Add support for having different alignment for objects on call frames.
The x86-64 ABI states that objects passed on the stack have
8 byte alignment. Implement that.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41768 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86Subtarget.h b/lib/Target/X86/X86Subtarget.h
index 493c801..d939bc0 100644
--- a/lib/Target/X86/X86Subtarget.h
+++ b/lib/Target/X86/X86Subtarget.h
@@ -146,7 +146,7 @@
   std::string getDataLayout() const {
     const char *p;
     if (is64Bit())
-      p = "e-p:64:64-f64:64:64-i64:64:64-f80:128:128";
+      p = "e-p:64:64-s:64-f64:64:64-i64:64:64-f80:128:128";
     else {
       if (isTargetDarwin())
         p = "e-p:32:32-f64:32:64-i64:32:64-f80:128:128";