[all-commits] [llvm/llvm-project] 535468: [flang] Better folding warning due to hidden conve...

[Peter Klausler via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 5354681c6d294333d8c083541d6d94601d35fb6e
      https://github.com/llvm/llvm-project/commit/5354681c6d294333d8c083541d6d94601d35fb6e
  Author: Peter Klausler <pklausler at nvidia.com>
  Date:   2025-10-31 (Fri, 31 Oct 2025)

  Changed paths:
    M flang/include/flang/Evaluate/common.h
    M flang/lib/Evaluate/common.cpp
    M flang/lib/Evaluate/fold-implementation.h
    M flang/lib/Evaluate/host.cpp
    M flang/lib/Evaluate/intrinsics-library.cpp
    M flang/lib/Semantics/expression.cpp
    A flang/test/Evaluate/folding33.f90

  Log Message:
  -----------
  [flang] Better folding warning due to hidden conversion (#165430)

When folding intrinsic function calls for types like REAL(2) that don't
have host math library support, we convert them to a type that has
greater range and precision, call a host math library routine that does
exist, and convert the result back to the original result type. The
folding of this second conversion can elicit floating-point warnings
(usually overflow) that are somewhat unclear to the user. Add support
for adding contextual information to these warnings.



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