LoopUnrollPass.cpp File Reference

#include "llvm/Transforms/Scalar.h"
#include "llvm/Analysis/AssumptionTracker.h"
#include "llvm/Analysis/CodeMetrics.h"
#include "llvm/Analysis/FunctionTargetTransformInfo.h"
#include "llvm/Analysis/LoopPass.h"
#include "llvm/Analysis/ScalarEvolution.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Metadata.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/Utils/UnrollLoop.h"
#include <climits>

Include dependency graph for LoopUnrollPass.cpp:

Go to the source code of this file.

Defines
#define	DEBUG_TYPE   "loop-unroll"
Functions
static unsigned	ApproximateLoopSize (const Loop *L, unsigned &NumCalls, bool &NotDuplicatable, const TargetTransformInfo &TTI, AssumptionTracker *AT)
	ApproximateLoopSize - Approximate the size of the loop.
static const MDNode *	GetUnrollMetadata (const Loop *L, StringRef Name)
static bool	HasUnrollFullPragma (const Loop *L)
static bool	HasUnrollDisablePragma (const Loop *L)
static unsigned	UnrollCountPragmaValue (const Loop *L)
static void	SetLoopAlreadyUnrolled (Loop *L)
Variables
static cl::opt< unsigned >	UnrollThreshold ("unroll-threshold", cl::init(150), cl::Hidden, cl::desc("The cut-off point for automatic loop unrolling"))
static cl::opt< unsigned >	UnrollCount ("unroll-count", cl::init(0), cl::Hidden, cl::desc("Use this unroll count for all loops including those with ""unroll_count pragma values, for testing purposes"))
static cl::opt< bool >	UnrollAllowPartial ("unroll-allow-partial", cl::init(false), cl::Hidden, cl::desc("Allows loops to be partially unrolled until ""-unroll-threshold loop size is reached."))
static cl::opt< bool >	UnrollRuntime ("unroll-runtime", cl::ZeroOrMore, cl::init(false), cl::Hidden, cl::desc("Unroll loops with run-time trip counts"))
static cl::opt< unsigned >	PragmaUnrollThreshold ("pragma-unroll-threshold", cl::init(16 *1024), cl::Hidden, cl::desc("Unrolled size limit for loops with an unroll(full) or ""unroll_count pragma."))

---

Define Documentation

#define DEBUG_TYPE   "loop-unroll"

Definition at line 35 of file LoopUnrollPass.cpp.

---

Function Documentation

static unsigned ApproximateLoopSize	(	const Loop *	L,
		unsigned &	NumCalls,
		bool &	NotDuplicatable,
		const TargetTransformInfo &	TTI,
		AssumptionTracker *	AT
	)		[static]

ApproximateLoopSize - Approximate the size of the loop.

Definition at line 207 of file LoopUnrollPass.cpp.

References llvm::CodeMetrics::analyzeBasicBlock(), llvm::LoopBase< BlockT, LoopT >::block_begin(), llvm::LoopBase< BlockT, LoopT >::block_end(), llvm::CodeMetrics::collectEphemeralValues(), I, Metrics, llvm::CodeMetrics::notDuplicatable, llvm::CodeMetrics::NumInlineCandidates, and llvm::CodeMetrics::NumInsts.

static const MDNode* GetUnrollMetadata	(	const Loop *	L,
		StringRef	Name
	)		[static]

Definition at line 234 of file LoopUnrollPass.cpp.

References llvm::dyn_cast(), llvm::StringRef::equals(), llvm::Loop::getLoopID(), llvm::MDNode::getNumOperands(), llvm::MDNode::getOperand(), and llvm::MDString::getString().

Referenced by HasUnrollDisablePragma(), HasUnrollFullPragma(), and UnrollCountPragmaValue().

static bool HasUnrollDisablePragma

(

const Loop *

L

)

[static]

Definition at line 264 of file LoopUnrollPass.cpp.

References GetUnrollMetadata().

static bool HasUnrollFullPragma

(

const Loop *

L

)

[static]

Definition at line 259 of file LoopUnrollPass.cpp.

References GetUnrollMetadata().

static void SetLoopAlreadyUnrolled

(

Loop *

L

)

[static]

Definition at line 286 of file LoopUnrollPass.cpp.

References llvm::dyn_cast(), llvm::MDString::get(), llvm::MDNode::get(), llvm::BasicBlock::getContext(), llvm::LoopBase< BlockT, LoopT >::getHeader(), llvm::Loop::getLoopID(), llvm::MDNode::getNumOperands(), llvm::MDNode::getOperand(), llvm::MDString::getString(), llvm::SmallVectorTemplateBase< T, isPodLike >::push_back(), llvm::SmallVectorTemplateBase< T, isPodLike< T >::value >::push_back(), llvm::MDNode::replaceOperandWith(), llvm::Loop::setLoopID(), and llvm::StringRef::startswith().

static unsigned UnrollCountPragmaValue

(

const Loop *

L

)

[static]

Definition at line 270 of file LoopUnrollPass.cpp.

References llvm::MDNode::getNumOperands(), llvm::MDNode::getOperand(), and GetUnrollMetadata().

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Variable Documentation

cl::opt<unsigned> PragmaUnrollThreshold("pragma-unroll-threshold", cl::init(16 *1024), cl::Hidden, cl::desc("Unrolled size limit for loops with an unroll(full) or ""unroll_count pragma.")) [static]

cl::opt<bool> UnrollAllowPartial("unroll-allow-partial", cl::init(false), cl::Hidden, cl::desc("Allows loops to be partially unrolled until ""-unroll-threshold loop size is reached.")) [static]

cl::opt<unsigned> UnrollCount("unroll-count", cl::init(0), cl::Hidden, cl::desc("Use this unroll count for all loops including those with ""unroll_count pragma values, for testing purposes")) [static]

cl::opt<bool> UnrollRuntime("unroll-runtime", cl::ZeroOrMore, cl::init(false), cl::Hidden, cl::desc("Unroll loops with run-time trip counts")) [static]

cl::opt<unsigned> UnrollThreshold("unroll-threshold", cl::init(150), cl::Hidden, cl::desc("The cut-off point for automatic loop unrolling")) [static]