test/CodeGen/AArch64/live-debugvalues-sve.mir - llvm-project/llvm - Git at Google

 # RUN: llc -start-before=prologepilog -stop-after=livedebugvalues -mattr=+sve -o - %s | FileCheck %s
 # RUN: llc -start-before=prologepilog -stop-after=livedebugvalues -experimental-debug-variable-locations -mattr=+sve -o - %s | FileCheck %s
 #
 # Test that the LiveDebugValues pass can correctly handle the address
 # of the SVE spill (at a scalable address location) which is expressed
 # with a complex DIExpression.
 #
 # CHECK: $z2 = ORR_ZZZ killed $z1, $z1
 # CHECK: $z1 = ORR_ZZZ killed $z0, $z0
 # CHECK-DAG: ST1W_IMM renamable $z1, killed renamable $p{{[0-9]+}}, $fp, -[[#%u,OFFSET:]], debug-location !{{[0-9]+}} :: (store unknown-size into %stack.0, align 16)
 # CHECK-DAG: DBG_VALUE $fp, 0, !{{[0-9]+}}, !DIExpression(DW_OP_constu, [[#mul(OFFSET,8)]], DW_OP_bregx, 46, 0, DW_OP_mul, DW_OP_minus),
 #
 # TODO: When LiveDebugValues pass supports reloads for AArch64, it should
 # correctly recognize debug-value !27 is in $z1 after the following reload:
 #
 # CHECK: renamable $z1 = LD1W_IMM renamable $p0, $fp, -[[#OFFSET]], debug-location !34 :: (load unknown-size from %stack.0, align 16)
 # CHECK-DAG: ST1W_IMM killed renamable $z3, killed renamable $p0, $fp, -[[#OFFSET]] :: (store unknown-size into %stack.0, align 16)
 # CHECK-DAG: DBG_VALUE $noreg, $noreg, !27, !DIExpression(), debug-location !30

 --- |
   ; ModuleID = 't.c'
   source_filename = "t.c"
   target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
   target triple = "aarch64-unknown-linux-gnu"

   ; Function Attrs: nounwind
   define dso_local <vscale x 8 x i32> @foo(<vscale x 4 x i32> %z0, <vscale x 4 x i32> %z1, i32 %c) local_unnamed_addr #0 !dbg !11 {
   entry:
     call void @llvm.dbg.value(metadata <vscale x 4 x i32> %z0, metadata !27, metadata !DIExpression()), !dbg !30
     call void @llvm.dbg.value(metadata <vscale x 4 x i32> %z1, metadata !28, metadata !DIExpression()), !dbg !30
     call void @llvm.dbg.value(metadata i32 %c, metadata !29, metadata !DIExpression()), !dbg !30
     %tobool.not = icmp eq i32 %c, 0, !dbg !31
     br i1 %tobool.not, label %if.end, label %if.then, !dbg !33

   if.then:                                          ; preds = %entry
     %call = call <vscale x 8 x i32> @bar(<vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0) #0, !dbg !34
     br label %return, !dbg !35

   if.end:                                           ; preds = %entry
     %0 = call <vscale x 8 x i32> @llvm.aarch64.sve.tuple.create2.nxv8i32.nxv4i32(<vscale x 4 x i32> %z1, <vscale x 4 x i32> %z0), !dbg !36
     br label %return, !dbg !37

   return:                                           ; preds = %if.end, %if.then
     %retval.0 = phi <vscale x 8 x i32> [ %call, %if.then ], [ %0, %if.end ], !dbg !30
     ret <vscale x 8 x i32> %retval.0, !dbg !38
   }

   declare !dbg !39 dso_local <vscale x 8 x i32> @bar(<vscale x 4 x i32>, <vscale x 4 x i32>, <vscale x 4 x i32>, <vscale x 4 x i32>, <vscale x 4 x i32>, <vscale x 4 x i32>, <vscale x 4 x i32>, <vscale x 4 x i32>, <vscale x 4 x i32>) local_unnamed_addr

