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Author: Simon Pilgrim <llvm-dev@redking.me.uk> Date: Mon Feb 23 23:04:28 2015 +0000 Fix based on post-commit comment on D7816 & rL230177 - BUILD_VECTOR operand truncation was using the the BV's output scalar type instead of the input type. and Author: Simon Pilgrim <llvm-dev@redking.me.uk> Date: Sun Feb 22 18:17:28 2015 +0000 [DagCombiner] Generalized BuildVector Vector Concatenation The CONCAT_VECTORS combiner pass can transform the concat of two BUILD_VECTOR nodes into a single BUILD_VECTOR node. This patch generalises this to support any number of BUILD_VECTOR nodes, and also permits UNDEF nodes to be included as well. This was noticed as AVX vec128 -> vec256 canonicalization sometimes creates a CONCAT_VECTOR with a real vec128 lower and an vec128 UNDEF upper. Differential Revision: http://reviews.llvm.org/D7816 as the root cause of PR22678 which is causing an assertion inside the DAG combiner. I'll follow up to the main thread as well. llvm-svn: 230358 |
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