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6 Commits

Author SHA1 Message Date
Davide Italiano
e92bed3b5e [PM] Port MergedLoadStoreMotion to the new pass manager, take two. 
This is indeed a much cleaner approach (thanks to Daniel Berlin
for pointing out), and also David/Sean for review.

Differential Revision:  http://reviews.llvm.org/D21454


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@273032 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-06-17 19:10:09 +00:00
Davide Italiano
705956ea8f [PM] Revert the port of MergeLoadStoreMotion to the new pass manager. 
Daniel Berlin expressed some real concerns about the port and proposed
and alternative approach. I'll revert this for now while working on a
new patch, which I hope to put up for review shortly. Sorry for the churn.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272925 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-06-16 17:40:53 +00:00
Davide Italiano
cd472d1a69 Placate bots fixing a typo in AA-pipeline description. Sorry. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272608 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-06-14 01:11:12 +00:00
Davide Italiano
d4b40fab55 [PM] Port MergedLoadStoreMotion to the new pass manager. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272606 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-06-14 00:49:23 +00:00
Eli Friedman
9d9bfcf418 [MergedLoadStoreMotion] Use correct helper for load hoist safety. 
It isn't legal to hoist a load past a call which might not return;
even if it doesn't throw, it could, for example, call exit().

Fixes http://llvm.org/PR27953.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272495 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-06-12 02:11:20 +00:00
David Majnemer
8ac7be5005 [MergedLoadStoreMotion] Don't transform across may-throw calls 
It is unsafe to hoist a load before a function call which may throw, the
throw might prevent a pointer dereference.

Likewise, it is unsafe to sink a store after a call which may throw.
The caller might be able to observe the difference.

This fixes PR27858.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@270828 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-05-26 07:11:09 +00:00