tree 7d74f6f2933d40483d1d762e4f634c3e153f090e
parent 0d3c26c76997688eaf7e51764a66815652e09642
author Douglas Gregor <dgregor@apple.com> 1246984542 +0000
committer Douglas Gregor <dgregor@apple.com> 1246984542 +0000

Make ASTContext explicitly keep track of the declaration for the C
FILE type, rather than using name lookup to find FILE within the
translation unit. Within precompiled headers, FILE is treated as yet
another "special type" (like __builtin_va_list).

This change should provide a performance improvement (not verified),
since the lookup into the translation unit declaration 
forces the (otherwise unneeded) construction of a large hash table.
More importantly, with precompiled headers, the construction
of that table requires deserializing most of the top-level
declarations from the precompiled header, which are then unused.

Fixes PR 4509.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@74911 91177308-0d34-0410-b5e6-96231b3b80d8