDGPU", [i32, f32, i16, f16, v2i16, v2f16, i1], 32,
   (add SReg_32_XM0_XEXEC, EXEC_LO, EXEC_HI)> {
   let AllocationPriority = 0;
 }
 
-def SReg_LO16_XM0 : SIRegisterClass<"AMDGPU", [i16, f16], 16,
-  (add SReg_LO16_XM0_XEXEC, EXEC_LO_LO16, EXEC_HI_LO16)> {
-  let Size = 16;
-  let AllocationPriority = 0;
-}
-
-def SReg_LO16 : SIRegisterClass<"AMDGPU", [i16, f16], 16,
-  (add SGPR_LO16, SReg_LO16_XM0, M0_CLASS_LO16, EXEC_LO_LO16, EXEC_HI_LO16, SReg_LO16_XEXEC_HI)> {
-  let Size = 16;
-  let AllocationPriority = 0;
-}
 } // End GeneratePressureSet = 0
 
 // Register class for all scalar registers (SGPRs + Special Registers)
 def SReg_32 : SIRegisterClass<"AMDGPU", [i32, f32, i16, f16, v2i16, v2f16, i1], 32,
-  (add SReg_32_XM0, M0_CLASS, EXEC_LO, EXEC_HI, SReg_32_XEXEC_HI)> {
+  (add SReg_32_XM0, M0_CLASS)> {
   let AllocationPriority = 0;
   let HasSGPR = 1;
 }
 
 let GeneratePressureSet = 0 in {
 def SRegOrLds_32 : SIRegisterClass<"AMDGPU", [i32, f32, i16, f16, v2i16, v2f16], 32,
   (add SReg_32, LDS_DIRECT_CLASS)> {
   let isAllocatable = 0;

 def SReg_64 : SIRegisterClass<"AMDGPU", [v2i32, i64, v2f32, f64, i1, v4i16, v4f16], 32,
   (add SReg_64_XEXEC, EXEC)> {
   let CopyCost = 1;
   let AllocationPriority = 1;
   let HasSGPR = 1;
 }
 
 def SReg_1_XEXEC : SIRegisterClass<"AMDGPU", [i1], 32,
-  (add SReg_64_XEXEC, SReg_32_XM0_XEXEC)> {
+  (add SReg_64_XEXEC, SReg_32_XEXEC)> {
   let CopyCost = 1;
   let isAllocatable = 0;
   let HasSGPR = 1;
 }
 
 def SReg_1 : SIRegisterClass<"AMDGPU", [i1], 32,
-  (add SReg_1_XEXEC, EXEC, EXEC_LO)> {
+  (add SReg_1_XEXEC, EXEC, EXEC_LO, EXEC_HI)> {
   let CopyCost = 1;
   let isAllocatable = 0;
   let HasSGPR = 1;
 }
 
 multiclass SRegClass<int numRegs,
                      list<ValueType> regTypes,
                      SIRegisterTuples regList,

llvm/test/CodeGen/AMDGPU/GlobalISel/irtranslator-inline-asm.ll

define amdgpu_kernel void @asm_simple_agpr_clobber() {
   ; CHECK-NEXT:   S_ENDPGM 0
   call void asm sideeffect "; def a0", "~{a0}"(), !srcloc !0
   ret void
 }
 
 define i32 @asm_vgpr_early_clobber() {
   ; CHECK-LABEL: name: asm_vgpr_early_clobber
   ; CHECK: bb.1 (%ir-block.0):
-  ; CHECK-NEXT:   INLINEASM &"v_mov_b32 $0, 7; v_mov_b32 $1, 7", 1 /* sideeffect attdialect */, 1966091 /* regdef-ec:VGPR_32 */, def early-clobber %0, 1966091 /* regdef-ec:VGPR_32 */, def early-clobber %1, !0
+  ; CHECK-NEXT:   INLINEASM &"v_mov_b32 $0, 7; v_mov_b32 $1, 7", 1 /* sideeffect attdialect */, 1769483 /* regdef-ec:VGPR_32 */, def early-clobber %0, 1769483 /* regdef-ec:VGPR_32 */, def early-clobber %1, !0
   ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY %0
   ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY %1
   ; CHECK-NEXT:   [[ADD:%[0-9]+]]:_(s32) = G_ADD [[COPY]], [[COPY1]]
   ; CHECK-NEXT:   $vgpr0 = COPY [[ADD]](s32)
   ; CHECK-NEXT:   SI_RETURN implicit $vgpr0
   call { i32, i32 } asm sideeffect "v_mov_b32 $0, 7; v_mov_b32 $1, 7", "=&v,=&v"(), !srcloc !0
   %asmresult = extractvalue { i32, i32 } %1, 0
   %asmresult1 = extractvalue { i32, i32 } %1, 1

 entry:
   %0 = tail call i32 asm "v_mov_b32 v1, 7", "={v1}"() nounwind
   ret i32 %0
 }
 
 define i32 @test_single_vgpr_output() nounwind {
   ; CHECK-LABEL: name: test_single_vgpr_output
   ; CHECK: bb.1.entry:
-  ; CHECK-NEXT:   INLINEASM &"v_mov_b32 $0, 7", 0 /* attdialect */, 1966090 /* regdef:VGPR_32 */, def %0
+  ; CHECK-NEXT:   INLINEASM &"v_mov_b32 $0, 7", 0 /* attdialect */, 1769482 /* regdef:VGPR_32 */, def %0
   ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY %0
   ; CHECK-NEXT:   $vgpr0 = COPY [[COPY]](s32)
   ; CHECK-NEXT:   SI_RETURN implicit $vgpr0
 entry:
   %0 = tail call i32 asm "v_mov_b32 $0, 7", "=v"() nounwind
   ret i32 %0
 }
 
 define i32 @test_single_sgpr_output_s32() nounwind {
   ; CHECK-LABEL: name: test_single_sgpr_output_s32
   ; CHECK: bb.1.entry:
-  ; CHECK-NEXT:   INLINEASM &"s_mov_b32 $0, 7", 0 /* attdialect */, 2097162 /* regdef:SReg_32 */, def %0
+  ; CHECK-NEXT:   INLINEASM &"s_mov_b32 $0, 7", 0 /* attdialect */, 1900554 /* regdef:SReg_32 */, def %0
   ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY %0
   ; CHECK-NEXT:   $vgpr0 = COPY [[COPY]](s32)
   ; CHECK-NEXT:   SI_RETURN implicit $vgpr0
 entry:
   %0 = tail call i32 asm "s_mov_b32 $0, 7", "=s"() nounwind
   ret i32 %0
 }
 
 ; Check support for returning several floats
 define float @test_multiple_register_outputs_same() #0 {
   ; CHECK-LABEL: name: test_multiple_register_outputs_same
   ; CHECK: bb.1 (%ir-block.0):
-  ; CHECK-NEXT:   INLINEASM &"v_mov_b32 $0, 0; v_mov_b32 $1, 1", 0 /* attdialect */, 1966090 /* regdef:VGPR_32 */, def %0, 1966090 /* regdef:VGPR_32 */, def %1
+  ; CHECK-NEXT:   INLINEASM &"v_mov_b32 $0, 0; v_mov_b32 $1, 1", 0 /* attdialect */, 1769482 /* regdef:VGPR_32 */, def %0, 1769482 /* regdef:VGPR_32 */, def %1
   ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY %0
   ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY %1
   ; CHECK-NEXT:   [[FADD:%[0-9]+]]:_(s32) = G_FADD [[COPY]], [[COPY1]]
   ; CHECK-NEXT:   $vgpr0 = COPY [[FADD]](s32)
   ; CHECK-NEXT:   SI_RETURN implicit $vgpr0
   %1 = call { float, float } asm "v_mov_b32 $0, 0; v_mov_b32 $1, 1", "=v,=v"()
   %asmresult = extractvalue { float, float } %1, 0
   %asmresult1 = extractvalue { float, float } %1, 1
   %add = fadd float %asmresult, %asmresult1
   ret float %add
 }
 
 ; Check support for returning several floats
 define double @test_multiple_register_outputs_mixed() #0 {
   ; CHECK-LABEL: name: test_multiple_register_outputs_mixed
   ; CHECK: bb.1 (%ir-block.0):
-  ; CHECK-NEXT:   INLINEASM &"v_mov_b32 $0, 0; v_add_f64 $1, 0, 0", 0 /* attdialect */, 1966090 /* regdef:VGPR_32 */, def %0, 3211274 /* regdef:VReg_64 */, def %1
+  ; CHECK-NEXT:   INLINEASM &"v_mov_b32 $0, 0; v_add_f64 $1, 0, 0", 0 /* attdialect */, 1769482 /* regdef:VGPR_32 */, def %0, 3080202 /* regdef:VReg_64 */, def %1
   ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY %0
   ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s64) = COPY %1
   ; CHECK-NEXT:   [[UV:%[0-9]+]]:_(s32), [[UV1:%[0-9]+]]:_(s32) = G_UNMERGE_VALUES [[COPY1]](s64)
   ; CHECK-NEXT:   $vgpr0 = COPY [[UV]](s32)
   ; CHECK-NEXT:   $vgpr1 = COPY [[UV1]](s32)
   ; CHECK-NEXT:   SI_RETURN implicit $vgpr0, implicit $vgpr1
   %1 = call { float, double } asm "v_mov_b32 $0, 0; v_add_f64 $1, 0, 0", "=v,=v"()
   %asmresult = extractvalue { float, double } %1, 1
define float @test_vector_output() nounwind {
   ret float %2
 }
 
