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[Debuginfo][DW_OP_implicit_pointer] (1/7) Support for DW_OP_LLVM_impl…
…icit_pointer New dwarf operator DW_OP_LLVM_implicit_pointer is introduced (present only in LLVM IR) This operator is required as it is different than DWARF operator DW_OP_implicit_pointer in representation and specification (number and types of operands) and later can not be used as multiple level. Reviewed By: aprantl Differential Revision: https://reviews.llvm.org/D84113
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; Round trip test for DW_OP_LLVM_implicit_pointer metadata | ||
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; RUN: llvm-as < %s | llvm-dis | FileCheck %s | ||
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;--------------------------- | ||
;static const char *b = "opq"; | ||
;volatile int v; | ||
;int main() { | ||
; int var = 4; | ||
; int *ptr1; | ||
; int **ptr2; | ||
; | ||
; v++; | ||
; ptr1 = &var; | ||
; ptr2 = &ptr1; | ||
; v++; | ||
; | ||
; return *ptr1 - 5 + **ptr2; | ||
;} | ||
;--------------------------- | ||
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; ModuleID = 'LLVM_implicit_pointer.c' | ||
source_filename = "LLVM_implicit_pointer.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" | ||
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@v = dso_local global i32 0, align 4, !dbg !0 | ||
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; Function Attrs: nofree norecurse nounwind uwtable | ||
define dso_local i32 @main() local_unnamed_addr !dbg !12 { | ||
entry: | ||
; CHECK: call void @llvm.dbg.value(metadata i32 4, metadata [[VAR:![0-9]+]], metadata !DIExpression()) | ||
call void @llvm.dbg.value(metadata i32 4, metadata !16, metadata !DIExpression()), !dbg !21 | ||
%0 = load volatile i32, i32* @v, align 4, !dbg !22, !tbaa !23 | ||
%inc = add nsw i32 %0, 1, !dbg !22 | ||
store volatile i32 %inc, i32* @v, align 4, !dbg !22, !tbaa !23 | ||
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; CHECK: call void @llvm.dbg.value(metadata i32 4, metadata [[PTR1:![0-9]+]], metadata !DIExpression(DW_OP_LLVM_implicit_pointer)) | ||
call void @llvm.dbg.value(metadata i32 4, metadata !17, metadata !DIExpression(DW_OP_LLVM_implicit_pointer)), !dbg !21 | ||
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; CHECK: call void @llvm.dbg.value(metadata i32 4, metadata [[PTR2:![0-9]+]], metadata !DIExpression(DW_OP_LLVM_implicit_pointer, DW_OP_LLVM_implicit_pointer)) | ||
call void @llvm.dbg.value(metadata i32 4, metadata !19, metadata !DIExpression(DW_OP_LLVM_implicit_pointer, DW_OP_LLVM_implicit_pointer)), !dbg !21 | ||
%1 = load volatile i32, i32* @v, align 4, !dbg !27, !tbaa !23 | ||
%inc1 = add nsw i32 %1, 1, !dbg !27 | ||
store volatile i32 %inc1, i32* @v, align 4, !dbg !27, !tbaa !23 | ||
ret i32 3, !dbg !28 | ||
} | ||
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; Function Attrs: nofree nosync nounwind readnone speculatable willreturn | ||
declare void @llvm.dbg.value(metadata, metadata, metadata) #1 | ||
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!llvm.dbg.cu = !{!2} | ||
!llvm.module.flags = !{!8, !9, !10} | ||
!llvm.ident = !{!11} | ||
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) | ||
!1 = distinct !DIGlobalVariable(name: "v", scope: !2, file: !3, line: 2, type: !6, isLocal: false, isDefinition: true) | ||
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 12.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, splitDebugInlining: false, nameTableKind: None) | ||
!3 = !DIFile(filename: "LLVM_implicit_pointer.c", directory: "/dir", checksumkind: CSK_MD5, checksum: "218aaa8dc9f04b056b56d944d06383dd") | ||
!4 = !{} | ||
!5 = !{!0} | ||
!6 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !7) | ||
!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) | ||
!8 = !{i32 7, !"Dwarf Version", i32 5} | ||
!9 = !{i32 2, !"Debug Info Version", i32 3} | ||
!10 = !{i32 1, !"wchar_size", i32 4} | ||
!11 = !{!"clang version 12.0.0"} | ||
!12 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 3, type: !13, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !15) | ||
!13 = !DISubroutineType(types: !14) | ||
!14 = !{!7} | ||
!15 = !{!16, !17, !19} | ||
; CHECK: [[VAR]] = !DILocalVariable(name: "var" | ||
!16 = !DILocalVariable(name: "var", scope: !12, file: !3, line: 4, type: !7) | ||
; CHECK: [[PTR1]] = !DILocalVariable(name: "ptr1" | ||
!17 = !DILocalVariable(name: "ptr1", scope: !12, file: !3, line: 5, type: !18) | ||
!18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64) | ||
; CHECK: [[PTR2]] = !DILocalVariable(name: "ptr2" | ||
!19 = !DILocalVariable(name: "ptr2", scope: !12, file: !3, line: 6, type: !20) | ||
!20 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64) | ||
!21 = !DILocation(line: 0, scope: !12) | ||
!22 = !DILocation(line: 8, column: 4, scope: !12) | ||
!23 = !{!24, !24, i64 0} | ||
!24 = !{!"int", !25, i64 0} | ||
!25 = !{!"omnipotent char", !26, i64 0} | ||
!26 = !{!"Simple C/C++ TBAA"} | ||
!27 = !DILocation(line: 11, column: 4, scope: !12) | ||
!28 = !DILocation(line: 13, column: 3, scope: !12) |