   ; Function Attrs: nounwind readonly
   declare <vscale x 8 x i32> @llvm.aarch64.sve.tuple.create2.nxv8i32.nxv4i32(<vscale x 4 x i32>, <vscale x 4 x i32>)

   ; Function Attrs: nounwind readnone speculatable willreturn
   declare void @llvm.dbg.value(metadata, metadata, metadata) #1

   attributes #0 = { "frame-pointer"="non-leaf"}
   attributes #1 = { readnone speculatable willreturn }

   !llvm.dbg.cu = !{!0}
   !llvm.module.flags = !{!3, !4, !5, !6, !7, !8, !9}
   !llvm.ident = !{!10}

   !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0 (https://github.com/llvm/llvm-project.git b19275ba870a06c5ef0428af6264ffd28c7cde9e)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
   !1 = !DIFile(filename: "t.c", directory: "/tmp/")
   !2 = !{}
   !3 = !{i32 7, !"Dwarf Version", i32 4}
   !4 = !{i32 2, !"Debug Info Version", i32 3}
   !5 = !{i32 1, !"wchar_size", i32 4}
   !6 = !{i32 1, !"branch-target-enforcement", i32 0}
   !7 = !{i32 1, !"sign-return-address", i32 0}
   !8 = !{i32 1, !"sign-return-address-all", i32 0}
   !9 = !{i32 1, !"sign-return-address-with-bkey", i32 0}
   !10 = !{!"clang version 12.0.0 (https://github.com/llvm/llvm-project.git b19275ba870a06c5ef0428af6264ffd28c7cde9e)"}
   !11 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 6, type: !12, scopeLine: 6, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !26)
   !12 = !DISubroutineType(types: !13)
   !13 = !{!14, !21, !21, !18}
   !14 = !DIDerivedType(tag: DW_TAG_typedef, name: "svint32x2_t", file: !15, line: 59, baseType: !16)
   !15 = !DIFile(filename: "lib/clang/12.0.0/include/arm_sve.h", directory: "/tmp")
   !16 = !DIDerivedType(tag: DW_TAG_typedef, name: "__clang_svint32x2_t", file: !1, baseType: !17)
   !17 = !DICompositeType(tag: DW_TAG_array_type, baseType: !18, flags: DIFlagVector, elements: !19)
   !18 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
   !19 = !{!20}
   !20 = !DISubrange(lowerBound: 0, upperBound: !DIExpression(DW_OP_constu, 4, DW_OP_bregx, 46, 0, DW_OP_mul, DW_OP_constu, 1, DW_OP_minus))
   !21 = !DIDerivedType(tag: DW_TAG_typedef, name: "svint32_t", file: !15, line: 34, baseType: !22)
   !22 = !DIDerivedType(tag: DW_TAG_typedef, name: "__SVInt32_t", file: !1, baseType: !23)
   !23 = !DICompositeType(tag: DW_TAG_array_type, baseType: !18, flags: DIFlagVector, elements: !24)
   !24 = !{!25}
   !25 = !DISubrange(lowerBound: 0, upperBound: !DIExpression(DW_OP_constu, 2, DW_OP_bregx, 46, 0, DW_OP_mul, DW_OP_constu, 1, DW_OP_minus))
   !26 = !{!27, !28, !29}
   !27 = !DILocalVariable(name: "z0", arg: 1, scope: !11, file: !1, line: 6, type: !21)
   !28 = !DILocalVariable(name: "z1", arg: 2, scope: !11, file: !1, line: 6, type: !21)
   !29 = !DILocalVariable(name: "c", arg: 3, scope: !11, file: !1, line: 6, type: !18)
   !30 = !DILocation(line: 0, scope: !11)
   !31 = !DILocation(line: 7, column: 7, scope: !32)
   !32 = distinct !DILexicalBlock(scope: !11, file: !1, line: 7, column: 7)
   !33 = !DILocation(line: 7, column: 7, scope: !11)
   !34 = !DILocation(line: 8, column: 12, scope: !32)
   !35 = !DILocation(line: 8, column: 5, scope: !32)
   !36 = !DILocation(line: 9, column: 10, scope: !11)
   !37 = !DILocation(line: 9, column: 3, scope: !11)
   !38 = !DILocation(line: 10, column: 1, scope: !11)
   !39 = !DISubprogram(name: "bar", scope: !1, file: !1, line: 3, type: !40, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
   !40 = !DISubroutineType(types: !41)
   !41 = !{!17, !23, !23, !23, !23, !23, !23, !23, !23, !23}