 define amdgpu_kernel void @test_input_vgpr_imm() {
   ; CHECK-LABEL: name: test_input_vgpr_imm
   ; CHECK: bb.1 (%ir-block.0):
   ; CHECK-NEXT:   [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 42
   ; CHECK-NEXT:   [[COPY:%[0-9]+]]:vgpr_32 = COPY [[C]](s32)
-  ; CHECK-NEXT:   INLINEASM &"v_mov_b32 v0, $0", 1 /* sideeffect attdialect */, 1966089 /* reguse:VGPR_32 */, [[COPY]]
+  ; CHECK-NEXT:   INLINEASM &"v_mov_b32 v0, $0", 1 /* sideeffect attdialect */, 1769481 /* reguse:VGPR_32 */, [[COPY]]
   ; CHECK-NEXT:   S_ENDPGM 0
   call void asm sideeffect "v_mov_b32 v0, $0", "v"(i32 42)
   ret void
 }
 
 define amdgpu_kernel void @test_input_sgpr_imm() {
   ; CHECK-LABEL: name: test_input_sgpr_imm
   ; CHECK: bb.1 (%ir-block.0):
   ; CHECK-NEXT:   [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 42
   ; CHECK-NEXT:   [[COPY:%[0-9]+]]:sreg_32 = COPY [[C]](s32)
-  ; CHECK-NEXT:   INLINEASM &"s_mov_b32 s0, $0", 1 /* sideeffect attdialect */, 2097161 /* reguse:SReg_32 */, [[COPY]]
+  ; CHECK-NEXT:   INLINEASM &"s_mov_b32 s0, $0", 1 /* sideeffect attdialect */, 1900553 /* reguse:SReg_32 */, [[COPY]]
   ; CHECK-NEXT:   S_ENDPGM 0
   call void asm sideeffect "s_mov_b32 s0, $0", "s"(i32 42)
   ret void
 }
 
 define amdgpu_kernel void @test_input_imm() {
   ; CHECK-LABEL: name: test_input_imm
   ; CHECK: bb.1 (%ir-block.0):
   ; CHECK-NEXT:   INLINEASM &"s_mov_b32 s0, $0", 9 /* sideeffect mayload attdialect */, 13 /* imm */, 42
   ; CHECK-NEXT:   INLINEASM &"s_mov_b64 s[0:1], $0", 9 /* sideeffect mayload attdialect */, 13 /* imm */, 42
   ; CHECK-NEXT:   S_ENDPGM 0
   call void asm sideeffect "s_mov_b32 s0, $0", "i"(i32 42)
   call void asm sideeffect "s_mov_b64 s[0:1], $0", "i"(i64 42)
   ret void
 }
 
 define float @test_input_vgpr(i32 %src) nounwind {
   ; CHECK-LABEL: name: test_input_vgpr
   ; CHECK: bb.1.entry:
   ; CHECK-NEXT:   liveins: $vgpr0
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
   ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:vgpr_32 = COPY [[COPY]](s32)
-  ; CHECK-NEXT:   INLINEASM &"v_add_f32 $0, 1.0, $1", 0 /* attdialect */, 1966090 /* regdef:VGPR_32 */, def %1, 1966089 /* reguse:VGPR_32 */, [[COPY1]]
+  ; CHECK-NEXT:   INLINEASM &"v_add_f32 $0, 1.0, $1", 0 /* attdialect */, 1769482 /* regdef:VGPR_32 */, def %1, 1769481 /* reguse:VGPR_32 */, [[COPY1]]
   ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s32) = COPY %1
   ; CHECK-NEXT:   $vgpr0 = COPY [[COPY2]](s32)
   ; CHECK-NEXT:   SI_RETURN implicit $vgpr0
 entry:
   %0 = tail call float asm "v_add_f32 $0, 1.0, $1", "=v,v"(i32 %src) nounwind
   ret float %0
 }
 
 define i32 @test_memory_constraint(ptr addrspace(3) %a) nounwind {
   ; CHECK-LABEL: name: test_memory_constraint
   ; CHECK: bb.1 (%ir-block.0):
   ; CHECK-NEXT:   liveins: $vgpr0
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(p3) = COPY $vgpr0
-  ; CHECK-NEXT:   INLINEASM &"ds_read_b32 $0, $1", 8 /* mayload attdialect */, 1966090 /* regdef:VGPR_32 */, def %1, 262158 /* mem:m */, [[COPY]](p3)
+  ; CHECK-NEXT:   INLINEASM &"ds_read_b32 $0, $1", 8 /* mayload attdialect */, 1769482 /* regdef:VGPR_32 */, def %1, 262158 /* mem:m */, [[COPY]](p3)
   ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY %1
   ; CHECK-NEXT:   $vgpr0 = COPY [[COPY1]](s32)
   ; CHECK-NEXT:   SI_RETURN implicit $vgpr0
   %1 = tail call i32 asm "ds_read_b32 $0, $1", "=v,*m"(ptr addrspace(3) elementtype(i32) %a)
   ret i32 %1
 }
 
 define i32 @test_vgpr_matching_constraint(i32 %a) nounwind {
   ; CHECK-LABEL: name: test_vgpr_matching_constraint
   ; CHECK: bb.1 (%ir-block.0):
   ; CHECK-NEXT:   liveins: $vgpr0
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
   ; CHECK-NEXT:   [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 1
   ; CHECK-NEXT:   [[AND:%[0-9]+]]:_(s32) = G_AND [[COPY]], [[C]]
   ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:vgpr_32 = COPY [[AND]](s32)
-  ; CHECK-NEXT:   INLINEASM &";", 1 /* sideeffect attdialect */, 1966090 /* regdef:VGPR_32 */, def %3, 2147483657 /* reguse tiedto:$0 */, [[COPY1]](tied-def 3)
+  ; CHECK-NEXT:   INLINEASM &";", 1 /* sideeffect attdialect */, 1769482 /* regdef:VGPR_32 */, def %3, 2147483657 /* reguse tiedto:$0 */, [[COPY1]](tied-def 3)
   ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s32) = COPY %3
   ; CHECK-NEXT:   $vgpr0 = COPY [[COPY2]](s32)
   ; CHECK-NEXT:   SI_RETURN implicit $vgpr0
   %and = and i32 %a, 1
   %asm = call i32 asm sideeffect ";", "=v,0"(i32 %and)
   ret i32 %asm
 }
 
 define i32 @test_sgpr_matching_constraint() nounwind {
   ; CHECK-LABEL: name: test_sgpr_matching_constraint
   ; CHECK: bb.1.entry:
-  ; CHECK-NEXT:   INLINEASM &"s_mov_b32 $0, 7", 0 /* attdialect */, 2097162 /* regdef:SReg_32 */, def %0
+  ; CHECK-NEXT:   INLINEASM &"s_mov_b32 $0, 7", 0 /* attdialect */, 1900554 /* regdef:SReg_32 */, def %0
   ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY %0
-  ; CHECK-NEXT:   INLINEASM &"s_mov_b32 $0, 8", 0 /* attdialect */, 2097162 /* regdef:SReg_32 */, def %2
+  ; CHECK-NEXT:   INLINEASM &"s_mov_b32 $0, 8", 0 /* attdialect */, 1900554 /* regdef:SReg_32 */, def %2
   ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY %2
   ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:sreg_32 = COPY [[COPY]](s32)
   ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:sreg_32 = COPY [[COPY1]](s32)
-  ; CHECK-NEXT:   INLINEASM &"s_add_u32 $0, $1, $2", 0 /* attdialect */, 2097162 /* regdef:SReg_32 */, def %4, 2097161 /* reguse:SReg_32 */, [[COPY2]], 2147483657 /* reguse tiedto:$0 */, [[COPY3]](tied-def 3)
+  ; CHECK-NEXT:   INLINEASM &"s_add_u32 $0, $1, $2", 0 /* attdialect */, 1900554 /* regdef:SReg_32 */, def %4, 1900553 /* reguse:SReg_32 */, [[COPY2]], 2147483657 /* reguse tiedto:$0 */, [[COPY3]](tied-def 3)
   ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:_(s32) = COPY %4
   ; CHECK-NEXT:   $vgpr0 = COPY [[COPY4]](s32)
   ; CHECK-NEXT:   SI_RETURN implicit $vgpr0
 entry:
   %asm0 = tail call i32 asm "s_mov_b32 $0, 7", "=s"() nounwind
   %asm1 = tail call i32 asm "s_mov_b32 $0, 8", "=s"() nounwind
   %asm2 = tail call i32 asm "s_add_u32 $0, $1, $2", "=s,s,0"(i32 %asm0, i32 %asm1) nounwind
   ret i32 %asm2
 }
 
