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.

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()

static 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, llvm::WebAssemblyFunctionInfo::setFrameBaseLocal(), and llvm::Register::virtReg2Index().

Referenced by getLocalId().

findStartOfTree()

static 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(), and MRI.

Referenced by findStartOfTree().

getDropOpcode()

static 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()

static 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()

static 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(), and P.

getLocalSetOpcode()

static 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()

static 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.

typeForRegClass()

static 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.