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a2029fa58e
In order to set breakpoints on labels and list source code around labels, we need collect debug information for labels, i.e., label name, the function label belong, line number in the file, and the address label located. In order to keep these information in LLVM IR and to allow backend to generate debug information correctly. We create a new kind of metadata for labels, DILabel. The format of DILabel is !DILabel(scope: !1, name: "foo", file: !2, line: 3) We hope to keep debug information as much as possible even the code is optimized. So, we create a new kind of intrinsic for label metadata to avoid the metadata is eliminated with basic block. The intrinsic will keep existing if we keep it from optimized out. The format of the intrinsic is llvm.dbg.label(metadata !1) It has only one argument, that is the DILabel metadata. The intrinsic will follow the label immediately. Backend could get the label metadata through the intrinsic's parameter. We also create DIBuilder API for labels to be used by Frontend. Frontend could use createLabel() to allocate DILabel objects, and use insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR. Differential Revision: https://reviews.llvm.org/D45024 Patch by Hsiangkai Wang. llvm-svn: 331841
81 lines
3.8 KiB
LLVM
81 lines
3.8 KiB
LLVM
; The purpose of this test is to check that the remark emission analysis result
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; stays valid when it can and is invalidated otherwise. The code is just
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; a minimal amount of code to exercise the pass.
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;
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; First make sure we emit remarks on this test case.
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; RUN: opt %s -disable-output -aa-pipeline=basic-aa 2>&1 \
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; RUN: -passes='require<opt-remark-emit>,loop(licm)' \
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; RUN: -pass-remarks=licm -pass-remarks-with-hotness \
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; RUN: | FileCheck %s
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;
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; Check that passes which preserve BFI don't invalidate the emitter.
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; RUN: opt %s -disable-output -aa-pipeline=basic-aa 2>&1 \
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; RUN: -passes='require<opt-remark-emit>,instcombine,require<opt-remark-emit>,loop(licm)' -debug-pass-manager \
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; RUN: -pass-remarks=licm -pass-remarks-with-hotness \
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; RUN: | FileCheck %s --check-prefixes=CHECK,CHECK-PM-PRESERVE
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;
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; Check that invalidating BFI computes a fresh emitter.
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; RUN: opt %s -disable-output -aa-pipeline=basic-aa 2>&1 \
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; RUN: -passes='require<opt-remark-emit>,invalidate<block-freq>,require<opt-remark-emit>,loop(licm)' -debug-pass-manager \
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; RUN: -pass-remarks=licm -pass-remarks-with-hotness \
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; RUN: | FileCheck %s --check-prefixes=CHECK,CHECK-PM-INVALIDATE
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;
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; Check that invalidating BFI desn't compute a fresh emitter when we don't
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; request hotness remarks.
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; RUN: opt %s -disable-output -aa-pipeline=basic-aa 2>&1 \
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; RUN: -passes='require<opt-remark-emit>,invalidate<block-freq>,require<opt-remark-emit>,loop(licm)' -debug-pass-manager \
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; RUN: -pass-remarks=licm \
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; RUN: | FileCheck %s --check-prefixes=CHECK,CHECK-PM-NO-INVALIDATE
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target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
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define void @hoist(i32* %array, i32* noalias %p) {
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; CHECK-PM-PRESERVE: Running analysis: OptimizationRemarkEmitterAnalysis
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; CHECK-PM-PRESERVE: Running pass: InstCombinePass
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; CHECK-PM-PRESERVE-NOT: Invalidating analysis: OptimizationRemarkEmitterAnalysis
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; CHECK-PM-PRESERVE-NOT: Running analysis: OptimizationRemarkEmitterAnalysis
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; CHECK-PM-PRESERVE: Running pass: LICMPass
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; CHECK-PM-INVALIDATE: Running analysis: OptimizationRemarkEmitterAnalysis
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; CHECK-PM-INVALIDATE: Running pass: InvalidateAnalysisPass
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; CHECK-PM-INVALIDATE: Invalidating analysis: OptimizationRemarkEmitterAnalysis
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; CHECK-PM-INVALIDATE: Running analysis: OptimizationRemarkEmitterAnalysis
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; CHECK-PM-INVALIDATE: Running pass: LICMPass
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; CHECK-PM-NO-INVALIDATE: Running analysis: OptimizationRemarkEmitterAnalysis
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; CHECK-PM-NO-INVALIDATE: Running pass: InvalidateAnalysisPass
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; CHECK-PM-NO-INVALIDATE-NOT: Invalidating analysis: OptimizationRemarkEmitterAnalysis
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; CHECK-PM-NO-INVALIDATE-NOT: Running analysis: OptimizationRemarkEmitterAnalysis
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; CHECK-PM-NO-INVALIDATE: Running pass: LICMPass
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Entry:
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br label %Loop
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Loop:
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%j = phi i32 [ 0, %Entry ], [ %Next, %Loop ]
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%addr = getelementptr i32, i32* %array, i32 %j
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%a = load i32, i32* %addr
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; CHECK: remark: /tmp/kk.c:2:20: hoisting load
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%b = load i32, i32* %p, !dbg !8
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%a2 = add i32 %a, %b
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store i32 %a2, i32* %addr
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%Next = add i32 %j, 1
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%cond = icmp eq i32 %Next, 0
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br i1 %cond, label %Out, label %Loop
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Out:
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ret void
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}
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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_C99, file: !1, producer: "clang version 3.9.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: NoDebug, enums: !2)
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!1 = !DIFile(filename: "/tmp/kk.c", directory: "/tmp")
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!2 = !{}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{i32 1, !"PIC Level", i32 2}
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!5 = !{!"clang version 3.9.0 "}
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!6 = distinct !DISubprogram(name: "success", scope: !1, file: !1, line: 1, type: !7, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !2)
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!7 = !DISubroutineType(types: !2)
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!8 = !DILocation(line: 2, column: 20, scope: !6)
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