40bdfd39e3
LLVM will shortly be able to represent variable locations without encoding information into intrinsics -- they'll be stored as DPValue objects instead. We'll still need to be able to llvm-reduce these variable location assignments just like we can with intrinsics today, thus, here's an llvm-reduce pass that enumerates and reduces the DPValue objects. The test for this is paradoxically written with dbg.value intrinsics: this is because we're changing all the core parts of LLVM to support this first, with the textual IR format coming last. Until that arrives, testing the llvm-reduce'ing of DPValues needs the added test using intrinsics. We should be able to drop the variable assignment using %alsoloaded using this method. As with the other llvm-reduce tests, I've got one set of check lines for making the reduction happen as desired, and the other set to check the final output.
52 lines
2.3 KiB
LLVM
52 lines
2.3 KiB
LLVM
; RUN: llvm-reduce --test FileCheck --test-arg --check-prefixes=CHECK-INTERESTINGNESS --test-arg %s --test-arg --input-file %s -o %t --try-experimental-debuginfo-iterators
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; RUN: FileCheck --check-prefixes=CHECK-FINAL --input-file=%t %s --implicit-check-not=dbg.value
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; Test that we can, in RemoveDIs mode / DPValues mode (where variable location
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; information isn't an instruction), remove one variable location assignment
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; but not another.
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; CHECK-INTERESTINGNESS: call void @llvm.dbg.value(metadata i32 %added,
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; CHECK-FINAL: declare void @llvm.dbg.value(metadata,
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; CHECK-FINAL: %added = add
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; CHECK-FINAL-NEXT: call void @llvm.dbg.value(metadata i32 %added,
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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define i32 @main() !dbg !7 {
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entry:
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%uninteresting1 = alloca i32, align 4
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%interesting = alloca i32, align 4
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%uninteresting2 = alloca i32, align 4
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store i32 0, ptr %uninteresting1, align 4
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store i32 0, ptr %interesting, align 4
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%0 = load i32, ptr %interesting, align 4
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%added = add nsw i32 %0, 1
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tail call void @llvm.dbg.value(metadata i32 %added, metadata !13, metadata !DIExpression()), !dbg !14
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store i32 %added, ptr %interesting, align 4
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%alsoloaded = load i32, ptr %interesting, align 4
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tail call void @llvm.dbg.value(metadata i32 %alsoloaded, metadata !13, metadata !DIExpression()), !dbg !14
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store i32 %alsoloaded, ptr %uninteresting2, align 4
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ret i32 0
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3, !4, !5, !6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 14.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "/tmp/a.c", directory: "/")
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!2 = !{i32 7, !"Dwarf Version", i32 4}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{i32 1, !"wchar_size", i32 4}
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!5 = !{i32 7, !"uwtable", i32 1}
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!6 = !{i32 7, !"frame-pointer", i32 2}
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!7 = distinct !DISubprogram(name: "main", scope: !8, file: !8, line: 1, type: !9, scopeLine: 1, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !12)
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!8 = !DIFile(filename: "/tmp/a.c", directory: "")
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!9 = !DISubroutineType(types: !10)
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!10 = !{!11}
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!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!12 = !{}
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!13 = !DILocalVariable(name: "a", scope: !7, file: !8, line: 2, type: !11)
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!14 = !DILocation(line: 2, column: 7, scope: !7)
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