Matthew Simpson b74ea1ef12 [SLP] Avoid signed integer overflow ... The test case included with r279125 exposed an existing signed integer overflow. Since getTreeCost can return INT_MAX, we can't sum this cost together with other costs, such as getReductionCost. This patch removes the possibility of assigning a cost of INT_MAX. Since we were previously using INT_MAX as an indicator for "should not vectorize", we now explicitly check this condition with "isTreeTinyAndNotFullyVectorizable" before computing a cost. This patch adds a run-line to the test case used for r279125 that ensures we don't vectorize. Previously, this line would vectorize the test case by chance due to undefined behavior in the cost calculation. Differential Revision: https://reviews.llvm.org/D23723 llvm-svn: 279562		2016-08-23 20:48:50 +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	[X86][SSE] Add initial costs for vector CTTZ/CTLZ	2016-08-04 10:51:41 +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