c672ba7dde
With intrinsics representing debug-info, we just clone all the intrinsics when inlining a function and don't think about it any further. With non-instruction debug-info however we need to be a bit more careful and manually move the debug-info from one place to another. For the most part, this means keeping a "cursor" during block cloning of where we last copied debug-info from, and performing debug-info copying whenever we successfully clone another instruction. There are several utilities in LLVM for doing this, all of which now need to manually call cloneDebugInfo. The testing story for this is not well covered as we could rely on normal instruction-cloning mechanisms to do all the hard stuff. Thus, I've added a few tests to explicitly test dbg.value behaviours, ahead of them becoming not-instructions.
62 lines
3.2 KiB
LLVM
62 lines
3.2 KiB
LLVM
; RUN: opt < %s -S -passes=inline -inline-threshold=2 | FileCheck %s
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; RUN: opt < %s -S -strip-debug -passes=inline -inline-threshold=2 | FileCheck %s
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; RUN: opt < %s -S -passes='cgscc(inline)' -inline-threshold=2 | FileCheck %s
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; RUN: opt < %s -S -strip-debug -passes='cgscc(inline)' -inline-threshold=2 | FileCheck %s
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;
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; RUN: opt < %s -S -passes=inline -inline-threshold=2 --try-experimental-debuginfo-iterators | FileCheck %s
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; RUN: opt < %s -S -passes='cgscc(inline)' -inline-threshold=2 --try-experimental-debuginfo-iterators | FileCheck %s
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;
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; The purpose of this test is to check that debug info doesn't influence
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; inlining decisions.
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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define <4 x float> @inner_vectors(<4 x float> %a, <4 x float> %b) {
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entry:
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call void @llvm.dbg.value(metadata i32 undef, metadata !DILocalVariable(scope: !6), metadata !DIExpression()), !dbg !DILocation(scope: !6)
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%mul = fmul <4 x float> %a, <float 3.000000e+00, float 3.000000e+00, float 3.000000e+00, float 3.000000e+00>
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call void @llvm.dbg.value(metadata i32 undef, metadata !DILocalVariable(scope: !6), metadata !DIExpression()), !dbg !DILocation(scope: !6)
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%mul1 = fmul <4 x float> %b, <float 5.000000e+00, float 5.000000e+00, float 5.000000e+00, float 5.000000e+00>
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call void @llvm.dbg.value(metadata i32 undef, metadata !DILocalVariable(scope: !6), metadata !DIExpression()), !dbg !DILocation(scope: !6)
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%add = fadd <4 x float> %mul, %mul1
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ret <4 x float> %add
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}
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define float @outer_vectors(<4 x float> %a, <4 x float> %b) {
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; CHECK-LABEL: @outer_vectors(
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; CHECK-NOT: call <4 x float> @inner_vectors(
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; CHECK: ret float
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entry:
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call void @llvm.dbg.value(metadata i32 undef, metadata !DILocalVariable(scope: !6), metadata !DIExpression()), !dbg !DILocation(scope: !6)
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call void @llvm.dbg.value(metadata i32 undef, metadata !DILocalVariable(scope: !6), metadata !DIExpression()), !dbg !DILocation(scope: !6)
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%call = call <4 x float> @inner_vectors(<4 x float> %a, <4 x float> %b)
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call void @llvm.dbg.value(metadata i32 undef, metadata !DILocalVariable(scope: !6), metadata !DIExpression()), !dbg !DILocation(scope: !6)
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%vecext = extractelement <4 x float> %call, i32 0
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%vecext1 = extractelement <4 x float> %call, i32 1
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%add = fadd float %vecext, %vecext1
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%vecext2 = extractelement <4 x float> %call, i32 2
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%add3 = fadd float %add, %vecext2
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%vecext4 = extractelement <4 x float> %call, i32 3
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%add5 = fadd float %add3, %vecext4
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ret float %add5
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}
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attributes #0 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!llvm.ident = !{!5}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
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!1 = !DIFile(filename: "test.c", directory: "")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 1, !"Debug Info Version", i32 3}
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!5 = !{!""}
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!6 = distinct !DISubprogram(unit: !0)
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