re PR tree-optimization/34138 (verify_ssa failed (found real variable when subvariables should have appeared))
2007-12-05 Richard Guenther <rguenther@suse.de> PR tree-optimization/34138 * tree-ssa-forwprop.c (tree_ssa_forward_propagate_single_use_vars): Do not forward propagate addresses if that changes volatileness of the pointed-to type. * gcc.c-torture/compile/pr34138.c: New testcase. From-SVN: r130632
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2007-12-05 Richard Guenther <rguenther@suse.de>
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PR tree-optimization/34138
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* tree-ssa-forwprop.c (tree_ssa_forward_propagate_single_use_vars):
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Do not forward propagate addresses if that changes volatileness of
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the pointed-to type.
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2007-12-05 Uros Bizjak <ubizjak@gmail.com>
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PR target/34312
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2007-12-05 Richard Guenther <rguenther@suse.de>
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PR tree-optimization/34138
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* gcc.c-torture/compile/pr34138.c: New testcase.
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2007-12-05 Jakub Jelinek <jakub@redhat.com>
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PR debug/33739
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@ -0,0 +1,21 @@
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extern void free (void *__ptr);
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struct shparam
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{
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char **p;
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int foo;
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};
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static struct shparam shellparam;
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inline void freeparam (volatile struct shparam *param, char **ap)
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{
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free ((void *) (*ap));
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free ((void *) (param->p));
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}
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void dotcmd (char **p)
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{
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freeparam (&shellparam, p);
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}
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void evaltree (void)
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{
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void (*evalfn) (char **);
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evalfn = dotcmd;
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}
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@ -956,12 +956,15 @@ tree_ssa_forward_propagate_single_use_vars (void)
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}
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if (TREE_CODE (rhs) == ADDR_EXPR
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/* We can also disregard changes in CV qualifiers for
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/* We can also disregard changes in const qualifiers for
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the dereferenced value. */
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|| ((TREE_CODE (rhs) == NOP_EXPR
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|| TREE_CODE (rhs) == CONVERT_EXPR)
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&& TREE_CODE (TREE_OPERAND (rhs, 0)) == ADDR_EXPR
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&& POINTER_TYPE_P (TREE_TYPE (rhs))
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/* But do not propagate changes in volatileness. */
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&& (TYPE_VOLATILE (TREE_TYPE (TREE_TYPE (rhs)))
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== TYPE_VOLATILE (TREE_TYPE (TREE_TYPE (TREE_OPERAND (rhs, 0)))))
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&& types_compatible_p (TREE_TYPE (TREE_TYPE (TREE_OPERAND (rhs, 0))),
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TREE_TYPE (TREE_TYPE (rhs)))))
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{
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