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authorVincent Lejeune <vljn@ovi.com>2013-04-17 15:17:25 +0000
committerVincent Lejeune <vljn@ovi.com>2013-04-17 15:17:25 +0000
commit141ca7fc6488bfb20ad59854cc12039e16688ed3 (patch)
tree6e38ef655da5a133b0e8f5dccb4b6243d9ff55c2 /lib
parent784baa6f4440beac54881673ecc7baa88f8b94dd (diff)
R600: Emit used GPRs count
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179684 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
-rw-r--r--lib/Target/R600/AMDGPUAsmPrinter.cpp46
-rw-r--r--lib/Target/R600/AMDGPUAsmPrinter.h3
2 files changed, 41 insertions, 8 deletions
diff --git a/lib/Target/R600/AMDGPUAsmPrinter.cpp b/lib/Target/R600/AMDGPUAsmPrinter.cpp
index 615ba6f0fd7..d8a380de839 100644
--- a/lib/Target/R600/AMDGPUAsmPrinter.cpp
+++ b/lib/Target/R600/AMDGPUAsmPrinter.cpp
@@ -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;
diff --git a/lib/Target/R600/AMDGPUAsmPrinter.h b/lib/Target/R600/AMDGPUAsmPrinter.h
index 3812282b179..f425ef41946 100644
--- a/lib/Target/R600/AMDGPUAsmPrinter.h
+++ b/lib/Target/R600/AMDGPUAsmPrinter.h
@@ -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);