re PR target/14478 ([3.3 only] rs6000 geu/ltu patterns generate incorrect code)
PR target/14478 * config/rs6000/rs6000.c (reg_or_neg_short_operand): Don't allow zero. From-SVN: r82315
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2004-05-27 Alan Modra <amodra@bigpond.net.au>
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PR target/14478
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* config/rs6000/rs6000.c (reg_or_neg_short_operand): Don't allow zero.
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2004-05-27 Josef Zlomek <zlomekj@suse.cz>
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PR middle-end/14084
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@ -1407,13 +1407,16 @@ reg_or_short_operand (rtx op, enum machine_mode mode)
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}
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/* Similar, except check if the negation of the constant would be
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valid for a D-field. */
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valid for a D-field. Don't allow a constant zero, since all the
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patterns that call this predicate use "addic r1,r2,-constant" on
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a constant value to set a carry when r2 is greater or equal to
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"constant". That doesn't work for zero. */
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int
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reg_or_neg_short_operand (rtx op, enum machine_mode mode)
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{
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if (GET_CODE (op) == CONST_INT)
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return CONST_OK_FOR_LETTER_P (INTVAL (op), 'P');
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return CONST_OK_FOR_LETTER_P (INTVAL (op), 'P') && INTVAL (op) != 0;
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return gpc_reg_operand (op, mode);
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}
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