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add a note about how we should implement this FIXME from the legalizer:

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// FIXME: revisit this when we have some kind of mechanism by which targets
    // can decided legality of vector constants, of which there may be very
    // many.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25733 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-01-28 05:40:47 +00:00
parent 8137c9e41d
commit 969097968c
2 changed files with 7 additions and 1 deletions
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2
lib/Target/PowerPC/PPCSubtarget.cpp
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@ -1,4 +1,4 @@
//===- PowerPCSubtarget.cpp - PPC Subtarget Information ---------*- C++ -*-===//
//===- PowerPCSubtarget.cpp - PPC Subtarget Information -------------------===//
//
// The LLVM Compiler Infrastructure
//

6
lib/Target/PowerPC/README.txt
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@ -396,3 +396,9 @@ of the GOT on targets with one).
Generate lwbrx and other byteswapping load/store instructions when reasonable.
===-------------------------------------------------------------------------===
Implement TargetConstantVec, and set up PPC to custom lower ConstantVec into
TargetConstantVec's if it's one of the many forms that are algorithmically
computable using the spiffy altivec instructions.