Commit Graph

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