[llvm-commits] [llvm] [patch] Porting Hexagon MI Scheduler to new API

Sergei Larin slarin at codeaurora.org
Tue Aug 21 08:18:39 PDT 2012

Please review initial port of the Hexagon Pre-RA MI scheduler to the new
converging scheduling framework.




-          This is a first port, so it largely reuses reference
implementation. It will diverge in the future.

-          It does not touch any platform independent files.

-          It does incorporate DFA model, and the new reg pressure tracking
but does not use other heuristics from ResourcePriorityQueue. This will

-          It does affect two Hexagon .ll tests that are dependent on order
of instructions produced. For those two cases I turn off scheduling.

-          It unnecessarily duplicates MachineSchedStrategy that needs to be
eventually exposed to ScheduleDAGInstrs.h

-          Other than that it passes the test make check-all without
additional failures.





Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum.


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