• Raymond Toy's avatar
    Complex array accessors are not foldable · e9a598e5
    Raymond Toy authored
    Fixes #61 and #62.
    
    The `ARRAY-HAS-FILL-POINTER-P` and `ARRAY-DISPLACEMENT` functions are
    declared inline and the compiler tries to constant-fold these inlined
    functions operating on simple arrays.
    
    Thus don't allow the compiler to constant-fold calls to
    `%ARRAY-FILL-POINTER-P`.  This is normally protected by a call to
    `ARRAY-HEADER-P`, but when it's inlined, the compiler tries to
    constant-fold `%ARRAY-FILL-POINTER-P` on an array without such a slot.
    
    Likewise `ARRAY-DISPLACEMENT` calls `%ARRAY-DISPLACED-P`,
    `%ARRAY-DATA-VECTOR`, and `%ARRAY-DISPLACEMENT`, and the calls are
    protected by `ARRAY-HEADER-P`. So don't constant-fold these either.
    
    Maybe we could also make CONSTANT-FOLD-CALL be smarter about this?
    
    * src/compiler/generic/objdef.lisp
      * Remove flushable from these ref-trans methods.
    * src/general-info/release-21d.md
      * Update
    * tests/issues.lisp
      * Add tests from the bug reports.
    e9a598e5
release-21d.md 2.39 KB