 define void @test_many_matching_constraints(i32 %a, i32 %b, i32 %c) nounwind {
   ; CHECK-LABEL: name: test_many_matching_constraints
   ; CHECK: bb.1 (%ir-block.0):
   ; CHECK-NEXT:   liveins: $vgpr0, $vgpr1, $vgpr2
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
   ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:_(s32) = COPY $vgpr1
   ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s32) = COPY $vgpr2
   ; CHECK-NEXT:   [[DEF:%[0-9]+]]:_(p1) = G_IMPLICIT_DEF
   ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:vgpr_32 = COPY [[COPY2]](s32)
   ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:vgpr_32 = COPY [[COPY]](s32)
   ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:vgpr_32 = COPY [[COPY1]](s32)
-  ; CHECK-NEXT:   INLINEASM &"; ", 1 /* sideeffect attdialect */, 1966090 /* regdef:VGPR_32 */, def %3, 1966090 /* regdef:VGPR_32 */, def %4, 1966090 /* regdef:VGPR_32 */, def %5, 2147483657 /* reguse tiedto:$0 */, [[COPY3]](tied-def 3), 2147614729 /* reguse tiedto:$2 */, [[COPY4]](tied-def 7), 2147549193 /* reguse tiedto:$1 */, [[COPY5]](tied-def 5)
+  ; CHECK-NEXT:   INLINEASM &"; ", 1 /* sideeffect attdialect */, 1769482 /* regdef:VGPR_32 */, def %3, 1769482 /* regdef:VGPR_32 */, def %4, 1769482 /* regdef:VGPR_32 */, def %5, 2147483657 /* reguse tiedto:$0 */, [[COPY3]](tied-def 3), 2147614729 /* reguse tiedto:$2 */, [[COPY4]](tied-def 7), 2147549193 /* reguse tiedto:$1 */, [[COPY5]](tied-def 5)
   ; CHECK-NEXT:   [[COPY6:%[0-9]+]]:_(s32) = COPY %3
   ; CHECK-NEXT:   [[COPY7:%[0-9]+]]:_(s32) = COPY %4
   ; CHECK-NEXT:   [[COPY8:%[0-9]+]]:_(s32) = COPY %5
   ; CHECK-NEXT:   G_STORE [[COPY6]](s32), [[DEF]](p1) :: (store (s32) into `ptr addrspace(1) undef`, addrspace 1)
   ; CHECK-NEXT:   G_STORE [[COPY7]](s32), [[DEF]](p1) :: (store (s32) into `ptr addrspace(1) undef`, addrspace 1)
   ; CHECK-NEXT:   G_STORE [[COPY8]](s32), [[DEF]](p1) :: (store (s32) into `ptr addrspace(1) undef`, addrspace 1)
   ; CHECK-NEXT:   SI_RETURN
   %asm = call {i32, i32, i32} asm sideeffect "; ", "=v,=v,=v,0,2,1"(i32 %c, i32 %a, i32 %b)
   %asmresult0 = extractvalue  {i32, i32, i32} %asm, 0
   store i32 %asmresult0, ptr addrspace(1) undef
   %asmresult1 = extractvalue  {i32, i32, i32} %asm, 1
   store i32 %asmresult1, ptr addrspace(1) undef
   %asmresult2 = extractvalue  {i32, i32, i32} %asm, 2
   store i32 %asmresult2, ptr addrspace(1) undef
   ret void
 }
 
 define i32 @test_sgpr_to_vgpr_move_matching_constraint() nounwind {
   ; CHECK-LABEL: name: test_sgpr_to_vgpr_move_matching_constraint
   ; CHECK: bb.1.entry:
-  ; CHECK-NEXT:   INLINEASM &"s_mov_b32 $0, 7", 0 /* attdialect */, 2097162 /* regdef:SReg_32 */, def %0
+  ; CHECK-NEXT:   INLINEASM &"s_mov_b32 $0, 7", 0 /* attdialect */, 1900554 /* regdef:SReg_32 */, def %0
   ; CHECK-NEXT:   [[COPY:%[0-9]+]]:_(s32) = COPY %0
   ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:vgpr_32 = COPY [[COPY]](s32)
-  ; CHECK-NEXT:   INLINEASM &"v_mov_b32 $0, $1", 0 /* attdialect */, 1966090 /* regdef:VGPR_32 */, def %2, 2147483657 /* reguse tiedto:$0 */, [[COPY1]](tied-def 3)
+  ; CHECK-NEXT:   INLINEASM &"v_mov_b32 $0, $1", 0 /* attdialect */, 1769482 /* regdef:VGPR_32 */, def %2, 2147483657 /* reguse tiedto:$0 */, [[COPY1]](tied-def 3)
   ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:_(s32) = COPY %2
   ; CHECK-NEXT:   $vgpr0 = COPY [[COPY2]](s32)
   ; CHECK-NEXT:   SI_RETURN implicit $vgpr0
 entry:
   %asm0 = tail call i32 asm "s_mov_b32 $0, 7", "=s"() nounwind
   %asm1 = tail call i32 asm "v_mov_b32 $0, $1", "=v,0"(i32 %asm0) nounwind
   ret i32 %asm1
 }

llvm/test/CodeGen/AMDGPU/branch-relax-no-terminators.mir

body:             |
   ; CHECK-NEXT:   $sgpr1 = V_READLANE_B32 killed $vgpr2, 1
   ; CHECK-NEXT:   $vgpr2 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, 0, 0, implicit $exec :: (load (s32) from %stack.0, addrspace 5)
   ; CHECK-NEXT:   $exec = S_NOT_B64 $exec, implicit-def dead $scc, implicit killed $vgpr2
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT: bb.2:
   ; CHECK-NEXT:   successors: %bb.3(0x04000000), %bb.7(0x7c000000)
   ; CHECK-NEXT:   liveins: $vcc_hi, $vcc_lo, $sgpr5, $sgpr6, $sgpr7, $sgpr8, $sgpr9, $sgpr10, $sgpr11, $sgpr12, $sgpr13, $sgpr14, $sgpr15, $sgpr16, $sgpr17, $sgpr18, $sgpr19, $sgpr20, $sgpr21, $sgpr22, $sgpr23, $sgpr24, $sgpr25, $sgpr26, $sgpr27, $sgpr28, $sgpr29, $sgpr30, $sgpr31, $sgpr34, $sgpr35, $sgpr36, $sgpr37, $sgpr38, $sgpr39, $sgpr40, $sgpr41, $sgpr42, $sgpr43, $sgpr44, $sgpr45, $sgpr46, $sgpr47, $sgpr48, $sgpr49, $sgpr50, $sgpr51, $sgpr52, $sgpr53, $sgpr54, $sgpr55, $sgpr56, $sgpr57, $sgpr58, $sgpr59, $sgpr60, $sgpr61, $sgpr62, $sgpr63, $sgpr64, $sgpr65, $sgpr66, $sgpr67, $sgpr68, $sgpr69, $sgpr70, $sgpr71, $sgpr72, $sgpr73, $sgpr74, $sgpr75, $sgpr76, $sgpr77, $sgpr78, $sgpr79, $sgpr80, $sgpr81, $sgpr82, $sgpr83, $sgpr84, $sgpr85, $sgpr86, $sgpr87, $sgpr88, $sgpr89, $sgpr90, $sgpr91, $sgpr92, $sgpr93, $sgpr94, $sgpr95, $sgpr96, $sgpr97, $sgpr98, $sgpr99, $sgpr100, $sgpr101, $vgpr0, $vgpr1
   ; CHECK-NEXT: {{  $}}
-  ; CHECK-NEXT:   INLINEASM &"v_nop_e64\0A    v_nop_e64\0A    v_nop_e64\0A    v_nop_e64\0A    v_nop_e64\0A    v_nop_e64\0A    v_nop_e64\0A    v_nop_e64", 1 /* sideeffect attdialect */, 2097162 /* regdef:SReg_32 */, def renamable $sgpr4
+  ; CHECK-NEXT:   INLINEASM &"v_nop_e64\0A    v_nop_e64\0A    v_nop_e64\0A    v_nop_e64\0A    v_nop_e64\0A    v_nop_e64\0A    v_nop_e64\0A    v_nop_e64", 1 /* sideeffect attdialect */, 2097162 /* regdef:SReg_32_XEXEC */, def renamable $sgpr4
   ; CHECK-NEXT:   S_CMP_LG_U32 killed renamable $sgpr4, 0, implicit-def $scc
   ; CHECK-NEXT:   S_CBRANCH_SCC0 %bb.3, implicit killed $scc
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT: bb.7:
   ; CHECK-NEXT:   successors: %bb.8(0x80000000)
   ; CHECK-NEXT:   liveins: $vcc_hi, $vcc_lo, $sgpr5, $sgpr6, $sgpr7, $sgpr8, $sgpr9, $sgpr10, $sgpr11, $sgpr12, $sgpr13, $sgpr14, $sgpr15, $sgpr16, $sgpr17, $sgpr18, $sgpr19, $sgpr20, $sgpr21, $sgpr22, $sgpr23, $sgpr24, $sgpr25, $sgpr26, $sgpr27, $sgpr28, $sgpr29, $sgpr30, $sgpr31, $sgpr34, $sgpr35, $sgpr36, $sgpr37, $sgpr38, $sgpr39, $sgpr40, $sgpr41, $sgpr42, $sgpr43, $sgpr44, $sgpr45, $sgpr46, $sgpr47, $sgpr48, $sgpr49, $sgpr50, $sgpr51, $sgpr52, $sgpr53, $sgpr54, $sgpr55, $sgpr56, $sgpr57, $sgpr58, $sgpr59, $sgpr60, $sgpr61, $sgpr62, $sgpr63, $sgpr64, $sgpr65, $sgpr66, $sgpr67, $sgpr68, $sgpr69, $sgpr70, $sgpr71, $sgpr72, $sgpr73, $sgpr74, $sgpr75, $sgpr76, $sgpr77, $sgpr78, $sgpr79, $sgpr80, $sgpr81, $sgpr82, $sgpr83, $sgpr84, $sgpr85, $sgpr86, $sgpr87, $sgpr88, $sgpr89, $sgpr90, $sgpr91, $sgpr92, $sgpr93, $sgpr94, $sgpr95, $sgpr96, $sgpr97, $sgpr98, $sgpr99, $sgpr100, $sgpr101, $vgpr0, $vgpr1
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT:   $exec = S_NOT_B64 $exec, implicit-def dead $scc, implicit-def $vgpr2
body:             |
   ; CHECK-NEXT:   $sgpr4 = S_MOV_B32 killed $sgpr5
   ; CHECK-NEXT:   $sgpr5 = S_MOV_B32 killed $sgpr6
   ; CHECK-NEXT:   $sgpr6 = S_MOV_B32 killed $sgpr7
   ; CHECK-NEXT:   $sgpr7 = S_MOV_B32 killed $sgpr8
   ; CHECK-NEXT:   $sgpr8 = S_MOV_B32 killed $sgpr9
   ; CHECK-NEXT:   $sgpr9 = S_MOV_B32 killed $sgpr10
   ; CHECK-NEXT:   $sgpr10 = S_MOV_B32 killed $sgpr11
   ; CHECK-NEXT:   S_BRANCH %bb.4
-  ; CHECK-NOT:    S_BRANCH %bb.4
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT: bb.6:
   ; CHECK-NEXT:   successors: %bb.4(0x80000000)
   ; CHECK-NEXT:   liveins: $vcc_hi, $vcc_lo, $sgpr4, $sgpr5, $sgpr6, $sgpr7, $sgpr8, $sgpr9, $sgpr10, $sgpr11, $sgpr12, $sgpr13, $sgpr14, $sgpr15, $sgpr16, $sgpr17, $sgpr18, $sgpr19, $sgpr20, $sgpr21, $sgpr22, $sgpr23, $sgpr24, $sgpr25, $sgpr26, $sgpr27, $sgpr28, $sgpr29, $sgpr30, $sgpr31, $sgpr34, $sgpr35, $sgpr36, $sgpr37, $sgpr38, $sgpr39, $sgpr40, $sgpr41, $sgpr42, $sgpr43, $sgpr44, $sgpr45, $sgpr46, $sgpr47, $sgpr48, $sgpr49, $sgpr50, $sgpr51, $sgpr52, $sgpr53, $sgpr54, $sgpr55, $sgpr56, $sgpr57, $sgpr58, $sgpr59, $sgpr60, $sgpr61, $sgpr62, $sgpr63, $sgpr64, $sgpr65, $sgpr66, $sgpr67, $sgpr68, $sgpr69, $sgpr70, $sgpr71, $sgpr72, $sgpr73, $sgpr74, $sgpr75, $sgpr76, $sgpr77, $sgpr78, $sgpr79, $sgpr80, $sgpr81, $sgpr82, $sgpr83, $sgpr84, $sgpr85, $sgpr86, $sgpr87, $sgpr88, $sgpr89, $sgpr90, $sgpr91, $sgpr92, $sgpr93, $sgpr94, $sgpr95, $sgpr96, $sgpr97, $sgpr98, $sgpr99, $sgpr100, $sgpr101, $vgpr0, $vgpr1, $vgpr2, $sgpr33
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT:   $sgpr0 = V_READLANE_B32 $vgpr2, 0, implicit-def $sgpr0_sgpr1
   ; CHECK-NEXT:   $sgpr1 = V_READLANE_B32 killed $vgpr2, 1
   ; CHECK-NEXT:   $vgpr2 = BUFFER_LOAD_DWORD_OFFSET $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, 0, 0, implicit $exec :: (load (s32) from %stack.0, addrspace 5)

