Match new shuffle codegen for MOVHPD patterns (PR21791)

[Demikhovsky, Elena]

Hi Sanjay,

I suggest to leave the store pattern for unpck inside.
All other LGTM

-  Elena


-----Original Message-----
From: Sanjay Patel [mailto:spatel at rotateright.com] 
Sent: Wednesday, December 10, 2014 02:31
To: spatel at rotateright.com; hfinkel at anl.gov; Demikhovsky, Elena; Andrea_DiBiagio at sn.scee.net; llvm-dev at redking.me.uk
Cc: llvm-commits at cs.uiuc.edu
Subject: [PATCH] Match new shuffle codegen for MOVHPD patterns (PR21791)

Hi hfinkel, delena, andreadb, RKSimon,

This patch adds patterns to match SSE (shufpd) and AVX (vpermilpd) shuffle codegen when storing the high element of a v2f64. The existing patterns were only checking for an unpckh type of shuffle. ( http://llvm.org/bugs/show_bug.cgi?id=21791 )

http://reviews.llvm.org/D6586

Files:
  lib/Target/X86/X86InstrSSE.td
  test/CodeGen/X86/extractelement-load.ll
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