#include "SIShrinkInstructions.h"
#include "AMDGPU.h"
#include "GCNSubtarget.h"
#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
#include "Utils/AMDGPUBaseInfo.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineFunctionPass.h"

Macros
#define	DEBUG_TYPE "si-shrink-instructions"
	The pass tries to use the 32-bit encoding for instructions when possible.

Functions
	STATISTIC (NumInstructionsShrunk, "Number of 64-bit instruction reduced to 32-bit.")
	STATISTIC (NumLiteralConstantsFolded, "Number of literal constants folded into 32-bit instructions.")
static unsigned	canModifyToInlineImmOp32 (const SIInstrInfo *TII, const MachineOperand &Src, int32_t &ModifiedImm, bool Scalar)

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "si-shrink-instructions"

The pass tries to use the 32-bit encoding for instructions when possible.

Definition at line 19 of file SIShrinkInstructions.cpp.

Function Documentation

◆ canModifyToInlineImmOp32()

unsigned canModifyToInlineImmOp32	(	const SIInstrInfo *	TII,
		const MachineOperand &	Src,
		int32_t &	ModifiedImm,
		bool	Scalar )

static

Returns: the opcode of an instruction a move immediate of the constant Src can be replaced with if the constant is replaced with ModifiedImm. i.e.

If the bitreverse of a constant is an inline immediate, reverse the immediate and return the bitreverse opcode.

If the bitwise negation of a constant is an inline immediate, reverse the immediate and return the bitwise not opcode.

Definition at line 205 of file SIShrinkInstructions.cpp.

References llvm::reverseBits(), and TII.

◆ STATISTIC() [1/2]

STATISTIC	(	NumInstructionsShrunk	,
		"Number of 64-bit instruction reduced to 32-bit."	)

◆ STATISTIC() [2/2]

STATISTIC	(	NumLiteralConstantsFolded	,
		"Number of literal constants folded into 32-bit instructions."	)

References I, MI, MRI, Reg, llvm::Sub, SubReg, TII, and TRI.