Factor the addressing mode and the load/store VT out of LoadSDNode

[oota-llvm.git] / lib / CodeGen / SelectionDAG / CallingConvLower.cpp

diff --git a/lib/CodeGen/SelectionDAG/CallingConvLower.cpp b/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
index 47d08376bb172a91112058002d35c6d321d0a774..337c7fda9ab2509a8cff7112d12202789e383e33 100644 (file)
--- a/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
+++ b/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Chris Lattner and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -13,16 +13,41 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/CodeGen/CallingConvLower.h"
+#include "llvm/CodeGen/SelectionDAGNodes.h"
 #include "llvm/Target/MRegisterInfo.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetMachine.h"
 using namespace llvm;
 
-CCState::CCState(const MRegisterInfo &mri) : MRI(mri) {
+CCState::CCState(unsigned CC, bool isVarArg, const TargetMachine &tm,
+                 SmallVector<CCValAssign, 16> &locs)
+  : CallingConv(CC), IsVarArg(isVarArg), TM(tm),
+    MRI(*TM.getRegisterInfo()), Locs(locs) {
   // No stack is used.
   StackOffset = 0;
   
   UsedRegs.resize(MRI.getNumRegs());
 }
 
+// HandleByVal - Allocate a stack slot large enough to pass an argument by
+// value. The size and alignment information of the argument is encoded in its
+// parameter attribute.
+void CCState::HandleByVal(unsigned ValNo, MVT::ValueType ValVT,
+                          MVT::ValueType LocVT, CCValAssign::LocInfo LocInfo,
+                          int MinSize, int MinAlign,
+                          unsigned ArgFlags) {
+  unsigned Align  = 1 << ((ArgFlags & ISD::ParamFlags::ByValAlign) >>
+                          ISD::ParamFlags::ByValAlignOffs);
+  unsigned Size   = (ArgFlags & ISD::ParamFlags::ByValSize) >>
+      ISD::ParamFlags::ByValSizeOffs;
+  if (MinSize > (int)Size)
+    Size = MinSize;
+  if (MinAlign > (int)Align)
+    Align = MinAlign;
+  unsigned Offset = AllocateStack(Size, Align);
+
+  addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
+}
 
 /// MarkAllocated - Mark a register and all of its aliases as allocated.
 void CCState::MarkAllocated(unsigned Reg) {
@@ -32,3 +57,65 @@ void CCState::MarkAllocated(unsigned Reg) {
     for (; (Reg = *RegAliases); ++RegAliases)
       UsedRegs[Reg/32] |= 1 << (Reg&31);
 }
+
+/// AnalyzeFormalArguments - Analyze an ISD::FORMAL_ARGUMENTS node,
+/// incorporating info about the formals into this state.
+void CCState::AnalyzeFormalArguments(SDNode *TheArgs, CCAssignFn Fn) {
+  unsigned NumArgs = TheArgs->getNumValues()-1;
+  
+  for (unsigned i = 0; i != NumArgs; ++i) {
+    MVT::ValueType ArgVT = TheArgs->getValueType(i);
+    SDOperand FlagOp = TheArgs->getOperand(3+i);
+    unsigned ArgFlags = cast<ConstantSDNode>(FlagOp)->getValue();
+    if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
+      cerr << "Formal argument #" << i << " has unhandled type "
+           << MVT::getValueTypeString(ArgVT) << "\n";
+      abort();
+    }
+  }
+}
+
+/// AnalyzeReturn - Analyze the returned values of an ISD::RET node,
+/// incorporating info about the result values into this state.
+void CCState::AnalyzeReturn(SDNode *TheRet, CCAssignFn Fn) {
+  // Determine which register each value should be copied into.
+  for (unsigned i = 0, e = TheRet->getNumOperands() / 2; i != e; ++i) {
+    MVT::ValueType VT = TheRet->getOperand(i*2+1).getValueType();
+    if (Fn(i, VT, VT, CCValAssign::Full,
+           cast<ConstantSDNode>(TheRet->getOperand(i*2+2))->getValue(), *this)){
+      cerr << "Return operand #" << i << " has unhandled type "
+           << MVT::getValueTypeString(VT) << "\n";
+      abort();
+    }
+  }
+}
+
+
+/// AnalyzeCallOperands - Analyze an ISD::CALL node, incorporating info
+/// about the passed values into this state.
+void CCState::AnalyzeCallOperands(SDNode *TheCall, CCAssignFn Fn) {
+  unsigned NumOps = (TheCall->getNumOperands() - 5) / 2;
+  for (unsigned i = 0; i != NumOps; ++i) {
+    MVT::ValueType ArgVT = TheCall->getOperand(5+2*i).getValueType();
+    SDOperand FlagOp = TheCall->getOperand(5+2*i+1);
+    unsigned ArgFlags =cast<ConstantSDNode>(FlagOp)->getValue();
+    if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
+      cerr << "Call operand #" << i << " has unhandled type "
+           << MVT::getValueTypeString(ArgVT) << "\n";
+      abort();
+    }
+  }
+}
+
+/// AnalyzeCallResult - Analyze the return values of an ISD::CALL node,
+/// incorporating info about the passed values into this state.
+void CCState::AnalyzeCallResult(SDNode *TheCall, CCAssignFn Fn) {
+  for (unsigned i = 0, e = TheCall->getNumValues() - 1; i != e; ++i) {
+    MVT::ValueType VT = TheCall->getValueType(i);
+    if (Fn(i, VT, VT, CCValAssign::Full, 0, *this)) {
+      cerr << "Call result #" << i << " has unhandled type "
+           << MVT::getValueTypeString(VT) << "\n";
+      abort();
+    }
+  }
+}