Reduce usage of MRegisterInfo::getRegClass

[oota-llvm.git] / lib / CodeGen / MachineInstrAnnot.cpp

diff --git a/lib/CodeGen/MachineInstrAnnot.cpp b/lib/CodeGen/MachineInstrAnnot.cpp
index 960c49283e59aea64b6221f3d9d30cf93f2b751a..9dd684c1cc06f087491bc4bd0bcfb8d42b88b26b 100644 (file)
--- a/lib/CodeGen/MachineInstrAnnot.cpp
+++ b/lib/CodeGen/MachineInstrAnnot.cpp
@@ -1,32 +1,72 @@
 //===-- MachineInstrAnnot.cpp ---------------------------------------------===//
 // 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+// 
 //  This file defines Annotations used to pass information between code
 //  generation phases.
 // 
 //===----------------------------------------------------------------------===//
 
-#include "llvm/CodeGen/MachineInstrAnnot.h"
-#include "llvm/Annotation.h"
-#include "llvm/iOther.h"
-
-AnnotationID CallArgsDescriptor::AID(AnnotationManager::
-                                     getID("CodeGen::CallArgsDescriptor"));
+#include "../Target/SparcV9/MachineInstrAnnot.h"
+#include "../Target/SparcV9/SparcV9TmpInstr.h"
+#include "llvm/CodeGen/MachineCodeForInstruction.h"
+#include "llvm/Instructions.h"
+#include "llvm/Type.h"
+using namespace llvm;
 
-CallArgsDescriptor::CallArgsDescriptor(const CallInst* _callInstr,
+CallArgsDescriptor::CallArgsDescriptor(CallInst* _callInstr,
                                        TmpInstruction* _retAddrReg,
                                        bool _isVarArgs, bool _noPrototype)
-  : Annotation(AID),
-    callInstr(_callInstr),
+  : callInstr(_callInstr),
     funcPtr(isa<Function>(_callInstr->getCalledValue())
             ? NULL : _callInstr->getCalledValue()),
     retAddrReg(_retAddrReg),
     isVarArgs(_isVarArgs),
-    noPrototype(_noPrototype)
-{
+    noPrototype(_noPrototype) {
   unsigned int numArgs = callInstr->getNumOperands();
   argInfoVec.reserve(numArgs);
   assert(callInstr->getOperand(0) == callInstr->getCalledValue()
          && "Operand 0 is ignored in the loop below!");
   for (unsigned int i=1; i < numArgs; ++i)
     argInfoVec.push_back(CallArgInfo(callInstr->getOperand(i)));
+
+  // Enter this object in the MachineCodeForInstr object of the CallInst.
+  // This transfers ownership of this object.
+  MachineCodeForInstruction::get(callInstr).setCallArgsDescriptor(this); 
+}
+
+CallInst *CallArgsDescriptor::getReturnValue() const {
+  return (callInstr->getType() == Type::VoidTy? NULL : callInstr);
+}
+
+// Mechanism to get the descriptor for a CALL MachineInstr.
+// We get the LLVM CallInstr from the ret. addr. register argument
+// 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>(isa<Function>(MI->getOperand(0).getVRegValue())
+                         ? MI->getImplicitRef(MI->getNumImplicitRefs()-1)
+                         : MI->getOperand(2).getVRegValue());
+
+  assert(retAddrReg->getNumOperands() == 1 &&
+         isa<CallInst>(retAddrReg->getOperand(0)) &&
+         "Location of callInstr arg for CALL instr. changed? FIX THIS CODE!");
+
+  const CallInst* callInstr = cast<CallInst>(retAddrReg->getOperand(0));
+
+  CallArgsDescriptor* desc =
+    MachineCodeForInstruction::get(callInstr).getCallArgsDescriptor(); 
+  assert(desc->getCallInst()==callInstr && "Incorrect call args descriptor?");
+  return desc;
 }