class LibCallSimplifier

Declaration

class LibCallSimplifier { /* full declaration omitted */ };

Description

LibCallSimplifier - This class implements a collection of optimizations that replace well formed calls to library functions with a more optimal form. For example, replacing 'printf("Hello!")' with 'puts("Hello!")'.

Declared at: llvm/include/llvm/Transforms/Utils/SimplifyLibCalls.h:100

Method Overview

• public LibCallSimplifier(const llvm::DataLayout & DL, const llvm::TargetLibraryInfo * TLI, llvm::OptimizationRemarkEmitter & ORE, llvm::BlockFrequencyInfo * BFI, llvm::ProfileSummaryInfo * PSI, function_ref<void (llvm::Instruction *, llvm::Value *)> Replacer = &replaceAllUsesWithDefault, function_ref<void (llvm::Instruction *)> Eraser = &eraseFromParentDefault)
• public llvm::Value * optimizeCall(llvm::CallInst * CI)

Methods

¶LibCallSimplifier(
    const llvm::DataLayout& DL,
    const llvm::TargetLibraryInfo* TLI,
    llvm::OptimizationRemarkEmitter& ORE,
    llvm::BlockFrequencyInfo* BFI,
    llvm::ProfileSummaryInfo* PSI,
    function_ref<void(llvm::Instruction*,
                      llvm::Value*)> Replacer =
        &replaceAllUsesWithDefault,
    function_ref<void(llvm::Instruction*)>
        Eraser = &eraseFromParentDefault)

Declared at: llvm/include/llvm/Transforms/Utils/SimplifyLibCalls.h:138

Parameters

const llvm::DataLayout& DL

const llvm::TargetLibraryInfo* TLI

llvm::OptimizationRemarkEmitter& ORE

llvm::BlockFrequencyInfo* BFI

llvm::ProfileSummaryInfo* PSI

function_ref<void(llvm::Instruction*, llvm::Value*)> Replacer = &replaceAllUsesWithDefault

function_ref<void(llvm::Instruction*)> Eraser = &eraseFromParentDefault

¶llvm::Value* optimizeCall(llvm::CallInst* CI)

Description

optimizeCall - Take the given call instruction and return a more optimal value to replace the instruction with or 0 if a more optimal form can't be found. Note that the returned value may be equal to the instruction being optimized. In this case all other instructions that use the given instruction were modified and the given instruction is dead. The call must not be an indirect call.

Declared at: llvm/include/llvm/Transforms/Utils/SimplifyLibCalls.h:153

Parameters

llvm::CallInst* CI