 ...
 ---
 name:            foo
 alignment:       4
 tracksRegLiveness: true
 liveins:
   - { reg: '$z0' }
   - { reg: '$z1' }
   - { reg: '$w0' }
 frameInfo:
   maxAlignment:    16
   adjustsStack:    true
   hasCalls:        true
   maxCallFrameSize: 0
   savePoint:       '%bb.1'
   restorePoint:    '%bb.1'
 stack:
   - { id: 0, size: 16, alignment: 16, stack-id: scalable-vector }
 machineFunctionInfo: {}
 body:             |
   bb.0.entry:
     successors: %bb.2(0x30000000), %bb.1(0x50000000)
     liveins: $w0, $z0, $z1

     DBG_VALUE $z0, $noreg, !27, !DIExpression(), debug-location !30
     DBG_VALUE $z1, $noreg, !28, !DIExpression(), debug-location !30
     DBG_VALUE $w0, $noreg, !29, !DIExpression(), debug-location !30
     renamable $z2 = COPY $z1
     renamable $z1 = COPY $z0
     DBG_VALUE $w0, $noreg, !29, !DIExpression(), debug-location !30
     DBG_VALUE $z2, $noreg, !28, !DIExpression(), debug-location !30
     DBG_VALUE $z1, $noreg, !27, !DIExpression(), debug-location !30
     CBZW killed renamable $w0, %bb.2, debug-location !33
     B %bb.1, debug-location !33

   bb.1.if.then:
     liveins: $z1

     ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp, debug-location !34
     renamable $p0 = PTRUE_S 31, debug-location !34
     $x0 = ADDXri %stack.0, 0, 0, debug-location !34
     ST1W_IMM renamable $z1, killed renamable $p0, %stack.0, 0, debug-location !34 :: (store unknown-size into %stack.0, align 16)
     $z0 = COPY renamable $z1, debug-location !34
     $z2 = COPY renamable $z1, debug-location !34
     $z3 = COPY renamable $z1, debug-location !34
     $z4 = COPY renamable $z1, debug-location !34
     $z5 = COPY renamable $z1, debug-location !34
     $z6 = COPY renamable $z1, debug-location !34
     $z7 = COPY renamable $z1, debug-location !34
     BL @bar, csr_aarch64_sve_aapcs, implicit-def dead $lr, implicit $sp, implicit $z0, implicit $z1, implicit $z2, implicit $z3, implicit $z4, implicit $z5, implicit $z6, implicit $z7, implicit $x0, implicit-def $sp, implicit-def $z0, implicit-def $z1, debug-location !34
     ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp, debug-location !34
     renamable $p0 = PTRUE_S 31, debug-location !34
     $z3 = IMPLICIT_DEF
     renamable $z1 = LD1W_IMM renamable $p0, %stack.0, 0, debug-location !34 :: (load unknown-size from %stack.0, align 16)
     ST1W_IMM renamable $z3, killed renamable $p0, %stack.0, 0 :: (store unknown-size into %stack.0, align 16)
     renamable $z2 = COPY $z0, debug-location !34
     B %bb.3, debug-location !35

   bb.2.if.end:
     liveins: $z1, $z2


   bb.3.return:
     liveins: $z1, $z2

     $z0 = COPY killed renamable $z2, debug-location !38
     RET_ReallyLR implicit $z0, implicit $z1, debug-location !38

