d391e4fe84
Be more consistent in the naming convention for the various RET instructions to specify in terms of bitwidth. Helps prevent future scheduler model mismatches like those that were only addressed in D44687. Differential Revision: https://reviews.llvm.org/D113302
129 lines
4.9 KiB
YAML
129 lines
4.9 KiB
YAML
# RUN: llc %s -o - -run-pass=livedebugvalues \
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# RUN: -experimental-debug-variable-locations \
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# RUN: | FileCheck %s
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#
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# This test used to cause an infinite loop in InstrRefBasedLDV. Observe block
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# five: on the first entry the desired variable value is in $rdx and $rcx, on
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# both paths to the block. However, the block rotates values between those
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# registers, and feeds a zero-value in too. Ultimately, there is no correct
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# location for the variable in that block.
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# This caused an infinite loop in a previous implementation of LiveDebugValues.
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# Keep this around as a regression test, and check that no location is picked
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# in block 5.
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#
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# CHECK-LABEL: bb.3:
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# CHECK: DBG_INSTR_REF 7, 0
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# CHECK-NEXT: DBG_VALUE $rdx
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# CHECK-NEXT: $rcx = MOV64rr $rdx
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# CHECK-LABEL: bb.4:
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# CHECK: DBG_VALUE $rcx
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# CHECK-NEXT: $rdx = MOV64rr killed $rcx
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# CHECK-LABEL: bb.5:
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# CHEKC-NOT: DBG_VALUE
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--- |
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: nofree norecurse nosync nounwind readonly uwtable
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define dso_local void @bees() local_unnamed_addr !dbg !13 {
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entry:
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ret void, !dbg !22
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}
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; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!8, !9, !10, !11}
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!llvm.ident = !{!12}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "xmlNormalizeURIPath_path", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 10.0 (git@github.com:llvm/llvm-project 9d8de79d09c9560c094d90b010e8315fe2712ec2)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, splitDebugInlining: false, nameTableKind: None)
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!3 = !DIFile(filename: "test4.c", directory: "/tmp")
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!4 = !{}
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!5 = !{!0}
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!6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64)
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!7 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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!8 = !{i32 7, !"Dwarf Version", i32 4}
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!9 = !{i32 2, !"Debug Info Version", i32 3}
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!10 = !{i32 1, !"wchar_size", i32 4}
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!11 = !{i32 7, !"uwtable", i32 1}
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!12 = !{!"clang version 10.0 (git@github.com:llvm/llvm-project 9d8de79d09c9560c094d90b010e8315fe2712ec2)"}
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!13 = distinct !DISubprogram(name: "xmlNormalizeURIPath", scope: !3, file: !3, line: 2, type: !14, scopeLine: 2, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !16)
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!14 = !DISubroutineType(types: !15)
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!15 = !{null}
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!16 = !{!17, !18}
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!17 = !DILocalVariable(name: "cur", scope: !13, file: !3, line: 3, type: !6)
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!18 = !DILocalVariable(name: "segp", scope: !19, file: !3, line: 5, type: !6)
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!19 = distinct !DILexicalBlock(scope: !13, file: !3, line: 4, column: 13)
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!20 = !DILocation(line: 4, column: 3, scope: !13)
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!21 = !DILocation(line: 0, scope: !13)
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!22 = !DILocation(line: 0, scope: !19)
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!23 = !DILocation(line: 6, column: 5, scope: !19)
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!24 = !DILocation(line: 6, column: 12, scope: !19)
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!25 = !{!26, !26, i64 0}
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!26 = !{!"omnipotent char", !27, i64 0}
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!27 = !{!"Simple C/C++ TBAA"}
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!28 = !DILocation(line: 6, column: 27, scope: !19)
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!29 = !DILocation(line: 7, column: 7, scope: !19)
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!30 = distinct !{!30, !23, !31, !32, !33}
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!31 = !DILocation(line: 7, column: 9, scope: !19)
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!32 = !{!"llvm.loop.mustprogress"}
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!33 = !{!"llvm.loop.unroll.disable"}
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...
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---
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name: bees
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alignment: 16
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tracksRegLiveness: true
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frameInfo:
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maxAlignment: 1
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maxCallFrameSize: 0
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machineFunctionInfo: {}
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body: |
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bb.0:
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$rdx = MOV64ri 0, implicit-def $eflags
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$esi = MOV32ri 0, implicit-def $eflags
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bb.1:
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successors: %bb.2(0x03e0f83e), %bb.1(0x7c1f07c2)
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liveins: $rcx, $rdi, $rdx, $eflags
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DBG_PHI $rcx, 2
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DBG_INSTR_REF 2, 0, !18, !DIExpression(), debug-location !22
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JCC_1 %bb.1, 4, implicit $eflags, debug-location !22
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bb.2:
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successors: %bb.4(0x30000000), %bb.3(0x50000000)
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liveins: $rcx, $rdi, $eflags
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JCC_1 %bb.4, 4, implicit $eflags, debug-location !22
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bb.3:
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successors: %bb.5(0x04000000)
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liveins: $rcx, $rdi, $eflags
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$rdx = MOV64ri 0, debug-instr-number 7, debug-location !22
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DBG_INSTR_REF 7, 0, !18, !DIExpression(), debug-location !22
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$rcx = MOV64rr $rdx
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JMP_1 %bb.5, debug-location !22
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bb.4:
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liveins: $rcx, $rdi, $eflags
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$rdx = MOV64rr killed $rcx, debug-location !22
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bb.5:
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successors: %bb.5(0x7c000000), %bb.6(0x04000000)
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liveins: $rdi, $rdx, $eflags
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$rcx = MOV64rr $rdx, debug-location !22
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$rdx = MOV64ri 0 ; jmorse -- disabling this makes variable live-through
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JCC_1 %bb.5, 6, implicit $eflags, debug-location !22
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bb.6:
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RET64 debug-location !22
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...
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