tree 95ac57feea37d4a6ec60af51a3995260ce4e7590
parent b3b5e6cb65814f0ea9f2989d7f68f67877637b65
author Justin Bogner <mail@justinbogner.com> 1382331748 +0000
committer Justin Bogner <mail@justinbogner.com> 1382331748 +0000

Lex: Don't restrict legal UCNs when preprocessing assembly

The C and C++ standards disallow using universal character names to
refer to some characters, such as basic ascii and control characters,
so we reject these sequences in the lexer. However, when the
preprocessor isn't being used on C or C++, it doesn't make sense to
apply these restrictions.

Notably, accepting these characters avoids issues with unicode escapes
when GHC uses the compiler as a preprocessor on haskell sources.

Fixes rdar://problem/14742289

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193067 91177308-0d34-0410-b5e6-96231b3b80d8