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1; RUN: opt -passes=mldst-motion -S %s -o - | FileCheck %s2 3;; $ cat test.cpp -n4;; 1 void fun(int *a, int cond) {5;; 2 if (cond)6;; 3 a[1] = 1;7;; 4 else8;; 5 a[1] = 2;9;; 6 }10;;11;; mldst-motion will merge and sink the stores in if.then and if.else into12;; if.end. The resultant PHI, gep and store should be attributed line zero13;; with the innermost common scope rather than picking a debug location from14;; one of the original stores.15 16; CHECK: if.end:17; CHECK-NEXT: %.sink = phi i32 [ 2, %if.else ], [ 1, %if.then ], !dbg ![[dbg:[0-9]+]]18; CHECK-NEXT: %0 = getelementptr inbounds i32, ptr %a, i64 1, !dbg ![[dbg:[0-9]+]]19; CHECK-NEXT: store i32 %.sink, ptr %0, align 4, !dbg ![[dbg:[0-9]+]]20 21; CHECK-DAG: ![[dbg]] = !DILocation(line: 0, scope: ![[scp:[0-9]+]]22; CHECK-DAG: ![[scp]] = distinct !DILexicalBlock(scope: ![[fun:[0-9]+]]23; CHECK-DAG: ![[fun]] = distinct !DISubprogram(name: "fun",24 25define void @_Z3funPii(ptr nocapture noundef writeonly %a, i32 noundef %cond) !dbg !7 {26entry:27 call void @llvm.dbg.value(metadata ptr %a, metadata !13, metadata !DIExpression()), !dbg !1528 call void @llvm.dbg.value(metadata i32 %cond, metadata !14, metadata !DIExpression()), !dbg !1529 %tobool.not = icmp eq i32 %cond, 0, !dbg !1630 br i1 %tobool.not, label %if.else, label %if.then, !dbg !1831 32if.then: ; preds = %entry33 %arrayidx = getelementptr inbounds i32, ptr %a, i64 1, !dbg !1934 store i32 1, ptr %arrayidx, align 4, !dbg !2035 br label %if.end, !dbg !1936 37if.else: ; preds = %entry38 %arrayidx1 = getelementptr inbounds i32, ptr %a, i64 1, !dbg !2539 store i32 2, ptr %arrayidx1, align 4, !dbg !2640 br label %if.end41 42if.end: ; preds = %if.else, %if.then43 ret void, !dbg !2744}45 46declare void @llvm.dbg.value(metadata, metadata, metadata)47 48!llvm.dbg.cu = !{!0}49!llvm.module.flags = !{!2, !3, !4, !5}50!llvm.ident = !{!6}51 52!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)53!1 = !DIFile(filename: "test.cpp", directory: "/")54!2 = !{i32 7, !"Dwarf Version", i32 5}55!3 = !{i32 2, !"Debug Info Version", i32 3}56!4 = !{i32 1, !"wchar_size", i32 4}57!5 = !{i32 7, !"uwtable", i32 1}58!6 = !{!"clang version 14.0.0"}59!7 = distinct !DISubprogram(name: "fun", linkageName: "_Z3funPii", scope: !1, file: !1, line: 1, type: !8, scopeLine: 1, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !12)60!8 = !DISubroutineType(types: !9)61!9 = !{null, !10, !11}62!10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !11, size: 64)63!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)64!12 = !{!13, !14}65!13 = !DILocalVariable(name: "a", arg: 1, scope: !7, file: !1, line: 1, type: !10)66!14 = !DILocalVariable(name: "cond", arg: 2, scope: !7, file: !1, line: 1, type: !11)67!15 = !DILocation(line: 0, scope: !7)68!16 = !DILocation(line: 2, column: 7, scope: !17)69!17 = distinct !DILexicalBlock(scope: !7, file: !1, line: 2, column: 7)70!18 = !DILocation(line: 2, column: 7, scope: !7)71!19 = !DILocation(line: 3, column: 5, scope: !17)72!20 = !DILocation(line: 3, column: 10, scope: !17)73!25 = !DILocation(line: 5, column: 5, scope: !17)74!26 = !DILocation(line: 5, column: 10, scope: !17)75!27 = !DILocation(line: 6, column: 1, scope: !7)76