1; RUN: opt -passes=mldst-motion -S %s -o - | FileCheck %s 2 3;; $ cat test.cpp -n 4;; 1 void fun(int *a, int cond) { 5;; 2 if (cond) 6;; 3 a[1] = 1; 7;; 4 else 8;; 5 a[1] = 2; 9;; 6 } 10;; 11;; mldst-motion will merge and sink the stores in if.then and if.else into 12;; if.end. The resultant PHI, gep and store should be attributed line zero 13;; with the innermost common scope rather than picking a debug location from 14;; 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 !15 28 call void @llvm.dbg.value(metadata i32 %cond, metadata !14, metadata !DIExpression()), !dbg !15 29 %tobool.not = icmp eq i32 %cond, 0, !dbg !16 30 br i1 %tobool.not, label %if.else, label %if.then, !dbg !18 31 32if.then: ; preds = %entry 33 %arrayidx = getelementptr inbounds i32, ptr %a, i64 1, !dbg !19 34 store i32 1, ptr %arrayidx, align 4, !dbg !20 35 br label %if.end, !dbg !19 36 37if.else: ; preds = %entry 38 %arrayidx1 = getelementptr inbounds i32, ptr %a, i64 1, !dbg !25 39 store i32 2, ptr %arrayidx1, align 4, !dbg !26 40 br label %if.end 41 42if.end: ; preds = %if.else, %if.then 43 ret void, !dbg !27 44} 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