re PR middle-end/44203 (New prefetch test failures)
2010-05-25 Christian Borntraeger <borntraeger@de.ibm.com> PR 44203 * tree-ssa-loop-prefetch.c: Fix logic for step calculation to match the original (and intended) behaviour before r159557. This changeset changed a=a+b*c to a=(a+b)*b which was obviously wrong in two ways. From-SVN: r159816
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2010-05-25 Christian Borntraeger <borntraeger@de.ibm.com>
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PR 44203
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* tree-ssa-loop-prefetch.c: Fix logic for step calculation to
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match the original (and intended) behaviour before r159557. This
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changeset changed a=a+b*c to a=(a+b)*b which was obviously wrong
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in two ways.
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2010-05-25 Richard Guenther <rguenther@suse.de>
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* doc/invoke.texi: Document -Ofast.
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@ -423,25 +423,24 @@ idx_analyze_ref (tree base, tree *index, void *data)
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ibase = build_int_cst (TREE_TYPE (ibase), 0);
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}
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if (*ar_data->step == NULL_TREE)
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*ar_data->step = step;
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else
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*ar_data->step = fold_build2 (PLUS_EXPR, sizetype,
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fold_convert (sizetype, *ar_data->step),
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fold_convert (sizetype, step));
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if (TREE_CODE (base) == ARRAY_REF)
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{
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stepsize = array_ref_element_size (base);
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if (!cst_and_fits_in_hwi (stepsize))
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return false;
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imult = int_cst_value (stepsize);
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*ar_data->step = fold_build2 (MULT_EXPR, sizetype,
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fold_convert (sizetype, *ar_data->step),
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fold_convert (sizetype, step));
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step = fold_build2 (MULT_EXPR, sizetype,
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fold_convert (sizetype, step),
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fold_convert (sizetype, stepsize));
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idelta *= imult;
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}
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if (*ar_data->step == NULL_TREE)
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*ar_data->step = step;
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else
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*ar_data->step = fold_build2 (PLUS_EXPR, sizetype,
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fold_convert (sizetype, *ar_data->step),
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fold_convert (sizetype, step));
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*ar_data->delta += idelta;
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*index = ibase;
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