--- /dev/null
+; RUN: opt -S -licm < %s | FileCheck %s
+
+; LICM is trying to merge the two `store` in block %14 and %17, but given their
+; locations disagree, it sets a line zero location instead instead of picking a
+; random one (the DILocation picked the nearest enclosing scope of the two stores).
+
+; Original C testcase.
+; volatile int a;
+; extern int g;
+; int g;
+; void f1() {
+; while (a) {
+; g = 0;
+; if (a)
+; g = 0;
+; }
+; }
+
+; CHECK: %.lcssa = phi i32
+; CHECK-NEXT: store i32 %.lcssa, i32* getelementptr inbounds ([2 x i32], [2 x i32]* @g_390, i64 0, i64 1), align 4, !dbg [[storeLocation:![0-9]+]]
+; CHECK: [[storeLocation]] = !DILocation(line: 0
+
+target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.15.0"
+
+@b = global i32 0, align 4, !dbg !0
+@c = global i32 0, align 4, !dbg !10
+@g_390 = local_unnamed_addr global [2 x i32] zeroinitializer, align 4, !dbg !12
+@a = local_unnamed_addr global i32 0, align 4, !dbg !6
+
+define i32 @main() local_unnamed_addr !dbg !22 {
+ %1 = load volatile i32, i32* @b, align 4, !dbg !37, !tbaa !40
+ %2 = icmp sgt i32 %1, -9, !dbg !44
+ br i1 %2, label %3, label %5, !dbg !45
+
+3: ; preds = %0
+ br label %9, !dbg !45
+
+4: ; preds = %9
+ br label %5, !dbg !45
+
+5: ; preds = %4, %0
+ %6 = load volatile i32, i32* @c, align 4, !dbg !46, !tbaa !40
+ %7 = icmp slt i32 %6, 6, !dbg !47
+ br i1 %7, label %8, label %24, !dbg !48
+
+8: ; preds = %5
+ br label %14, !dbg !48
+
+9: ; preds = %3, %9
+ %10 = load volatile i32, i32* @b, align 4, !dbg !49, !tbaa !40
+ %11 = add nsw i32 %10, -1, !dbg !49
+ store volatile i32 %11, i32* @b, align 4, !dbg !49, !tbaa !40
+ %12 = load volatile i32, i32* @b, align 4, !dbg !37, !tbaa !40
+ %13 = icmp sgt i32 %12, -9, !dbg !44
+ br i1 %13, label %9, label %4, !dbg !45, !llvm.loop !50
+
+14: ; preds = %8, %18
+ store i32 0, i32* getelementptr inbounds ([2 x i32], [2 x i32]* @g_390, i64 0, i64 1), align 4, !dbg !53, !tbaa !40
+ %15 = load volatile i32, i32* @b, align 4, !dbg !54, !tbaa !40
+ %16 = icmp eq i32 %15, 0, !dbg !54
+ br i1 %16, label %17, label %18, !dbg !55
+
+17: ; preds = %14
+ store i32 0, i32* getelementptr inbounds ([2 x i32], [2 x i32]* @g_390, i64 0, i64 1), align 4, !dbg !56, !tbaa !40
+ br label %18
+
+18: ; preds = %14, %17
+ %19 = load volatile i32, i32* @c, align 4, !dbg !57, !tbaa !40
+ %20 = add nsw i32 %19, 1, !dbg !57
+ store volatile i32 %20, i32* @c, align 4, !dbg !57, !tbaa !40
+ %21 = load volatile i32, i32* @c, align 4, !dbg !46, !tbaa !40
+ %22 = icmp slt i32 %21, 6, !dbg !47
+ br i1 %22, label %14, label %23, !dbg !48, !llvm.loop !58
+
+23: ; preds = %18
+ br label %24, !dbg !48
+
+24: ; preds = %23, %5
+ ret i32 0, !dbg !60
+}
+
+!llvm.dbg.cu = !{!2}
+!llvm.module.flags = !{!17, !18, !19, !20}
+!llvm.ident = !{!21}
+
+!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
+!1 = distinct !DIGlobalVariable(name: "b", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
+!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 11.0.0 (https://github.com/llvm/llvm-project d3588d0814c4cbc7fca677b4d9634f6e1428a331)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None, sysroot: "/")
