-//===---- HexagonSplitTFRCondSets.cpp - split TFR condsets into xfers -----===//
+//===-- HexagonSplitTFRCondSets.cpp - split TFR condsets into xfers -------===//
//
// The LLVM Compiler Infrastructure
//
// License. See LICENSE.TXT for details.
//
//
-//===----------------------------------------------------------------------===////
+//===----------------------------------------------------------------------===//
// This pass tries to provide opportunities for better optimization of muxes.
// The default code generated for something like: flag = (a == b) ? 1 : 3;
// would be:
// {p0 = cmp.eq(r0,r1)}
// {r3 = mux(p0,#1,#3)}
//
-// This requires two packets. If we use .new predicated immediate transfers,
+// This requires two packets. If we use .new predicated immediate transfers,
// then we can do this in a single packet, e.g.:
//
// {p0 = cmp.eq(r0,r1)
//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "xfer"
-#include "HexagonTargetMachine.h"
-#include "HexagonSubtarget.h"
+#include "Hexagon.h"
#include "HexagonMachineFunctionInfo.h"
-#include "llvm/CodeGen/Passes.h"
+#include "HexagonSubtarget.h"
+#include "HexagonTargetMachine.h"
#include "llvm/CodeGen/LatencyPriorityQueue.h"
#include "llvm/CodeGen/MachineDominators.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/ScheduleHazardRecognizer.h"
#include "llvm/CodeGen/SchedulerRegistry.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
+#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetRegisterInfo.h"
using namespace llvm;
+#define DEBUG_TYPE "xfer"
+
+namespace llvm {
+ void initializeHexagonSplitTFRCondSetsPass(PassRegistry&);
+}
+
+
namespace {
class HexagonSplitTFRCondSets : public MachineFunctionPass {
- HexagonTargetMachine& QTM;
+ const HexagonTargetMachine &QTM;
const HexagonSubtarget &QST;
public:
static char ID;
- HexagonSplitTFRCondSets(HexagonTargetMachine& TM) :
- MachineFunctionPass(ID), QTM(TM), QST(*TM.getSubtargetImpl()) {}
+ HexagonSplitTFRCondSets(const HexagonTargetMachine& TM) :
+ MachineFunctionPass(ID), QTM(TM), QST(*TM.getSubtargetImpl()) {
+ initializeHexagonSplitTFRCondSetsPass(*PassRegistry::getPassRegistry());
+ }
- const char *getPassName() const {
+ const char *getPassName() const override {
return "Hexagon Split TFRCondSets";
}
- bool runOnMachineFunction(MachineFunction &Fn);
+ bool runOnMachineFunction(MachineFunction &Fn) override;
};
bool HexagonSplitTFRCondSets::runOnMachineFunction(MachineFunction &Fn) {
- const TargetInstrInfo *TII = QTM.getInstrInfo();
+ const TargetInstrInfo *TII = QTM.getSubtargetImpl()->getInstrInfo();
// Loop over all of the basic blocks.
for (MachineFunction::iterator MBBb = Fn.begin(), MBBe = Fn.end();
for (MachineBasicBlock::iterator MII = MBB->begin(); MII != MBB->end();
++MII) {
MachineInstr *MI = MII;
- int Opc = MI->getOpcode();
- if (Opc == Hexagon::TFR_condset_rr) {
-
- int DestReg = MI->getOperand(0).getReg();
- int SrcReg1 = MI->getOperand(2).getReg();
- int SrcReg2 = MI->getOperand(3).getReg();
-
- // Minor optimization: do not emit the predicated copy if the source and
- // the destination is the same register
- if (DestReg != SrcReg1) {
- BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::TFR_cPt),
- DestReg).addReg(MI->getOperand(1).getReg()).addReg(SrcReg1);
+ switch(MI->getOpcode()) {
+ case Hexagon::TFR_condset_ri: {
+ int DestReg = MI->getOperand(0).getReg();
+ int SrcReg1 = MI->getOperand(2).getReg();
+
+ // Do not emit the predicated copy if the source and the destination
+ // is the same register.
