74b99b5c2e
Previously we reliedy on pseudo probe descriptors to look up precomputed GUID during probe emission for inlined probes. Since we are moving to always using unique linkage names, GUID for functions can be computed in place from dwarf names. This eliminates the need of importing pseudo probe descs in thinlto, since those descs should be emitted by the original modules. This significantly reduces thinlto memory footprint in some extreme case where the number of imported modules for a single module is massive. Test Plan: Reviewed By: wenlei Differential Revision: https://reviews.llvm.org/D105248
47 lines
1.5 KiB
C++
47 lines
1.5 KiB
C++
//===- PseudoProbePrinter.h - Pseudo probe encoding support -----*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains support for writing pseudo probe info into asm files.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_PSEUDOPROBEPRINTER_H
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#define LLVM_LIB_CODEGEN_ASMPRINTER_PSEUDOPROBEPRINTER_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/CodeGen/AsmPrinterHandler.h"
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namespace llvm {
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class AsmPrinter;
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class MCStreamer;
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class Module;
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class DILocation;
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class PseudoProbeHandler : public AsmPrinterHandler {
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// Target of pseudo probe emission.
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AsmPrinter *Asm;
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public:
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PseudoProbeHandler(AsmPrinter *A) : Asm(A){};
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void emitPseudoProbe(uint64_t Guid, uint64_t Index, uint64_t Type,
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uint64_t Attr, const DILocation *DebugLoc);
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// Unused.
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void setSymbolSize(const MCSymbol *Sym, uint64_t Size) override {}
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void endModule() override {}
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void beginFunction(const MachineFunction *MF) override {}
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void endFunction(const MachineFunction *MF) override {}
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void beginInstruction(const MachineInstr *MI) override {}
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void endInstruction() override {}
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};
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} // namespace llvm
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#endif // LLVM_LIB_CODEGEN_ASMPRINTER_PSEUDOPROBEPRINTER_H
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