9811ffe7d0
Revision c383f4d655 enabled using variadic-form debug values to represent
single-location, non-stack-value debug values, and a further patch made all
DBG_INSTR_REFs use variadic form. Not all code paths were updated correctly to
handle the new syntax however, with entry values in still expecting an expression
that begins exactly DW_OP_LLVM_entry_value, 1.
A function already exists to select non-variadic-like expressions; this patch
adds an extra function to cheaply simplify such cases to non-variadic form, which
we use prior to any entry-value processing to put DBG_INSTR_REFs and DBG_VALUEs
down the same code path. We also use it for a few DIExpression functions that
check for whether the first element(s) of a DIExpression match a particular
pattern, so that they will return the same result for
DIExpression(DW_OP_LLVM_arg, 0, <ops>) as for DIExpression(<ops>).
Differential Revision: https://reviews.llvm.org/D158185
83 lines
4.8 KiB
YAML
83 lines
4.8 KiB
YAML
# RUN: llc %s --start-after=livedebugvalues --filetype=obj -o - \
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# RUN: | llvm-dwarfdump - --name=test-var -o - | FileCheck %s
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# Test that when an entry value expression appears in a DBG_VALUE_LIST, we are
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# able to produce a valid entry value location in DWARF.
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# CHECK: DW_OP_entry_value(DW_OP_reg14 R14), DW_OP_plus_uconst 0x10, DW_OP_plus_uconst 0x10, DW_OP_deref
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--- |
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source_filename = "test.ll"
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target datalayout = "e-m:o-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-apple-macosx12.1.0"
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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define swifttailcc void @blah(ptr swiftasync %0) !dbg !15 {
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%use = getelementptr i8, ptr %0, i64 9
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call void @llvm.dbg.value(metadata ptr %0, metadata !18, metadata !DIExpression(DW_OP_LLVM_entry_value, 1, DW_OP_plus_uconst, 16, DW_OP_plus_uconst, 16, DW_OP_deref, DW_OP_deref)), !dbg !22
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%use1 = load i32, ptr null, align 4, !dbg !27
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%use2 = sext i32 %use1 to i64
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%use3 = getelementptr i8, ptr null, i64 %use2
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store ptr %use3, ptr %0, align 8
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ret void
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}
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!llvm.module.flags = !{!0}
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!llvm.dbg.cu = !{!1}
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!0 = !{i32 2, !"Debug Info Version", i32 3}
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!1 = distinct !DICompileUnit(language: DW_LANG_Swift, file: !2, producer: "blah", isOptimized: true, flags: "blah", runtimeVersion: 5, emissionKind: FullDebug, globals: !3, imports: !9, sysroot: "blah", sdk: "blah")
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!2 = !DIFile(filename: "blah", directory: "blah")
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!3 = !{!4, !10}
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!4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
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!5 = distinct !DIGlobalVariable(name: "blah", linkageName: "blah", scope: !6, file: !2, line: 49, type: !7, isLocal: true, isDefinition: true)
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!6 = !DIModule(scope: null, name: "blah", includePath: "blah")
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!7 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !8)
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!8 = !DICompositeType(tag: DW_TAG_structure_type, name: "blah", scope: !6, file: !2, size: 64, elements: !9, runtimeLang: DW_LANG_Swift, identifier: "blah")
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!9 = !{}
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!10 = !DIGlobalVariableExpression(var: !11, expr: !DIExpression())
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!11 = distinct !DIGlobalVariable(name: "blah", linkageName: "blah", scope: !6, file: !2, line: 44, type: !12, isLocal: false, isDefinition: true)
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!12 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !13)
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!13 = !DICompositeType(tag: DW_TAG_structure_type, name: "blah", scope: !14, file: !2, size: 64, elements: !9, runtimeLang: DW_LANG_Swift, identifier: "blah")
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!14 = !DIModule(scope: null, name: "blah", configMacros: "blah", includePath: "blah")
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!15 = distinct !DISubprogram(name: "blah", linkageName: "blah", scope: !16, file: !2, line: 115, type: !17, scopeLine: 117, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !1, retainedNodes: !9, thrownTypes: !9)
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!16 = !DICompositeType(tag: DW_TAG_structure_type, name: "blah", scope: !6, file: !2, elements: !9, runtimeLang: DW_LANG_Swift, identifier: "blah")
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!17 = !DISubroutineType(types: !9)
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!18 = !DILocalVariable(name: "test-var", arg: 1, scope: !19, file: !2, line: 95, type: !21, flags: DIFlagArtificial)
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!19 = distinct !DISubprogram(name: "blah", linkageName: "blah", scope: !16, file: !2, line: 95, type: !20, scopeLine: 95, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !1, retainedNodes: !9)
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!20 = distinct !DISubroutineType(types: !9)
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!21 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !16)
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!22 = !DILocation(line: 95, column: 9, scope: !19, inlinedAt: !23)
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!23 = distinct !DILocation(line: 0, scope: !24, inlinedAt: !25)
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!24 = distinct !DISubprogram(name: "blah", linkageName: "blah", scope: !16, file: !2, type: !20, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !1)
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!25 = distinct !DILocation(line: 121, column: 36, scope: !26)
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!26 = distinct !DILexicalBlock(scope: !15, file: !2, line: 116, column: 7)
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!27 = !DILocation(line: 0, scope: !28, inlinedAt: !23)
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!28 = !DILexicalBlockFile(scope: !19, file: !2, discriminator: 0)
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...
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---
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name: blah
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alignment: 16
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tracksRegLiveness: true
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debugInstrRef: true
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tracksDebugUserValues: true
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registers: []
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liveins:
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- { reg: '$r14', virtual-reg: '' }
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frameInfo:
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maxAlignment: 1
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body: |
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bb.0 (%ir-block.1):
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liveins: $r14
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DBG_PHI $r14, 1
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DBG_INSTR_REF !18, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_entry_value, 1, DW_OP_plus_uconst, 16, DW_OP_plus_uconst, 16, DW_OP_deref, DW_OP_deref), dbg-instr-ref(1, 0), debug-location !22
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DBG_VALUE_LIST !18, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_entry_value, 1, DW_OP_plus_uconst, 16, DW_OP_plus_uconst, 16, DW_OP_deref, DW_OP_deref), $r14, debug-location !DILocation(line: 0, scope: !19, inlinedAt: !23)
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renamable $rax = MOVSX64rm32 $noreg, 1, $noreg, 0, $noreg, debug-location !27 :: (load (s32) from `ptr null`)
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MOV64mr killed renamable $r14, 1, $noreg, 0, $noreg, killed renamable $rax :: (store (s64) into %ir.0)
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RETI64 8
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...
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