[all-commits] [llvm/llvm-project] 1d92b6: DAG: Correct chain management for frexp libcalls

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1d92b68ead0c57a8218c95acd39a2737016ea0ad
      https://github.com/llvm/llvm-project/commit/1d92b68ead0c57a8218c95acd39a2737016ea0ad
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2023-07-10 (Mon, 10 Jul 2023)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
    M llvm/test/CodeGen/X86/llvm.frexp.f80.ll
    M llvm/test/CodeGen/X86/llvm.frexp.ll

  Log Message:
  -----------
  DAG: Correct chain management for frexp libcalls

We need to replace the other uses of the call chain with the new load
chain.

Fixes not preserving the return def with unused x86_fp80
results. Regression reported here:
https://reviews.llvm.org/rGb15bf305ca3e9ce63aaef7247d32fb3a75174531#1224999