LiveDebugValues.cpp File Reference

The LiveDebugValues pass extends the range of variable locations (specified by DBG_VALUE instructions) from single blocks to successors and any other code locations where the variable location is valid. More...

#include "LiveDebugValues.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/TargetPassConfig.h"
#include "llvm/InitializePasses.h"
#include "llvm/Pass.h"
#include "llvm/PassRegistry.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/TargetParser/Triple.h"

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "livedebugvalues"

Functions
	INITIALIZE_PASS (LiveDebugValues, DEBUG_TYPE, "Live DEBUG_VALUE analysis", false, false) LiveDebugValues
	Default construct and initialize the pass.

Variables
static cl::opt< bool >	ForceInstrRefLDV ("force-instr-ref-livedebugvalues", cl::Hidden, cl::desc("Use instruction-ref based LiveDebugValues with " "normal DBG_VALUE inputs"), cl::init(false))
static cl::opt< cl::boolOrDefault >	ValueTrackingVariableLocations ("experimental-debug-variable-locations", cl::desc("Use experimental new value-tracking variable locations"))
static cl::opt< unsigned >	InputBBLimit ("livedebugvalues-input-bb-limit", cl::desc("Maximum input basic blocks before DBG_VALUE limit applies"), cl::init(10000), cl::Hidden)
static cl::opt< unsigned >	InputDbgValueLimit ("livedebugvalues-input-dbg-value-limit", cl::desc("Maximum input DBG_VALUE insts supported by debug range extension"), cl::init(50000), cl::Hidden)

Detailed Description

The LiveDebugValues pass extends the range of variable locations (specified by DBG_VALUE instructions) from single blocks to successors and any other code locations where the variable location is valid.

There are currently two implementations: the "VarLoc" implementation explicitly tracks the location of a variable, while the "InstrRef" implementation tracks the values defined by instructions through locations.

This file implements neither; it merely registers the pass, allows the user to pick which implementation will be used to propagate variable locations.

Definition in file LiveDebugValues.cpp.

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "livedebugvalues"

Definition at line 36 of file LiveDebugValues.cpp.

Function Documentation

INITIALIZE_PASS()

INITIALIZE_PASS	(	LiveDebugValues	,
		DEBUG_TYPE	,
		"Live DEBUG_VALUE analysis"	,
		false	,
		false
	)

Default construct and initialize the pass.

Definition at line 93 of file LiveDebugValues.cpp.

References llvm::PassRegistry::getPassRegistry(), llvm::initializeLiveDebugValuesPass(), llvm::makeInstrRefBasedLiveDebugValues(), and llvm::makeVarLocBasedLiveDebugValues().

Variable Documentation

ForceInstrRefLDV

cl::opt< bool > ForceInstrRefLDV("force-instr-ref-livedebugvalues", cl::Hidden, cl::desc("Use instruction-ref based LiveDebugValues with " "normal DBG_VALUE inputs"), cl::init(false)) ( "force-instr-ref-livedebugvalues"  , cl::Hidden  , cl::desc("Use instruction-ref based LiveDebugValues with " "normal DBG_VALUE inputs")  , cl::init(false)    )

static

InputBBLimit

cl::opt< unsigned > InputBBLimit("livedebugvalues-input-bb-limit", cl::desc("Maximum input basic blocks before DBG_VALUE limit applies"), cl::init(10000), cl::Hidden) ( "livedebugvalues-input-bb-limit"  , cl::desc("Maximum input basic blocks before DBG_VALUE limit applies")  , cl::init(10000)  , cl::Hidden    )

static

InputDbgValueLimit

cl::opt< unsigned > InputDbgValueLimit("livedebugvalues-input-dbg-value-limit", cl::desc( "Maximum input DBG_VALUE insts supported by debug range extension"), cl::init(50000), cl::Hidden) ( "livedebugvalues-input-dbg-value-limit"  , cl::desc( "Maximum input DBG_VALUE insts supported by debug range extension")  , cl::init(50000)  , cl::Hidden    )

static

ValueTrackingVariableLocations

cl::opt< cl::boolOrDefault > ValueTrackingVariableLocations("experimental-debug-variable-locations", cl::desc("Use experimental new value-tracking variable locations")) ( "experimental-debug-variable-locations"  , cl::desc("Use experimental new value-tracking variable locations")    )

static

Referenced by llvm::debuginfoShouldUseDebugInstrRef().