 ...
	# RUN: llc -start-before=prologepilog -stop-after=livedebugvalues -mattr=+sve -o - %s \| FileCheck %s
	# RUN: llc -start-before=prologepilog -stop-after=livedebugvalues -experimental-debug-variable-locations -mattr=+sve -o - %s \| FileCheck %s
	#
	# Test that the LiveDebugValues pass can correctly handle the address
	# of the SVE spill (at a scalable address location) which is expressed
	# with a complex DIExpression.
	#
	# CHECK: $z2 = ORR_ZZZ killed $z1, $z1
	# CHECK: $z1 = ORR_ZZZ killed $z0, $z0
	# CHECK-DAG: ST1W_IMM renamable $z1, killed renamable $p{{[0-9]+}}, $fp, -[[#%u,OFFSET:]], debug-location !{{[0-9]+}} :: (store unknown-size into %stack.0, align 16)
	# CHECK-DAG: DBG_VALUE $fp, 0, !{{[0-9]+}}, !DIExpression(DW_OP_constu, [[#mul(OFFSET,8)]], DW_OP_bregx, 46, 0, DW_OP_mul, DW_OP_minus),
	#
	# TODO: When LiveDebugValues pass supports reloads for AArch64, it should
	# correctly recognize debug-value !27 is in $z1 after the following reload:
	#
	# CHECK: renamable $z1 = LD1W_IMM renamable $p0, $fp, -[[#OFFSET]], debug-location !34 :: (load unknown-size from %stack.0, align 16)
	# CHECK-DAG: ST1W_IMM killed renamable $z3, killed renamable $p0, $fp, -[[#OFFSET]] :: (store unknown-size into %stack.0, align 16)
	# CHECK-DAG: DBG_VALUE $noreg, $noreg, !27, !DIExpression(), debug-location !30

	--- \|
	; ModuleID = 't.c'
	source_filename = "t.c"
	target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
	target triple = "aarch64-unknown-linux-gnu"

	; Function Attrs: nounwind
	define dso_local <vscale x 8 x i32> @foo(<vscale x 4 x i32> %z0, <vscale x 4 x i32> %z1, i32 %c) local_unnamed_addr #0 !dbg !11 {
	entry:
	call void @llvm.dbg.value(metadata <vscale x 4 x i32> %z0, metadata !27, metadata !DIExpression()), !dbg !30
	call void @llvm.dbg.value(metadata <vscale x 4 x i32> %z1, metadata !28, metadata !DIExpression()), !dbg !30
	call void @llvm.dbg.value(metadata i32 %c, metadata !29, metadata !DIExpression()), !dbg !30
	%tobool.not = icmp eq i32 %c, 0, !dbg !31
	br i1 %tobool.not, label %if.end, label %if.then, !dbg !33

	if.then: ; preds = %entry
	%call = call <vscale x 8 x i32> @bar(<vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0, <vscale x 4 x i32> %z0) #0, !dbg !34
	br label %return, !dbg !35

	if.end: ; preds = %entry
	%0 = call <vscale x 8 x i32> @llvm.aarch64.sve.tuple.create2.nxv8i32.nxv4i32(<vscale x 4 x i32> %z1, <vscale x 4 x i32> %z0), !dbg !36
	br label %return, !dbg !37

	return: ; preds = %if.end, %if.then
	%retval.0 = phi <vscale x 8 x i32> [ %call, %if.then ], [ %0, %if.end ], !dbg !30
	ret <vscale x 8 x i32> %retval.0, !dbg !38
	}

	declare !dbg !39 dso_local <vscale x 8 x i32> @bar(<vscale x 4 x i32>, <vscale x 4 x i32>, <vscale x 4 x i32>, <vscale x 4 x i32>, <vscale x 4 x i32>, <vscale x 4 x i32>, <vscale x 4 x i32>, <vscale x 4 x i32>, <vscale x 4 x i32>) local_unnamed_addr

