Add "inreg" field to CallSDNode (doesn't increase

its size).  Adjust various lowering functions to
pass this info through from CallInst.  Use it to
implement sseregparm returns on X86.  Remove
X86_ssecall calling convention.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56677 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CallingConv.h

@@ -57,11 +57,7 @@ namespace CallingConv {
     /// X86_FastCall - 'fast' analog of X86_StdCall. Passes first two arguments
     /// in ECX:EDX registers, others - via stack. Callee is responsible for
     /// stack cleaning.
-    X86_FastCall = 65,
-
-    /// X86_SSEreg - The standard convention except that float and double
-    /// values are returned in XMM0 if SSE support is available.
-    X86_SSECall = 66
+    X86_FastCall = 65
   };
 } // End CallingConv namespace