llvm/test/Transforms/LoopUnswitch, branch release_31http://llvm.orghttps://git.amat.us/llvm/atom/test/Transforms/LoopUnswitch?h=release_312012-04-30T17:48:14ZMerging r155817:2012-04-30T17:48:14ZBill Wendlingisanbard@gmail.com2012-04-30T17:48:14Zurn:sha1:458cf3ee70dea5a733a5b16286c5d7eb98a108d3
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r155817 | void | 2012-04-30 03:44:54 -0700 (Mon, 30 Apr 2012) | 9 lines
Second attempt at PR12573:
Allow the "SplitCriticalEdge" function to split the edge to a landing pad. If
the pass is *sure* that it thinks it knows what it's doing, then it may go ahead
and specify that the landing pad can have its critical edge split. The loop
unswitch pass is one of these passes. It will split the critical edges of all
edges coming from a loop to a landing pad not within the loop. Doing so will
retain important loop analysis information, such as loop simplify.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_31@155833 91177308-0d34-0410-b5e6-96231b3b80d8
Fix 12513: Loop unrolling breaks with indirect branches.2012-04-10T05:14:42ZAndrew Trickatrick@apple.com2012-04-10T05:14:42Zurn:sha1:d9fc1ce8096f7138c60edc3a6655583bf209780e
Take this opportunity to generalize the indirectbr bailout logic for
loop transformations. CFG transformations will never get indirectbr
right, and there's no point trying.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154386 91177308-0d34-0410-b5e6-96231b3b80d8
Fast fix for PR12343:2012-04-02T17:16:45ZStepan Dyatkovskiystpworld@narod.ru2012-04-02T17:16:45Zurn:sha1:aad9c3f17a73b3104f4a3673a2dc511a4878e20e
http://llvm.org/bugs/show_bug.cgi?id=12343
We have not trivial way for splitting edges that are goes from indirect branch. We can do it with some tricks, but it should be additionally discussed. And it is still dangerous due to difficulty of indirect branches controlling.
Fix forbids this case for unswitching.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153879 91177308-0d34-0410-b5e6-96231b3b80d8
Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed.2012-02-16T06:28:33ZEli Benderskyeli.bendersky@intel.com2012-02-16T06:28:33Zurn:sha1:0f0c411079cd21bb3a81a1b70bf8c67539a16c22
Patch reviewed by Daniel Dunbar. It will be followed by additional cleanup patches.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150664 91177308-0d34-0410-b5e6-96231b3b80d8
Improved compile time:2012-01-11T08:40:51ZStepan Dyatkovskiystpworld@narod.ru2012-01-11T08:40:51Zurn:sha1:88c5c42c5c832f599b34a5f5f4d361b9c1eacf6c
1. Size heuristics changed. Now we calculate number of unswitching
branches only once per loop.
2. Some checks was moved from UnswitchIfProfitable to
processCurrentLoop, since it is not changed during processCurrentLoop
iteration. It allows decide to skip some loops at an early stage.
Extended statistics:
- Added total number of instructions analyzed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147935 91177308-0d34-0410-b5e6-96231b3b80d8
Reinstate r146578; it doesn't appear to be the cause of some recent execution-2011-12-22T21:06:36ZChad Rosiermcrosier@apple.com2011-12-22T21:06:36Zurn:sha1:f1eba253038ab480abb43ea33909e9095b1321a7
time regressions. In general, it is beneficial to compile-time.
Original commit message:
Fix for bug #11429: Wrong behaviour for switches. Small improvement for code
size heuristics.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147175 91177308-0d34-0410-b5e6-96231b3b80d8
Speculatively revert r146578 to determine if it is the cause of a number of2011-12-22T02:40:57ZChad Rosiermcrosier@apple.com2011-12-22T02:40:57Zurn:sha1:5ddb7a0105a71faf86bed587b1682a3add99e551
performance regressions (both execution-time and compile-time) on our
nightly testers.
Original commit message:
Fix for bug #11429: Wrong behaviour for switches. Small improvement for code
size heuristics.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147131 91177308-0d34-0410-b5e6-96231b3b80d8
Fix for bug #11429: Wrong behaviour for switches. Small improvement for code size heuristics.2011-12-14T19:19:17ZStepan Dyatkovskiystpworld@narod.ru2011-12-14T19:19:17Zurn:sha1:ac12ef4ad22de941655c889f319a4c6923b77620
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146578 91177308-0d34-0410-b5e6-96231b3b80d8
Split the landing pad basic block with the correct function. Also merge the2011-09-27T00:59:31ZBill Wendlingisanbard@gmail.com2011-09-27T00:59:31Zurn:sha1:d5520987d146487733e2453c8f0cf6ddd0f6ceba
split landingpad instructions into a PHI node.
PR11016
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140592 91177308-0d34-0410-b5e6-96231b3b80d8
Bail on unswitching a switch statement for a case with a critical edge. We name2011-06-03T06:27:15ZNick Lewyckynicholas@mxc.ca2011-06-03T06:27:15Zurn:sha1:444f297a782047fbe6255a3543bc3ccd025c0691
which edge to split by pred/succ pair, which means that we can end up splitting
the wrong edge (by case value) in the switch statement entirely. Fixes PR10031!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132535 91177308-0d34-0410-b5e6-96231b3b80d8