1 files changed, 180 insertions, 0 deletions
diff --git a/contrib/llvm/lib/CodeGen/CallingConvLower.cpp b/contrib/llvm/lib/CodeGen/CallingConvLower.cpp
new file mode 100644
index 000000000000..fcfc9dcbf7c3
--- /dev/null
+++ b/contrib/llvm/lib/CodeGen/CallingConvLower.cpp
@@ -0,0 +1,180 @@
+//===-- CallingConvLower.cpp - Calling Conventions ------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the CCState class, used for lowering and implementing
+// calling conventions.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/CallingConvLower.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetLowering.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+using namespace llvm;
+
+CCState::CCState(CallingConv::ID CC, bool isVarArg, MachineFunction &mf,
+                 const TargetMachine &tm, SmallVectorImpl<CCValAssign> &locs,
+                 LLVMContext &C)
+  : CallingConv(CC), IsVarArg(isVarArg), MF(mf), TM(tm),
+    TRI(*TM.getRegisterInfo()), Locs(locs), Context(C),
+    CallOrPrologue(Unknown) {
+  // No stack is used.
+  StackOffset = 0;
+
+  clearByValRegsInfo();
+  UsedRegs.resize((TRI.getNumRegs()+31)/32);
+}
+
+// HandleByVal - Allocate space on the stack 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 ValVT,
+                          MVT LocVT, CCValAssign::LocInfo LocInfo,
+                          int MinSize, int MinAlign,
+                          ISD::ArgFlagsTy ArgFlags) {
+  unsigned Align = ArgFlags.getByValAlign();
+  unsigned Size  = ArgFlags.getByValSize();
+  if (MinSize > (int)Size)
+    Size = MinSize;
+  if (MinAlign > (int)Align)
+    Align = MinAlign;
+  MF.getFrameInfo()->ensureMaxAlignment(Align);
+  TM.getTargetLowering()->HandleByVal(this, Size, Align);
+  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) {
+  for (MCRegAliasIterator AI(Reg, &TRI, true); AI.isValid(); ++AI)
+    UsedRegs[*AI/32] |= 1 << (*AI&31);
+}
+
+/// AnalyzeFormalArguments - Analyze an array of argument values,
+/// incorporating info about the formals into this state.
+void
+CCState::AnalyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Ins,
+                                CCAssignFn Fn) {
+  unsigned NumArgs = Ins.size();
+
+  for (unsigned i = 0; i != NumArgs; ++i) {
+    MVT ArgVT = Ins[i].VT;
+    ISD::ArgFlagsTy ArgFlags = Ins[i].Flags;
+    if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
+#ifndef NDEBUG
+      dbgs() << "Formal argument #" << i << " has unhandled type "
+             << EVT(ArgVT).getEVTString() << '\n';
+#endif
+      llvm_unreachable(0);
+    }
+  }
+}
+
+/// CheckReturn - Analyze the return values of a function, returning true if
+/// the return can be performed without sret-demotion, and false otherwise.
+bool CCState::CheckReturn(const SmallVectorImpl<ISD::OutputArg> &Outs,
+                          CCAssignFn Fn) {
+  // Determine which register each value should be copied into.
+  for (unsigned i = 0, e = Outs.size(); i != e; ++i) {
+    MVT VT = Outs[i].VT;
+    ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
+    if (Fn(i, VT, VT, CCValAssign::Full, ArgFlags, *this))
+      return false;
+  }
+  return true;
+}
+
+/// AnalyzeReturn - Analyze the returned values of a return,
+/// incorporating info about the result values into this state.
+void CCState::AnalyzeReturn(const SmallVectorImpl<ISD::OutputArg> &Outs,
+                            CCAssignFn Fn) {
+  // Determine which register each value should be copied into.
+  for (unsigned i = 0, e = Outs.size(); i != e; ++i) {
+    MVT VT = Outs[i].VT;
+    ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
+    if (Fn(i, VT, VT, CCValAssign::Full, ArgFlags, *this)) {
+#ifndef NDEBUG
+      dbgs() << "Return operand #" << i << " has unhandled type "
+             << EVT(VT).getEVTString() << '\n';
+#endif
+      llvm_unreachable(0);
+    }
+  }
+}
+
+/// AnalyzeCallOperands - Analyze the outgoing arguments to a call,
+/// incorporating info about the passed values into this state.
+void CCState::AnalyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs,
+                                  CCAssignFn Fn) {
+  unsigned NumOps = Outs.size();
+  for (unsigned i = 0; i != NumOps; ++i) {
+    MVT ArgVT = Outs[i].VT;
+    ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
+    if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
+#ifndef NDEBUG
+      dbgs() << "Call operand #" << i << " has unhandled type "
+             << EVT(ArgVT).getEVTString() << '\n';
+#endif
+      llvm_unreachable(0);
+    }
+  }
+}
+
+/// AnalyzeCallOperands - Same as above except it takes vectors of types
+/// and argument flags.
+void CCState::AnalyzeCallOperands(SmallVectorImpl<MVT> &ArgVTs,
+                                  SmallVectorImpl<ISD::ArgFlagsTy> &Flags,
+                                  CCAssignFn Fn) {
+  unsigned NumOps = ArgVTs.size();
+  for (unsigned i = 0; i != NumOps; ++i) {
+    MVT ArgVT = ArgVTs[i];
+    ISD::ArgFlagsTy ArgFlags = Flags[i];
+    if (Fn(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, *this)) {
+#ifndef NDEBUG
+      dbgs() << "Call operand #" << i << " has unhandled type "
+             << EVT(ArgVT).getEVTString() << '\n';
+#endif
+      llvm_unreachable(0);
+    }
+  }
+}
+
+/// AnalyzeCallResult - Analyze the return values of a call,
+/// incorporating info about the passed values into this state.
+void CCState::AnalyzeCallResult(const SmallVectorImpl<ISD::InputArg> &Ins,
+                                CCAssignFn Fn) {
+  for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
+    MVT VT = Ins[i].VT;
+    ISD::ArgFlagsTy Flags = Ins[i].Flags;
+    if (Fn(i, VT, VT, CCValAssign::Full, Flags, *this)) {
+#ifndef NDEBUG
+      dbgs() << "Call result #" << i << " has unhandled type "
+             << EVT(VT).getEVTString() << '\n';
+#endif
+      llvm_unreachable(0);
+    }
+  }
+}
+
+/// AnalyzeCallResult - Same as above except it's specialized for calls which
+/// produce a single value.
+void CCState::AnalyzeCallResult(MVT VT, CCAssignFn Fn) {
+  if (Fn(0, VT, VT, CCValAssign::Full, ISD::ArgFlagsTy(), *this)) {
+#ifndef NDEBUG
+    dbgs() << "Call result has unhandled type "
+           << EVT(VT).getEVTString() << '\n';
+#endif
+    llvm_unreachable(0);
+  }
+}