8 Commits

Author	SHA1	Message	Date
Bill Wendling	20e469e99b	Validation fixes ... llvm-svn: 42232	2007-09-22 10:17:08 +00:00
Anton Korobeynikov	122bf4be7e	Split eh.select / eh.typeid.for intrinsics into i32/i64 versions. This is needed, because they just "mark" register ... liveins and we let frontend solve type issue, not lowering code :) llvm-svn: 41763	2007-09-07 11:39:35 +00:00
Duncan Sands	ef5a654216	There is an impedance matching problem between LLVM and ... gcc exception handling: if an exception unwinds through an invoke, then execution must branch to the invoke's unwind target. We previously tried to enforce this by appending a cleanup action to every selector, however this does not always work correctly due to an optimization in the C++ unwinding runtime: if only cleanups would be run while unwinding an exception, then the program just terminates without actually executing the cleanups, as invoke semantics would require. I was hoping this wouldn't be a problem, but in fact it turns out to be the cause of all the remaining failures in the LLVM testsuite (these also fail with -enable-correct-eh-support, so turning on -enable-eh didn't make things worse!). Instead we need to append a full-blown catch-all to the end of each selector. The correct way of doing this depends on the personality function, i.e. it is language dependent, so can only be done by gcc. Thus this patch which generalizes the eh.selector intrinsic so that it can handle all possible kinds of action table entries (before it didn't accomodate cleanups): now 0 indicates a cleanup, and filters have to be specified using the number of type infos plus one rather than the number of type infos. Related gcc patches will cause Ada to pass a cleanup (0) to force the selector to always fire, while C++ will use a C++ catch-all (null). llvm-svn: 41484	2007-08-27 15:47:50 +00:00
Duncan Sands	fe80638417	Extend eh.selector to support both catches and filters. ... Drop the eh.filter intrinsic. llvm-svn: 37875	2007-07-04 20:52:51 +00:00
Duncan Sands	085b45e1f1	Fix typos. ... llvm-svn: 36124	2007-04-16 13:02:27 +00:00
Duncan Sands	b4a7326c20	Correct typo. ... llvm-svn: 35989	2007-04-14 12:30:27 +00:00
Duncan Sands	16f122e6ad	Various hopefully correct easy fixes. ... llvm-svn: 35506	2007-03-30 12:22:09 +00:00
Jim Laskey	6956773583	First draft of exception handling doc. ... llvm-svn: 35100	2007-03-14 19:29:42 +00:00