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Author SHA1 Message Date
Richard Smith caf3390d44 Constant expression evaluation refactoring: 
- Remodel Expr::EvaluateAsInt to behave like the other EvaluateAs* functions,
   and add Expr::EvaluateKnownConstInt to capture the current fold-or-assert
   behaviour.
 - Factor out evaluation of bitfield bit widths.
 - Fix a few places which would evaluate an expression twice: once to determine
   whether it is a constant expression, then again to get the value.

llvm-svn: 141561
 2011-10-10 18:28:20 +00:00
Peter Collingbourne bf8989fd19 Make clang-tblgen's Makefile independent of Clang's top-level Makefile, 
to avoid having to make it available for the cross build when it
builds only clang-tblgen.

llvm-svn: 141453
 2011-10-08 00:26:35 +00:00
Peter Collingbourne bee583fd6e Add the Clang tblgen backends to Clang, and flip the switch to cause 
the build systems to use clang-tblgen.

llvm-svn: 141291
 2011-10-06 13:03:08 +00:00