+ if (DestReg != SrcReg1) {
+ BuildMI(*MBB, MII, MI->getDebugLoc(),
+ TII->get(Hexagon::A2_tfrt), DestReg).
+ addReg(MI->getOperand(1).getReg()).addReg(SrcReg1);
+ }
+ BuildMI(*MBB, MII, MI->getDebugLoc(),
+ TII->get(Hexagon::C2_cmoveif), DestReg).
+ addReg(MI->getOperand(1).getReg()).
+ addImm(MI->getOperand(3).getImm());
+
+ MII = MBB->erase(MI);
+ --MII;
+ break;
}
- if (DestReg != SrcReg2) {
- BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::TFR_cNotPt),
- DestReg).addReg(MI->getOperand(1).getReg()).addReg(SrcReg2);
+ case Hexagon::TFR_condset_ir: {
+ int DestReg = MI->getOperand(0).getReg();
+ int SrcReg2 = MI->getOperand(3).getReg();
+
+ BuildMI(*MBB, MII, MI->getDebugLoc(),
+ TII->get(Hexagon::C2_cmoveit), DestReg).
+ addReg(MI->getOperand(1).getReg()).
+ addImm(MI->getOperand(2).getImm());
+
+ // Do not emit the predicated copy if the source and
+ // the destination is the same register.
+ if (DestReg != SrcReg2) {
+ BuildMI(*MBB, MII, MI->getDebugLoc(),
+ TII->get(Hexagon::A2_tfrf), DestReg).
+ addReg(MI->getOperand(1).getReg()).addReg(SrcReg2);
+ }
+ MII = MBB->erase(MI);
+ --MII;
+ break;
+ }
+ case Hexagon::TFR_condset_ii: {
+ int DestReg = MI->getOperand(0).getReg();
+ int SrcReg1 = MI->getOperand(1).getReg();
+
+ int Immed1 = MI->getOperand(2).getImm();
+ int Immed2 = MI->getOperand(3).getImm();
+ BuildMI(*MBB, MII, MI->getDebugLoc(),
+ TII->get(Hexagon::C2_cmoveit),
+ DestReg).addReg(SrcReg1).addImm(Immed1);
+ BuildMI(*MBB, MII, MI->getDebugLoc(),
+ TII->get(Hexagon::C2_cmoveif),
+ DestReg).addReg(SrcReg1).addImm(Immed2);
+ MII = MBB->erase(MI);
+ --MII;
+ break;
}
- MII = MBB->erase(MI);
- --MII;
- } else if (Opc == Hexagon::TFR_condset_ii) {
- int DestReg = MI->getOperand(0).getReg();
- int SrcReg1 = MI->getOperand(1).getReg();
- int Immed1 = MI->getOperand(2).getImm();
- int Immed2 = MI->getOperand(3).getImm();
- BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::TFRI_cPt),
- DestReg).addReg(SrcReg1).addImm(Immed1);
- BuildMI(*MBB, MII, MI->getDebugLoc(), TII->get(Hexagon::TFRI_cNotPt),
- DestReg).addReg(SrcReg1).addImm(Immed2);
- MII = MBB->erase(MI);
- --MII;
}
}
}
-
return true;
}
// Public Constructor Functions
//===----------------------------------------------------------------------===//
-FunctionPass *llvm::createHexagonSplitTFRCondSets(HexagonTargetMachine &TM) {
+static void initializePassOnce(PassRegistry &Registry) {
+ const char *Name = "Hexagon Split TFRCondSets";
+ PassInfo *PI = new PassInfo(Name, "hexagon-split-tfr",
+ &HexagonSplitTFRCondSets::ID, nullptr, false,
+ false);
+ Registry.registerPass(*PI, true);
+}
+
+void llvm::initializeHexagonSplitTFRCondSetsPass(PassRegistry &Registry) {
+ CALL_ONCE_INITIALIZATION(initializePassOnce)
+}
+
+FunctionPass*
+llvm::createHexagonSplitTFRCondSets(const HexagonTargetMachine &TM) {
return new HexagonSplitTFRCondSets(TM);
}
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