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 an alloca with 7;; stores requiring insertion of a phi. Check the output when the stores are 8;; tagged and also untagged (test manually updated for the latter by linking a 9;; dbg.assgin for another variable "b" to the alloca). 10 11; CHECK: entry: 12; CHECK-NEXT: #dbg_value(i32 %a, ![[B:[0-9]+]] 13; CHECK-NEXT: #dbg_value(i32 %a, ![[A:[0-9]+]] 14; CHECK: if.then: 15; CHECK-NEXT: %add = 16; CHECK-NEXT: #dbg_value(i32 %add, ![[B]] 17; CHECK-NEXT: #dbg_value(i32 %add, ![[A]] 18; CHECK: if.else: 19; CHECK-NEXT: #dbg_value(i32 -1, ![[B]] 20; CHECK-NEXT: #dbg_value(i32 -1, ![[A]] 21; CHECK: if.end: 22; CHECK-NEXT: %a.addr.0 = phi i32 23; CHECK-NEXT: #dbg_value(i32 %a.addr.0, ![[A]] 24; CHECK-NEXT: #dbg_value(i32 %a.addr.0, ![[B]] 25 26; CHECK-DAG: ![[A]] = !DILocalVariable(name: "a", 27; CHECK-DAG: ![[B]] = !DILocalVariable(name: "b", 28 29;; $ cat test.cpp 30;; int f(int a) { 31;; if (a) 32;; a += 1; 33;; else 34;; a = -1; 35;; return a; 36;; } 37 38define dso_local noundef i32 @_Z1fi(i32 noundef %a) #0 !dbg !7 { 39entry: 40 %a.addr = alloca i32, align 4, !DIAssignID !13 41 call void @llvm.dbg.assign(metadata i1 undef, metadata !12, metadata !DIExpression(), metadata !13, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14 42 call void @llvm.dbg.assign(metadata i1 undef, metadata !30, metadata !DIExpression(), metadata !13, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14 43 store i32 %a, ptr %a.addr, align 4, !DIAssignID !19 44 call void @llvm.dbg.assign(metadata i32 %a, metadata !12, metadata !DIExpression(), metadata !19, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14 45 %0 = load i32, ptr %a.addr, align 4, !dbg !20 46 %tobool = icmp ne i32 %0, 0, !dbg !20 47 br i1 %tobool, label %if.then, label %if.else, !dbg !22 48 49if.then: ; preds = %entry 50 %1 = load i32, ptr %a.addr, align 4, !dbg !23 51 %add = add nsw i32 %1, 1, !dbg !23 52 store i32 %add, ptr %a.addr, align 4, !dbg !23, !DIAssignID !24 53 call void @llvm.dbg.assign(metadata i32 %add, metadata !12, metadata !DIExpression(), metadata !24, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14 54 br label %if.end, !dbg !25 55 56if.else: ; preds = %entry 57 store i32 -1, ptr %a.addr, align 4, !dbg !26, !DIAssignID !27 58 call void @llvm.dbg.assign(metadata i32 -1, metadata !12, metadata !DIExpression(), metadata !27, metadata ptr %a.addr, metadata !DIExpression()), !dbg !14 59 br label %if.end 60 61if.end: ; preds = %if.else, %if.then 62 %2 = load i32, ptr %a.addr, align 4, !dbg !28 63 ret i32 %2, !dbg !29 64} 65 66declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata) 67 68!llvm.dbg.cu = !{!0} 69!llvm.module.flags = !{!2, !3, !4, !5, !1000} 70!llvm.ident = !{!6} 71 72!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) 73!1 = !DIFile(filename: "test.cpp", directory: "/") 74!2 = !{i32 7, !"Dwarf Version", i32 5} 75!3 = !{i32 2, !"Debug Info Version", i32 3} 76!4 = !{i32 1, !"wchar_size", i32 4} 77!5 = !{i32 7, !"uwtable", i32 1} 78!6 = !{!"clang version 14.0.0"} 79!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) 80!8 = !DISubroutineType(types: !9) 81!9 = !{!10, !10} 82!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 83!11 = !{!12} 84!12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 1, type: !10) 85!13 = distinct !DIAssignID() 86!14 = !DILocation(line: 0, scope: !7) 87!19 = distinct !DIAssignID() 88!20 = !DILocation(line: 2, column: 7, scope: !21) 89!21 = distinct !DILexicalBlock(scope: !7, file: !1, line: 2, column: 7) 90!22 = !DILocation(line: 2, column: 7, scope: !7) 91!23 = !DILocation(line: 3, column: 7, scope: !21) 92!24 = distinct !DIAssignID() 93!25 = !DILocation(line: 3, column: 5, scope: !21) 94!26 = !DILocation(line: 5, column: 7, scope: !21) 95!27 = distinct !DIAssignID() 96!28 = !DILocation(line: 6, column: 10, scope: !7) 97!29 = !DILocation(line: 6, column: 3, scope: !7) 98!30 = !DILocalVariable(name: "b", arg: 2, scope: !7, file: !1, line: 1, type: !10) 99!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true} 100