Clean up assignment of CalleeSaveStackSlotSize: get rid of the default and explicitly set this in every target that needs to change it from the default.

llvm-svn: 173270
diff --git a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCAsmInfo.cpp b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCAsmInfo.cpp
index 215aa40..b048427 100644
--- a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCAsmInfo.cpp
+++ b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCAsmInfo.cpp
@@ -17,8 +17,9 @@
 void PPCMCAsmInfoDarwin::anchor() { }
 
 PPCMCAsmInfoDarwin::PPCMCAsmInfoDarwin(bool is64Bit) {
-  if (is64Bit)
-    PointerSize = 8;
+  if (is64Bit) {
+    PointerSize = CalleeSaveStackSlotSize = 8;
+  }
   IsLittleEndian = false;
 
   PCSymbol = ".";