[all-commits] [llvm/llvm-project] 602566: [SDAG] propagate FMF from target-specific IR intri...

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  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6025663578cd367b6f1bcba3f42076eee4fce7a2
      https://github.com/llvm/llvm-project/commit/6025663578cd367b6f1bcba3f42076eee4fce7a2
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2021-05-19 (Wed, 19 May 2021)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
    M llvm/test/CodeGen/X86/fmf-propagation.ll

  Log Message:
  -----------
  [SDAG] propagate FMF from target-specific IR intrinsics

This is a step towards relying more on node-level FMF rather than function-wide
or target settings.
I think it was just an oversight that we didn't get this path in D87361
or follow-on patches.

The lack of FMF propagation is blocking D90901 from converting tests to IR-level FMF.

We can't do much more than this currently because we also fail to propagate flags
from x86-specific node to generic FMA node. That would be another patch, so the
test just verifies that we can transfer from IR to initial SDAG node.

Differential Revision: https://reviews.llvm.org/D102725