[PATCH] D75335: [InlineSpiller] Relax re-materialization restriction for statepoint

[Serguei Katkov via Phabricator via llvm-commits]

skatkov created this revision.
skatkov added a reviewer: reames.
Herald added subscribers: hiraditya, qcolombet.
Herald added a project: LLVM.

We should be careful to allow count of re-materialization of operands to be less
then number of physical registers.

STATEPOINT instruction has a variable number of operands and potentially very big.
So re-materialization for all operands is disabled at the moment if restrict-statepoint-remat is true.

The patch relaxes the re-materialization restriction for STATEPOINT instruction allowing it for
fixed operands. Specifically it is about call target.


https://reviews.llvm.org/D75335

Files:
  llvm/lib/CodeGen/InlineSpiller.cpp
  llvm/test/CodeGen/X86/statepoint-live-in-remat.ll

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