llvm/test/CodeGen/AMDGPU/coalescer-early-clobber-subreg.mir

 tracksRegLiveness: true
 body:             |
   bb.0:
     liveins: $vgpr0_vgpr1
 
     ; CHECK-LABEL: name: foo1
     ; CHECK: liveins: $vgpr0_vgpr1
     ; CHECK-NEXT: {{  $}}
-    ; CHECK-NEXT: INLINEASM &"", 0 /* attdialect */, 1835018 /* regdef:VRegOrLds_32 */, def undef %2.sub0, 1835019 /* regdef-ec:VRegOrLds_32 */, def undef early-clobber %2.sub1
+    ; CHECK-NEXT: INLINEASM &"", 0 /* attdialect */, 1835018 /* regdef:SRegOrLds_32 */, def undef %2.sub0, 1835019 /* regdef-ec:SRegOrLds_32 */, def undef early-clobber %2.sub1
     ; CHECK-NEXT: FLAT_STORE_DWORDX2 $vgpr0_vgpr1, %2, 0, 0, implicit $exec, implicit $flat_scr :: (store (s64))
     ; CHECK-NEXT: S_ENDPGM 0
     INLINEASM &"", 0 /* attdialect */, 1835018 /* regdef:VGPR_32 */, def %0:vgpr_32, 1835019 /* regdef-ec:VGPR_32 */, def early-clobber %1:vgpr_32
     undef %2.sub0:vreg_64 = COPY killed %0
     %2.sub1:vreg_64 = COPY killed %1
     FLAT_STORE_DWORDX2 killed $vgpr0_vgpr1, killed %2, 0, 0, implicit $exec, implicit $flat_scr :: (store (s64))
     S_ENDPGM 0
 
 ...
 
 ---
 name:            foo2
 tracksRegLiveness: true
 body:             |
   bb.0:
     liveins: $vgpr0_vgpr1
 
     ; CHECK-LABEL: name: foo2
     ; CHECK: liveins: $vgpr0_vgpr1
     ; CHECK-NEXT: {{  $}}
-    ; CHECK-NEXT: INLINEASM &"", 0 /* attdialect */, 1835019 /* regdef-ec:VRegOrLds_32 */, def undef early-clobber %2.sub1, 1835018 /* regdef:VRegOrLds_32 */, def undef %2.sub0
+    ; CHECK-NEXT: INLINEASM &"", 0 /* attdialect */, 1835019 /* regdef-ec:SRegOrLds_32 */, def undef early-clobber %2.sub1, 1835018 /* regdef:SRegOrLds_32 */, def undef %2.sub0
     ; CHECK-NEXT: FLAT_STORE_DWORDX2 $vgpr0_vgpr1, %2, 0, 0, implicit $exec, implicit $flat_scr :: (store (s64))
     ; CHECK-NEXT: S_ENDPGM 0
     INLINEASM &"", 0 /* attdialect */, 1835019 /* regdef-ec:VGPR_32 */, def early-clobber %1:vgpr_32, 1835018 /* regdef:VGPR_32 */, def %0:vgpr_32
     undef %2.sub0:vreg_64 = COPY killed %0
     %2.sub1:vreg_64 = COPY killed %1
     FLAT_STORE_DWORDX2 killed $vgpr0_vgpr1, killed %2, 0, 0, implicit $exec, implicit $flat_scr :: (store (s64))
     S_ENDPGM 0
 
 ...
 
 ---
 name:            foo3
 tracksRegLiveness: true
 body:             |
   bb.0:
     liveins: $vgpr0_vgpr1
 
     ; CHECK-LABEL: name: foo3
     ; CHECK: liveins: $vgpr0_vgpr1
     ; CHECK-NEXT: {{  $}}
-    ; CHECK-NEXT: INLINEASM &"", 0 /* attdialect */, 1835018 /* regdef:VRegOrLds_32 */, def undef %2.sub0, 1835019 /* regdef-ec:VRegOrLds_32 */, def undef early-clobber %2.sub1
+    ; CHECK-NEXT: INLINEASM &"", 0 /* attdialect */, 1835018 /* regdef:SRegOrLds_32 */, def undef %2.sub0, 1835019 /* regdef-ec:SRegOrLds_32 */, def undef early-clobber %2.sub1
     ; CHECK-NEXT: FLAT_STORE_DWORDX2 $vgpr0_vgpr1, %2, 0, 0, implicit $exec, implicit $flat_scr :: (store (s64))
     ; CHECK-NEXT: S_ENDPGM 0
     INLINEASM &"", 0 /* attdialect */, 1835018 /* regdef:VGPR_32 */, def %1:vgpr_32, 1835019 /* regdef-ec:VGPR_32 */, def early-clobber %0:vgpr_32
     undef %2.sub0:vreg_64 = COPY killed %1
     %2.sub1:vreg_64 = COPY killed %0
     FLAT_STORE_DWORDX2 killed $vgpr0_vgpr1, killed %2, 0, 0, implicit $exec, implicit $flat_scr :: (store (s64))
     S_ENDPGM 0
 
 ...
 
 ---
 name:            foo4
 tracksRegLiveness: true
 body:             |
   bb.0:
     liveins: $vgpr0_vgpr1
 
     ; CHECK-LABEL: name: foo4
     ; CHECK: liveins: $vgpr0_vgpr1
     ; CHECK-NEXT: {{  $}}
-    ; CHECK-NEXT: INLINEASM &"", 0 /* attdialect */, 1835019 /* regdef-ec:VRegOrLds_32 */, def undef early-clobber %2.sub1, 1835018 /* regdef:VRegOrLds_32 */, def undef %2.sub0
+    ; CHECK-NEXT: INLINEASM &"", 0 /* attdialect */, 1835019 /* regdef-ec:SRegOrLds_32 */, def undef early-clobber %2.sub1, 1835018 /* regdef:SRegOrLds_32 */, def undef %2.sub0
     ; CHECK-NEXT: FLAT_STORE_DWORDX2 $vgpr0_vgpr1, %2, 0, 0, implicit $exec, implicit $flat_scr :: (store (s64))
     ; CHECK-NEXT: S_ENDPGM 0
     INLINEASM &"", 0 /* attdialect */, 1835019 /* regdef-ec:VGPR_32 */, def early-clobber %0:vgpr_32, 1835018 /* regdef:VGPR_32 */, def %1:vgpr_32
     undef %2.sub0:vreg_64 = COPY killed %1
     %2.sub1:vreg_64 = COPY killed %0
     FLAT_STORE_DWORDX2 killed $vgpr0_vgpr1, killed %2, 0, 0, implicit $exec, implicit $flat_scr :: (store (s64))
     S_ENDPGM 0
 
 ...

llvm/test/CodeGen/AMDGPU/inline-asm.i128.ll

 ; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
 ; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 -stop-after=finalize-isel -o - %s | FileCheck -check-prefix=GFX908 %s
 ; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a -stop-after=finalize-isel -o - %s | FileCheck -check-prefix=GFX90A %s
 
