all-constant peepholes
This adds a bunch of tests for ops that can all be evaluated directly in
skvm::Builder. You can see the sort of effect this has by looking at
the diffs for SkVMTest.expected... lots of `v3 = sub_f32 v2 v2`
transformed to `v3 = splat 0 (0)` and that sort of thing.
My favorite part is handling many assert_true() calls at compile time!
While the old inter-Op code parallels aren't as clear now, these new
early-out tests kind of work like comments explaining each op. I find
that nice. I found it hard to parse so many uses of the word "splat" so
I did go back to isImm() from isSplat(), and added allImm() to test for
and read several immediates all at once.
Some of this is less C++17 than I'd like. :/
Change-Id: Ie8187d5d184195e3c0c92d613508fb708c28302f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/255814
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
3 files changed