73 lines
2.5 KiB
LLVM
73 lines
2.5 KiB
LLVM
; RUN: opt -S -passes=simplifycfg < %s | FileCheck %s
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; Check that SimplifyCFGPass's performBlockTailMerging() propagates
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; the debug location of the old block terminator to the new branch
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; instruction.
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define i32 @foo(i64 %x, i64 %y) !dbg !5 {
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; CHECK-LABEL: define i32 @foo(
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; CHECK: a:
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; CHECK: br label %[[COMMON_RET:.*]], !dbg [[DBG14:![0-9]+]]
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; CHECK: b:
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; CHECK: br label %[[COMMON_RET]], !dbg [[DBG17:![0-9]+]]
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;
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entry:
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%eq = icmp eq i64 %x, %y, !dbg !8
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br i1 %eq, label %b, label %switch, !dbg !9
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switch: ; preds = %entry
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%lt = icmp slt i64 %x, %y, !dbg !10
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%qux = select i1 %lt, i32 0, i32 2, !dbg !11
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switch i32 %qux, label %bees [
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i32 0, label %a
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i32 1, label %b
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i32 2, label %b
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], !dbg !12
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a: ; preds = %switch
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tail call void @bees.a(), !dbg !13
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ret i32 1, !dbg !14
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b: ; preds = %switch, %switch, %entry
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%retval = phi i32 [ 0, %switch ], [ 0, %switch ], [ 2, %entry ], !dbg !15
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tail call void @bees.b(), !dbg !16
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ret i32 %retval, !dbg !17
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bees: ; preds = %switch
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tail call void @llvm.trap(), !dbg !18
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unreachable, !dbg !19
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}
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declare void @llvm.trap()
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declare void @bees.a()
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declare void @bees.b()
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!llvm.dbg.cu = !{!0}
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!llvm.debugify = !{!2, !3}
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!llvm.module.flags = !{!4}
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; CHECK: [[DBG14]] = !DILocation(line: 7,
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; CHECK: [[DBG17]] = !DILocation(line: 10,
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!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
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!1 = !DIFile(filename: "main.ll", directory: "/")
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!2 = !{i32 12}
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!3 = !{i32 0}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = distinct !DISubprogram(name: "foo", linkageName: "foo", scope: null, file: !1, line: 1, type: !6, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0)
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!6 = !DISubroutineType(types: !7)
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!7 = !{}
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!8 = !DILocation(line: 1, column: 1, scope: !5)
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!9 = !DILocation(line: 2, column: 1, scope: !5)
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!10 = !DILocation(line: 3, column: 1, scope: !5)
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!11 = !DILocation(line: 4, column: 1, scope: !5)
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!12 = !DILocation(line: 5, column: 1, scope: !5)
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!13 = !DILocation(line: 6, column: 1, scope: !5)
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!14 = !DILocation(line: 7, column: 1, scope: !5)
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!15 = !DILocation(line: 8, column: 1, scope: !5)
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!16 = !DILocation(line: 9, column: 1, scope: !5)
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!17 = !DILocation(line: 10, column: 1, scope: !5)
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!18 = !DILocation(line: 11, column: 1, scope: !5)
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!19 = !DILocation(line: 12, column: 1, scope: !5)
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