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1; RUN: opt < %s -passes=gvn-sink -S | FileCheck %s2 3; Test that GVNSink correctly performs the sink optimization in the presence of debug information4; Test that GVNSink correctly merges the debug locations of sinked instruction, eg, propagating5; the merged debug location of `%add` and `%add1` to the sinked add instruction.6 7; Function Attrs: noinline nounwind uwtable8define dso_local i32 @fun(i32 noundef %a, i32 noundef %b) #0 !dbg !10 {9; CHECK-LABEL: define dso_local i32 @fun(10; CHECK-SAME: i32 noundef [[A:%.*]], i32 noundef [[B:%.*]])11; CHECK: if.end:12; CHECK: [[B_SINK:%.*]] = phi i32 [ [[B]], %if.else ], [ [[A]], %if.then ]13; CHECK: [[ADD1:%.*]] = add nsw i32 [[B_SINK]], 1, !dbg [[DBG:![0-9]+]]14; CHECK: [[XOR2:%.*]] = xor i32 [[ADD1]], 1, !dbg [[DBG:![0-9]+]]15; CHECK: [[DBG]] = !DILocation(line: 0,16;17entry:18 tail call void @llvm.dbg.value(metadata i32 %a, metadata !15, metadata !DIExpression()), !dbg !1619 tail call void @llvm.dbg.value(metadata i32 %b, metadata !17, metadata !DIExpression()), !dbg !1620 %cmp = icmp sgt i32 %b, 10, !dbg !1821 br i1 %cmp, label %if.then, label %if.else, !dbg !2022 23if.then: ; preds = %entry24 %add = add nsw i32 %a, 1, !dbg !2125 tail call void @llvm.dbg.value(metadata i32 %add, metadata !23, metadata !DIExpression()), !dbg !2426 %xor = xor i32 %add, 1, !dbg !2527 tail call void @llvm.dbg.value(metadata i32 %xor, metadata !26, metadata !DIExpression()), !dbg !2428 tail call void @llvm.dbg.value(metadata i32 %xor, metadata !27, metadata !DIExpression()), !dbg !1629 br label %if.end, !dbg !2830 31if.else: ; preds = %entry32 %add1 = add nsw i32 %b, 1, !dbg !2933 tail call void @llvm.dbg.value(metadata i32 %add1, metadata !31, metadata !DIExpression()), !dbg !3234 %xor2 = xor i32 %add1, 1, !dbg !3335 tail call void @llvm.dbg.value(metadata i32 %xor2, metadata !34, metadata !DIExpression()), !dbg !3236 tail call void @llvm.dbg.value(metadata i32 %xor2, metadata !27, metadata !DIExpression()), !dbg !1637 br label %if.end38 39if.end: ; preds = %if.else, %if.then40 %ret.0 = phi i32 [ %xor, %if.then ], [ %xor2, %if.else ], !dbg !3541 tail call void @llvm.dbg.value(metadata i32 %ret.0, metadata !27, metadata !DIExpression()), !dbg !1642 ret i32 %ret.0, !dbg !3643}44 45; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)46declare void @llvm.dbg.declare(metadata, metadata, metadata) #147 48; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)49declare void @llvm.dbg.value(metadata, metadata, metadata) #150 51attributes #0 = { noinline nounwind uwtable "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }52attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }53 54!llvm.dbg.cu = !{!0}55!llvm.module.flags = !{!2, !3, !4, !5, !6, !7, !8}56 57!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang version 18.0.0git (https://github.com/llvm/llvm-project.git 5dfcb3e5d1d16bb4f8fce52b3c089119ed977e7f)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)58!1 = !DIFile(filename: "main.c", directory: "/")59!2 = !{i32 7, !"Dwarf Version", i32 5}60!3 = !{i32 2, !"Debug Info Version", i32 3}61!4 = !{i32 1, !"wchar_size", i32 4}62!5 = !{i32 8, !"PIC Level", i32 2}63!6 = !{i32 7, !"PIE Level", i32 2}64!7 = !{i32 7, !"uwtable", i32 2}65!8 = !{i32 7, !"frame-pointer", i32 2}66!10 = distinct !DISubprogram(name: "fun", scope: !1, file: !1, line: 1, type: !11, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !14)67!11 = !DISubroutineType(types: !12)68!12 = !{!13, !13, !13}69!13 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)70!14 = !{}71!15 = !DILocalVariable(name: "a", arg: 1, scope: !10, file: !1, line: 1, type: !13)72!16 = !DILocation(line: 0, scope: !10)73!17 = !DILocalVariable(name: "b", arg: 2, scope: !10, file: !1, line: 1, type: !13)74!18 = !DILocation(line: 3, column: 11, scope: !19)75!19 = distinct !DILexicalBlock(scope: !10, file: !1, line: 3, column: 9)76!20 = !DILocation(line: 3, column: 9, scope: !10)77!21 = !DILocation(line: 4, column: 20, scope: !22)78!22 = distinct !DILexicalBlock(scope: !19, file: !1, line: 3, column: 17)79!23 = !DILocalVariable(name: "a1", scope: !22, file: !1, line: 4, type: !13)80!24 = !DILocation(line: 0, scope: !22)81!25 = !DILocation(line: 5, column: 21, scope: !22)82!26 = !DILocalVariable(name: "a2", scope: !22, file: !1, line: 5, type: !13)83!27 = !DILocalVariable(name: "ret", scope: !10, file: !1, line: 2, type: !13)84!28 = !DILocation(line: 7, column: 5, scope: !22)85!29 = !DILocation(line: 8, column: 20, scope: !30)86!30 = distinct !DILexicalBlock(scope: !19, file: !1, line: 7, column: 12)87!31 = !DILocalVariable(name: "b1", scope: !30, file: !1, line: 8, type: !13)88!32 = !DILocation(line: 0, scope: !30)89!33 = !DILocation(line: 9, column: 21, scope: !30)90!34 = !DILocalVariable(name: "b2", scope: !30, file: !1, line: 9, type: !13)91!35 = !DILocation(line: 0, scope: !19)92!36 = !DILocation(line: 12, column: 5, scope: !10)93