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1; RUN: opt -passes=mem2reg -S %s -o - \2; RUN: | FileCheck %s --implicit-check-not="#dbg_"3 4;; Test assignment tracking debug info when mem2reg promotes an alloca with5;; stores requiring insertion of a phi. Check the output when the stores are6;; tagged and also untagged (test manually updated for the latter by linking a7;; dbg.assgin for another variable "b" to the alloca).8 9; CHECK: entry:10; CHECK-NEXT: #dbg_value(i32 %a, ![[B:[0-9]+]]11; CHECK-NEXT: #dbg_value(i32 %a, ![[A:[0-9]+]]12; CHECK: if.then:13; CHECK-NEXT: %add =14; CHECK-NEXT: #dbg_value(i32 %add, ![[B]]15; CHECK-NEXT: #dbg_value(i32 %add, ![[A]]16; CHECK: if.else:17; CHECK-NEXT: #dbg_value(i32 -1, ![[B]]18; CHECK-NEXT: #dbg_value(i32 -1, ![[A]]19; CHECK: if.end:20; CHECK-NEXT: %a.addr.0 = phi i3221; CHECK-NEXT: #dbg_value(i32 %a.addr.0, ![[A]]22; CHECK-NEXT: #dbg_value(i32 %a.addr.0, ![[B]]23 24; CHECK-DAG: ![[A]] = !DILocalVariable(name: "a",25; CHECK-DAG: ![[B]] = !DILocalVariable(name: "b",26 27;; $ cat test.cpp28;; int f(int a) {29;; if (a)30;; a += 1;31;; else32;; a = -1;33;; return a;34;; }35 36define dso_local noundef i32 @_Z1fi(i32 noundef %a) #0 !dbg !7 {37entry:38 %a.addr = alloca i32, align 4, !DIAssignID !1339 call void @llvm.dbg.assign(metadata i1 undef, metadata !12, metadata !DIExpression(), metadata !13, metadata ptr %a.addr, metadata !DIExpression()), !dbg !1440 call void @llvm.dbg.assign(metadata i1 undef, metadata !30, metadata !DIExpression(), metadata !13, metadata ptr %a.addr, metadata !DIExpression()), !dbg !1441 store i32 %a, ptr %a.addr, align 4, !DIAssignID !1942 call void @llvm.dbg.assign(metadata i32 %a, metadata !12, metadata !DIExpression(), metadata !19, metadata ptr %a.addr, metadata !DIExpression()), !dbg !1443 %0 = load i32, ptr %a.addr, align 4, !dbg !2044 %tobool = icmp ne i32 %0, 0, !dbg !2045 br i1 %tobool, label %if.then, label %if.else, !dbg !2246 47if.then: ; preds = %entry48 %1 = load i32, ptr %a.addr, align 4, !dbg !2349 %add = add nsw i32 %1, 1, !dbg !2350 store i32 %add, ptr %a.addr, align 4, !dbg !23, !DIAssignID !2451 call void @llvm.dbg.assign(metadata i32 %add, metadata !12, metadata !DIExpression(), metadata !24, metadata ptr %a.addr, metadata !DIExpression()), !dbg !1452 br label %if.end, !dbg !2553 54if.else: ; preds = %entry55 store i32 -1, ptr %a.addr, align 4, !dbg !26, !DIAssignID !2756 call void @llvm.dbg.assign(metadata i32 -1, metadata !12, metadata !DIExpression(), metadata !27, metadata ptr %a.addr, metadata !DIExpression()), !dbg !1457 br label %if.end58 59if.end: ; preds = %if.else, %if.then60 %2 = load i32, ptr %a.addr, align 4, !dbg !2861 ret i32 %2, !dbg !2962}63 64declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata)65 66!llvm.dbg.cu = !{!0}67!llvm.module.flags = !{!2, !3, !4, !5, !1000}68!llvm.ident = !{!6}69 70!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)71!1 = !DIFile(filename: "test.cpp", directory: "/")72!2 = !{i32 7, !"Dwarf Version", i32 5}73!3 = !{i32 2, !"Debug Info Version", i32 3}74!4 = !{i32 1, !"wchar_size", i32 4}75!5 = !{i32 7, !"uwtable", i32 1}76!6 = !{!"clang version 14.0.0"}77!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)78!8 = !DISubroutineType(types: !9)79!9 = !{!10, !10}80!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)81!11 = !{!12}82!12 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 1, type: !10)83!13 = distinct !DIAssignID()84!14 = !DILocation(line: 0, scope: !7)85!19 = distinct !DIAssignID()86!20 = !DILocation(line: 2, column: 7, scope: !21)87!21 = distinct !DILexicalBlock(scope: !7, file: !1, line: 2, column: 7)88!22 = !DILocation(line: 2, column: 7, scope: !7)89!23 = !DILocation(line: 3, column: 7, scope: !21)90!24 = distinct !DIAssignID()91!25 = !DILocation(line: 3, column: 5, scope: !21)92!26 = !DILocation(line: 5, column: 7, scope: !21)93!27 = distinct !DIAssignID()94!28 = !DILocation(line: 6, column: 10, scope: !7)95!29 = !DILocation(line: 6, column: 3, scope: !7)96!30 = !DILocalVariable(name: "b", arg: 2, scope: !7, file: !1, line: 1, type: !10)97!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}98