WebAssemblyExplicitLocals.cpp File Reference

This file converts any remaining registers into WebAssembly locals. More...

#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
#include "WebAssembly.h"
#include "WebAssemblyDebugValueManager.h"
#include "WebAssemblyMachineFunctionInfo.h"
#include "WebAssemblySubtarget.h"
#include "WebAssemblyUtilities.h"
#include "llvm/CodeGen/MachineBlockFrequencyInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "wasm-explicit-locals"

Functions
	INITIALIZE_PASS (WebAssemblyExplicitLocals, DEBUG_TYPE, "Convert registers to WebAssembly locals", false, false) FunctionPass *llvm
static void	checkFrameBase (WebAssemblyFunctionInfo &MFI, unsigned Local, unsigned Reg)
static unsigned	getLocalId (DenseMap< unsigned, unsigned > &Reg2Local, WebAssemblyFunctionInfo &MFI, unsigned &CurLocal, unsigned Reg)
	Return a local id number for the given register, assigning it a new one if it doesn't yet have one.
static unsigned	getDropOpcode (const TargetRegisterClass *RC)
	Get the appropriate drop opcode for the given register class.
static unsigned	getLocalGetOpcode (const TargetRegisterClass *RC)
	Get the appropriate local.get opcode for the given register class.
static unsigned	getLocalSetOpcode (const TargetRegisterClass *RC)
	Get the appropriate local.set opcode for the given register class.
static unsigned	getLocalTeeOpcode (const TargetRegisterClass *RC)
	Get the appropriate local.tee opcode for the given register class.
static MVT	typeForRegClass (const TargetRegisterClass *RC)
	Get the type associated with the given register class.
static MachineInstr *	findStartOfTree (MachineOperand &MO, MachineRegisterInfo &MRI, const WebAssemblyFunctionInfo &MFI)
	Given a MachineOperand of a stackified vreg, return the instruction at the start of the expression tree.
static void	removeFakeUses (MachineFunction &MF)

Detailed Description

This file converts any remaining registers into WebAssembly locals.

After register stackification and register coloring, convert non-stackified registers into locals, inserting explicit local.get and local.set instructions.

Definition in file WebAssemblyExplicitLocals.cpp.

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "wasm-explicit-locals"

Definition at line 32 of file WebAssemblyExplicitLocals.cpp.

Function Documentation

checkFrameBase()

void checkFrameBase ( WebAssemblyFunctionInfo & MFI, unsigned Local, unsigned Reg )

static

Definition at line 62 of file WebAssemblyExplicitLocals.cpp.

References llvm::dbgs(), llvm::WebAssemblyFunctionInfo::getFrameBaseVreg(), llvm::WebAssemblyFunctionInfo::isFrameBaseVirtual(), LLVM_DEBUG, Local, Reg, Register, and llvm::WebAssemblyFunctionInfo::setFrameBaseLocal().

Referenced by getLocalId().

findStartOfTree()

MachineInstr * findStartOfTree ( MachineOperand & MO, MachineRegisterInfo & MRI, const WebAssemblyFunctionInfo & MFI )

static

Given a MachineOperand of a stackified vreg, return the instruction at the start of the expression tree.

Definition at line 194 of file WebAssemblyExplicitLocals.cpp.

References assert(), findStartOfTree(), llvm::MachineOperand::getReg(), llvm::WebAssemblyFunctionInfo::isVRegStackified(), MRI, and Reg.

Referenced by findStartOfTree().

getDropOpcode()

unsigned getDropOpcode ( const TargetRegisterClass * RC )

static

Get the appropriate drop opcode for the given register class.

Definition at line 88 of file WebAssemblyExplicitLocals.cpp.

References llvm_unreachable.

getLocalGetOpcode()

unsigned getLocalGetOpcode ( const TargetRegisterClass * RC )

static

Get the appropriate local.get opcode for the given register class.

Definition at line 109 of file WebAssemblyExplicitLocals.cpp.

References llvm_unreachable.

getLocalId()

unsigned getLocalId ( DenseMap< unsigned, unsigned > & Reg2Local, WebAssemblyFunctionInfo & MFI, unsigned & CurLocal, unsigned Reg )

static

Return a local id number for the given register, assigning it a new one if it doesn't yet have one.

Definition at line 76 of file WebAssemblyExplicitLocals.cpp.

References checkFrameBase(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::insert(), P, and Reg.

getLocalSetOpcode()

unsigned getLocalSetOpcode ( const TargetRegisterClass * RC )

static

Get the appropriate local.set opcode for the given register class.

Definition at line 130 of file WebAssemblyExplicitLocals.cpp.

References llvm_unreachable.

getLocalTeeOpcode()

unsigned getLocalTeeOpcode ( const TargetRegisterClass * RC )

static

Get the appropriate local.tee opcode for the given register class.

Definition at line 151 of file WebAssemblyExplicitLocals.cpp.

References llvm_unreachable.

INITIALIZE_PASS()

INITIALIZE_PASS	(	WebAssemblyExplicitLocals	,
		DEBUG_TYPE	,
		"Convert registers to WebAssembly locals"	,
		false	,
		false	)

Definition at line 55 of file WebAssemblyExplicitLocals.cpp.

References llvm::createWebAssemblyExplicitLocals(), and DEBUG_TYPE.

removeFakeUses()

void removeFakeUses ( MachineFunction & MF )

static

Definition at line 221 of file WebAssemblyExplicitLocals.cpp.

References MBB, MI, and llvm::SmallVectorTemplateBase< T, bool >::push_back().

typeForRegClass()

MVT typeForRegClass ( const TargetRegisterClass * RC )

static

Get the type associated with the given register class.

Definition at line 172 of file WebAssemblyExplicitLocals.cpp.

References llvm_unreachable.