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fold-const.c (fold_truthop): Make the field reference unsigned when converting a single bit compare.

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        * fold-const.c (fold_truthop): Make the field reference unsigned
        when converting a single bit compare.

From-SVN: r27202
This commit is contained in:
Andreas Schwab 1999-05-26 20:33:58 -06:00 committed by Jeff Law
parent 8eba681fa5
commit 2bd21a021e
1 changed files with 5 additions and 7 deletions
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12
gcc/fold-const.c
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@ -3806,11 +3806,10 @@ fold_truthop (code, truth_type, lhs, rhs)
{
if (l_const && integer_zerop (l_const) && integer_pow2p (ll_mask))
{
/* Do not sign extend the constant here. The left operand
is either always unsigned or there is a BIT_AND_EXPR that
masks out the extension bits. */
if (! (ll_unsignedp || ll_and_mask != 0))
abort ();
/* Make the left operand unsigned, since we are only interested
in the value of one bit. Otherwise we are doing the wrong
thing below. */
ll_unsignedp = 1;
l_const = ll_mask;
}
else
@ -3822,8 +3821,7 @@ fold_truthop (code, truth_type, lhs, rhs)
{
if (r_const && integer_zerop (r_const) && integer_pow2p (rl_mask))
{
if (! (rl_unsignedp || rl_and_mask != 0))
abort ();
rl_unsignedp = 1;
r_const = rl_mask;
}
else