Can't fold the bit_convert is the store is a truncating store.

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

diff --git a/lib/CodeGen/SelectionDAG/CallingConvLower.cpp b/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
index 47d08376bb172a91112058002d35c6d321d0a774..08a6ade62480cbd2746b077fa38c5c600d7eb675 100644 (file)
--- a/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
+++ b/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
@@ -13,10 +13,14 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/CodeGen/CallingConvLower.h"
+#include "llvm/CodeGen/SelectionDAGNodes.h"
 #include "llvm/Target/MRegisterInfo.h"
+#include "llvm/Target/TargetMachine.h"
 using namespace llvm;
 
-CCState::CCState(const MRegisterInfo &mri) : MRI(mri) {
+CCState::CCState(unsigned CC, const TargetMachine &tm,
+                 SmallVector<CCValAssign, 16> &locs)
+  : CallingConv(CC), TM(tm), MRI(*TM.getRegisterInfo()), Locs(locs) {
   // No stack is used.
   StackOffset = 0;
   
@@ -32,3 +36,66 @@ 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();
+    }
+  }
+}
+