PruneEH.cpp File Reference

#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/CallGraph.h"
#include "llvm/Analysis/CallGraphSCCPass.h"
#include "llvm/Analysis/EHPersonalities.h"
#include "llvm/Transforms/Utils/Local.h"
#include "llvm/IR/CFG.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/InlineAsm.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/IPO.h"
#include <algorithm>

Include dependency graph for PruneEH.cpp:

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "prune-eh"

Functions
	STATISTIC (NumRemoved, "Number of invokes removed")
	STATISTIC (NumUnreach, "Number of noreturn calls optimized")
static bool	SimplifyFunction (Function *F, CallGraph &CG)
static void	DeleteBasicBlock (BasicBlock *BB, CallGraph &CG)
	DeleteBasicBlock - remove the specified basic block from the program, updating the callgraph to reflect any now-obsolete edges due to calls that exist in the BB. More...
	INITIALIZE_PASS_BEGIN (PruneEH, "prune-eh", "Remove unused exception handling info", false, false) INITIALIZE_PASS_END(PruneEH
static bool	runImpl (CallGraphSCC &SCC, CallGraph &CG)

Variables
prune	eh

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "prune-eh"

Definition at line 34 of file PruneEH.cpp.

Function Documentation

DeleteBasicBlock()

static void DeleteBasicBlock ( BasicBlock *  BB, CallGraph &  CG  )

static

DeleteBasicBlock - remove the specified basic block from the program, updating the callgraph to reflect any now-obsolete edges due to calls that exist in the BB.

Definition at line 231 of file PruneEH.cpp.

References assert(), llvm::BasicBlock::begin(), Callee, llvm::changeToUnreachable(), E, llvm::BasicBlock::end(), llvm::BasicBlock::eraseFromParent(), llvm::UndefValue::get(), llvm::Function::getIntrinsicID(), llvm::ilist_node_with_parent< NodeTy, ParentTy, Options >::getNextNode(), llvm::BasicBlock::getParent(), I, llvm::Function::isIntrinsic(), llvm::Intrinsic::isLeaf(), llvm::Instruction::isTerminator(), llvm::pred_empty(), llvm::CallGraphNode::removeCallEdgeFor(), llvm::succ_begin(), and llvm::succ_end().

Referenced by SimplifyFunction().

INITIALIZE_PASS_BEGIN()

INITIALIZE_PASS_BEGIN	(	PruneEH	,
		"prune-eh"	,
		"Remove unused exception handling info"	,
		false	,
		false
	)

runImpl()

static bool runImpl ( CallGraphSCC &  SCC, CallGraph &  CG  )

static

Definition at line 63 of file PruneEH.cpp.

References llvm::Function::addFnAttr(), Callee, llvm::SmallPtrSetImpl< PtrType >::count(), llvm::Function::doesNotReturn(), llvm::Function::doesNotThrow(), E, F(), llvm::GlobalValue::hasExactDefinition(), llvm::Function::hasFnAttribute(), I, llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::Instruction::mayThrow(), llvm::Attribute::Naked, llvm::Attribute::NoInline, llvm::Attribute::NoReturn, llvm::Attribute::NoUnwind, and SimplifyFunction().

SimplifyFunction()

static bool SimplifyFunction ( Function *  F, CallGraph &  CG  )

static

Definition at line 189 of file PruneEH.cpp.

References llvm::Function::begin(), llvm::canSimplifyInvokeNoUnwind(), DeleteBasicBlock(), E, llvm::Function::end(), I, llvm::pred_empty(), and llvm::removeUnwindEdge().

Referenced by runImpl().

STATISTIC() [1/2]

STATISTIC	(	NumRemoved	,
		"Number of invokes removed"
	)

STATISTIC() [2/2]

STATISTIC	(	NumUnreach	,
		"Number of noreturn calls optimized"
	)

Variable Documentation

eh

prune eh

Definition at line 58 of file PruneEH.cpp.