PPCBranchSelector.cpp File Reference

#include "MCTargetDesc/PPCPredicates.h"
#include "PPC.h"
#include "PPCInstrInfo.h"
#include "PPCSubtarget.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Target/TargetMachine.h"
#include <algorithm>

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "ppc-branch-select"

Functions
	STATISTIC (NumExpanded, "Number of branches expanded to long format")
	STATISTIC (NumPrefixed, "Number of prefixed instructions")
	STATISTIC (NumPrefixedAligned, "Number of prefixed instructions that have been aligned")
	INITIALIZE_PASS (PPCBSel, "ppc-branch-select", "PowerPC Branch Selector", false, false) FunctionPass *llvm
	createPPCBranchSelectionPass - returns an instance of the Branch Selection Pass
static unsigned	GetInitialOffset (MachineFunction &Fn)
	We need to be careful about the offset of the first block in the function because it might not have the function's alignment.

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "ppc-branch-select"

Definition at line 30 of file PPCBranchSelector.cpp.

Function Documentation

GetInitialOffset()

unsigned GetInitialOffset ( MachineFunction & Fn )

inlinestatic

We need to be careful about the offset of the first block in the function because it might not have the function's alignment.

This happens because, under the ELFv2 ABI, for functions which require a TOC pointer, we add a two-instruction sequence to the start of the function. Note: This needs to be synchronized with the check in PPCLinuxAsmPrinter::EmitFunctionBodyStart.

Definition at line 105 of file PPCBranchSelector.cpp.

References llvm::MachineFunction::getRegInfo(), llvm::MachineFunction::getSubtarget(), llvm::PPCSubtarget::isELFv2ABI(), and llvm::MachineRegisterInfo::use_empty().

INITIALIZE_PASS()

INITIALIZE_PASS	(	PPCBSel	,
		"ppc-branch-select"	,
		"PowerPC Branch Selector"	,
		false	,
		false	)

createPPCBranchSelectionPass - returns an instance of the Branch Selection Pass

Definition at line 69 of file PPCBranchSelector.cpp.

References llvm::createPPCBranchSelectionPass().

STATISTIC() [1/3]

STATISTIC	(	NumExpanded	,
		"Number of branches expanded to long format"	)

STATISTIC() [2/3]

STATISTIC	(	NumPrefixed	,
		"Number of prefixed instructions"	)

STATISTIC() [3/3]

STATISTIC	(	NumPrefixedAligned	,
		"Number of prefixed instructions that have been aligned"	)