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1# RUN: llc %s -o - -run-pass=livedebugvalues \2# RUN: -experimental-debug-variable-locations \3# RUN: | FileCheck %s4#5## Copy of DebugInfo/COFF/types-array-advanced.ll, altered to test its behaviour6## in MIR when fed to LiveDebugValues. The matter of interest is that on win32,7## calls to _chkstk will modify $esp, where we would normally ignore defs of the8## stack pointer on calls.9##10## Check that on win32, for this specific symbol, when the stack is adjusted,11## that we track the modified $esp from _chkstk like any other value in12## LiveDebugValues, where it can be recovered after a clobber or moved around.13## Check lines written inline.14--- |15 target datalayout = "e-m:x-p:32:32-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:32-n8:16:32-a:0:32-S32"16 target triple = "i686-pc-windows-msvc18.0.31101"17 18 %struct.incomplete_struct = type { i32 }19 20 @"\01?multi_dim_arr@@3PAY146DA" = global [2 x [5 x [7 x i8]]] zeroinitializer, align 1, !dbg !021 @"\01?p_incomplete_struct_arr@@3PAY02Uincomplete_struct@@A" = global ptr null, align 4, !dbg !622 @"\01?incomplete_struct_arr@@3PAUincomplete_struct@@A" = global [3 x %struct.incomplete_struct] zeroinitializer, align 4, !dbg !1623 @"\01?typedef_arr@@3SDHD" = constant [4 x i32] zeroinitializer, align 4, !dbg !1824 25 define void @"\01?foo@@YAXH@Z"(i32 %x) !dbg !35 {26 entry:27 %x.addr = alloca i32, align 428 %saved_stack = alloca ptr, align 429 store i32 %x, ptr %x.addr, align 430 call void @llvm.dbg.declare(metadata ptr %x.addr, metadata !38, metadata !DIExpression()), !dbg !3931 %0 = load i32, ptr %x.addr, align 4, !dbg !4032 %1 = call ptr @llvm.stacksave(), !dbg !4133 store ptr %1, ptr %saved_stack, align 4, !dbg !4134 %vla = alloca i32, i32 %0, align 4, !dbg !4135 call void @llvm.dbg.declare(metadata ptr %vla, metadata !42, metadata !DIExpression(DW_OP_deref)), !dbg !4636 %arrayidx1 = bitcast ptr %vla to ptr, !dbg !4737 store i32 0, ptr %arrayidx1, align 4, !dbg !4838 %2 = load ptr, ptr %saved_stack, align 4, !dbg !4939 call void @llvm.stackrestore(ptr %2), !dbg !4940 ret void, !dbg !4941 }42 43 ; Function Attrs: nofree nosync nounwind readnone speculatable willreturn44 declare void @llvm.dbg.declare(metadata, metadata, metadata)45 46 ; Function Attrs: nofree nosync nounwind willreturn47 declare ptr @llvm.stacksave()48 49 ; Function Attrs: nofree nosync nounwind willreturn50 declare void @llvm.stackrestore(ptr)51 52 !llvm.dbg.cu = !{!2}53 !llvm.module.flags = !{!32, !33}54 !llvm.ident = !{!34}55 56 !0 = distinct !DIGlobalVariableExpression(var: !1, expr: !DIExpression())57 !1 = !DIGlobalVariable(name: "multi_dim_arr", linkageName: "\01?multi_dim_arr@@3PAY146DA", scope: !2, file: !3, line: 1, type: !26, isLocal: false, isDefinition: true)58 !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 3.9.0 (trunk 273874)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)59 !3 = !DIFile(filename: "t.cpp", directory: "/")60 !4 = !{}61 !5 = !{!0, !6, !16, !18}62 !6 = distinct !DIGlobalVariableExpression(var: !7, expr: !DIExpression())63 !7 = !DIGlobalVariable(name: "p_incomplete_struct_arr", linkageName: "\01?p_incomplete_struct_arr@@3PAY02Uincomplete_struct@@A", scope: !2, file: !3, line: 3, type: !8, isLocal: false, isDefinition: true)64 !