| # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py |
| # RUN: llc -run-pass=prologepilog -o - %s | FileCheck %s |
| |
| # Test that the presence of debug instructions doesn't trigger arbitrary registers that are unused to be zeroed out. |
| |
| --- | |
| ; ModuleID = 'zero-call-used-regs-debug-info.ll' |
| source_filename = "zero-call-used-regs-debug-info.c" |
| target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @b = dso_local local_unnamed_addr global i32 0, align 4, !dbg !0 |
| @a = dso_local local_unnamed_addr global [1 x i8] zeroinitializer, align 1, !dbg !5 |
| |
| ; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable |
| define dso_local signext i8 @c(i32 noundef %d) local_unnamed_addr #0 !dbg !19 { |
| entry: |
| call void @llvm.dbg.value(metadata i32 %d, metadata !23, metadata !DIExpression()), !dbg !26 |
| call void @llvm.dbg.value(metadata i32 %d, metadata !24, metadata !DIExpression()), !dbg !27 |
| %0 = load i32, ptr @b, align 4, !dbg !28, !tbaa !29 |
| %conv = trunc i32 %0 to i8, !dbg !33 |
| store i8 %conv, ptr @a, align 1, !dbg !34, !tbaa !35 |
| ret i8 undef, !dbg !36 |
| } |
| |
| ; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none) |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #2 |
| |
| 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" } |
| 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" } |
| attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) } |
| |
| !llvm.dbg.cu = !{!2} |
| !llvm.module.flags = !{!12, !13, !14, !15, !16, !17} |
| !llvm.ident = !{!18} |
| |
| !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) |
| !1 = distinct !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 2, type: !11, isLocal: false, isDefinition: true) |
| !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) |
| !3 = !DIFile(filename: "zero-call-used-regs-debug-info.c", directory: "/home/xgupta/compiler/llvm-project/build/bin", checksumkind: CSK_MD5, checksum: "fe3a5f45289411a008e07c7debb490ca") |
| !4 = !{!5, !0} |
| !5 = !DIGlobalVariableExpression(var: !6, expr: !DIExpression()) |
| !6 = distinct !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 1, type: !7, isLocal: false, isDefinition: true) |
| !7 = !DICompositeType(tag: DW_TAG_array_type, baseType: !8, size: 8, elements: !9) |
| !8 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char) |
| !9 = !{!10} |
| !10 = !DISubrange(count: 1) |
| !11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !12 = !{i32 7, !"Dwarf Version", i32 5} |
| !13 = !{i32 2, !"Debug Info Version", i32 3} |
| !14 = !{i32 1, !"wchar_size", i32 4} |
| !15 = !{i32 8, !"PIC Level", i32 2} |
| !16 = !{i32 7, !"PIE Level", i32 2} |
| !17 = !{i32 7, !"uwtable", i32 2} |
| !18 = !{!"clang version 16.0.0 (https://github.com/llvm/llvm-project.git ba5acedd979aa94a81be555e0add8e4421499d4f)"} |
| !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) |
| !20 = !DISubroutineType(types: !21) |
| !21 = !{!8, !11} |
| !22 = !{!23, !24} |
| !23 = !DILocalVariable(name: "d", arg: 1, scope: !19, file: !3, line: 3, type: !11) |
| !24 = !DILocalVariable(name: "e", scope: !25, file: !3, line: 5, type: !11) |
| !25 = distinct !DILexicalBlock(scope: !19, file: !3, line: 4, column: 9) |
| !26 = !DILocation(line: 0, scope: !19) |
| !27 = !DILocation(line: 0, scope: !25) |
| !28 = !DILocation(line: 6, column: 5, scope: !25) |
| !29 = !{!30, !30, i64 0} |
| !30 = !{!"int", !31, i64 0} |
| !31 = !{!"omnipotent char", !32, i64 0} |
| !32 = !{!"Simple C/C++ TBAA"} |
| !33 = !DILocation(line: 4, column: 8, scope: !19) |
| !34 = !DILocation(line: 4, column: 6, scope: !19) |
| !35 = !{!31, !31, i64 0} |
| !36 = !DILocation(line: 8, column: 1, scope: !19) |
| !37 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 9, type: !38, scopeLine: 9, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !40) |
| !38 = !DISubroutineType(types: !39) |
| !39 = !{null} |
| !40 = !{} |
| !41 = !DILocation(line: 9, column: 14, scope: !37) |
| |
| ... |
| --- |
| name: c |
| alignment: 16 |
| exposesReturnsTwice: false |
| legalized: false |
| regBankSelected: false |
| selected: false |
| failedISel: false |
| tracksRegLiveness: true |
| hasWinCFI: false |
| callsEHReturn: false |
| callsUnwindInit: false |
| hasEHCatchret: false |
| hasEHScopes: false |
| hasEHFunclets: false |
| debugInstrRef: true |
| failsVerification: false |
| tracksDebugUserValues: true |
| registers: [] |
| liveins: [] |
| frameInfo: |
| isFrameAddressTaken: false |
| isReturnAddressTaken: false |
| hasStackMap: false |
| hasPatchPoint: false |
| stackSize: 0 |
| offsetAdjustment: 0 |
| maxAlignment: 1 |
| adjustsStack: false |
| hasCalls: false |
| stackProtector: '' |
| functionContext: '' |
| maxCallFrameSize: 4294967295 |
| cvBytesOfCalleeSavedRegisters: 0 |
| hasOpaqueSPAdjustment: false |
| hasVAStart: false |
| hasMustTailInVarArgFunc: false |
| hasTailCall: false |
| localFrameSize: 0 |
| savePoint: '' |
| restorePoint: '' |
| fixedStack: [] |
| stack: [] |
| callSites: [] |
| debugValueSubstitutions: [] |
| constants: [] |
| machineFunctionInfo: {} |
| body: | |
| bb.0.entry: |
| ; CHECK-LABEL: name: c |
| ; CHECK: DBG_VALUE $edi, $noreg, !23, !DIExpression(), debug-location !26 |
| ; CHECK-NEXT: DBG_VALUE $edi, $noreg, !24, !DIExpression(), debug-location !27 |
| ; CHECK-NEXT: renamable $al = MOV8rm $rip, 1, $noreg, @b, $noreg, debug-location !28 :: (dereferenceable load (s8) from @b, align 4, !tbaa !29) |
| ; CHECK-NEXT: MOV8mr $rip, 1, $noreg, @a, $noreg, killed renamable $al, debug-location !34 :: (store (s8) into @a, !tbaa !35) |
| ; CHECK-NEXT: RET 0, undef $al, debug-location !36 |
| DBG_VALUE $edi, $noreg, !23, !DIExpression(), debug-location !26 |
| DBG_VALUE $edi, $noreg, !24, !DIExpression(), debug-location !27 |
| renamable $al = MOV8rm $rip, 1, $noreg, @b, $noreg, debug-location !28 :: (dereferenceable load (s8) from @b, align 4, !tbaa !29) |
| MOV8mr $rip, 1, $noreg, @a, $noreg, killed renamable $al, debug-location !34 :: (store (s8) into @a, !tbaa !35) |
| RET 0, undef $al, debug-location !36 |
| |
| ... |
