Serguei Katkov 4275eb1331 Re-land [Codegen/Statepoint] Allow usage of registers for non gc deopt values.
The change introduces the usage of physical registers for non-gc deopt values.
This require runtime support to know how to take a value from register.
By default usage is off and can be switched on by option.

The change also introduces additional fix-up patch which forces the spilling
of caller saved registers (clobbered after the call) and re-writes statepoint
to use spill slots instead of caller saved registers.

Reviewers: reames, danstrushin
Reviewed By: dantrushin
Subscribers: mgorny, hiraditya, mgrang, llvm-commits
Differential Revision: https://reviews.llvm.org/D77797
2020-04-10 10:13:39 +07:00
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