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11 Commits

Author SHA1 Message Date
Simon Pilgrim 0261597a5e [X86][SSE] Change BUILD_VECTOR interleaving ordering to improve coalescing/combine opportunities 
We currently generate BUILD_VECTOR as a tree of UNPCKL shuffles of the same type:

e.g. for v4f32:

Step 1: unpcklps 0, 2 ==> X: <?, ?, 2, 0>
      : unpcklps 1, 3 ==> Y: <?, ?, 3, 1>
Step 2: unpcklps X, Y ==>    <3, 2, 1, 0>

The issue is because we are not placing sequential vector elements together early enough, we fail to recognise many combinable patterns - consecutive scalar loads, extractions etc.

Instead, this patch unpacks progressively larger sequential vector elements together:

e.g. for v4f32:

Step 1: unpcklps 0, 2 ==> X: <?, ?, 1, 0>
      : unpcklps 1, 3 ==> Y: <?, ?, 3, 2>
Step 2: unpcklpd X, Y ==>    <3, 2, 1, 0>

This does mean that we are creating UNPCKL shuffle of different value types, but the relevant combines that benefit from this are quite capable of handling the additional BITCASTs that are now included in the shuffle tree.

Differential Revision: https://reviews.llvm.org/D33864

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@304688 91177308-0d34-0410-b5e6-96231b3b80d8
 2017-06-04 20:12:04 +00:00
Simon Pilgrim 22b377c4f5 [X86][SSE] Check vec_set BUILD_VECTOR tests on both 32 and 64-bit targets 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@302683 91177308-0d34-0410-b5e6-96231b3b80d8
 2017-05-10 15:52:59 +00:00
Simon Pilgrim 2a4643560e [X86][SSE] Regenerated the vec_set tests. 
Replaced lots of dodgy greps with actual codegen

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265163 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-04-01 17:40:25 +00:00
Rafael Espindola 4aa8bdaa46 Rename features to match what gcc and clang use. 
There is no advantage in being different and using the same names simplifies
clang a bit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189141 91177308-0d34-0410-b5e6-96231b3b80d8
 2013-08-23 20:21:34 +00:00
Nate Begeman fdea31a463 BUILD_VECTOR was missing out on some prime opportunities to use SSE 4.1 inserts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99423 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-03-24 20:49:50 +00:00
Dan Gohman 36a0947820 Eliminate more uses of llvm-as and llvm-dis. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81290 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-08 23:54:48 +00:00
Evan Cheng 687bcb2be0 Add nounwind. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50837 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-07 22:59:08 +00:00
Tanya Lattner 33eefffb2b Remove llvm-upgrade and update tests. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47432 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-02-21 07:42:26 +00:00
Dan Gohman 28beeeac4d Convert tests using "| wc -l | grep ..." to use the count script. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41097 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-08-15 13:36:28 +00:00
Reid Spencer 69ccadd753 Use the llvm-upgrade program to upgrade llvm assembly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32115 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-02 04:23:10 +00:00
Evan Cheng 6a11abca5e Add a BUILD_VECTOR with unpack and interleave testcase. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27121 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-25 09:48:14 +00:00