re PR tree-optimization/53550 (ICE with -O{1,2,3} -fprefetch-loop-arrays in build2_stat, at tree.c:3803)
PR tree-optimization/53550 * tree-ssa-loop-niter.c (number_of_iterations_cond): If type is POINTER_TYPE_P, use sizetype as step type instead of type. * gcc.dg/pr53550.c: New test. From-SVN: r188169
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2012-06-04 Jakub Jelinek <jakub@redhat.com>
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PR tree-optimization/53550
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* tree-ssa-loop-niter.c (number_of_iterations_cond): If type
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is POINTER_TYPE_P, use sizetype as step type instead of type.
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2012-06-04 Richard Guenther <rguenther@suse.de>
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* tree-data-ref.c (have_similar_memory_accesses_1): Remove.
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@ -1,3 +1,8 @@
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2012-06-04 Jakub Jelinek <jakub@redhat.com>
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PR tree-optimization/53550
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* gcc.dg/pr53550.c: New test.
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2012-06-04 Richard Guenther <rguenther@suse.de>
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* gcc.dg/tree-ssa/ldist-11.c: Enable -ftree-loop-distribute-patterns.
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/* PR tree-optimization/53550 */
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/* { dg-do compile } */
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/* { dg-options "-O2 -fprefetch-loop-arrays -w" } */
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int *
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foo (int *x)
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{
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int *a = x + 10, *b = x, *c = a;
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while (b != c)
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*--c = *b++;
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return x;
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}
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@ -1275,13 +1275,14 @@ number_of_iterations_cond (struct loop *loop,
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practice, but it is simple enough to manage. */
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if (!integer_zerop (iv0->step) && !integer_zerop (iv1->step))
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{
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tree step_type = POINTER_TYPE_P (type) ? sizetype : type;
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if (code != NE_EXPR)
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return false;
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iv0->step = fold_binary_to_constant (MINUS_EXPR, type,
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iv0->step = fold_binary_to_constant (MINUS_EXPR, step_type,
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iv0->step, iv1->step);
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iv0->no_overflow = false;
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iv1->step = build_int_cst (type, 0);
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iv1->step = build_int_cst (step_type, 0);
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iv1->no_overflow = true;
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}
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