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R600: Emit used GPRs count

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179684 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vincent Lejeune 2013-04-17 15:17:25 +00:00
parent 784baa6f44
commit 141ca7fc64
2 changed files with 41 additions and 8 deletions
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46
lib/Target/R600/AMDGPUAsmPrinter.cpp
View File

@ -22,6 +22,7 @@
#include "SIDefines.h"
#include "SIMachineFunctionInfo.h"
#include "SIRegisterInfo.h"
#include "R600RegisterInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCStreamer.h"
@ -54,20 +55,51 @@ bool AMDGPUAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
if (OutStreamer.hasRawTextSupport()) {
OutStreamer.EmitRawText("@" + MF.getName() + ":");
}
const MCSectionELF *ConfigSection = getObjFileLowering().getContext()
.getELFSection(".AMDGPU.config",
ELF::SHT_NULL, 0,
SectionKind::getReadOnly());
OutStreamer.SwitchSection(ConfigSection);
if (STM.device()->getGeneration() > AMDGPUDeviceInfo::HD6XXX) {
const MCSectionELF *ConfigSection = getObjFileLowering().getContext()
.getELFSection(".AMDGPU.config",
ELF::SHT_NULL, 0,
SectionKind::getReadOnly());
OutStreamer.SwitchSection(ConfigSection);
EmitProgramInfo(MF);
EmitProgramInfoSI(MF);
} else {
EmitProgramInfoR600(MF);
}
OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
EmitFunctionBody();
return false;
}
void AMDGPUAsmPrinter::EmitProgramInfo(MachineFunction &MF) {
void AMDGPUAsmPrinter::EmitProgramInfoR600(MachineFunction &MF) {
unsigned MaxGPR = 0;
const R600RegisterInfo * RI =
static_cast<const R600RegisterInfo*>(TM.getRegisterInfo());
for (MachineFunction::iterator BB = MF.begin(), BB_E = MF.end();
BB != BB_E; ++BB) {
MachineBasicBlock &MBB = *BB;
for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end();
I != E; ++I) {
MachineInstr &MI = *I;
unsigned numOperands = MI.getNumOperands();
for (unsigned op_idx = 0; op_idx < numOperands; op_idx++) {
MachineOperand & MO = MI.getOperand(op_idx);
if (!MO.isReg())
continue;
unsigned HWReg = RI->getEncodingValue(MO.getReg()) & 0xff;
// Register with value > 127 aren't GPR
if (HWReg > 127)
continue;
MaxGPR = std::max(MaxGPR, HWReg);
}
}
}
OutStreamer.EmitIntValue(MaxGPR + 1, 4);
}
void AMDGPUAsmPrinter::EmitProgramInfoSI(MachineFunction &MF) {
unsigned MaxSGPR = 0;
unsigned MaxVGPR = 0;
bool VCCUsed = false;

3
lib/Target/R600/AMDGPUAsmPrinter.h
View File

@ -33,7 +33,8 @@ public:
/// \brief Emit register usage information so that the GPU driver
/// can correctly setup the GPU state.
void EmitProgramInfo(MachineFunction &MF);
void EmitProgramInfoR600(MachineFunction &MF);
void EmitProgramInfoSI(MachineFunction &MF);
/// Implemented in AMDGPUMCInstLower.cpp
virtual void EmitInstruction(const MachineInstr *MI);