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(set_nonzero_bits_and_sign_copies, nonzero_bits): Fix errors in 

SHORT_IMMEDIATES_SIGN_EXTEND code.

From-SVN: r6315
This commit is contained in:
Richard Kenner 1993-12-25 09:28:45 -05:00
parent 14d4a67a32
commit 9e69be8c65
1 changed files with 5 additions and 7 deletions
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12
gcc/combine.c
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@ -728,7 +728,7 @@ set_nonzero_bits_and_sign_copies (x, set)
&& INTVAL (src) > 0
&& 0 != (INTVAL (src)
& ((HOST_WIDE_INT) 1
<< GET_MODE_BITSIZE (GET_MODE (x)))))
<< (GET_MODE_BITSIZE (GET_MODE (x)) - 1))))
src = GEN_INT (INTVAL (src)
| ((HOST_WIDE_INT) (-1)
<< GET_MODE_BITSIZE (GET_MODE (x))));
@ -6559,7 +6559,7 @@ nonzero_bits (x, mode)
&& INTVAL (tem) > 0
&& 0 != (INTVAL (tem)
& ((HOST_WIDE_INT) 1
<< GET_MODE_BITSIZE (GET_MODE (x)))))
<< (GET_MODE_BITSIZE (GET_MODE (x)) - 1))))
tem = GEN_INT (INTVAL (tem)
| ((HOST_WIDE_INT) (-1)
<< GET_MODE_BITSIZE (GET_MODE (x))));
@ -6574,11 +6574,9 @@ nonzero_bits (x, mode)
case CONST_INT:
#ifdef SHORT_IMMEDIATES_SIGN_EXTEND
/* If X is negative in MODE, sign-extend the value. */
if (INTVAL (x) > 0
&& 0 != (INTVAL (x)
& ((HOST_WIDE_INT) 1 << GET_MODE_BITSIZE (GET_MODE (x)))))
return (INTVAL (x)
| ((HOST_WIDE_INT) (-1) << GET_MODE_BITSIZE (GET_MODE (x))));
if (INTVAL (x) > 0 && mode_width < BITS_PER_WORD
&& 0 != (INTVAL (x) & ((HOST_WIDE_INT) 1 << (mode_width - 1))))
return (INTVAL (x) | ((HOST_WIDE_INT) (-1) << mode_width));
#endif
return INTVAL (x);