Use instruction itinerary to determine what instructions are 'cheap'.

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

diff --git a/include/llvm/CodeGen/CallingConvLower.h b/include/llvm/CodeGen/CallingConvLower.h
index 7911907e89435c8a292345ca6f455e669072895a..6fb843641dcd55d6efec3f108caf16a4d5585b07 100644 (file)
--- a/include/llvm/CodeGen/CallingConvLower.h
+++ b/include/llvm/CodeGen/CallingConvLower.h
@@ -275,6 +275,12 @@ public:
     return Result;
   }
 
+  /// Version of AllocateStack with extra register to be shadowed.
+  unsigned AllocateStack(unsigned Size, unsigned Align, unsigned ShadowReg) {
+    MarkAllocated(ShadowReg);
+    return AllocateStack(Size, Align);
+  }
+
   // 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.