Alexey Bataev 29965753c8 [SLP] Fix for PR32036: Vectorized horizontal reduction returning wrong ... result Summary: If the same value is used several times as an extra value, SLP vectorizer takes it into account only once instead of actual number of using. For example: ``` int val = 1; for (int y = 0; y < 8; y++) { for (int x = 0; x < 8; x++) { val = val + input[y * 8 + x] + 3; } } ``` We have 2 extra rguments: `1` - initial value of horizontal reduction and `3`, which is added 8*8 times to the reduction. Before the patch we added `1` to the reduction value and added once `3`, though it must be added 64 times. Reviewers: mkuper, mzolotukhin Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D30262 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@295949 91177308-0d34-0410-b5e6-96231b3b80d8		2017-02-23 09:40:38 +00:00
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AArch64	[SLP] Avoid signed integer overflow	2016-08-23 20:48:50 +00:00
AMDGPU	[SLPVectorizer] Try different vectorization factors for store chains	2015-07-08 23:40:55 +00:00
ARM	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00
PowerPC	[SLP] Pass in correct alignment when query memory access cost	2016-05-31 20:41:19 +00:00
X86	[SLP] Fix for PR32036: Vectorized horizontal reduction returning wrong	2017-02-23 09:40:38 +00:00
XCore	[opaque pointer type] Add textual IR support for explicit type parameter to load instruction	2015-02-27 21:17:42 +00:00