Convert more static tables of registers used by calling convention to uint16_t to reduce space.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152538 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86FastISel.cpp b/lib/Target/X86/X86FastISel.cpp
index f90764e..3d63b7e 100644
--- a/lib/Target/X86/X86FastISel.cpp
+++ b/lib/Target/X86/X86FastISel.cpp
@@ -1779,7 +1779,7 @@
 
   if (Subtarget->is64Bit() && isVarArg && !Subtarget->isTargetWin64()) {
     // Count the number of XMM registers allocated.
-    static const unsigned XMMArgRegs[] = {
+    static const uint16_t XMMArgRegs[] = {
       X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
       X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7
     };