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52ead7bcab
This now emits simple, unoptimized xdata tables for __C_specific_handler based on the handlers listed in @llvm.eh.actions calls produced by WinEHPrepare. This adds support for running __finally blocks when exceptions are thrown, and removes the old landingpad fan-in codepath. I ran some manual execution tests on small basic test cases with and without optimization, as well as on Chrome base_unittests, which uses a small amount of SEH. I'm sure there are bugs, and we may need to revert. llvm-svn: 235154
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