1; RUN: opt < %s -asan -asan-module -asan-use-after-return=0 -S | FileCheck %s 2 3; Checks that llvm.dbg.declare instructions are updated 4; accordingly as we merge allocas. 5 6target 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" 7target triple = "x86_64-unknown-linux-gnu" 8 9define i32 @_Z3zzzi(i32 %p) nounwind uwtable sanitize_address !dbg !5 { 10entry: 11 %p.addr = alloca i32, align 4 12 %r = alloca i32, align 4 13 store volatile i32 %p, i32* %p.addr, align 4 14 call void @llvm.dbg.declare(metadata i32* %p.addr, metadata !10, metadata !DIExpression()), !dbg !11 15 call void @llvm.dbg.declare(metadata i32* %r, metadata !12, metadata !DIExpression()), !dbg !14 16 %0 = load i32, i32* %p.addr, align 4, !dbg !14 17 %add = add nsw i32 %0, 1, !dbg !14 18 store volatile i32 %add, i32* %r, align 4, !dbg !14 19 %1 = load i32, i32* %r, align 4, !dbg !15 20 ret i32 %1, !dbg !15 21} 22 23; CHECK: define i32 @_Z3zzzi 24; CHECK: entry: 25; Verify that llvm.dbg.declare calls are in the entry basic block. 26; CHECK-NOT: %entry 27; CHECK: call void @llvm.dbg.declare(metadata {{.*}}, metadata ![[ARG_ID:[0-9]+]], metadata !DIExpression(DW_OP_plus_uconst, 32)) 28; CHECK-NOT: %entry 29; CHECK: call void @llvm.dbg.declare(metadata {{.*}}, metadata ![[VAR_ID:[0-9]+]], metadata !DIExpression(DW_OP_plus_uconst, 48)) 30 31declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone 32 33!llvm.dbg.cu = !{!0} 34!llvm.module.flags = !{!17} 35 36!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) 37!1 = !{} 38!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, retainedNodes: !1) 39!6 = !DIFile(filename: "a.cc", directory: "/usr/local/google/llvm_cmake_clang/tmp/debuginfo") 40!7 = !DISubroutineType(types: !8) 41!8 = !{!9, !9} 42!9 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 43!10 = !DILocalVariable(name: "p", line: 1, arg: 1, scope: !5, file: !6, type: !9) 44!11 = !DILocation(line: 1, scope: !5) 45!12 = !DILocalVariable(name: "r", line: 2, scope: !13, file: !6, type: !9) 46 47; Verify that debug descriptors for argument and local variable will be replaced 48; with descriptors that end with OpDeref (encoded as 2). 49; CHECK: ![[ARG_ID]] = !DILocalVariable(name: "p", arg: 1,{{.*}} line: 1 50; CHECK: ![[VAR_ID]] = !DILocalVariable(name: "r",{{.*}} line: 2 51; Verify that there are no more variable descriptors. 52; CHECK-NOT: !DILocalVariable(tag: DW_TAG_arg_variable 53; CHECK-NOT: !DILocalVariable(tag: DW_TAG_auto_variable 54 55 56!13 = distinct !DILexicalBlock(line: 1, column: 0, file: !16, scope: !5) 57!14 = !DILocation(line: 2, scope: !13) 58!15 = !DILocation(line: 3, scope: !13) 59!16 = !DIFile(filename: "a.cc", directory: "/usr/local/google/llvm_cmake_clang/tmp/debuginfo") 60!17 = !{i32 1, !"Debug Info Version", i32 3} 61