Changed the tryfinally handlers to a more generalized EnclosingHandler.
Changed ClassInfoS to be mutable so they can be used as locks.
Added new BB after throw ala return/break etc.
Fixed problems with label collisions when using labels inside inline asm. LabelStatement is now easily reached given its
Identifier, which should be useful elsewhere too.
Enabled inline asm for building the lib/compiler/llvmdc runtime code, fixing branches out of asm makes this possible.
Added license info to code from GDC (David Friedman permitted us to use the files under the Artistic License).
Added asmLabel check to DtoGoto to avoid jumping into inline asm. Doesn't work currently as LabelDsymbol::asmLabel is never set to true.
Renamed emit_finallyblocks to DtoFinallyBlocks and moved to llvmhelpers.
Added enclosingtryfinally to AsmBlockStatement, so branches out of asm blocks respect finallys.
Refactored some GotoStatement code into DtoGoto.
Tried adding a stack trace print when compiler crashes, not sure it's working though.
Changed data layouts to match that of llvm-gcc.
Fixed casting function pointers.
Added support checks in AsmStatement.
