Tim Northover 5745b6ac3b ARM: use target-specific SUBS node when combining cmp with cmov. ...

This has two positive effects. First, using a custom node prevents
recombination leading to an infinite loop since the output DAG is notionally a
little more complex than the input one. Using a flag-setting instruction also
allows the subtraction to be folded with the related comparison more easily.

https://reviews.llvm.org/D53190

llvm-svn: 348122

2018-12-03 11:16:21 +00:00

3.3 KiB

Raw Blame History

View Raw