commit aa06e492259ae1227100f659ce510ea3588d777b
author Simon Pilgrim <llvm-dev@redking.me.uk> Wed Aug 24 18:07:53 2016 +0000
committer Simon Pilgrim <llvm-dev@redking.me.uk> Wed Aug 24 18:07:53 2016 +0000
tree b826ca73c643e4d733c1fb47e0e18bfb549c4d9c
parent 8f3d1c879fffec9fa8d822030471175d066fbafc

[X86][SSE] Add support for combining VZEXT_MOVL target shuffles

Includes adding more general support for the pattern: VZEXT_MOVL(VZEXT_LOAD(ptr)) -> VZEXT_LOAD(ptr)

This has unearthed a couple of latent poor codegen issues (MINSS/MAXSS scalar load folding and MOVDDUP/BROADCAST load folding patterns), which will be fixed shortly.

Its also reduced a couple of tests so that they no longer reach the instruction threshold necessary to be combined to PSHUFB (see PR26183).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@279646 91177308-0d34-0410-b5e6-96231b3b80d8