Keno Fischer 2eee2e2c5e Fix performance problem in long-running SectionMemoryManagers ... Summary: Without this patch, the memory manager would call `mprotect` on every memory region it ever allocated whenever it wanted to finalize memory (i.e. not just the ones it just allocated). This caused terrible performance problems for long running memory managers. In one particular compile heavy julia benchmark, we were spending 50% of time in `mprotect` if running under MCJIT. Fix this by splitting allocated memory blocks into those on which memory permissions have been set and those on which they haven't and only running `mprotect` on the latter. Reviewers: lhames Subscribers: reames, llvm-commits Differential Revision: http://reviews.llvm.org/D13156 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@248981 91177308-0d34-0410-b5e6-96231b3b80d8		2015-10-01 02:45:07 +00:00
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llvm	Fix performance problem in long-running SectionMemoryManagers	2015-10-01 02:45:07 +00:00
llvm-c	[WinEH] Add cleanupendpad instruction	2015-09-03 09:09:43 +00:00