74c3025dd5
Given the same branch condition in `a` and `c` SimplifyCFG converts:
+> b -+
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--> a --> c --> e -->
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+> d -+
into:
+--> bcd ---+
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--> a --> c --> e -->
Remap source atoms on instructions duplicated from `c` into `bcd`.
RFC:
https://discourse.llvm.org/t/rfc-improving-is-stmt-placement-for-better-interactive-debugging/82668
63 lines
2.2 KiB
LLVM
63 lines
2.2 KiB
LLVM
; RUN: opt %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S \
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; RUN: | FileCheck %s
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;; Generated using:
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;; opt -passes=debugify --debugify-atoms --debugify-level=locations \
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;; llvm/test/Transforms/SimplifyCFG/debug-info-thread-phi.ll
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;; With unused/untested metadata nodes removed.
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;; Check the duplicated store gets distinct atom info in each branch.
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; CHECK-LABEL: @bar(
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; CHECK: if.then:
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; CHECK: store i32 1{{.*}}, !dbg [[DBG1:!.*]]
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; CHECK: if.end.1.critedge:
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; CHECK: store i32 1{{.*}}, !dbg [[DBG2:!.*]]
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; CHECK: [[DBG1]] = !DILocation(line: 1{{.*}}, atomGroup: 1
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; CHECK: [[DBG2]] = !DILocation(line: 1{{.*}}, atomGroup: 2
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define void @bar(i32 %aa) !dbg !5 {
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entry:
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%aa.addr = alloca i32, align 4
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%bb = alloca i32, align 4
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store i32 %aa, ptr %aa.addr, align 4
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store i32 0, ptr %bb, align 4
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%tobool = icmp ne i32 %aa, 0
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br i1 %tobool, label %if.then, label %if.end
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if.then: ; preds = %entry
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call void @foo()
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br label %if.end
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if.end: ; preds = %if.then, %entry
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store i32 1, ptr %bb, align 4, !dbg !8
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br i1 %tobool, label %if.then.1, label %if.end.1
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if.then.1: ; preds = %if.end
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call void @foo()
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br label %if.end.1
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if.end.1: ; preds = %if.then.1, %if.end
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store i32 2, ptr %bb, align 4
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br label %for.end
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for.end: ; preds = %if.end.1
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ret void
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}
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declare void @foo()
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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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!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
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!1 = !DIFile(filename: "llvm/test/Transforms/SimplifyCFG/debug-info-thread-phi.ll", directory: "/")
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!2 = !{i32 15}
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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: "bar", linkageName: "bar", 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, atomGroup: 1, atomRank: 1)
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