More constification of things. More comments added. No functionality

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

diff --git a/lib/CodeGen/SelectionDAG/CallingConvLower.cpp b/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
index b8bc484e3bcd1537baecdec72ac15910d986abf8..591e9aa0eecb30261cc52d5d2b492925d163bfd1 100644 (file)
--- a/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
+++ b/lib/CodeGen/SelectionDAG/CallingConvLower.cpp
@@ -14,27 +14,36 @@
 
 #include "llvm/CodeGen/CallingConvLower.h"
 #include "llvm/CodeGen/SelectionDAGNodes.h"
-#include "llvm/Target/MRegisterInfo.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Target/TargetData.h"
 #include "llvm/Target/TargetMachine.h"
 using namespace llvm;
 
 CCState::CCState(unsigned CC, bool isVarArg, const TargetMachine &tm,
                  SmallVector<CCValAssign, 16> &locs)
   : CallingConv(CC), IsVarArg(isVarArg), TM(tm),
-    MRI(*TM.getRegisterInfo()), Locs(locs) {
+    TRI(*TM.getRegisterInfo()), Locs(locs) {
   // No stack is used.
   StackOffset = 0;
   
-  UsedRegs.resize(MRI.getNumRegs());
+  UsedRegs.resize(TRI.getNumRegs());
 }
 
-void CCState::HandleStruct(unsigned ValNo, MVT::ValueType ValVT,
-                           MVT::ValueType LocVT, CCValAssign::LocInfo LocInfo,
-                           unsigned ArgFlags) {
+// 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));
@@ -44,7 +53,7 @@ void CCState::HandleStruct(unsigned ValNo, MVT::ValueType ValVT,
 void CCState::MarkAllocated(unsigned Reg) {
   UsedRegs[Reg/32] |= 1 << (Reg&31);
   
-  if (const unsigned *RegAliases = MRI.getAliasSet(Reg))
+  if (const unsigned *RegAliases = TRI.getAliasSet(Reg))
     for (; (Reg = *RegAliases); ++RegAliases)
       UsedRegs[Reg/32] |= 1 << (Reg&31);
 }