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(loop_iterations): Only use REG_EQUAL note value if it

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is constant.

From-SVN: r7648
This commit is contained in:
Jim Wilson 1994-07-02 18:14:43 -07:00
parent 6859741315
commit f0c94be0eb
1 changed files with 5 additions and 1 deletions
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6
gcc/unroll.c
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@ -3160,7 +3160,11 @@ loop_iterations (loop_start, loop_end)
{ {
rtx note = find_reg_note (insn, REG_EQUAL, NULL_RTX); rtx note = find_reg_note (insn, REG_EQUAL, NULL_RTX);
if (note && GET_CODE (XEXP (note, 0)) != EXPR_LIST) /* Only use the REG_EQUAL note if it is a constant.
Other things, divide in particular, will cause
problems later if we use them. */
if (note && GET_CODE (XEXP (note, 0)) != EXPR_LIST
&& CONSTANT_P (XEXP (note, 0)))
comparison_value = XEXP (note, 0); comparison_value = XEXP (note, 0);
} }
break; break;