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7 Commits

Author SHA1 Message Date
Reid Kleckner 5c5facc2ce Re-commit "[SEH] Remove the old __C_specific_handler code now that WinEHPrepare works" 
This reverts commit r235617.

r235649 should have addressed the problems.

llvm-svn: 235667
 2015-04-23 23:22:33 +00:00
Reid Kleckner 909ea7e6b8 Revert "[SEH] Remove the old __C_specific_handler code now that WinEHPrepare works" 
We still have some "uses remain after removal" issues in -O0 builds.

This reverts commit r235557.

llvm-svn: 235617
 2015-04-23 18:34:01 +00:00
Reid Kleckner 64a2a6a473 [SEH] Remove the old __C_specific_handler code now that WinEHPrepare works 
This removes the -sehprepare flag and makes __C_specific_handler
functions always to use WinEHPrepare.

This was tested by building all of chromium_builder_tests and running a
few tests that use SEH, but if something breaks, we can revert this.

llvm-svn: 235557
 2015-04-22 22:13:09 +00:00
Reid Kleckner d2a1a51996 Re-land r235154-r235156 under the existing -sehprepare flag 
Keep the old SEH fan-in lowering on by default for now, since projects
rely on it.  This will make it easy to test this change with a simple
flag flip.

llvm-svn: 235399
 2015-04-21 18:23:57 +00:00
Nico Weber a762fa6c98 Revert r235154-r235156, they cause asserts when building win64 code (http://crbug.com/477988) 
llvm-svn: 235170
 2015-04-17 09:10:43 +00:00
Reid Kleckner 56cc879ac1 Fix test failure due to racing commits 
It looks like r235145 changed the .ll syntax for variadic calls. Update
tests to use the new syntax.

llvm-svn: 235156
 2015-04-17 01:09:53 +00:00
Reid Kleckner d4523e3c51 [SEH] Reimplement x64 SEH using WinEHPrepare 
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
 2015-04-17 01:01:27 +00:00