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 32, align: 32)65 !9 = !DICompositeType(tag: DW_TAG_array_type, baseType: !10, elements: !14)66 !10 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "incomplete_struct", file: !3, line: 4, size: 32, align: 32, elements: !11, identifier: ".?AUincomplete_struct@@")67 !11 = !{!12}68 !12 = !DIDerivedType(tag: DW_TAG_member, name: "s1", scope: !10, file: !3, line: 5, baseType: !13, size: 32, align: 32)69 !13 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)70 !14 = !{!15}71 !15 = !DISubrange(count: 3)72 !16 = distinct !DIGlobalVariableExpression(var: !17, expr: !DIExpression())73 !17 = !DIGlobalVariable(name: "incomplete_struct_arr", linkageName: "\01?incomplete_struct_arr@@3PAUincomplete_struct@@A", scope: !2, file: !3, line: 6, type: !9, isLocal: false, isDefinition: true)74 !18 = distinct !DIGlobalVariableExpression(var: !19, expr: !DIExpression())75 !19 = !DIGlobalVariable(name: "typedef_arr", linkageName: "\01?typedef_arr@@3SDHD", scope: !2, file: !3, line: 14, type: !20, isLocal: false, isDefinition: true)76 !20 = !DICompositeType(tag: DW_TAG_array_type, baseType: !21, size: 128, align: 32, elements: !24)77 !21 = !DIDerivedType(tag: DW_TAG_typedef, name: "T_INT", file: !3, line: 13, baseType: !22)78 !22 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !23)79 !23 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !13)80 !24 = !{!25}81 !25 = !DISubrange(count: 4)82 !26 = !DICompositeType(tag: DW_TAG_array_type, baseType: !27, size: 560, align: 8, elements: !28)83 !27 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)84 !28 = !{!29, !30, !31}85 !29 = !DISubrange(count: 2)86 !30 = !DISubrange(count: 5)87 !31 = !DISubrange(count: 7)88 !32 = !{i32 2, !"CodeView", i32 1}89 !33 = !{i32 2, !"Debug Info Version", i32 3}90 !34 = !{!"clang version 3.9.0 (trunk 273874)"}91 !35 = distinct !DISubprogram(name: "foo", linkageName: "\01?foo@@YAXH@Z", scope: !3, file: !3, line: 8, type: !36, scopeLine: 8, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !4)92 !36 = !DISubroutineType(types: !37)93 !37 = !{null, !13}94 !38 = !DILocalVariable(name: "x", arg: 1, scope: !35, file: !3, line: 8, type: !13)95 !39 = !DILocation(line: 8, column: 14, scope: !35)96 !40 = !DILocation(line: 9, column: 21, scope: !35)97 !41 = !DILocation(line: 9, column: 4, scope: !35)98 !42 = !DILocalVariable(name: "dyn_size_arr", scope: !35, file: !3, line: 9, type: !43)99 !43 = !DICompositeType(tag: DW_TAG_array_type, baseType: !13, align: 32, elements: !44)100 !44 = !{!45}101 !45 = !DISubrange(count: -1)102 !46 = !DILocation(line: 9, column: 8, scope: !35)103 !47 = !DILocation(line: 10, column: 4, scope: !35)104 !48 = !DILocation(line: 10, column: 20, scope: !35)105 !49 = !DILocation(line: 11, column: 1, scope: !35)106 107...108---109name: "\x01?foo@@YAXH@Z"110alignment: 16111tracksRegLiveness: true112debugInstrRef: true113hasWinCFI: true114frameInfo:115 stackSize: 8116 offsetAdjustment: -8117 maxAlignment: 4118 adjustsStack: true119 maxCallFrameSize: 