 ; Make sure we only use one 128-bit register instead of 2 for i128 asm
 ; constraints
 
 define amdgpu_kernel void @s_input_output_i128() {
   ; GFX908-LABEL: name: s_input_output_i128
   ; GFX908: bb.0 (%ir-block.0):
-  ; GFX908-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 6881290 /* regdef:SGPR_128 */, def %4
+  ; GFX908-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 6750218 /* regdef:SGPR_128 */, def %4
   ; GFX908-NEXT:   [[COPY:%[0-9]+]]:sgpr_128 = COPY %4
-  ; GFX908-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 6881289 /* reguse:SGPR_128 */, [[COPY]]
+  ; GFX908-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 6750217 /* reguse:SGPR_128 */, [[COPY]]
   ; GFX908-NEXT:   S_ENDPGM 0
   ; GFX90A-LABEL: name: s_input_output_i128
   ; GFX90A: bb.0 (%ir-block.0):
-  ; GFX90A-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 6881290 /* regdef:SGPR_128 */, def %4
+  ; GFX90A-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 6750218 /* regdef:SGPR_128 */, def %4
   ; GFX90A-NEXT:   [[COPY:%[0-9]+]]:sgpr_128 = COPY %4
-  ; GFX90A-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 6881289 /* reguse:SGPR_128 */, [[COPY]]
+  ; GFX90A-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 6750217 /* reguse:SGPR_128 */, [[COPY]]
   ; GFX90A-NEXT:   S_ENDPGM 0
   %val = tail call i128 asm sideeffect "; def $0", "=s"()
   call void asm sideeffect "; use $0", "s"(i128 %val)
   ret void
 }
 
 define amdgpu_kernel void @v_input_output_i128() {
   ; GFX908-LABEL: name: v_input_output_i128
   ; GFX908: bb.0 (%ir-block.0):
-  ; GFX908-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 5832714 /* regdef:VReg_128 */, def %4
+  ; GFX908-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 5701642 /* regdef:VReg_128 */, def %4
   ; GFX908-NEXT:   [[COPY:%[0-9]+]]:vreg_128 = COPY %4
-  ; GFX908-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 5832713 /* reguse:VReg_128 */, [[COPY]]
+  ; GFX908-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 5701641 /* reguse:VReg_128 */, [[COPY]]
   ; GFX908-NEXT:   S_ENDPGM 0
   ; GFX90A-LABEL: name: v_input_output_i128
   ; GFX90A: bb.0 (%ir-block.0):
-  ; GFX90A-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 6160394 /* regdef:VReg_128_Align2 */, def %4
+  ; GFX90A-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 6029322 /* regdef:VReg_128_Align2 */, def %4
   ; GFX90A-NEXT:   [[COPY:%[0-9]+]]:vreg_128_align2 = COPY %4
-  ; GFX90A-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 6160393 /* reguse:VReg_128_Align2 */, [[COPY]]
+  ; GFX90A-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 6029321 /* reguse:VReg_128_Align2 */, [[COPY]]
   ; GFX90A-NEXT:   S_ENDPGM 0
   %val = tail call i128 asm sideeffect "; def $0", "=v"()
   call void asm sideeffect "; use $0", "v"(i128 %val)
   ret void
 }
 
 define amdgpu_kernel void @a_input_output_i128() {
   ; GFX908-LABEL: name: a_input_output_i128
   ; GFX908: bb.0 (%ir-block.0):
-  ; GFX908-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 5767178 /* regdef:AReg_128 */, def %4
+  ; GFX908-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 5636106 /* regdef:AReg_128 */, def %4
   ; GFX908-NEXT:   [[COPY:%[0-9]+]]:areg_128 = COPY %4
-  ; GFX908-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 5767177 /* reguse:AReg_128 */, [[COPY]]
+  ; GFX908-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 5636105 /* reguse:AReg_128 */, [[COPY]]
   ; GFX908-NEXT:   S_ENDPGM 0
   ; GFX90A-LABEL: name: a_input_output_i128
   ; GFX90A: bb.0 (%ir-block.0):
-  ; GFX90A-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 6029322 /* regdef:AReg_128_Align2 */, def %4
+  ; GFX90A-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 5898250 /* regdef:AReg_128_Align2 */, def %4
   ; GFX90A-NEXT:   [[COPY:%[0-9]+]]:areg_128_align2 = COPY %4
-  ; GFX90A-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 6029321 /* reguse:AReg_128_Align2 */, [[COPY]]
+  ; GFX90A-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 5898249 /* reguse:AReg_128_Align2 */, [[COPY]]
   ; GFX90A-NEXT:   S_ENDPGM 0
   %val = call i128 asm sideeffect "; def $0", "=a"()
   call void asm sideeffect "; use $0", "a"(i128 %val)
   ret void
 }

llvm/test/CodeGen/AMDGPU/partial-regcopy-and-spill-missed-at-regalloc.ll

 ; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
 ;RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 --stop-after=greedy,1 -verify-machineinstrs < %s | FileCheck -check-prefix=REGALLOC-GFX908 %s
 ;RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 --stop-after=prologepilog -verify-machineinstrs < %s | FileCheck -check-prefix=PEI-GFX908 %s
 ;RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a --stop-after=greedy,1 -verify-machineinstrs < %s | FileCheck -check-prefix=REGALLOC-GFX90A %s
 ;RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a --stop-after=prologepilog -verify-machineinstrs < %s | FileCheck -check-prefix=PEI-GFX90A %s
 
