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[NVPTX] Cut down on physical register defs 

We are using virtual registers throughout now, but we still need
to keep a few physical registers per class around to keep the
infrastructure happy.

llvm-svn: 185334
This commit is contained in:
Justin Holewinski 2013-07-01 12:59:06 +00:00
parent 51cb1349dc
commit 8fab95d5cc
3 changed files with 13 additions and 28 deletions
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1
llvm/lib/Target/NVPTX/NVPTXAsmPrinter.cpp
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@ -16,7 +16,6 @@
#include "MCTargetDesc/NVPTXMCAsmInfo.h"
#include "NVPTX.h"
#include "NVPTXInstrInfo.h"
#include "NVPTXNumRegisters.h"
#include "NVPTXRegisterInfo.h"
#include "NVPTXTargetMachine.h"
#include "NVPTXUtilities.h"

16
llvm/lib/Target/NVPTX/NVPTXNumRegisters.h
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@ -1,16 +0,0 @@
//===-- NVPTXNumRegisters.h - PTX Register Info ---------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef NVPTX_NUM_REGISTERS_H
#define NVPTX_NUM_REGISTERS_H
namespace llvm { const unsigned NVPTXNumRegisters = 396; }
#endif

24
llvm/lib/Target/NVPTX/NVPTXRegisterInfo.td
View File

@ -29,7 +29,9 @@ def VRFrameLocal : NVPTXReg<"%SPL">;
// Special Registers used as the stack
def VRDepot : NVPTXReg<"%Depot">;
foreach i = 0-395 in {
// We use virtual registers, but define a few physical registers here to keep
// SDAG and the MachineInstr layers happy.
foreach i = 0-4 in {
def P#i : NVPTXReg<"%p"#i>; // Predicate
def RS#i : NVPTXReg<"%rs"#i>; // 16-bit
def R#i : NVPTXReg<"%r"#i>; // 32-bit
@ -47,16 +49,16 @@ foreach i = 0-395 in {
//===----------------------------------------------------------------------===//
// Register classes
//===----------------------------------------------------------------------===//
def Int1Regs : NVPTXRegClass<[i1], 8, (add (sequence "P%u", 0, 395))>;
def Int16Regs : NVPTXRegClass<[i16], 16, (add (sequence "RS%u", 0, 395))>;
def Int32Regs : NVPTXRegClass<[i32], 32, (add (sequence "R%u", 0, 395))>;
def Int64Regs : NVPTXRegClass<[i64], 64, (add (sequence "RL%u", 0, 395))>;
def Float32Regs : NVPTXRegClass<[f32], 32, (add (sequence "F%u", 0, 395))>;
def Float64Regs : NVPTXRegClass<[f64], 64, (add (sequence "FL%u", 0, 395))>;
def Int32ArgRegs : NVPTXRegClass<[i32], 32, (add (sequence "ia%u", 0, 395))>;
def Int64ArgRegs : NVPTXRegClass<[i64], 64, (add (sequence "la%u", 0, 395))>;
def Float32ArgRegs : NVPTXRegClass<[f32], 32, (add (sequence "fa%u", 0, 395))>;
def Float64ArgRegs : NVPTXRegClass<[f64], 64, (add (sequence "da%u", 0, 395))>;
def Int1Regs : NVPTXRegClass<[i1], 8, (add (sequence "P%u", 0, 4))>;
def Int16Regs : NVPTXRegClass<[i16], 16, (add (sequence "RS%u", 0, 4))>;
def Int32Regs : NVPTXRegClass<[i32], 32, (add (sequence "R%u", 0, 4))>;
def Int64Regs : NVPTXRegClass<[i64], 64, (add (sequence "RL%u", 0, 4))>;
def Float32Regs : NVPTXRegClass<[f32], 32, (add (sequence "F%u", 0, 4))>;
def Float64Regs : NVPTXRegClass<[f64], 64, (add (sequence "FL%u", 0, 4))>;
def Int32ArgRegs : NVPTXRegClass<[i32], 32, (add (sequence "ia%u", 0, 4))>;
def Int64ArgRegs : NVPTXRegClass<[i64], 64, (add (sequence "la%u", 0, 4))>;
def Float32ArgRegs : NVPTXRegClass<[f32], 32, (add (sequence "fa%u", 0, 4))>;
def Float64ArgRegs : NVPTXRegClass<[f64], 64, (add (sequence "da%u", 0, 4))>;
// Read NVPTXRegisterInfo.cpp to see how VRFrame and VRDepot are used.
def SpecialRegs : NVPTXRegClass<[i32], 32, (add VRFrame, VRDepot)>;