Compiler constant handling rework
In preparation for de-optimization, reworked the constant
handling mechanism. Also took advantage of knowledge of
constant operands (particularly for long operations).
Significant performance improvements for Mandelbrot
(~60 seconds to ~34 seconds). Minor improvements in other
benchmarks.
The new constant handling breaks two of the existing
optimization passes: "Skip Large Method" and "Load/Store
Elimization."
I don't intend to update the large method optimization
because it will be superceeded by the upcoming interpreter/
fingerprinting mechanism. Leaving the code in place for
now in order to compare compile-time improvements with
fingerprinting/interpret. All related code will be deleted
when that is complete.
The load/store elimination pass needs some rework to handle
uses of multiple-register loads and stores. It will be
updated & restored in a future CL.
Change-Id: Ia979abaf51b8ae81bbb0428031cbcea854625fac
27 files changed
