Mike Klein 813e8cc762 add a global may-we-JIT flag ... The most interesting part of the CL is that we recheck gSkVMAllowJIT in Program::eval() even though we've already checked it in the constructor. This allows Viewer to toggle the JIT on and off without having to worry about program caching. This is not something that you'd expect to come up in practice if a program just sets gSkVMAllowJIT at the start of main(); for real clients I think we can avoid all this with a simple SkGraphics::allowJIT() that only lets clients opt-in, never back out. I toyed with making '!' rotate through a tristate in Viewer, until I realized that these really are independent bits: GMs like threshold_rt that use both ordinary effects and SkVM-only effects demonstrate different behavior and performance in all four modes. So '!' continues to toggle SkVMBlitter, and now '@' toggles the JIT. I've left the test program default settings unchanged, with the JIT enabled unless --nojit is passed. Where we previously simplified the command line by conflating --dylib with --skvm, we now conflate --dylib with --jit. Change-Id: If86bf524c657298c0846bcd33c706e3c3f91e788 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/308184 Reviewed-by: Mike Reed <reed@google.com> Commit-Queue: Mike Klein <mtklein@google.com>		2020-08-05 16:35:45 +00:00
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fm_bot	Inclusive language	2020-07-24 13:33:53 +00:00
fm.cpp	add a global may-we-JIT flag	2020-08-05 16:35:45 +00:00