[PATCH] D25374: [DAGCombiner] Update most ADD combines to support general vector combines

[Simon Pilgrim via llvm-commits]

RKSimon updated this revision to Diff 74050.
RKSimon added a comment.

Updated isNonOpaqueConstantOrConstantVector to isNonOpaqueConstantOrNonOpaqueConstantVector to check that no vector elements are opaque constants. Also added isConstantOrConstantVector helper that doesn't care about opaque. Both of these allow undef vector elements.

Updated the helpers to not allow implicit truncation in build vectors - this will be necessary for the reuse of these helpers in other combines (e.g. SUB and MUL). This isn't necessary for the isNullConstantOrNullSplatConstant case.


Repository:
  rL LLVM

https://reviews.llvm.org/D25374

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  test/CodeGen/X86/combine-add.ll

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