#include "llvm/Transforms/Scalar/DCE.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Transforms/Utils/Local.h"
#include "llvm/IR/InstIterator.h"
#include "llvm/IR/Instruction.h"
#include "llvm/Pass.h"
#include "llvm/Support/DebugCounter.h"
#include "llvm/Transforms/Scalar.h"

Include dependency graph for DCE.cpp:

Macros
#define	DEBUG_TYPE "dce"

Functions
	STATISTIC (DIEEliminated, "Number of insts removed by DIE pass")

	STATISTIC (DCEEliminated, "Number of insts removed")

	DEBUG_COUNTER (DCECounter, "dce-transform", "Controls which instructions are eliminated")

	INITIALIZE_PASS (DeadInstElimination, "die", "Dead Instruction Elimination", false, false) Pass *llvm

static bool	DCEInstruction (Instruction I, SmallSetVector< Instruction , 16 > &WorkList, const TargetLibraryInfo *TLI)

static bool	eliminateDeadCode (Function &F, TargetLibraryInfo *TLI)

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "dce"

Definition at line 31 of file DCE.cpp.

Function Documentation

◆ DCEInstruction()

static bool DCEInstruction	(	Instruction *	I,
		SmallSetVector< Instruction *, 16 > &	WorkList,
		const TargetLibraryInfo *	TLI
	)

static

Definition at line 81 of file DCE.cpp.

References llvm::Instruction::eraseFromParent(), llvm::User::getNumOperands(), llvm::User::getOperand(), llvm::SetVector< T, SmallVector< T, N >, SmallDenseSet< T, N > >::insert(), llvm::isInstructionTriviallyDead(), llvm::salvageDebugInfo(), llvm::User::setOperand(), llvm::DebugCounter::shouldExecute(), and llvm::Value::use_empty().

Referenced by eliminateDeadCode().

◆ DEBUG_COUNTER()

DEBUG_COUNTER	(	DCECounter	,
		"dce-transform"	,
		"Controls which instructions are eliminated"
	)

◆ eliminateDeadCode()

static bool eliminateDeadCode	(	Function &	F,
		TargetLibraryInfo *	TLI
	)

static

Definition at line 114 of file DCE.cpp.

References llvm::SetVector< T, SmallVector< T, N >, SmallDenseSet< T, N > >::count(), DCEInstruction(), llvm::SetVector< T, SmallVector< T, N >, SmallDenseSet< T, N > >::empty(), I, llvm::inst_begin(), llvm::inst_end(), and llvm::SetVector< T, SmallVector< T, N >, SmallDenseSet< T, N > >::pop_back_val().

Referenced by llvm::DCEPass::run().

◆ INITIALIZE_PASS()

INITIALIZE_PASS	(	DeadInstElimination	,
		"die"	,
		"Dead Instruction Elimination"	,
		false	,
		false
	)

Definition at line 74 of file DCE.cpp.