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67886a34d2
Summary: Most DIExpressions are empty or very simple. When they are complex, they tend to be unique, so checking them inline is reasonable. This also avoids the need for CodeGen passes to append to the llvm.dbg.mir named md node. See also PR22780, for making DIExpression not be an MDNode. Reviewers: aprantl, dexonsmith, dblaikie Subscribers: qcolombet, javed.absar, eraman, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D37075 llvm-svn: 311594
61 lines
3.1 KiB
LLVM
61 lines
3.1 KiB
LLVM
; RUN: opt < %s -asan -asan-module -asan-use-after-return=0 -S | FileCheck %s
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; Checks that llvm.dbg.declare instructions are updated
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; accordingly as we merge allocas.
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i32 @_Z3zzzi(i32 %p) nounwind uwtable sanitize_address !dbg !5 {
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entry:
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%p.addr = alloca i32, align 4
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%r = alloca i32, align 4
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store volatile i32 %p, i32* %p.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %p.addr, metadata !10, metadata !DIExpression()), !dbg !11
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call void @llvm.dbg.declare(metadata i32* %r, metadata !12, metadata !DIExpression()), !dbg !14
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%0 = load i32, i32* %p.addr, align 4, !dbg !14
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%add = add nsw i32 %0, 1, !dbg !14
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store volatile i32 %add, i32* %r, align 4, !dbg !14
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%1 = load i32, i32* %r, align 4, !dbg !15
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ret i32 %1, !dbg !15
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}
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; CHECK: define i32 @_Z3zzzi
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; CHECK: entry:
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; Verify that llvm.dbg.declare calls are in the entry basic block.
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; CHECK-NOT: %entry
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; CHECK: call void @llvm.dbg.declare(metadata {{.*}}, metadata ![[ARG_ID:[0-9]+]], metadata !DIExpression())
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; CHECK-NOT: %entry
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; CHECK: call void @llvm.dbg.declare(metadata {{.*}}, metadata ![[VAR_ID:[0-9]+]], metadata !DIExpression())
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declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!17}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.3 (trunk 169314)", isOptimized: true, emissionKind: FullDebug, file: !16, enums: !1, retainedTypes: !1, globals: !1)
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!1 = !{}
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!5 = distinct !DISubprogram(name: "zzz", linkageName: "_Z3zzzi", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 1, file: !16, scope: !6, type: !7, variables: !1)
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!6 = !DIFile(filename: "a.cc", directory: "/usr/local/google/llvm_cmake_clang/tmp/debuginfo")
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!7 = !DISubroutineType(types: !8)
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!8 = !{!9, !9}
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!9 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!10 = !DILocalVariable(name: "p", line: 1, arg: 1, scope: !5, file: !6, type: !9)
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!11 = !DILocation(line: 1, scope: !5)
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!12 = !DILocalVariable(name: "r", line: 2, scope: !13, file: !6, type: !9)
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; Verify that debug descriptors for argument and local variable will be replaced
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; with descriptors that end with OpDeref (encoded as 2).
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; CHECK: ![[ARG_ID]] = !DILocalVariable(name: "p", arg: 1,{{.*}} line: 1
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; CHECK: ![[VAR_ID]] = !DILocalVariable(name: "r",{{.*}} line: 2
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; Verify that there are no more variable descriptors.
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; CHECK-NOT: !DILocalVariable(tag: DW_TAG_arg_variable
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; CHECK-NOT: !DILocalVariable(tag: DW_TAG_auto_variable
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!13 = distinct !DILexicalBlock(line: 1, column: 0, file: !16, scope: !5)
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!14 = !DILocation(line: 2, scope: !13)
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!15 = !DILocation(line: 3, scope: !13)
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!16 = !DIFile(filename: "a.cc", directory: "/usr/local/google/llvm_cmake_clang/tmp/debuginfo")
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!17 = !{i32 1, !"Debug Info Version", i32 3}
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