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2000-08-21 Jakub Jelinek <jakub@redhat.com>
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* unroll.c (loop_find_equiv_value): If ret is modified between
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insn and loop_start, ret might not be equivalent to reg.
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--- gcc/unroll.c.jj Fri Aug 18 23:44:09 2000
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+++ gcc/unroll.c Mon Aug 21 17:28:09 2000
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@@ -3550,6 +3550,11 @@ loop_find_equiv_value (loop, reg)
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ret = XEXP (note, 0);
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else
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ret = SET_SRC (set);
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+
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+ /* We cannot do this if it changes between the
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+ assignment and loop start though. */
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+ if (modified_between_p (ret, insn, loop_start))
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+ ret = reg;
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}
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break;
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}
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