LLVM: lib/Transforms/Scalar/MemCpyOptimizer.cpp File Reference (original) (raw)

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Macros
#define	DEBUG_TYPE "memcpyopt"

Functions
	STATISTIC (NumMemCpyInstr, "Number of memcpy instructions deleted")
	STATISTIC (NumMemMoveInstr, "Number of memmove instructions deleted")
	STATISTIC (NumMemSetInfer, "Number of memsets inferred")
	STATISTIC (NumMoveToCpy, "Number of memmoves converted to memcpy")
	STATISTIC (NumCpyToSet, "Number of memcpys converted to memset")
	STATISTIC (NumCallSlot, "Number of call slot optimizations performed")
	STATISTIC (NumStackMove, "Number of stack-move optimizations performed")
static bool	overreadUndefContents (MemorySSA MSSA, MemCpyInst MemCpy, MemIntrinsic *MemSrc, BatchAAResults &BAA)
static bool	mayBeVisibleThroughUnwinding (Value V, Instruction Start, Instruction *End)
static bool	accessedBetween (BatchAAResults &AA, MemoryLocation Loc, const MemoryUseOrDef Start, const MemoryUseOrDef End, Instruction **SkippedLifetimeStart=nullptr)
static bool	writtenBetween (MemorySSA MSSA, BatchAAResults &AA, MemoryLocation Loc, const MemoryUseOrDef Start, const MemoryUseOrDef *End)
static bool	hasUndefContents (MemorySSA MSSA, BatchAAResults &AA, Value V, MemoryDef *Def)
	Determine whether the pointer V had only undefined content (due to Def), either because it was freshly alloca'd or started its lifetime.
static bool	isZeroSize (Value *Size)

◆ DEBUG_TYPE

#define DEBUG_TYPE "memcpyopt"

◆ accessedBetween()

◆ hasUndefContents()

◆ isZeroSize()

◆ mayBeVisibleThroughUnwinding()

◆ overreadUndefContents()

◆ STATISTIC() [1/7]

STATISTIC	(	NumCallSlot	,
"Number of call slot optimizations performed"	)

◆ STATISTIC() [2/7]

STATISTIC	(	NumCpyToSet	,
"Number of memcpys converted to memset"	)

◆ STATISTIC() [3/7]

STATISTIC	(	NumMemCpyInstr	,
"Number of memcpy instructions deleted"	)

◆ STATISTIC() [4/7]

STATISTIC	(	NumMemMoveInstr	,
"Number of memmove instructions deleted"	)

◆ STATISTIC() [5/7]

STATISTIC	(	NumMemSetInfer	,
"Number of memsets inferred"	)

◆ STATISTIC() [6/7]

STATISTIC	(	NumMoveToCpy	,
"Number of memmoves converted to memcpy"	)

◆ STATISTIC() [7/7]

STATISTIC	(	NumStackMove	,
"Number of stack-move optimizations performed"	)

References DL.

◆ writtenBetween()

◆ EnableMemCpyOptWithoutLibcalls

cl::opt< bool > EnableMemCpyOptWithoutLibcalls("enable-memcpyopt-without-libcalls", cl::Hidden, cl::desc("Enable memcpyopt even when libcalls are disabled")) ( "enable-memcpyopt-without-libcalls" , cl::Hidden , cl::desc("Enable memcpyopt even when libcalls are disabled") )	static