1 files changed, 136 insertions, 0 deletions
diff --git a/lib/Target/Mips/MipsCCState.h b/lib/Target/Mips/MipsCCState.h
new file mode 100644
index 0000000..cc4531d
--- /dev/null
+++ b/lib/Target/Mips/MipsCCState.h
@@ -0,0 +1,136 @@
+//===---- MipsCCState.h - CCState with Mips specific extensions -----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef MIPSCCSTATE_H
+#define MIPSCCSTATE_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/CodeGen/CallingConvLower.h"
+#include "MipsISelLowering.h"
+
+namespace llvm {
+class SDNode;
+class MipsSubtarget;
+
+class MipsCCState : public CCState {
+public:
+  enum SpecialCallingConvType { Mips16RetHelperConv, NoSpecialCallingConv };
+
+  /// Determine the SpecialCallingConvType for the given callee
+  static SpecialCallingConvType
+  getSpecialCallingConvForCallee(const SDNode *Callee,
+                                 const MipsSubtarget &Subtarget);
+
+private:
+  /// Identify lowered values that originated from f128 arguments and record
+  /// this for use by RetCC_MipsN.
+  void PreAnalyzeCallResultForF128(const SmallVectorImpl<ISD::InputArg> &Ins,
+                                   const TargetLowering::CallLoweringInfo &CLI);
+
+  /// Identify lowered values that originated from f128 arguments and record
+  /// this for use by RetCC_MipsN.
+  void PreAnalyzeReturnForF128(const SmallVectorImpl<ISD::OutputArg> &Outs);
+
+  /// Identify lowered values that originated from f128 arguments and record
+  /// this.
+  void
+  PreAnalyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs,
+                         std::vector<TargetLowering::ArgListEntry> &FuncArgs,
+                         const SDNode *CallNode);
+
+  /// Identify lowered values that originated from f128 arguments and record
+  /// this.
+  void
+  PreAnalyzeFormalArgumentsForF128(const SmallVectorImpl<ISD::InputArg> &Ins);
+
+  /// Records whether the value has been lowered from an f128.
+  SmallVector<bool, 4> OriginalArgWasF128;
+
+  /// Records whether the value has been lowered from float.
+  SmallVector<bool, 4> OriginalArgWasFloat;
+
+  /// Records whether the value was a fixed argument.
+  /// See ISD::OutputArg::IsFixed,
+  SmallVector<bool, 4> CallOperandIsFixed;
+
+  // Used to handle MIPS16-specific calling convention tweaks.
+  // FIXME: This should probably be a fully fledged calling convention.
+  SpecialCallingConvType SpecialCallingConv;
+
+public:
+  MipsCCState(CallingConv::ID CC, bool isVarArg, MachineFunction &MF,
+              SmallVectorImpl<CCValAssign> &locs, LLVMContext &C,
+              SpecialCallingConvType SpecialCC = NoSpecialCallingConv)
+      : CCState(CC, isVarArg, MF, locs, C), SpecialCallingConv(SpecialCC) {}
+
+  void
+  AnalyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs,
+                      CCAssignFn Fn,
+                      std::vector<TargetLowering::ArgListEntry> &FuncArgs,
+                      const SDNode *CallNode) {
+    PreAnalyzeCallOperands(Outs, FuncArgs, CallNode);
+    CCState::AnalyzeCallOperands(Outs, Fn);
+    OriginalArgWasF128.clear();
+    OriginalArgWasFloat.clear();
+    CallOperandIsFixed.clear();
+  }
+
+  // The AnalyzeCallOperands in the base class is not usable since we must
+  // provide a means of accessing ArgListEntry::IsFixed. Delete them from this
+  // class. This doesn't stop them being used via the base class though.
+  void AnalyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs,
+                           CCAssignFn Fn) LLVM_DELETED_FUNCTION;
+  void AnalyzeCallOperands(const SmallVectorImpl<MVT> &Outs,
+                           SmallVectorImpl<ISD::ArgFlagsTy> &Flags,
+                           CCAssignFn Fn) LLVM_DELETED_FUNCTION;
+
+  void AnalyzeFormalArguments(const SmallVectorImpl<ISD::InputArg> &Ins,
+                              CCAssignFn Fn) {
+    PreAnalyzeFormalArgumentsForF128(Ins);
+    CCState::AnalyzeFormalArguments(Ins, Fn);
+    OriginalArgWasFloat.clear();
+    OriginalArgWasF128.clear();
+  }
+
+  void AnalyzeCallResult(const SmallVectorImpl<ISD::InputArg> &Ins,
+                         CCAssignFn Fn,
+                         const TargetLowering::CallLoweringInfo &CLI) {
+    PreAnalyzeCallResultForF128(Ins, CLI);
+    CCState::AnalyzeCallResult(Ins, Fn);
+    OriginalArgWasFloat.clear();
+    OriginalArgWasF128.clear();
+  }
+
+  void AnalyzeReturn(const SmallVectorImpl<ISD::OutputArg> &Outs,
+                     CCAssignFn Fn) {
+    PreAnalyzeReturnForF128(Outs);
+    CCState::AnalyzeReturn(Outs, Fn);
+    OriginalArgWasFloat.clear();
+    OriginalArgWasF128.clear();
+  }
+
+  bool CheckReturn(const SmallVectorImpl<ISD::OutputArg> &ArgsFlags,
+                   CCAssignFn Fn) {
+    PreAnalyzeReturnForF128(ArgsFlags);
+    bool Return = CCState::CheckReturn(ArgsFlags, Fn);
+    OriginalArgWasFloat.clear();
+    OriginalArgWasF128.clear();
+    return Return;
+  }
+
+  bool WasOriginalArgF128(unsigned ValNo) { return OriginalArgWasF128[ValNo]; }
+  bool WasOriginalArgFloat(unsigned ValNo) {
+      return OriginalArgWasFloat[ValNo];
+  }
+  bool IsCallOperandFixed(unsigned ValNo) { return CallOperandIsFixed[ValNo]; }
+  SpecialCallingConvType getSpecialCallingConv() { return SpecialCallingConv; }
+};
+}
+
+#endif