	; Function Attrs: nounwind readonly
	declare <vscale x 8 x i32> @llvm.aarch64.sve.tuple.create2.nxv8i32.nxv4i32(<vscale x 4 x i32>, <vscale x 4 x i32>)

	; Function Attrs: nounwind readnone speculatable willreturn
	declare void @llvm.dbg.value(metadata, metadata, metadata) #1

	attributes #0 = { "frame-pointer"="non-leaf"}
	attributes #1 = { readnone speculatable willreturn }

	!llvm.dbg.cu = !{!0}
	!llvm.module.flags = !{!3, !4, !5, !6, !7, !8, !9}
	!llvm.ident = !{!10}

	!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 12.0.0 (https://github.com/llvm/llvm-project.git b19275ba870a06c5ef0428af6264ffd28c7cde9e)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)
	!1 = !DIFile(filename: "t.c", directory: "/tmp/")
	!2 = !{}
	!3 = !{i32 7, !"Dwarf Version", i32 4}
	!4 = !{i32 2, !"Debug Info Version", i32 3}
	!5 = !{i32 1, !"wchar_size", i32 4}
	!6 = !{i32 1, !"branch-target-enforcement", i32 0}
	!7 = !{i32 1, !"sign-return-address", i32 0}
	!8 = !{i32 1, !"sign-return-address-all", i32 0}
	!9 = !{i32 1, !"sign-return-address-with-bkey", i32 0}
	!10 = !{!"clang version 12.0.0 (https://github.com/llvm/llvm-project.git b19275ba870a06c5ef0428af6264ffd28c7cde9e)"}
	!11 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 6, type: !12, scopeLine: 6, flags: DIFlagPrototyped \| DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition \| DISPFlagOptimized, unit: !0, retainedNodes: !26)
	!12 = !DISubroutineType(types: !13)
	!13 = !{!14, !21, !21, !18}
	!14 = !DIDerivedType(tag: DW_TAG_typedef, name: "svint32x2_t", file: !15, line: 59, baseType: !16)
	!15 = !DIFile(filename: "lib/clang/12.0.0/include/arm_sve.h", directory: "/tmp")
	!16 = !DIDerivedType(tag: DW_TAG_typedef, name: "__clang_svint32x2_t", file: !1, baseType: !17)
	!17 = !DICompositeType(tag: DW_TAG_array_type, baseType: !18, flags: DIFlagVector, elements: !19)
	!18 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
	!19 = !{!20}
	!20 = !DISubrange(lowerBound: 0, upperBound: !DIExpression(DW_OP_constu, 4, DW_OP_bregx, 46, 0, DW_OP_mul, DW_OP_constu, 1, DW_OP_minus))
	!21 = !DIDerivedType(tag: DW_TAG_typedef, name: "svint32_t", file: !15, line: 34, baseType: !22)
	!22 = !DIDerivedType(tag: DW_TAG_typedef, name: "__SVInt32_t", file: !1, baseType: !23)
	!23 = !DICompositeType(tag: DW_TAG_array_type, baseType: !18, flags: DIFlagVector, elements: !24)
	!24 = !{!25}
	!25 = !DISubrange(lowerBound: 0, upperBound: !DIExpression(DW_OP_constu, 2, DW_OP_bregx, 46, 0, DW_OP_mul, DW_OP_constu, 1, DW_OP_minus))
	!26 = !{!27, !28, !29}
	!27 = !DILocalVariable(name: "z0", arg: 1, scope: !11, file: !1, line: 6, type: !21)
	!28 = !DILocalVariable(name: "z1", arg: 2, scope: !11, file: !1, line: 6, type: !21)
	!29 = !DILocalVariable(name: "c", arg: 3, scope: !11, file: !1, line: 6, type: !18)
	!30 = !DILocation(line: 0, scope: !11)
	!31 = !DILocation(line: 7, column: 7, scope: !32)
	!32 = distinct !DILexicalBlock(scope: !11, file: !1, line: 7, column: 7)
	!33 = !DILocation(line: 7, column: 7, scope: !11)
	!34 = !DILocation(line: 8, column: 12, scope: !32)
	!35 = !DILocation(line: 8, column: 5, scope: !32)
	!36 = !DILocation(line: 9, column: 10, scope: !11)
	!37 = !DILocation(line: 9, column: 3, scope: !11)
	!38 = !DILocation(line: 10, column: 1, scope: !11)
	!39 = !DISubprogram(name: "bar", scope: !1, file: !1, line: 3, type: !40, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
	!40 = !DISubroutineType(types: !41)
	!41 = !{!17, !23, !23, !23, !23, !23, !23, !23, !23, !23}

