1; RUN: opt -passes=mem2reg -S %s -o - \ 2; RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg" 3; RUN: opt --try-experimental-debuginfo-iterators -passes=mem2reg -S %s -o - \ 4; RUN: | FileCheck %s --implicit-check-not="call void @llvm.dbg" 5 6;; Test assignment tracking debug info when mem2reg promotes a single-store 7;; alloca. Additionally, check that all the dbg.assigns linked to the alloca 8;; are cleaned up, including duplciates. 9 10; CHECK: entry: 11; CHECK-NEXT: #dbg_value(i32 %a, ![[B:[0-9]+]] 12; CHECK-NEXT: #dbg_value(i32 %a, ![[A:[0-9]+]] 13; CHECK-NEXT: ret 14 15; CHECK-DAG: ![[A]] = !DILocalVariable(name: "a", 16; CHECK-DAG: ![[B]] = !DILocalVariable(name: "b", 17 18;; 1. using source: 19;; $ cat test.cpp 20;; int f(int a) { return a; } 21;; 2. manually duplicating the dbg.assign lnked to a's alloca to ensure 22;; duplicates are still cleaned up, 23;; 3. and with a dbg.assign for another variable ("b") attached to a's alloca 24;; to check that a dbg.value is generated for the variable to represent the 25;; store despite the store not having a dbg.assign linked for it. 26 27; Function Attrs: mustprogress nounwind uwtable 28define dso_local noundef i32 @_Z1fi(i32 noundef %a) #0 !dbg !7 { 29entry: 30 %a.addr = alloca i32, align 4, !DIAssignID !13 31 call void @llvm.dbg.assign(metadata i1 undef, metadata !12, metadata !DIExpression(), metadata !13, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14 32 call void @llvm.dbg.assign(metadata i1 undef, metadata !12, metadata !DIExpression(), metadata !13, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14 33 call void @llvm.dbg.assign(metadata i1 undef, metadata !22, metadata !DIExpression(), metadata !13, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14 34 store i32 %a, ptr %a.addr, align 4, !DIAssignID !19 35 call void @llvm.dbg.assign(metadata i32 %a, metadata !12, metadata !DIExpression(), metadata !19, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14 36 %0 = load i32, ptr %a.addr, align 4, !dbg !20 37 ret i32 %0, !dbg !21 38} 39 40declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata) 41 42!llvm.dbg.cu = !{!0} 43!llvm.module.flags = !{!2, !3, !4, !5, !1000} 44!llvm.ident = !{!6} 45 46!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 14.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None) 47!1 = !DIFile(filename: "test.cpp", directory: "/") 48!2 = !{i32 7, !"Dwarf Version", i32 5} 49!3 = !{i32 2, !"Debug Info Version", i32 3} 50!4 = !{i32 1, !"wchar_size", i32 4} 51!5 = !{i32 7, !"uwtable", i32 1} 52!6 = !{!"clang version 14.0.0)"} 53!7 = distinct !DISubprogram(name: "f", linkageName: "_Z1fi", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !11) 54!8 = !DISubroutineType(types: !9) 55!9 = !{!10, !10} 56!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 57!11 = !{!12} 58!12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 1, type: !10) 59!13 = distinct !DIAssignID() 60!14 = !DILocation(line: 0, scope: !7) 61!19 = distinct !DIAssignID() 62!20 = !DILocation(line: 1, column: 23, scope: !7) 63!21 = !DILocation(line: 1, column: 16, scope: !7) 64!22 = !DILocalVariable(name: "b", scope: !7, file: !1, line: 1, type: !10) 65!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true} 66