1# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py 2# RUN: llc -run-pass=prologepilog -o - %s | FileCheck %s 3 4# Test that the presence of debug instructions doesn't trigger arbitrary registers that are unused to be zeroed out. 5 6--- | 7 ; ModuleID = 'zero-call-used-regs-debug-info.ll' 8 source_filename = "zero-call-used-regs-debug-info.c" 9 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 10 target triple = "x86_64-unknown-linux-gnu" 11 12 @b = dso_local local_unnamed_addr global i32 0, align 4, !dbg !0 13 @a = dso_local local_unnamed_addr global [1 x i8] zeroinitializer, align 1, !dbg !5 14 15 ; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable 16 define dso_local signext i8 @c(i32 noundef %d) local_unnamed_addr #0 !dbg !19 { 17 entry: 18 call void @llvm.dbg.value(metadata i32 %d, metadata !23, metadata !DIExpression()), !dbg !26 19 call void @llvm.dbg.value(metadata i32 %d, metadata !24, metadata !DIExpression()), !dbg !27 20 %0 = load i32, ptr @b, align 4, !dbg !28, !tbaa !29 21 %conv = trunc i32 %0 to i8, !dbg !33 22 store i8 %conv, ptr @a, align 1, !dbg !34, !tbaa !35 23 ret i8 undef, !dbg !36 24 } 25 26 ; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none) 27 declare void @llvm.dbg.value(metadata, metadata, metadata) #2 28 29 attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" "zero-call-used-regs"="used" } 30 attributes #1 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" } 31 attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) } 32 33 !llvm.dbg.cu = !{!2} 34 !llvm.module.flags = !{!12, !13, !14, !15, !16, !17} 35 !llvm.ident = !{!18} 36 37 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 38 !1 = distinct !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 2, type: !11, isLocal: false, isDefinition: true) 39 !2 = distinct !DICompileUnit(language: DW_LANG_C11, file: !3, producer: "clang version 16.0.0 (https://github.com/llvm/llvm-project.git ba5acedd979aa94a81be555e0add8e4421499d4f)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, globals: !4, splitDebugInlining: false, nameTableKind: None) 40 !3 = !DIFile(filename: "zero-call-used-regs-debug-info.c", directory: "/home/xgupta/compiler/llvm-project/build/bin", checksumkind: CSK_MD5, checksum: "fe3a5f45289411a008e07c7debb490ca") 41 !4 = !{!5, !0} 42 !5 = !DIGlobalVariableExpression(var: !6, expr: !DIExpression()) 43 !6 = distinct !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 1, type: !7, isLocal: false, isDefinition: true) 44 !7 = !DICompositeType(tag: DW_TAG_array_type, baseType: !8, size: 8, elements: !9) 45 !8 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char) 46 !9 = !{!10} 47 !10 = !DISubrange(count: 1) 48 !11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 49 !12 = !{i32 7, !"Dwarf Version", i32 5} 50 !13 = !{i32 2, !"Debug Info Version", i32 3} 51 !14 = !{i32 1, !"wchar_size", i32 4} 52 !15 = !{i32 8, !"PIC Level", i32 2} 53 !16 = !{i32 7, !"PIE Level", i32 2} 54 !17 = !{i32 7, !"uwtable", i32 2} 55 !18 = !{!"clang version 16.0.0 (https://github.com/llvm/llvm-project.git ba5acedd979aa94a81be555e0add8e4421499d4f)"} 56 !19 = distinct !DISubprogram(name: "c", scope: !3, file: !3, line: 3, type: !20, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !22) 57 !20 = !DISubroutineType(types: !21) 58 !21 = !{!8, !11} 59 !22 = !{!23, !24} 60 !23 = !DILocalVariable(name: "d", arg: 1, scope: !19, file: !3, line: 3, type: !11) 61 !24 = !DILocalVariable(name: "e", scope: !25, file: !3, line: 5, type: !11) 62 !25 = distinct !DILexicalBlock(scope: !19, file: !3, line: 4, column: 9) 63 !26 = !DILocation(line: 0, scope: !19) 64 !27 = !DILocation(line: 0, scope: !25) 65 !28 = !DILocation(line: 6, column: 5, scope: !25) 66 !29 = !{!30, !30, i64 0} 67 !30 = !{!"int", !31, i64 0} 68 !31 = !{!"omnipotent char", !32, i64 0} 69 !32 = !{!"Simple C/C++ TBAA"} 70 !33 = !DILocation(line: 4, column: 8, scope: !19) 71 !34 = !DILocation(line: 4, column: 6, scope: !19) 72 !35 = !{!31, !31, i64 0} 73 !36 = !DILocation(line: 8, column: 1, scope: !19) 74 !37 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 9, type: !38, scopeLine: 9, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !40) 75 !38 = !DISubroutineType(types: !39) 76 !39 = !{null} 77 !40 = !{} 78 !41 = !DILocation(line: 9, column: 14, scope: !37) 79 80... 81--- 82name: c 83alignment: 16 84exposesReturnsTwice: false 85legalized: false 86regBankSelected: false 87selected: false 88failedISel: false 89tracksRegLiveness: true 90hasWinCFI: false 91callsEHReturn: false 92callsUnwindInit: false 93hasEHCatchret: false 94hasEHScopes: false 95hasEHFunclets: false 96debugInstrRef: true 97failsVerification: false 98tracksDebugUserValues: true 99registers: [] 100liveins: [] 101frameInfo: 102 isFrameAddressTaken: false 103 isReturnAddressTaken: false 104 hasStackMap: false 105 hasPatchPoint: false 106 stackSize: 0 107 offsetAdjustment: 0 108 maxAlignment: 1 109 adjustsStack: false 110 hasCalls: false 111 stackProtector: '' 112 functionContext: '' 113 maxCallFrameSize: 4294967295 114 cvBytesOfCalleeSavedRegisters: 0 115 hasOpaqueSPAdjustment: false 116 hasVAStart: false 117 hasMustTailInVarArgFunc: false 118 hasTailCall: false 119 localFrameSize: 0 120 savePoint: '' 121 restorePoint: '' 122fixedStack: [] 123stack: [] 124callSites: [] 125debugValueSubstitutions: [] 126constants: [] 127machineFunctionInfo: {} 128body: | 129 bb.0.entry: 130 ; CHECK-LABEL: name: c 131 ; CHECK: DBG_VALUE $edi, $noreg, !23, !DIExpression(), debug-location !26 132 ; CHECK-NEXT: DBG_VALUE $edi, $noreg, !24, !DIExpression(), debug-location !27 133 ; CHECK-NEXT: renamable $al = MOV8rm $rip, 1, $noreg, @b, $noreg, debug-location !28 :: (dereferenceable load (s8) from @b, align 4, !tbaa !29) 134 ; CHECK-NEXT: MOV8mr $rip, 1, $noreg, @a, $noreg, killed renamable $al, debug-location !34 :: (store (s8) into @a, !tbaa !35) 135 ; CHECK-NEXT: RET 0, undef $al, debug-location !36 136 DBG_VALUE $edi, $noreg, !23, !DIExpression(), debug-location !26 137 DBG_VALUE $edi, $noreg, !24, !DIExpression(), debug-location !27 138 renamable $al = MOV8rm $rip, 1, $noreg, @b, $noreg, debug-location !28 :: (dereferenceable load (s8) from @b, align 4, !tbaa !29) 139 MOV8mr $rip, 1, $noreg, @a, $noreg, killed renamable $al, debug-location !34 :: (store (s8) into @a, !tbaa !35) 140 RET 0, undef $al, debug-location !36 141 142... 143