musttail: Forward regparms of variadic functions on x86_64

[oota-llvm.git] / include / llvm / CodeGen / MachineFrameInfo.h

diff --git a/include/llvm/CodeGen/MachineFrameInfo.h b/include/llvm/CodeGen/MachineFrameInfo.h
index dca809177d4b07a2b62cb8614a64b144bd9e7235..e947c3026975a2c624042194c8de9cd618ca2a95 100644 (file)
--- a/include/llvm/CodeGen/MachineFrameInfo.h
+++ b/include/llvm/CodeGen/MachineFrameInfo.h
@@ -239,6 +239,9 @@ class MachineFrameInfo {
   /// True if the function contains a call to the llvm.vastart intrinsic.
   bool HasVAStart;
 
+  /// True if this is a varargs function that contains a musttail call.
+  bool HasMustTailInVarArgFunc;
+
   const TargetFrameLowering *getFrameLowering() const;
 public:
     explicit MachineFrameInfo(const TargetMachine &TM, bool RealignOpt)
@@ -260,6 +263,7 @@ public:
     UseLocalStackAllocationBlock = false;
     HasInlineAsmWithSPAdjust = false;
     HasVAStart = false;
+    HasMustTailInVarArgFunc = false;
   }
 
   /// hasStackObjects - Return true if there are any stack objects in this
@@ -483,6 +487,10 @@ public:
   bool hasVAStart() const { return HasVAStart; }
   void setHasVAStart(bool B) { HasVAStart = B; }
 
+  /// Returns true if the function is variadic and contains a musttail call.
+  bool hasMustTailInVarArgFunc() const { return HasMustTailInVarArgFunc; }
+  void setHasMustTailInVarArgFunc(bool B) { HasMustTailInVarArgFunc = B; }
+
   /// getMaxCallFrameSize - Return the maximum size of a call frame that must be
   /// allocated for an outgoing function call.  This is only available if
   /// CallFrameSetup/Destroy pseudo instructions are used by the target, and