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Simplify Call translation slightly.

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llvm-svn: 3963
This commit is contained in:
Vikram S. Adve 2002-09-28 16:55:41 +00:00
parent d3a8e54af0
commit 33b21ec523
1 changed files with 13 additions and 25 deletions
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38
lib/Target/Sparc/SparcInstrSelection.cpp
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@ -1965,11 +1965,11 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
}
case 61: // reg: Call
{ // Generate a direct (CALL) or indirect (JMPL). depending
// Mark the return-address register and the indirection
// register (if any) as hidden virtual registers.
// Also, mark the operands of the Call and return value (if
// any) as implicit operands of the CALL machine instruction.
{ // Generate a direct (CALL) or indirect (JMPL) call.
// Mark the return-address register, the indirection
// register (for indirect calls), the operands of the Call,
// and the return value (if any) as implicit operands
// of the machine instruction.
//
// If this is a varargs function, floating point arguments
// have to passed in integer registers so insert
@ -1977,34 +1977,22 @@ GetInstructionsByRule(InstructionNode* subtreeRoot,
//
CallInst *callInstr = cast<CallInst>(subtreeRoot->getInstruction());
Value *callee = callInstr->getCalledValue();
// Create hidden virtual register for return address, with type void*.
// Create hidden virtual register for return address with type void*
TmpInstruction* retAddrReg =
new TmpInstruction(PointerType::get(Type::VoidTy), callInstr);
MachineCodeForInstruction::get(callInstr).addTemp(retAddrReg);
// Generate the machine instruction and its operands.
// Use CALL for direct function calls; this optimistically assumes
// the PC-relative address fits in the CALL address field (22 bits).
// Use JMPL for indirect calls.
//
if (isa<Function>(callee))
{ // direct function call
M = new MachineInstr(CALL);
M->SetMachineOperandVal(0, MachineOperand::MO_PCRelativeDisp,
callee);
}
else
{ // indirect function call
M = new MachineInstr(JMPLCALL);
M->SetMachineOperandVal(0, MachineOperand::MO_VirtualRegister,
callee);
M->SetMachineOperandConst(1, MachineOperand::MO_SignExtendedImmed,
(int64_t) 0);
M->SetMachineOperandVal(2, MachineOperand::MO_VirtualRegister,
retAddrReg);
}
if (isa<Function>(callee)) // direct function call
M = Create1OperandInstr_Addr(CALL, callee);
else // indirect function call
M = Create3OperandInstr_SImmed(JMPLCALL, callee,
(int64_t) 0, retAddrReg);
mvec.push_back(M);
const FunctionType* funcType =