 ; Partial reg copy and spill missed during regalloc handled later at frame lowering.
 define amdgpu_kernel void @partial_copy(<4 x i32> %arg) #0 {
   ; REGALLOC-GFX908-LABEL: name: partial_copy
   ; REGALLOC-GFX908: bb.0 (%ir-block.0):
   ; REGALLOC-GFX908-NEXT:   liveins: $sgpr4_sgpr5
   ; REGALLOC-GFX908-NEXT: {{  $}}
-  ; REGALLOC-GFX908-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 1900553 /* reguse:AGPR_32 */, undef %5:agpr_32
-  ; REGALLOC-GFX908-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 5832714 /* regdef:VReg_128 */, def %26
+  ; REGALLOC-GFX908-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 1703945 /* reguse:AGPR_32 */, undef %5:agpr_32
+  ; REGALLOC-GFX908-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 5701642 /* regdef:VReg_128 */, def %26
   ; REGALLOC-GFX908-NEXT:   [[COPY:%[0-9]+]]:av_128 = COPY %26
-  ; REGALLOC-GFX908-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 3211274 /* regdef:VReg_64 */, def %23
+  ; REGALLOC-GFX908-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 3080202 /* regdef:VReg_64 */, def %23
   ; REGALLOC-GFX908-NEXT:   SI_SPILL_V64_SAVE %23, %stack.0, $sgpr32, 0, implicit $exec :: (store (s64) into %stack.0, align 4, addrspace 5)
   ; REGALLOC-GFX908-NEXT:   [[COPY1:%[0-9]+]]:vreg_128 = COPY [[COPY]]
   ; REGALLOC-GFX908-NEXT:   GLOBAL_STORE_DWORDX4 undef %14:vreg_64, [[COPY1]], 0, 0, implicit $exec :: (volatile store (s128) into `<4 x i32> addrspace(1)* undef`, addrspace 1)
   ; REGALLOC-GFX908-NEXT:   renamable $sgpr0_sgpr1_sgpr2_sgpr3 = S_LOAD_DWORDX4_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (s128) from %ir.arg.kernarg.offset.cast, addrspace 4)
   ; REGALLOC-GFX908-NEXT:   [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 1, implicit $exec
   ; REGALLOC-GFX908-NEXT:   [[COPY2:%[0-9]+]]:areg_128 = COPY killed renamable $sgpr0_sgpr1_sgpr2_sgpr3
   ; REGALLOC-GFX908-NEXT:   [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 2, implicit $exec
   ; REGALLOC-GFX908-NEXT:   [[V_MFMA_I32_4X4X4I8_e64_:%[0-9]+]]:areg_128 = V_MFMA_I32_4X4X4I8_e64 [[V_MOV_B32_e32_]], [[V_MOV_B32_e32_1]], [[COPY2]], 0, 0, 0, implicit $mode, implicit $exec
   ; REGALLOC-GFX908-NEXT:   [[SI_SPILL_V64_RESTORE:%[0-9]+]]:vreg_64 = SI_SPILL_V64_RESTORE %stack.0, $sgpr32, 0, implicit $exec :: (load (s64) from %stack.0, align 4, addrspace 5)
   ; REGALLOC-GFX908-NEXT:   GLOBAL_STORE_DWORDX2 undef %16:vreg_64, [[SI_SPILL_V64_RESTORE]], 0, 0, implicit $exec :: (volatile store (s64) into `<2 x i32> addrspace(1)* undef`, addrspace 1)
   ; REGALLOC-GFX908-NEXT:   [[COPY3:%[0-9]+]]:vreg_128 = COPY [[V_MFMA_I32_4X4X4I8_e64_]]
   ; REGALLOC-GFX908-NEXT:   GLOBAL_STORE_DWORDX4 undef %18:vreg_64, [[COPY3]], 0, 0, implicit $exec :: (volatile store (s128) into `<4 x i32> addrspace(1)* undef`, addrspace 1)
   ; REGALLOC-GFX908-NEXT:   S_ENDPGM 0
   ; PEI-GFX908-LABEL: name: partial_copy
   ; PEI-GFX908: bb.0 (%ir-block.0):
   ; PEI-GFX908-NEXT:   liveins: $agpr4, $sgpr4_sgpr5, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr7
   ; PEI-GFX908-NEXT: {{  $}}
   ; PEI-GFX908-NEXT:   $sgpr8_sgpr9_sgpr10_sgpr11 = COPY killed $sgpr0_sgpr1_sgpr2_sgpr3
   ; PEI-GFX908-NEXT:   $sgpr8 = S_ADD_U32 $sgpr8, $sgpr7, implicit-def $scc, implicit-def $sgpr8_sgpr9_sgpr10_sgpr11
   ; PEI-GFX908-NEXT:   $sgpr9 = S_ADDC_U32 $sgpr9, 0, implicit-def dead $scc, implicit $scc, implicit-def $sgpr8_sgpr9_sgpr10_sgpr11
-  ; PEI-GFX908-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 1900553 /* reguse:AGPR_32 */, undef renamable $agpr0
-  ; PEI-GFX908-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 5832714 /* regdef:VReg_128 */, def renamable $vgpr0_vgpr1_vgpr2_vgpr3
+  ; PEI-GFX908-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 1703945 /* reguse:AGPR_32 */, undef renamable $agpr0
+  ; PEI-GFX908-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 5701642 /* regdef:VReg_128 */, def renamable $vgpr0_vgpr1_vgpr2_vgpr3
   ; PEI-GFX908-NEXT:   renamable $agpr0_agpr1_agpr2_agpr3 = COPY killed renamable $vgpr0_vgpr1_vgpr2_vgpr3, implicit $exec
-  ; PEI-GFX908-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 3211274 /* regdef:VReg_64 */, def renamable $vgpr0_vgpr1
+  ; PEI-GFX908-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 3080202 /* regdef:VReg_64 */, def renamable $vgpr0_vgpr1
   ; PEI-GFX908-NEXT:   BUFFER_STORE_DWORD_OFFSET killed $vgpr0, $sgpr8_sgpr9_sgpr10_sgpr11, 0, 4, 0, 0, implicit $exec, implicit-def $vgpr0_vgpr1, implicit $vgpr0_vgpr1 :: (store (s32) into %stack.0, addrspace 5)
   ; PEI-GFX908-NEXT:   $agpr4 = V_ACCVGPR_WRITE_B32_e64 killed $vgpr1, implicit $exec, implicit killed $vgpr0_vgpr1
   ; PEI-GFX908-NEXT:   renamable $vgpr0_vgpr1_vgpr2_vgpr3 = COPY killed renamable $agpr0_agpr1_agpr2_agpr3, implicit $exec
   ; PEI-GFX908-NEXT:   GLOBAL_STORE_DWORDX4 undef renamable $vgpr0_vgpr1, killed renamable $vgpr0_vgpr1_vgpr2_vgpr3, 0, 0, implicit $exec :: (volatile store (s128) into `<4 x i32> addrspace(1)* undef`, addrspace 1)
   ; PEI-GFX908-NEXT:   renamable $sgpr0_sgpr1_sgpr2_sgpr3 = S_LOAD_DWORDX4_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (s128) from %ir.arg.kernarg.offset.cast, addrspace 4)
   ; PEI-GFX908-NEXT:   renamable $vgpr0 = V_MOV_B32_e32 1, implicit $exec
   ; PEI-GFX908-NEXT:   renamable $agpr0_agpr1_agpr2_agpr3 = COPY killed renamable $sgpr0_sgpr1_sgpr2_sgpr3, implicit $exec
   ; PEI-GFX908-NEXT:   renamable $vgpr1 = V_MOV_B32_e32 2, implicit $exec
   ; PEI-GFX908-NEXT:   renamable $agpr0_agpr1_agpr2_agpr3 = V_MFMA_I32_4X4X4I8_e64 killed $vgpr0, killed $vgpr1, killed $agpr0_agpr1_agpr2_agpr3, 0, 0, 0, implicit $mode, implicit $exec
   ; PEI-GFX908-NEXT:   $vgpr0 = BUFFER_LOAD_DWORD_OFFSET $sgpr8_sgpr9_sgpr10_sgpr11, 0, 4, 0, 0, implicit $exec, implicit-def $vgpr0_vgpr1 :: (load (s32) from %stack.0, addrspace 5)
   ; PEI-GFX908-NEXT:   $vgpr1 = V_ACCVGPR_READ_B32_e64 $agpr4, implicit $exec, implicit-def $vgpr0_vgpr1
   ; PEI-GFX908-NEXT:   GLOBAL_STORE_DWORDX2 undef renamable $vgpr0_vgpr1, killed renamable $vgpr0_vgpr1, 0, 0, implicit $exec :: (volatile store (s64) into `<2 x i32> addrspace(1)* undef`, addrspace 1)
   ; PEI-GFX908-NEXT:   renamable $vgpr0_vgpr1_vgpr2_vgpr3 = COPY killed renamable $agpr0_agpr1_agpr2_agpr3, implicit $exec
   ; PEI-GFX908-NEXT:   GLOBAL_STORE_DWORDX4 undef renamable $vgpr0_vgpr1, killed renamable $vgpr0_vgpr1_vgpr2_vgpr3, 0, 0, implicit $exec :: (volatile store (s128) into `<4 x i32> addrspace(1)* undef`, addrspace 1)
   ; PEI-GFX908-NEXT:   S_ENDPGM 0
   ; REGALLOC-GFX90A-LABEL: name: partial_copy
   ; REGALLOC-GFX90A: bb.0 (%ir-block.0):
   ; REGALLOC-GFX90A-NEXT:   liveins: $sgpr4_sgpr5
   ; REGALLOC-GFX90A-NEXT: {{  $}}
-  ; REGALLOC-GFX90A-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 1900553 /* reguse:AGPR_32 */, undef %5:agpr_32
-  ; REGALLOC-GFX90A-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 6160394 /* regdef:VReg_128_Align2 */, def %25
+  ; REGALLOC-GFX90A-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 1703945 /* reguse:AGPR_32 */, undef %5:agpr_32
+  ; REGALLOC-GFX90A-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 6029322 /* regdef:VReg_128_Align2 */, def %25
   ; REGALLOC-GFX90A-NEXT:   [[COPY:%[0-9]+]]:av_128_align2 = COPY %25
-  ; REGALLOC-GFX90A-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 3538954 /* regdef:VReg_64_Align2 */, def %23
+  ; REGALLOC-GFX90A-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 3407882 /* regdef:VReg_64_Align2 */, def %23
   ; REGALLOC-GFX90A-NEXT:   SI_SPILL_V64_SAVE %23, %stack.0, $sgpr32, 0, implicit $exec :: (store (s64) into %stack.0, align 4, addrspace 5)
   ; REGALLOC-GFX90A-NEXT:   GLOBAL_STORE_DWORDX4 undef %14:vreg_64_align2, [[COPY]], 0, 0, implicit $exec :: (volatile store (s128) into `<4 x i32> addrspace(1)* undef`, addrspace 1)
   ; REGALLOC-GFX90A-NEXT:   renamable $sgpr0_sgpr1_sgpr2_sgpr3 = S_LOAD_DWORDX4_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (s128) from %ir.arg.kernarg.offset.cast, addrspace 4)
   ; REGALLOC-GFX90A-NEXT:   [[COPY1:%[0-9]+]]:areg_128_align2 = COPY killed renamable $sgpr0_sgpr1_sgpr2_sgpr3
   ; REGALLOC-GFX90A-NEXT:   [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 1, implicit $exec
   ; REGALLOC-GFX90A-NEXT:   [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 2, implicit $exec
   ; REGALLOC-GFX90A-NEXT:   [[V_MFMA_I32_4X4X4I8_e64_:%[0-9]+]]:areg_128_align2 = V_MFMA_I32_4X4X4I8_e64 [[V_MOV_B32_e32_]], [[V_MOV_B32_e32_1]], [[COPY1]], 0, 0, 0, implicit $mode, implicit $exec
   ; REGALLOC-GFX90A-NEXT:   [[SI_SPILL_AV64_RESTORE:%[0-9]+]]:av_64_align2 = SI_SPILL_AV64_RESTORE %stack.0, $sgpr32, 0, implicit $exec :: (load (s64) from %stack.0, align 4, addrspace 5)
   ; REGALLOC-GFX90A-NEXT:   GLOBAL_STORE_DWORDX2 undef %16:vreg_64_align2, [[SI_SPILL_AV64_RESTORE]], 0, 0, implicit $exec :: (volatile store (s64) into `<2 x i32> addrspace(1)* undef`, addrspace 1)
   ; REGALLOC-GFX90A-NEXT:   GLOBAL_STORE_DWORDX4 undef %18:vreg_64_align2, [[V_MFMA_I32_4X4X4I8_e64_]], 0, 0, implicit $exec :: (volatile store (s128) into `<4 x i32> addrspace(1)* undef`, addrspace 1)
   ; REGALLOC-GFX90A-NEXT:   S_ENDPGM 0
   ; PEI-GFX90A-LABEL: name: partial_copy
   ; PEI-GFX90A: bb.0 (%ir-block.0):
   ; PEI-GFX90A-NEXT:   liveins: $agpr4, $sgpr4_sgpr5, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr7
   ; PEI-GFX90A-NEXT: {{  $}}
   ; PEI-GFX90A-NEXT:   $sgpr8_sgpr9_sgpr10_sgpr11 = COPY killed $sgpr0_sgpr1_sgpr2_sgpr3
   ; PEI-GFX90A-NEXT:   $sgpr8 = S_ADD_U32 $sgpr8, $sgpr7, implicit-def $scc, implicit-def $sgpr8_sgpr9_sgpr10_sgpr11
   ; PEI-GFX90A-NEXT:   $sgpr9 = S_ADDC_U32 $sgpr9, 0, implicit-def dead $scc, implicit $scc, implicit-def $sgpr8_sgpr9_sgpr10_sgpr11
-  ; PEI-GFX90A-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 1900553 /* reguse:AGPR_32 */, undef renamable $agpr0
-  ; PEI-GFX90A-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 6160394 /* regdef:VReg_128_Align2 */, def renamable $vgpr0_vgpr1_vgpr2_vgpr3
+  ; PEI-GFX90A-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 1703945 /* reguse:AGPR_32 */, undef renamable $agpr0
+  ; PEI-GFX90A-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 6029322 /* regdef:VReg_128_Align2 */, def renamable $vgpr0_vgpr1_vgpr2_vgpr3
   ; PEI-GFX90A-NEXT:   renamable $agpr0_agpr1_agpr2_agpr3 = COPY killed renamable $vgpr0_vgpr1_vgpr2_vgpr3, implicit $exec
-  ; PEI-GFX90A-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 3538954 /* regdef:VReg_64_Align2 */, def renamable $vgpr0_vgpr1
+  ; PEI-GFX90A-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 3407882 /* regdef:VReg_64_Align2 */, def renamable $vgpr0_vgpr1
   ; PEI-GFX90A-NEXT:   BUFFER_STORE_DWORD_OFFSET killed $vgpr0, $sgpr8_sgpr9_sgpr10_sgpr11, 0, 4, 0, 0, implicit $exec, implicit-def $vgpr0_vgpr1, implicit $vgpr0_vgpr1 :: (store (s32) into %stack.0, addrspace 5)
   ; PEI-GFX90A-NEXT:   $agpr4 = V_ACCVGPR_WRITE_B32_e64 killed $vgpr1, implicit $exec, implicit killed $vgpr0_vgpr1
   ; PEI-GFX90A-NEXT:   GLOBAL_STORE_DWORDX4 undef renamable $vgpr0_vgpr1, killed renamable $agpr0_agpr1_agpr2_agpr3, 0, 0, implicit $exec :: (volatile store (s128) into `<4 x i32> addrspace(1)* undef`, addrspace 1)
   ; PEI-GFX90A-NEXT:   renamable $sgpr0_sgpr1_sgpr2_sgpr3 = S_LOAD_DWORDX4_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (s128) from %ir.arg.kernarg.offset.cast, addrspace 4)
   ; PEI-GFX90A-NEXT:   renamable $agpr0_agpr1_agpr2_agpr3 = COPY killed renamable $sgpr0_sgpr1_sgpr2_sgpr3, implicit $exec
   ; PEI-GFX90A-NEXT:   renamable $vgpr0 = V_MOV_B32_e32 1, implicit $exec
   ; PEI-GFX90A-NEXT:   renamable $vgpr1 = V_MOV_B32_e32 2, implicit $exec
   ; PEI-GFX90A-NEXT:   renamable $agpr0_agpr1_agpr2_agpr3 = V_MFMA_I32_4X4X4I8_e64 killed $vgpr0, killed $vgpr1, killed $agpr0_agpr1_agpr2_agpr3, 0, 0, 0, implicit $mode, implicit $exec

