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-rw-r--r--lib/Target/Mips/MipsCodeEmitter.cpp136
1 files changed, 82 insertions, 54 deletions
diff --git a/lib/Target/Mips/MipsCodeEmitter.cpp b/lib/Target/Mips/MipsCodeEmitter.cpp
index 52fa95b..df877b6 100644
--- a/lib/Target/Mips/MipsCodeEmitter.cpp
+++ b/lib/Target/Mips/MipsCodeEmitter.cpp
@@ -25,6 +25,7 @@
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/Passes.h"
@@ -62,67 +63,73 @@ class MipsCodeEmitter : public MachineFunctionPass {
static char ID;
- public:
- MipsCodeEmitter(TargetMachine &tm, JITCodeEmitter &mce) :
- MachineFunctionPass(ID), JTI(0),
- II((const MipsInstrInfo *) tm.getInstrInfo()),
- TD(tm.getDataLayout()), TM(tm), MCE(mce), MCPEs(0), MJTEs(0),
- IsPIC(TM.getRelocationModel() == Reloc::PIC_) {
- }
+public:
+ MipsCodeEmitter(TargetMachine &tm, JITCodeEmitter &mce)
+ : MachineFunctionPass(ID), JTI(0),
+ II((const MipsInstrInfo *) tm.getInstrInfo()), TD(tm.getDataLayout()),
+ TM(tm), MCE(mce), MCPEs(0), MJTEs(0),
+ IsPIC(TM.getRelocationModel() == Reloc::PIC_) {}
- bool runOnMachineFunction(MachineFunction &MF);
+ bool runOnMachineFunction(MachineFunction &MF);
- virtual const char *getPassName() const {
- return "Mips Machine Code Emitter";
- }
+ virtual const char *getPassName() const {
+ return "Mips Machine Code Emitter";
+ }
- /// getBinaryCodeForInstr - This function, generated by the
- /// CodeEmitterGenerator using TableGen, produces the binary encoding for
- /// machine instructions.
- uint64_t getBinaryCodeForInstr(const MachineInstr &MI) const;
+ /// getBinaryCodeForInstr - This function, generated by the
+ /// CodeEmitterGenerator using TableGen, produces the binary encoding for
+ /// machine instructions.
+ uint64_t getBinaryCodeForInstr(const MachineInstr &MI) const;
- void emitInstruction(const MachineInstr &MI);
+ void emitInstruction(MachineBasicBlock::instr_iterator MI,
+ MachineBasicBlock &MBB);
- private:
+private:
- void emitWord(unsigned Word);
+ void emitWord(unsigned Word);
- /// Routines that handle operands which add machine relocations which are
- /// fixed up by the relocation stage.
- void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
- bool MayNeedFarStub) const;
- void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
- void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
- void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
- void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc) const;
+ /// Routines that handle operands which add machine relocations which are
+ /// fixed up by the relocation stage.
+ void emitGlobalAddress(const GlobalValue *GV, unsigned Reloc,
+ bool MayNeedFarStub) const;
+ void emitExternalSymbolAddress(const char *ES, unsigned Reloc) const;
+ void emitConstPoolAddress(unsigned CPI, unsigned Reloc) const;
+ void emitJumpTableAddress(unsigned JTIndex, unsigned Reloc) const;
+ void emitMachineBasicBlock(MachineBasicBlock *BB, unsigned Reloc) const;
- /// getMachineOpValue - Return binary encoding of operand. If the machine
- /// operand requires relocation, record the relocation and return zero.
- unsigned getMachineOpValue(const MachineInstr &MI,
- const MachineOperand &MO) const;
+ /// getMachineOpValue - Return binary encoding of operand. If the machine
+ /// operand requires relocation, record the relocation and return zero.
+ unsigned getMachineOpValue(const MachineInstr &MI,
+ const MachineOperand &MO) const;
- unsigned getRelocation(const MachineInstr &MI,
- const MachineOperand &MO) const;
+ unsigned getRelocation(const MachineInstr &MI,
+ const MachineOperand &MO) const;
- unsigned getJumpTargetOpValue(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getJumpTargetOpValue(const MachineInstr &MI, unsigned OpNo) const;
- unsigned getBranchTargetOpValue(const MachineInstr &MI,
- unsigned OpNo) const;
- unsigned getMemEncoding(const MachineInstr &MI, unsigned OpNo) const;
- unsigned getSizeExtEncoding(const MachineInstr &MI, unsigned OpNo) const;
- unsigned getSizeInsEncoding(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getBranchTargetOpValue(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getMemEncoding(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getSizeExtEncoding(const MachineInstr &MI, unsigned OpNo) const;
+ unsigned getSizeInsEncoding(const MachineInstr &MI, unsigned OpNo) const;
- void emitGlobalAddressUnaligned(const GlobalValue *GV, unsigned Reloc,
- int Offset) const;
- };
+ void emitGlobalAddressUnaligned(const GlobalValue *GV, unsigned Reloc,
+ int Offset) const;
+
+ /// \brief Expand pseudo instruction. Return true if MI was expanded.