0120fixedStack:121 - { id: 0, type: spill-slot, offset: -8, size: 4, alignment: 4 }122 - { id: 1, size: 4, alignment: 4, debug-info-variable: '!38', debug-info-expression: '!DIExpression()',123 debug-info-location: '!39' }124stack:125 - { id: 1, name: saved_stack, offset: -12, size: 4, alignment: 4 }126 - { id: 2, name: vla, type: variable-sized, offset: -12, alignment: 1 }127machineFunctionInfo: {}128body: |129 bb.0.entry:130 frame-setup PUSH32r killed $ebp, implicit-def $esp, implicit $esp131 CFI_INSTRUCTION def_cfa_offset 8132 CFI_INSTRUCTION offset $ebp, -8133 frame-setup SEH_PushReg 23134 $ebp = frame-setup MOV32rr $esp135 CFI_INSTRUCTION def_cfa_register $ebp136 frame-setup SEH_SetFrame 23, 0137 frame-setup PUSH32r undef $eax, implicit-def $esp, implicit $esp138 frame-setup SEH_StackAlloc 4139 frame-setup SEH_EndPrologue140 renamable $eax = MOV32rm $ebp, 1, $noreg, 8, $noreg, debug-location !40 :: (dereferenceable load (s32) from %ir.x.addr)141 MOV32mr $ebp, 1, $noreg, -4, $noreg, $esp, debug-location !41 :: (store (s32) into %ir.saved_stack)142 renamable $eax = SHL32ri killed renamable $eax, 2, implicit-def dead $eflags, debug-location !41143 CALLpcrel32 &_chkstk, implicit $esp, implicit $ssp, implicit $eax, implicit $esp, implicit-def dead $eax, implicit-def $esp, implicit-def dead $eflags, debug-instr-number 2, debug-location !41144 $ebx = MOV32rr $esp, debug-location !41145 $eax = MOV32ri 0146 DBG_INSTR_REF !42, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_deref), dbg-instr-ref(2, 6), debug-location !46147 ; CHECK-LABEL: DBG_INSTR_REF {{.+}}, dbg-instr-ref(2, 6)148 ; CHECK: DBG_VALUE_LIST {{.+}}, $esp149 150 ;; Variable value is $esp / $ebx, will be based on $esp initially. We'll now151 ;; allocate more stack space, and several things should happen:152 ;; * We recognise it as modifying $esp, and move the variable location to153 ;; be based on $ebx,154 ;; * We recognise the modified $esp as a new value, and if we assign it to155 ;; the variable location, will base the variable on $esp,156 ;; * Clobbering the second modified $esp won't re-locate the variable to157 ;; $ebx, which comes from the first modified $esp.158 CALLpcrel32 &_chkstk, implicit $esp, implicit $ssp, implicit $eax, implicit $esp, implicit-def dead $eax, implicit-def $esp, implicit-def dead $eflags, debug-instr-number 3, debug-location !41159 ; CHECK-NEXT: CALLpcrel32160 ; CHECK-NEXT: DBG_VALUE_LIST {{.+}}, $ebx161 162 DBG_INSTR_REF !42, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_deref), dbg-instr-ref(3, 6), debug-location !46163 ; CHECK-NEXT: DBG_INSTR_REF {{.+}}, dbg-instr-ref(3, 6)164 ; CHECK-NEXT: DBG_VALUE_LIST {{.+}}, $esp165 166 $esp = ADD32ri killed $esp, 0, implicit-def dead $eflags167 ; CHECK-NEXT: ADD32ri168 169 DBG_INSTR_REF !42, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_deref), dbg-instr-ref(3, 6), debug-location !46170 ; CHECK-NEXT: DBG_INSTR_REF {{.+}}, dbg-instr-ref(3, 6)171 ; CHECK-NEXT: DBG_VALUE_LIST {{.+}}, $noreg172 173 $esp = MOV32rr $ebp, debug-location !49174 $ebp = frame-destroy POP32r implicit-def $esp, implicit $esp, debug-location !49175 RET32 debug-location !49176 177...178