	...
	---
	name: foo
	alignment: 4
	tracksRegLiveness: true
	liveins:
	- { reg: '$z0' }
	- { reg: '$z1' }
	- { reg: '$w0' }
	frameInfo:
	maxAlignment: 16
	adjustsStack: true
	hasCalls: true
	maxCallFrameSize: 0
	savePoint: '%bb.1'
	restorePoint: '%bb.1'
	stack:
	- { id: 0, size: 16, alignment: 16, stack-id: scalable-vector }
	machineFunctionInfo: {}
	body: \|
	bb.0.entry:
	successors: %bb.2(0x30000000), %bb.1(0x50000000)
	liveins: $w0, $z0, $z1

	DBG_VALUE $z0, $noreg, !27, !DIExpression(), debug-location !30
	DBG_VALUE $z1, $noreg, !28, !DIExpression(), debug-location !30
	DBG_VALUE $w0, $noreg, !29, !DIExpression(), debug-location !30
	renamable $z2 = COPY $z1
	renamable $z1 = COPY $z0
	DBG_VALUE $w0, $noreg, !29, !DIExpression(), debug-location !30
	DBG_VALUE $z2, $noreg, !28, !DIExpression(), debug-location !30
	DBG_VALUE $z1, $noreg, !27, !DIExpression(), debug-location !30
	CBZW killed renamable $w0, %bb.2, debug-location !33
	B %bb.1, debug-location !33

	bb.1.if.then:
	liveins: $z1

	ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp, debug-location !34
	renamable $p0 = PTRUE_S 31, debug-location !34
	$x0 = ADDXri %stack.0, 0, 0, debug-location !34
	ST1W_IMM renamable $z1, killed renamable $p0, %stack.0, 0, debug-location !34 :: (store unknown-size into %stack.0, align 16)
	$z0 = COPY renamable $z1, debug-location !34
	$z2 = COPY renamable $z1, debug-location !34
	$z3 = COPY renamable $z1, debug-location !34
	$z4 = COPY renamable $z1, debug-location !34
	$z5 = COPY renamable $z1, debug-location !34
	$z6 = COPY renamable $z1, debug-location !34
	$z7 = COPY renamable $z1, debug-location !34
	BL @bar, csr_aarch64_sve_aapcs, implicit-def dead $lr, implicit $sp, implicit $z0, implicit $z1, implicit $z2, implicit $z3, implicit $z4, implicit $z5, implicit $z6, implicit $z7, implicit $x0, implicit-def $sp, implicit-def $z0, implicit-def $z1, debug-location !34
	ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp, debug-location !34
	renamable $p0 = PTRUE_S 31, debug-location !34
	$z3 = IMPLICIT_DEF
	renamable $z1 = LD1W_IMM renamable $p0, %stack.0, 0, debug-location !34 :: (load unknown-size from %stack.0, align 16)
	ST1W_IMM renamable $z3, killed renamable $p0, %stack.0, 0 :: (store unknown-size into %stack.0, align 16)
	renamable $z2 = COPY $z0, debug-location !34
	B %bb.3, debug-location !35

	bb.2.if.end:
	liveins: $z1, $z2


	bb.3.return:
	liveins: $z1, $z2

	$z0 = COPY killed renamable $z2, debug-location !38
	RET_ReallyLR implicit $z0, implicit $z1, debug-location !38

	...