[all-commits] [llvm/llvm-project] c9ca76: [mlir][shape] Fix crash when shape.lib array refer...

[Mehdi Amini via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c9ca768c88cc2bec4240b8710e6d173e7be278e4
      https://github.com/llvm/llvm-project/commit/c9ca768c88cc2bec4240b8710e6d173e7be278e4
  Author: Mehdi Amini <joker.eph at gmail.com>
  Date:   2026-03-04 (Wed, 04 Mar 2026)

  Changed paths:
    M mlir/lib/Dialect/Shape/IR/Shape.cpp
    M mlir/test/Dialect/Shape/invalid.mlir

  Log Message:
  -----------
  [mlir][shape] Fix crash when shape.lib array references undefined symbol (#184613)

In verifyOperationAttribute(), the single-symbol path for shape.lib used
SymbolTable::lookupSymbolIn() followed by an explicit null check. The
array path at line 196-197 used dyn_cast<FunctionLibraryOp>() directly
on the lookup result, which asserts when the symbol is not found (null
pointer).

Fix: use dyn_cast_or_null<> instead of dyn_cast<> so that a missing
symbol falls through to the existing "does not refer to
FunctionLibraryOp" error diagnostic instead of asserting.

Fixes #159653



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