+!3 = !DIFile(filename: "a.c", directory: "/Users/davide/work/build/bin")
+!4 = !{}
+!5 = !{!6, !0, !10, !12}
+!6 = !DIGlobalVariableExpression(var: !7, expr: !DIExpression())
+!7 = distinct !DIGlobalVariable(name: "a", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
+!8 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !9)
+!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!10 = !DIGlobalVariableExpression(var: !11, expr: !DIExpression())
+!11 = distinct !DIGlobalVariable(name: "c", scope: !2, file: !3, line: 1, type: !8, isLocal: false, isDefinition: true)
+!12 = !DIGlobalVariableExpression(var: !13, expr: !DIExpression())
+!13 = distinct !DIGlobalVariable(name: "g_390", scope: !2, file: !3, line: 2, type: !14, isLocal: false, isDefinition: true)
+!14 = !DICompositeType(tag: DW_TAG_array_type, baseType: !9, size: 64, elements: !15)
+!15 = !{!16}
+!16 = !DISubrange(count: 2)
+!17 = !{i32 7, !"Dwarf Version", i32 4}
+!18 = !{i32 2, !"Debug Info Version", i32 3}
+!19 = !{i32 1, !"wchar_size", i32 4}
+!20 = !{i32 7, !"PIC Level", i32 2}
+!21 = !{!"clang version 11.0.0 (https://github.com/llvm/llvm-project d3588d0814c4cbc7fca677b4d9634f6e1428a331)"}
+!22 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 3, type: !23, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !25)
+!23 = !DISubroutineType(types: !24)
+!24 = !{!9}
+!25 = !{!26}
+!26 = !DILocalVariable(name: "l_1546", scope: !27, file: !3, line: 11, type: !32)
+!27 = distinct !DILexicalBlock(scope: !28, file: !3, line: 10, column: 10)
+!28 = distinct !DILexicalBlock(scope: !29, file: !3, line: 8, column: 9)
+!29 = distinct !DILexicalBlock(scope: !30, file: !3, line: 6, column: 23)
+!30 = distinct !DILexicalBlock(scope: !31, file: !3, line: 6, column: 3)
+!31 = distinct !DILexicalBlock(scope: !22, file: !3, line: 6, column: 3)
+!32 = !DICompositeType(tag: DW_TAG_array_type, baseType: !33, size: 288, elements: !34)
+!33 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
+!34 = !{!35, !36, !35}
+!35 = !DISubrange(count: 3)
+!36 = !DISubrange(count: 4)
+!37 = !DILocation(line: 4, column: 10, scope: !38)
+!38 = distinct !DILexicalBlock(scope: !39, file: !3, line: 4, column: 3)
+!39 = distinct !DILexicalBlock(scope: !22, file: !3, line: 4, column: 3)
+!40 = !{!41, !41, i64 0}
+!41 = !{!"int", !42, i64 0}
+!42 = !{!"omnipotent char", !43, i64 0}
+!43 = !{!"Simple C/C++ TBAA"}
+!44 = !DILocation(line: 4, column: 12, scope: !38)
+!45 = !DILocation(line: 4, column: 3, scope: !39)
+!46 = !DILocation(line: 6, column: 10, scope: !30)
+!47 = !DILocation(line: 6, column: 12, scope: !30)
+!48 = !DILocation(line: 6, column: 3, scope: !31)
+!49 = !DILocation(line: 4, column: 19, scope: !38)
+!50 = distinct !{!50, !45, !51, !52}
+!51 = !DILocation(line: 5, column: 5, scope: !39)
+!52 = !{!"llvm.loop.unroll.disable"}
+!53 = !DILocation(line: 7, column: 14, scope: !29)
+!54 = !DILocation(line: 8, column: 9, scope: !28)
+!55 = !DILocation(line: 8, column: 9, scope: !29)
+!56 = !DILocation(line: 12, column: 16, scope: !27)
+!57 = !DILocation(line: 6, column: 19, scope: !30)
+!58 = distinct !{!58, !48, !59, !52}
+!59 = !DILocation(line: 14, column: 3, scope: !31)
+!60 = !DILocation(line: 15, column: 1, scope: !22)