llvm/test/CodeGen/AMDGPU/sched-assert-dead-def-subreg-use-other-subreg.mir

body:             |
   ; CHECK-NEXT:   [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
   ; CHECK-NEXT:   [[V_ADD_U32_e32_:%[0-9]+]]:vgpr_32 = V_ADD_U32_e32 0, [[V_MOV_B32_e32_]], implicit $exec
   ; CHECK-NEXT:   [[COPY:%[0-9]+]]:vreg_512 = COPY %0
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT: bb.1:
   ; CHECK-NEXT:   successors: %bb.1(0x80000000)
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT:   BUFFER_STORE_DWORD_OFFEN %0.sub3, undef %5:vgpr_32, $sgpr24_sgpr25_sgpr26_sgpr27, $sgpr32, 0, 0, 0, implicit $exec :: (store (s32), align 8, addrspace 5)
-  ; CHECK-NEXT:   dead %6:vgpr_32 = DS_READ_B32_gfx9 undef %7:vgpr_32, 0, 0, implicit $exec
-  ; CHECK-NEXT:   dead %8:vreg_64 = DS_READ_B64_gfx9 [[V_MOV_B32_e32_]], 0, 0, implicit $exec
-  ; CHECK-NEXT:   dead %9:vreg_128 = DS_READ_B128_gfx9 [[V_ADD_U32_e32_]], 0, 0, implicit $exec
+  ; CHECK-NEXT:   dead [[DS_READ_B32_gfx9_:%[0-9]+]]:vgpr_32 = DS_READ_B32_gfx9 undef %7:vgpr_32, 0, 0, implicit $exec
+  ; CHECK-NEXT:   dead [[DS_READ_B64_gfx9_:%[0-9]+]]:vreg_64 = DS_READ_B64_gfx9 [[V_MOV_B32_e32_]], 0, 0, implicit $exec
+  ; CHECK-NEXT:   dead [[DS_READ_B128_gfx9_:%[0-9]+]]:vreg_128 = DS_READ_B128_gfx9 [[V_ADD_U32_e32_]], 0, 0, implicit $exec
   ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:vgpr_32 = COPY [[COPY]].sub0
   ; CHECK-NEXT:   undef %11.sub1:vreg_512 = COPY [[COPY]].sub1
-  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_LO16 */, def dead [[COPY1]], 851978 /* regdef:VGPR_LO16 */, def dead [[COPY]].sub1, 2147483657 /* reguse tiedto:$0 */, [[COPY1]], 2147549193 /* reguse tiedto:$1 */, [[COPY]].sub1
+  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_HI16 */, def dead [[COPY1]], 851978 /* regdef:VGPR_HI16 */, def dead [[COPY]].sub1, 2147483657 /* reguse tiedto:$0 */, [[COPY1]], 2147549193 /* reguse tiedto:$1 */, [[COPY]].sub1
   ; CHECK-NEXT:   %11.sub0:vreg_512 = COPY [[COPY]].sub0
   ; CHECK-NEXT:   %11.sub3:vreg_512 = COPY [[COPY]].sub3
   ; CHECK-NEXT:   [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
-  ; CHECK-NEXT:   dead %10:vgpr_32 = V_ADD_CO_U32_e32 4, [[V_MOV_B32_e32_1]], implicit-def dead $vcc, implicit $exec
+  ; CHECK-NEXT:   dead [[V_ADD_CO_U32_e32_:%[0-9]+]]:vgpr_32 = V_ADD_CO_U32_e32 4, [[V_MOV_B32_e32_1]], implicit-def dead $vcc, implicit $exec
   ; CHECK-NEXT:   %11.sub2:vreg_512 = COPY undef [[V_MOV_B32_e32_]]
   ; CHECK-NEXT:   %11.sub5:vreg_512 = COPY undef [[V_MOV_B32_e32_]]
   ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:vreg_512 = COPY %11
   ; CHECK-NEXT:   S_BRANCH %bb.1
   bb.0:
     liveins: $sgpr6_sgpr7
 
     undef %0.sub3:vreg_512 = V_MOV_B32_e32 0, implicit $exec

llvm/test/CodeGen/AMDGPU/sched-handleMoveUp-subreg-def-across-subreg-def.mir

body:             |
   ; CHECK-NEXT:   [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 -4, implicit $exec
   ; CHECK-NEXT:   [[DEF:%[0-9]+]]:vreg_64 = IMPLICIT_DEF
   ; CHECK-NEXT:   [[DEF1:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
   ; CHECK-NEXT:   [[DEF2:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT: bb.1:
   ; CHECK-NEXT:   successors: %bb.1(0x80000000)
   ; CHECK-NEXT: {{  $}}
-  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_LO16 */, def dead %11
+  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_HI16 */, def dead %11
   ; CHECK-NEXT:   GLOBAL_STORE_DWORD undef %12:vreg_64, [[BUFFER_LOAD_DWORD_OFFEN]], 0, 0, implicit $exec :: (store (s32), addrspace 1)
   ; CHECK-NEXT:   [[V_MOV_B32_e32_2:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
   ; CHECK-NEXT:   [[V_MOV_B32_e32_3:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
   ; CHECK-NEXT:   [[DS_READ_B64_gfx9_:%[0-9]+]]:vreg_64 = DS_READ_B64_gfx9 undef %14:vgpr_32, 0, 0, implicit $exec :: (load (s64), addrspace 3)
-  ; CHECK-NEXT:   INLINEASM &"def $0 $1", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_LO16 */, def %15, 851978 /* regdef:VGPR_LO16 */, def %16
+  ; CHECK-NEXT:   INLINEASM &"def $0 $1", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_HI16 */, def %15, 851978 /* regdef:VGPR_HI16 */, def %16
   ; CHECK-NEXT:   [[DS_READ_B32_gfx9_:%[0-9]+]]:vgpr_32 = DS_READ_B32_gfx9 [[V_MOV_B32_e32_]], 0, 0, implicit $exec
   ; CHECK-NEXT:   [[DS_READ_B32_gfx9_1:%[0-9]+]]:vgpr_32 = DS_READ_B32_gfx9 [[V_MOV_B32_e32_1]], 0, 0, implicit $exec
   ; CHECK-NEXT:   [[DS_READ_B32_gfx9_2:%[0-9]+]]:vgpr_32 = DS_READ_B32_gfx9 undef %20:vgpr_32, 0, 0, implicit $exec
-  ; CHECK-NEXT:   INLINEASM &"def $0 $1", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_LO16 */, def %21, 851978 /* regdef:VGPR_LO16 */, def %22
+  ; CHECK-NEXT:   INLINEASM &"def $0 $1", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_HI16 */, def %21, 851978 /* regdef:VGPR_HI16 */, def %22
   ; CHECK-NEXT:   [[DS_READ_B32_gfx9_3:%[0-9]+]]:vgpr_32 = DS_READ_B32_gfx9 [[V_MOV_B32_e32_1]], 0, 0, implicit $exec
-  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_LO16 */, def dead [[V_MOV_B32_e32_2]], 851978 /* regdef:VGPR_LO16 */, def dead [[V_MOV_B32_e32_3]], 851977 /* reguse:VGPR_LO16 */, [[DS_READ_B64_gfx9_]].sub0, 2147483657 /* reguse tiedto:$0 */, [[V_MOV_B32_e32_2]](tied-def 3), 2147549193 /* reguse tiedto:$1 */, [[V_MOV_B32_e32_3]](tied-def 5), 851977 /* reguse:VGPR_LO16 */, %15, 851977 /* reguse:VGPR_LO16 */, %16, 851977 /* reguse:VGPR_LO16 */, [[DS_READ_B32_gfx9_1]], 851977 /* reguse:VGPR_LO16 */, [[DS_READ_B32_gfx9_]], 851977 /* reguse:VGPR_LO16 */, [[DS_READ_B32_gfx9_3]], 851977 /* reguse:VGPR_LO16 */, [[DS_READ_B32_gfx9_2]]
+  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_HI16 */, def dead [[V_MOV_B32_e32_2]], 851978 /* regdef:VGPR_HI16 */, def dead [[V_MOV_B32_e32_3]], 851977 /* reguse:VGPR_HI16 */, [[DS_READ_B64_gfx9_]].sub0, 2147483657 /* reguse tiedto:$0 */, [[V_MOV_B32_e32_2]](tied-def 3), 2147549193 /* reguse tiedto:$1 */, [[V_MOV_B32_e32_3]](tied-def 5), 851977 /* reguse:VGPR_HI16 */, %15, 851977 /* reguse:VGPR_HI16 */, %16, 851977 /* reguse:VGPR_HI16 */, [[DS_READ_B32_gfx9_1]], 851977 /* reguse:VGPR_HI16 */, [[DS_READ_B32_gfx9_]], 851977 /* reguse:VGPR_HI16 */, [[DS_READ_B32_gfx9_3]], 851977 /* reguse:VGPR_HI16 */, [[DS_READ_B32_gfx9_2]]
   ; CHECK-NEXT:   %5.sub1:vreg_64 = COPY [[V_MOV_B32_e32_]]
   ; CHECK-NEXT:   DS_WRITE_B32_gfx9 undef %28:vgpr_32, %21, 0, 0, implicit $exec :: (store (s32), addrspace 3)
   ; CHECK-NEXT:   DS_WRITE_B32_gfx9 undef %29:vgpr_32, %22, 0, 0, implicit $exec :: (store (s32), addrspace 3)
   ; CHECK-NEXT:   DS_WRITE_B64_gfx9 undef %30:vgpr_32, %5, 0, 0, implicit $exec :: (store (s64), addrspace 3)
   ; CHECK-NEXT:   undef %31.sub1:vreg_64 = FLAT_LOAD_DWORD undef %32:vreg_64, 0, 0, implicit $exec, implicit $flat_scr :: (load (s32))
   ; CHECK-NEXT:   [[V_ADD_U32_e32_:%[0-9]+]]:vgpr_32 = V_ADD_U32_e32 1, [[DEF2]], implicit $exec
   ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:vgpr_32 = COPY [[S_LOAD_DWORDX2_IMM]].sub1
   ; CHECK-NEXT:   [[DEF]].sub1:vreg_64 = COPY [[V_MOV_B32_e32_]]

