// Mechanism to get the descriptor for a CALL MachineInstr.
// We get the LLVM CallInstr from the ret. addr. register argument
-// of the CALL MachineInstr, then get the CallArgsDescriptor from the
-// MachineCodeForInstruction object for the CallInstr.
+// of the CALL MachineInstr (which is explicit operand #3 for indirect
+// calls or the last implicit operand for direct calls). We then get
+// the CallArgsDescriptor from the MachineCodeForInstruction object for
+// the CallInstr.
// This is roundabout but avoids adding a new map or annotation just
// to keep track of CallArgsDescriptors.
//
CallArgsDescriptor *CallArgsDescriptor::get(const MachineInstr* MI)
{
const TmpInstruction* retAddrReg =
- cast<TmpInstruction>(MI->getImplicitRef(MI->getNumImplicitRefs()-1));
+ cast<TmpInstruction>(isa<Function>(MI->getOperand(0).getVRegValue())
+ ? MI->getImplicitRef(MI->getNumImplicitRefs()-1)
+ : MI->getOperand(2).getVRegValue());
+
assert(retAddrReg->getNumOperands() == 1 &&
isa<CallInst>(retAddrReg->getOperand(0)) &&
- "Order of implicit args of CALL instr. changed. FIX THIS CODE!");
+ "Location of callInstr arg for CALL instr. changed? FIX THIS CODE!");
+
const CallInst* callInstr = cast<CallInst>(retAddrReg->getOperand(0));
CallArgsDescriptor* desc =