Add the byval attribute

llvm-svn: 37940
diff --git a/llvm/lib/AsmParser/llvmAsmParser.y b/llvm/lib/AsmParser/llvmAsmParser.y
index 94aeeca..c879081 100644
--- a/llvm/lib/AsmParser/llvmAsmParser.y
+++ b/llvm/lib/AsmParser/llvmAsmParser.y
@@ -1101,7 +1101,7 @@
 %token <OtherOpVal> EXTRACTELEMENT INSERTELEMENT SHUFFLEVECTOR
 
 // Function Attributes
-%token NORETURN INREG SRET NOUNWIND NOALIAS
+%token NORETURN INREG SRET NOUNWIND NOALIAS BYVAL
 
 // Visibility Styles
 %token DEFAULT HIDDEN PROTECTED
@@ -1229,6 +1229,7 @@
               | INREG   { $$ = ParamAttr::InReg;     }
               | SRET    { $$ = ParamAttr::StructRet; }
               | NOALIAS { $$ = ParamAttr::NoAlias;   }
+              | BYVAL   { $$ = ParamAttr::ByVal;   }
               ;
 
 OptParamAttrs : /* empty */  { $$ = ParamAttr::None; }