[PATCH] D14683: [DAGCombiner] Vector constant folding for comparisons

[Simon Pilgrim via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: qcolombet, majnemer, andreadb, spatel.
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This patch adds support for vector constant folding of integer/float comparisons.

This requires FoldConstantVectorArithmetic to support scalar constant operands (in this case ISD::CONDCASE). In future we should be able to support other scalar constant types as necessary (and possibly start calling FoldConstantVectorArithmetic for all node creations).

Repository:
  rL LLVM

http://reviews.llvm.org/D14683

Files:
  lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  test/CodeGen/X86/2011-10-21-widen-cmp.ll
  test/CodeGen/X86/2011-20-21-zext-ui2fp.ll
  test/CodeGen/X86/vec_minmax_sint.ll
  test/CodeGen/X86/vec_minmax_uint.ll

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