Eric Wang 5b26f4f042 Reland "[MLGO] ML Regalloc Priority Advisor"
This relands commit 8f4f26ba5bd04f7b335836021e5e63b4236c0305, which was reverted in 91c96a806cae58539e40c9e443a08bde91ccc91e because of Buildbot failures. The previous model test is not compatible with tflite. e.g. https://lab.llvm.org/buildbot/#/builders/6/builds/14041

Differential Revision: https://reviews.llvm.org/D133616
2022-09-30 16:27:26 -05:00
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