class DeadArgumentEliminationPass

Declaration

class DeadArgumentEliminationPass : public PassInfoMixin { /* full declaration omitted */ };

Description

Eliminate dead arguments (and return values) from functions.

Declared at: llvm/include/llvm/Transforms/IPO/DeadArgumentElimination.h:38

Inherits from: PassInfoMixin

Member Variables

public llvm::DeadArgumentEliminationPass::UseMap Uses

This maps a return value or argument to any MaybeLive return values or arguments it uses. This allows the MaybeLive values to be marked live when any of its users is marked live. For example (indices are left out for clarity): - Uses[ret F] = ret G This means that F calls G, and F returns the value returned by G. - Uses[arg F] = ret G This means that some function calls G and passes its result as an argument to F. - Uses[ret F] = arg F This means that F returns one of its own arguments. - Uses[arg F] = arg G This means that G calls F and passes one of its own (G's) arguments directly to F.

public llvm::DeadArgumentEliminationPass::LiveSet LiveValues

This set contains all values that have been determined to be live.

public llvm::DeadArgumentEliminationPass::LiveFuncSet LiveFunctions

This set contains all values that are cannot be changed in any way.

public bool ShouldHackArguments = false

This allows this pass to do double-duty as the dead arg hacking pass (used only by bugpoint).

Method Overview

• public llvm::DeadArgumentEliminationPass::RetOrArg CreateArg(const llvm::Function * F, unsigned int Idx)
• public llvm::DeadArgumentEliminationPass::RetOrArg CreateRet(const llvm::Function * F, unsigned int Idx)
• public DeadArgumentEliminationPass(bool ShouldHackArguments_ = false)
• public llvm::PreservedAnalyses run(llvm::Module & M, llvm::ModuleAnalysisManager &)

Methods

¶llvm::DeadArgumentEliminationPass::RetOrArg
CreateArg(const llvm::Function* F,
          unsigned int Idx)

Description

Convenience wrapper

Declared at: llvm/include/llvm/Transforms/IPO/DeadArgumentElimination.h:87

Parameters

const llvm::Function* F

unsigned int Idx

¶llvm::DeadArgumentEliminationPass::RetOrArg
CreateRet(const llvm::Function* F,
          unsigned int Idx)

Description

Convenience wrapper

Declared at: llvm/include/llvm/Transforms/IPO/DeadArgumentElimination.h:82

Parameters

const llvm::Function* F

unsigned int Idx

¶DeadArgumentEliminationPass(
    bool ShouldHackArguments_ = false)

Declared at: llvm/include/llvm/Transforms/IPO/DeadArgumentElimination.h:76

Parameters

bool ShouldHackArguments_ = false

¶llvm::PreservedAnalyses run(
    llvm::Module& M,
    llvm::ModuleAnalysisManager&)

Declared at: llvm/include/llvm/Transforms/IPO/DeadArgumentElimination.h:79

Parameters

llvm::Module& M

llvm::ModuleAnalysisManager&