Driver: hoist the `wchar_t` handling to the driver
Move the logic for determining the `wchar_t` type information into the
driver. Rather than passing the single bit of information of
`-fshort-wchar` indicate to the frontend the desired type of `wchar_t`
through a new `-cc1` option of `-fwchar-type` and indicate the
signedness through `-f{,no-}signed-wchar`. This replicates the current
logic which was spread throughout Basic into the
`RenderCharacterOptions`.
Most of the changes to the tests are to ensure that the frontend uses
the correct type. Add a new test set under `test/Driver/wchar_t.c` to
ensure that we calculate the proper types for the various cases.
llvm-svn: 315126
diff --git a/clang/lib/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index d97ebb0..32f1232 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -386,6 +386,7 @@
Invocation->getPreprocessorOptsPtr(), getDiagnostics(), getLangOpts(),
getSourceManager(), getPCMCache(), *HeaderInfo, *this, PTHMgr,
/*OwnsHeaderSearch=*/true, TUKind);
+ getTarget().adjust(getLangOpts());
PP->Initialize(getTarget(), getAuxTarget());
// Note that this is different then passing PTHMgr to Preprocessor's ctor.