2 Commits

Author	SHA1	Message	Date
Reid Kleckner	0a57f65514	CodeGen support for x86_64 SEH catch handlers in LLVM ... This adds handling for ExceptionHandling::MSVC, used by the x86_64-pc-windows-msvc triple. It assumes that filter functions have already been outlined in either the frontend or the backend. Filter functions are used in place of the landingpad catch clause type info operands. In catch clause order, the first filter to return true will catch the exception. The C specific handler table expects the landing pad to be split into one block per handler, but LLVM IR uses a single landing pad for all possible unwind actions. This patch papers over the mismatch by synthesizing single instruction BBs for every catch clause to fill in the EH selector that the landing pad block expects. Missing functionality: - Accessing data in the parent frame from outlined filters - Cleanups (from __finally) are unsupported, as they will require outlining and parent frame access - Filter clauses are unsupported, as there's no clear analogue in SEH In other words, this is the minimal set of changes needed to write IR to catch arbitrary exceptions and resume normal execution. Reviewers: majnemer Differential Revision: http://reviews.llvm.org/D6300 llvm-svn: 225904	2015-01-14 01:05:27 +00:00
Saleem Abdulrasool	0fba7b5856	CodeGen: split out the Win64Exception emitter ... Move the Windows unwind information emitter into a separate header. This is not related to DWARF based emission. NFC. llvm-svn: 216894	2014-09-01 23:48:34 +00:00