Alphabetize the function attributes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174490 91177308-0d34-0410-b5e6-96231b3b80d8
Remove unused private field to suppress a build warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174491 91177308-0d34-0410-b5e6-96231b3b80d8
Remove extra blank line between closing curly brace and 'else'

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174492 91177308-0d34-0410-b5e6-96231b3b80d8
Initial submission for the attribute group feature.

Attribute groups are of the form:

  #0 = attributes { noinline "no-sse" "cpu"="cortex-a8" alignstack=4 }

Target-dependent attributes are represented as strings. Attributes can have
optional values associated with them. E.g., the "cpu" attribute has the value
"cortex-a8".

Target-independent attributes are listed as enums inside the attribute classes.

Multiple attribute groups can be referenced by the same object. In that case,
the attributes are merged together.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174493 91177308-0d34-0410-b5e6-96231b3b80d8