[LangRef] fix the function result attributes location explanation and example

[khei4]

Summary

I'm confused with the locations of attributes for the function result. I believe they come "before the result type".

[nikic]

llvm/docs/LangRef.rst

1101–1102

You are right that attributes for the result come before the return type, but the example attributes this listed are actually function attributes, not return value attributes. So you might want to adjust then to something like nonnull and signext.

[khei4]

change examples also

llvm/docs/LangRef.rst

1101–1102

Oh, thanks! I should have checked it also!

[nikic]

LG

llvm/docs/LangRef.rst

 For example:
 
 .. code-block:: llvm
 
     declare i32 @printf(ptr noalias nocapture, ...)
     declare i32 @atoi(i8 zeroext)
     declare signext i8 @returns_signed_char()
 
-Note that any attributes for the function result (``nounwind``,
-``readonly``) come immediately after the argument list.
+Note that any attributes for the function result (``nonnull``,
+``signext``) come before the result type.
 
 Currently, only the following parameter attributes are defined:
 
 ``zeroext``
     This indicates to the code generator that the parameter or return
     value should be zero-extended to the extent required by the target's
     ABI by the caller (for a parameter) or the callee (for a return value).
 ``signext``