5 Commits

Author	SHA1	Message	Date
Eric Christopher	cee313d288	Revert "Temporarily Revert "Add basic loop fusion pass."" ... The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552	2019-04-17 04:52:47 +00:00
Eric Christopher	a863435128	Temporarily Revert "Add basic loop fusion pass." ... As it's causing some bot failures (and per request from kbarton). This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda. llvm-svn: 358546	2019-04-17 02:12:23 +00:00
Alexey Bataev	2a2f35d59c	[SLP] Fix for PR31879: vectorize repeated scalar ops that don't get put ... back into a vector Previously the cost of the existing ExtractElement/ExtractValue instructions was considered as a dead cost only if it was detected that they have only one use. But these instructions may be considered dead also if users of the instructions are also going to be vectorized, like: ``` %x0 = extractelement <2 x float> %x, i32 0 %x1 = extractelement <2 x float> %x, i32 1 %x0x0 = fmul float %x0, %x0 %x1x1 = fmul float %x1, %x1 %add = fadd float %x0x0, %x1x1 ``` This can be transformed to ``` %1 = fmul <2 x float> %x, %x %2 = extractelement <2 x float> %1, i32 0 %3 = extractelement <2 x float> %1, i32 1 %add = fadd float %2, %3 ``` because though `%x0` and `%x1` have 2 users each other, these users are part of the vectorized tree and we can consider these `extractelement` instructions as dead. Differential Revision: https://reviews.llvm.org/D29900 llvm-svn: 295056	2017-02-14 15:20:48 +00:00
Alexey Bataev	4ed47342ff	[SLP] Additional tests for extractelement cost fix. ... llvm-svn: 295050	2017-02-14 12:52:05 +00:00
Alexey Bataev	7bed48e7a3	[SLP] Test for extractelement cost fix. ... llvm-svn: 294980	2017-02-13 19:08:19 +00:00