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2501ed842c
This patch optimizes two memory intrinsic operations: memset and memcpy based
on the profiled size of the operation. The high level transformation is like:
mem_op(..., size)
==>
switch (size) {
case s1:
mem_op(..., s1);
goto merge_bb;
case s2:
mem_op(..., s2);
goto merge_bb;
...
default:
mem_op(..., size);
goto merge_bb;
}
merge_bb:
Differential Revision: http://reviews.llvm.org/D28966
llvm-svn: 299446
62 lines
2.0 KiB
C++
62 lines
2.0 KiB
C++
//===- Transforms/PGOInstrumentation.h - PGO gen/use passes ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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/// \file
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/// This file provides the interface for IR based instrumentation passes (
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/// (profile-gen, and profile-use).
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_PGOINSTRUMENTATION_H
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#define LLVM_TRANSFORMS_PGOINSTRUMENTATION_H
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#include "llvm/IR/PassManager.h"
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#include "llvm/Transforms/Instrumentation.h"
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namespace llvm {
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/// The instrumentation (profile-instr-gen) pass for IR based PGO.
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class PGOInstrumentationGen : public PassInfoMixin<PGOInstrumentationGen> {
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public:
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PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
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};
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/// The profile annotation (profile-instr-use) pass for IR based PGO.
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class PGOInstrumentationUse : public PassInfoMixin<PGOInstrumentationUse> {
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public:
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PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
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PGOInstrumentationUse(std::string Filename = "");
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private:
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std::string ProfileFileName;
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};
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/// The indirect function call promotion pass.
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class PGOIndirectCallPromotion : public PassInfoMixin<PGOIndirectCallPromotion> {
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public:
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PGOIndirectCallPromotion(bool IsInLTO = false, bool SamplePGO = false)
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: InLTO(IsInLTO), SamplePGO(SamplePGO) {}
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PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
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private:
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bool InLTO;
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bool SamplePGO;
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};
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/// The profile size based optimization pass for memory intrinsics.
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class PGOMemOPSizeOpt : public PassInfoMixin<PGOMemOPSizeOpt> {
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public:
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PGOMemOPSizeOpt() {}
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PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
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};
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void setProfMetadata(Module *M, Instruction *TI, ArrayRef<uint64_t> EdgeCounts,
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uint64_t MaxCount);
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} // End llvm namespace
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#endif
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