LoopVectorizationPlanner.cpp File Reference

This file implements VFSelectionContext methods for loop vectorization VF selection, independent of cost-modeling decisions. More...

#include "LoopVectorizationPlanner.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/OptimizationRemarkEmitter.h"
#include "llvm/Analysis/ScalarEvolution.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Transforms/Vectorize/LoopVectorizationLegality.h"
#include "llvm/Transforms/Vectorize/LoopVectorize.h"

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "loop-vectorize"

Variables
static cl::opt< bool >	MaximizeBandwidth ("vectorizer-maximize-bandwidth", cl::init(false), cl::Hidden, cl::desc("Maximize bandwidth when selecting vectorization factor which " "will be determined by the smallest type in loop."))
static cl::opt< bool >	UseWiderVFIfCallVariantsPresent ("vectorizer-maximize-bandwidth-for-vector-calls", cl::init(true), cl::Hidden, cl::desc("Try wider VFs if they enable the use of vector variants"))
static cl::opt< bool >	ConsiderRegPressure ("vectorizer-consider-reg-pressure", cl::init(false), cl::Hidden, cl::desc("Discard VFs if their register pressure is too high."))
static cl::opt< bool >	ForceTargetSupportsScalableVectors ("force-target-supports-scalable-vectors", cl::init(false), cl::Hidden, cl::desc("Pretend that scalable vectors are supported, even if the target does " "not support them. This flag should only be used for testing."))
static cl::opt< bool >	ForceTargetSupportsMaskedMemoryOps ("force-target-supports-masked-memory-ops", cl::init(false), cl::Hidden, cl::desc("Assume the target supports masked memory operations (used for " "testing)."))
	Note: This currently only applies to llvm.masked.load and llvm.masked.store.

Detailed Description

This file implements VFSelectionContext methods for loop vectorization VF selection, independent of cost-modeling decisions.

Definition in file LoopVectorizationPlanner.cpp.

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "loop-vectorize"

Definition at line 28 of file LoopVectorizationPlanner.cpp.

Variable Documentation

ConsiderRegPressure

cl::opt< bool > ConsiderRegPressure("vectorizer-consider-reg-pressure", cl::init(false), cl::Hidden, cl::desc("Discard VFs if their register pressure is too high.")) ( "vectorizer-consider-reg-pressure" , cl::init(false) , cl::Hidden , cl::desc("Discard VFs if their register pressure is too high.")  )

static

Referenced by llvm::LoopVectorizationPlanner::computeBestVF(), and llvm::VFSelectionContext::shouldConsiderRegPressureForVF().

ForceTargetSupportsMaskedMemoryOps

cl::opt< bool > ForceTargetSupportsMaskedMemoryOps("force-target-supports-masked-memory-ops", cl::init(false), cl::Hidden, cl::desc("Assume the target supports masked memory operations (used for " "testing).")) ( "force-target-supports-masked-memory-ops" , cl::init(false) , cl::Hidden , cl::desc("Assume the target supports masked memory operations (used for " "testing).")  )

static

Note: This currently only applies to llvm.masked.load and llvm.masked.store.

TODO: Extend this to cover other operations as needed.

Referenced by llvm::VFSelectionContext::isLegalMaskedLoad(), and llvm::VFSelectionContext::isLegalMaskedStore().

ForceTargetSupportsScalableVectors

cl::opt< bool > ForceTargetSupportsScalableVectors("force-target-supports-scalable-vectors", cl::init(false), cl::Hidden, cl::desc( "Pretend that scalable vectors are supported, even if the target does " "not support them. This flag should only be used for testing.")) ( "force-target-supports-scalable-vectors" , cl::init(false) , cl::Hidden , cl::desc( "Pretend that scalable vectors are supported, even if the target does " "not support them. This flag should only be used for testing.")  )

static

Referenced by llvm::VFSelectionContext::supportsScalableVectors().

MaximizeBandwidth

cl::opt< bool > MaximizeBandwidth("vectorizer-maximize-bandwidth", cl::init(false), cl::Hidden, cl::desc("Maximize bandwidth when selecting vectorization factor which " "will be determined by the smallest type in loop.")) ( "vectorizer-maximize-bandwidth" , cl::init(false) , cl::Hidden , cl::desc("Maximize bandwidth when selecting vectorization factor which " "will be determined by the smallest type in loop.")  )

static

UseWiderVFIfCallVariantsPresent

cl::opt< bool > UseWiderVFIfCallVariantsPresent("vectorizer-maximize-bandwidth-for-vector-calls", cl::init(true), cl::Hidden, cl::desc("Try wider VFs if they enable the use of vector variants")) ( "vectorizer-maximize-bandwidth-for-vector-calls" , cl::init(true) , cl::Hidden , cl::desc("Try wider VFs if they enable the use of vector variants")  )

static