Sanjay Patel 8cc4b69873 [DAG] use isConstOrConstSplat in ComputeNumSignBits to optimize SRA
The scalar version of this pattern was noted in:
https://reviews.llvm.org/D25485

and fixed with:
https://reviews.llvm.org/rL284395

More refactoring of the constant/splat helpers is needed and will happen in follow-up patches.

Differential Revision: https://reviews.llvm.org/D25685


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284424 91177308-0d34-0410-b5e6-96231b3b80d8
2016-10-17 20:41:39 +00:00
2016-10-14 19:48:34 +00:00
2016-08-02 13:26:07 +00:00

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