SimplifyCFGPass.cpp File Reference

#include "llvm/Transforms/Scalar.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/AssumptionTracker.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/CFG.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Module.h"
#include "llvm/Pass.h"
#include "llvm/Transforms/Utils/Local.h"

Include dependency graph for SimplifyCFGPass.cpp:

Go to the source code of this file.

Defines
#define	DEBUG_TYPE   "simplifycfg"
Functions
	STATISTIC (NumSimpl,"Number of blocks simplified")
	INITIALIZE_PASS_BEGIN (CFGSimplifyPass,"simplifycfg","Simplify the CFG", false, false) INITIALIZE_PASS_END(CFGSimplifyPass
static bool	mergeEmptyReturnBlocks (Function &F)
static bool	iterativelySimplifyCFG (Function &F, const TargetTransformInfo &TTI, const DataLayout *DL, AssumptionTracker *AT)
Variables
	simplifycfg
Simplify the	CFG
Simplify the	false

---

Define Documentation

#define DEBUG_TYPE   "simplifycfg"

Definition at line 41 of file SimplifyCFGPass.cpp.

---

Function Documentation

INITIALIZE_PASS_BEGIN	(	CFGSimplifyPass	,
		"simplifycfg"	,
		"Simplify the CFG"	,
		false	,
		false
	)

static bool iterativelySimplifyCFG	(	Function &	F,
		const TargetTransformInfo &	TTI,
		const DataLayout *	DL,
		AssumptionTracker *	AT
	)		[static]

iterativelySimplifyCFG - Call SimplifyCFG on all the blocks in the function, iterating until no more changes are made.

Definition at line 151 of file SimplifyCFGPass.cpp.

References llvm::Function::begin(), llvm::Function::end(), and llvm::SimplifyCFG().

static bool mergeEmptyReturnBlocks

(

Function &

F

)

[static]

mergeEmptyReturnBlocks - If we have more than one empty (other than phi node) return blocks, merge them together to promote recursive block merging.

Definition at line 75 of file SimplifyCFGPass.cpp.

References llvm::PHINode::addIncoming(), llvm::BasicBlock::begin(), llvm::Function::begin(), llvm::PHINode::Create(), llvm::BranchInst::Create(), llvm::dyn_cast(), llvm::Function::end(), llvm::Instruction::eraseFromParent(), llvm::BasicBlock::eraseFromParent(), llvm::BasicBlock::front(), llvm::User::getNumOperands(), llvm::User::getOperand(), llvm::BasicBlock::getTerminator(), llvm::Value::getType(), I, llvm::pred_begin(), llvm::pred_end(), llvm::Value::replaceAllUsesWith(), llvm::MipsISD::Ret, and llvm::User::setOperand().

STATISTIC	(	NumSimpl	,
		"Number of blocks simplified"
	)

---

Variable Documentation

Simplify the CFG

Definition at line 65 of file SimplifyCFGPass.cpp.

Simplify the false

Definition at line 65 of file SimplifyCFGPass.cpp.

simplifycfg

Definition at line 65 of file SimplifyCFGPass.cpp.