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Author SHA1 Message Date
Andrew Kaylor fdd48fa1e1 [WinEH] Re-committing r252249 (Clone funclets with multiple parents) with additional fixes for determinism problems 
Differential Revision: http://reviews.llvm.org/D14454

llvm-svn: 252508
 2015-11-09 19:59:02 +00:00
NAKAMURA Takumi 9947cacebf Revert r252249 (and r252255, r252258), "[WinEH] Clone funclets with multiple parents" 
It behaved flaky due to iterating pointer key values on std::set and std::map.

llvm-svn: 252279
 2015-11-06 10:07:33 +00:00
Andrew Kaylor f05a87dff3 Temporarily disable flaky checks in wineh-multi-parent-cloning. 
llvm-svn: 252258
 2015-11-06 01:15:04 +00:00
Andrew Kaylor 29cd576554 [WinEH] Clone funclets with multiple parents 
Windows EH funclets need to always return to a single parent funclet.  However, it is possible for earlier optimizations to combine funclets (probably based on one funclet having an unreachable terminator) in such a way that this condition is violated.

These changes add code to the WinEHPrepare pass to detect situations where a funclet has multiple parents and clone such funclets, fixing up the unwind and catch return edges so that each copy of the funclet returns to the correct parent funclet.

Differential Revision: http://reviews.llvm.org/D13274?id=39098

llvm-svn: 252249
 2015-11-06 00:20:50 +00:00