+ bool expandPseudos(MachineBasicBlock::instr_iterator &MI,
+ MachineBasicBlock &MBB) const;
+};
}
char MipsCodeEmitter::ID = 0;
bool MipsCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
- JTI = ((MipsTargetMachine&) MF.getTarget()).getJITInfo();
- II = ((const MipsTargetMachine&) MF.getTarget()).getInstrInfo();
- TD = ((const MipsTargetMachine&) MF.getTarget()).getDataLayout();
+ MipsTargetMachine &Target = static_cast<MipsTargetMachine &>(
+ const_cast<TargetMachine &>(MF.getTarget()));
+
+ JTI = Target.getJITInfo();
+ II = Target.getInstrInfo();
+ TD = Target.getDataLayout();
Subtarget = &TM.getSubtarget<MipsSubtarget> ();
MCPEs = &MF.getConstantPool()->getConstants();
MJTEs = 0;
@@ -139,8 +146,8 @@ bool MipsCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
MBB != E; ++MBB){
MCE.StartMachineBasicBlock(MBB);
for (MachineBasicBlock::instr_iterator I = MBB->instr_begin(),
- E = MBB->instr_end(); I != E; ++I)
- emitInstruction(*I);
+ E = MBB->instr_end(); I != E;)
+ emitInstruction(*I++, *MBB);
}
} while (MCE.finishFunction(MF));
@@ -265,19 +272,21 @@ void MipsCodeEmitter::emitMachineBasicBlock(MachineBasicBlock *BB,
Reloc, BB));
}
-void MipsCodeEmitter::emitInstruction(const MachineInstr &MI) {
- DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << MI);
-
- MCE.processDebugLoc(MI.getDebugLoc(), true);
+void MipsCodeEmitter::emitInstruction(MachineBasicBlock::instr_iterator MI,
+ MachineBasicBlock &MBB) {
+ DEBUG(errs() << "JIT: " << (void*)MCE.getCurrentPCValue() << ":\t" << *MI);
- // Skip pseudo instructions.
- if ((MI.getDesc().TSFlags & MipsII::FormMask) == MipsII::Pseudo)
+ // Expand pseudo instruction. Skip if MI was not expanded.
+ if (((MI->getDesc().TSFlags & MipsII::FormMask) == MipsII::Pseudo) &&
+ !expandPseudos(MI, MBB))
return;
- emitWord(getBinaryCodeForInstr(MI));
+ MCE.processDebugLoc(MI->getDebugLoc(), true);
+
+ emitWord(getBinaryCodeForInstr(*MI));
++NumEmitted; // Keep track of the # of mi's emitted
- MCE.processDebugLoc(MI.getDebugLoc(), false);
+ MCE.processDebugLoc(MI->getDebugLoc(), false);
}
void MipsCodeEmitter::emitWord(unsigned Word) {
@@ -289,6 +298,25 @@ void MipsCodeEmitter::emitWord(unsigned Word) {
MCE.emitWordBE(Word);
}
+bool MipsCodeEmitter::expandPseudos(MachineBasicBlock::instr_iterator &MI,
+ MachineBasicBlock &MBB) const {
+ switch (MI->getOpcode()) {
+ case Mips::NOP:
+ BuildMI(MBB, &*MI, MI->getDebugLoc(), II->get(Mips::SLL), Mips::ZERO)
+ .addReg(Mips::ZERO).addImm(0);
+ break;
+ case Mips::JALRPseudo:
+ BuildMI(MBB, &*MI, MI->getDebugLoc(), II->get(Mips::JALR), Mips::RA)
+ .addReg(MI->getOperand(0).getReg());
+ break;
+ default:
+ return false;
+ }
+
+ (MI--)->eraseFromBundle();
+ return true;
+}
+
/// createMipsJITCodeEmitterPass - Return a pass that emits the collected Mips
/// code to the specified MCE object.
FunctionPass *llvm::createMipsJITCodeEmitterPass(MipsTargetMachine &TM,
generated by cgit v1.1 at 2025-05-13 15:17:18 +0000