Sam Parker 53000a74a5 [ARM] Add missing patterns for DSP muls ...

Using a PatLeaf for sext_16_node allowed matching smulbb and smlabb
instructions once the operands had been sign extended. But we also
need to use sext_inreg operands along with sext_16_node to catch a
few more cases that enable use to remove the unnecessary sxth.

Differential Revision: https://reviews.llvm.org/D55992

llvm-svn: 350613

2019-01-08 10:12:36 +00:00

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