llvm/test/CodeGen/AMDGPU/spill-vector-superclass.ll

 ; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
 ; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 -stop-after=greedy,1 -verify-machineinstrs -o - %s | FileCheck -check-prefix=GCN %s
 ; Convert AV spills into VGPR spills by introducing appropriate copies in between.
 
 define amdgpu_kernel void @test_spill_av_class(<4 x i32> %arg) #0 {
   ; GCN-LABEL: name: test_spill_av_class
   ; GCN: bb.0 (%ir-block.0):
   ; GCN-NEXT:   liveins: $sgpr4_sgpr5
   ; GCN-NEXT: {{  $}}
   ; GCN-NEXT:   renamable $sgpr0_sgpr1_sgpr2_sgpr3 = S_LOAD_DWORDX4_IMM killed renamable $sgpr4_sgpr5, 0, 0 :: (dereferenceable invariant load (s128) from %ir.arg.kernarg.offset.cast, addrspace 4)
   ; GCN-NEXT:   [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 1, implicit $exec
   ; GCN-NEXT:   [[V_MOV_B32_e32_1:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 2, implicit $exec
   ; GCN-NEXT:   [[COPY:%[0-9]+]]:areg_128 = COPY killed renamable $sgpr0_sgpr1_sgpr2_sgpr3
   ; GCN-NEXT:   [[V_MFMA_I32_4X4X4I8_e64_:%[0-9]+]]:areg_128 = V_MFMA_I32_4X4X4I8_e64 [[V_MOV_B32_e32_]], [[V_MOV_B32_e32_1]], [[COPY]], 0, 0, 0, implicit $mode, implicit $exec
-  ; GCN-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 1966090 /* regdef:VGPR_32 */, def undef %22.sub0
+  ; GCN-NEXT:   INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 1769482 /* regdef:VGPR_32 */, def undef %22.sub0
   ; GCN-NEXT:   undef %24.sub0:av_64 = COPY %22.sub0
   ; GCN-NEXT:   SI_SPILL_AV64_SAVE %24, %stack.0, $sgpr32, 0, implicit $exec :: (store (s64) into %stack.0, align 4, addrspace 5)
   ; GCN-NEXT:   [[COPY1:%[0-9]+]]:vreg_128 = COPY [[V_MFMA_I32_4X4X4I8_e64_]]
   ; GCN-NEXT:   GLOBAL_STORE_DWORDX4 undef %16:vreg_64, [[COPY1]], 0, 0, implicit $exec :: (volatile store (s128) into `<4 x i32> addrspace(1)* undef`, addrspace 1)
   ; GCN-NEXT:   [[SI_SPILL_AV64_RESTORE:%[0-9]+]]:av_64 = SI_SPILL_AV64_RESTORE %stack.0, $sgpr32, 0, implicit $exec :: (load (s64) from %stack.0, align 4, addrspace 5)
   ; GCN-NEXT:   undef %23.sub0:vreg_64 = COPY [[SI_SPILL_AV64_RESTORE]].sub0
-  ; GCN-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 3211273 /* reguse:VReg_64 */, %23
+  ; GCN-NEXT:   INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 3080201 /* reguse:VReg_64 */, %23
   ; GCN-NEXT:   S_ENDPGM 0
   %v0 = call i32 asm sideeffect "; def $0", "=v"()
   %tmp = insertelement <2 x i32> undef, i32 %v0, i32 0
   %mai = tail call <4 x i32> @llvm.amdgcn.mfma.i32.4x4x4i8(i32 1, i32 2, <4 x i32> %arg, i32 0, i32 0, i32 0)
   store volatile <4 x i32> %mai, <4 x i32> addrspace(1)* undef
   call void asm sideeffect "; use $0", "v"(<2 x i32> %tmp);
   ret void
 }
 
 declare <4 x i32> @llvm.amdgcn.mfma.i32.4x4x4i8(i32, i32, <4 x i32>, i32, i32, i32)
 
 attributes #0 = { nounwind "amdgpu-num-vgpr"="5" }

llvm/test/CodeGen/AMDGPU/subreg-undef-def-with-other-subreg-defs.mir

body:             |
   ; CHECK-NEXT:   undef %0.sub0:vreg_64 = V_MOV_B32_e32 0, implicit $exec
   ; CHECK-NEXT:   %0.sub1:vreg_64 = V_MOV_B32_e32 0, implicit $exec
   ; CHECK-NEXT:   [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT: bb.1:
   ; CHECK-NEXT:   successors: %bb.1(0x80000000)
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT:   [[DS_READ_B32_gfx9_:%[0-9]+]]:vgpr_32 = DS_READ_B32_gfx9 [[V_MOV_B32_e32_]], 0, 0, implicit $exec :: (load (s32), addrspace 3)
-  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_LO16 */, def %0, 2147549193 /* reguse tiedto:$1 */, %0(tied-def 3)
-  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851977 /* reguse:VGPR_LO16 */, [[DS_READ_B32_gfx9_]]
-  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_LO16 */, def undef %0.sub0, 851978 /* regdef:VGPR_LO16 */, def undef %0.sub1
+  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_HI16 */, def %0, 2147549193 /* reguse tiedto:$1 */, %0(tied-def 3)
+  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851977 /* reguse:VGPR_HI16 */, [[DS_READ_B32_gfx9_]]
+  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_HI16 */, def undef %0.sub0, 851978 /* regdef:VGPR_HI16 */, def undef %0.sub1
   ; CHECK-NEXT:   S_NOP 0, implicit %0.sub1
   ; CHECK-NEXT:   $sgpr10 = S_MOV_B32 -1
   ; CHECK-NEXT:   S_BRANCH %bb.1
   bb.0:
     undef %0.sub0:vreg_64 = V_MOV_B32_e32 0, implicit $exec
     %0.sub1:vreg_64 = V_MOV_B32_e32 0, implicit $exec
     %1:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
 
body:             |
   ; CHECK-NEXT:   undef %0.sub0:vreg_64 = V_MOV_B32_e32 0, implicit $exec
   ; CHECK-NEXT:   %0.sub1:vreg_64 = V_MOV_B32_e32 0, implicit $exec
   ; CHECK-NEXT:   [[V_MOV_B32_e32_:%[0-9]+]]:vgpr_32 = V_MOV_B32_e32 0, implicit $exec
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT: bb.1:
   ; CHECK-NEXT:   successors: %bb.1(0x80000000)
   ; CHECK-NEXT: {{  $}}
   ; CHECK-NEXT:   [[DS_READ_B32_gfx9_:%[0-9]+]]:vgpr_32 = DS_READ_B32_gfx9 [[V_MOV_B32_e32_]], 0, 0, implicit $exec :: (load (s32), addrspace 3)
-  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_LO16 */, def %0, 2147549193 /* reguse tiedto:$1 */, %0(tied-def 3)
-  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851977 /* reguse:VGPR_LO16 */, [[DS_READ_B32_gfx9_]]
-  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_LO16 */, def undef %0.sub1, 851978 /* regdef:VGPR_LO16 */, def undef %0.sub0
+  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_HI16 */, def %0, 2147549193 /* reguse tiedto:$1 */, %0(tied-def 3)
+  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851977 /* reguse:VGPR_HI16 */, [[DS_READ_B32_gfx9_]]
+  ; CHECK-NEXT:   INLINEASM &"", 1 /* sideeffect attdialect */, 851978 /* regdef:VGPR_HI16 */, def undef %0.sub1, 851978 /* regdef:VGPR_HI16 */, def undef %0.sub0
   ; CHECK-NEXT:   S_NOP 0, implicit %0.sub1
   ; CHECK-NEXT:   $sgpr10 = S_MOV_B32 -1
   ; CHECK-NEXT:   S_BRANCH %bb.1
   bb.0:
     undef %0.sub0:vreg_64 = V_MOV_B32_e32 0, implicit $exec
     %0.sub1:vreg_64 = V_MOV_B32_e32 0, implicit $exec
     %1:vgpr_32 = V_MOV_B32_e32 0, implicit $exec