stmt.c (expand_end_case): Index jumptables from zero for suitably small values of minval.
* stmt.c (expand_end_case): Index jumptables from zero for suitably small values of minval. From-SVN: r46478
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@ -1,3 +1,8 @@
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2001-10-24 Roger Sayle <roger@eyesopen.com>
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* stmt.c (expand_end_case): Index jumptables from zero for
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suitably small values of minval.
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2001-10-24 Jakub Jelinek <jakub@redhat.com>
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* stor-layout.c (place_union_field): If any field was aligned with
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13
gcc/stmt.c
13
gcc/stmt.c
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@ -5534,6 +5534,17 @@ expand_end_case (orig_index)
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table_label, default_label))
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{
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index_type = thiscase->data.case_stmt.nominal_type;
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/* Index jumptables from zero for suitable values of
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minval to avoid a subtraction. */
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if (! optimize_size
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&& compare_tree_int (minval, 0) > 0
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&& compare_tree_int (minval, 3) < 0)
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{
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minval = integer_zero_node;
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range = maxval;
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}
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if (! try_tablejump (index_type, index_expr, minval, range,
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table_label, default_label))
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abort ();
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@ -5541,7 +5552,7 @@ expand_end_case (orig_index)
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/* Get table of labels to jump to, in order of case index. */
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ncases = TREE_INT_CST_LOW (range) + 1;
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ncases = tree_low_cst (range, 0) + 1;
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labelvec = (rtx *) alloca (ncases * sizeof (rtx));
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memset ((char *) labelvec, 0, ncases * sizeof (rtx));
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