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emit-rtl.c (operand_subword): Rework slightly to avoid bogus warning from previous change.

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8
        * emit-rtl.c (operand_subword): Rework slightly to avoid
        bogus warning from previous change.

From-SVN: r19219
This commit is contained in:
Jeff Law 1998-04-14 18:26:35 -06:00
parent fcb7cb6c0f
commit b15fd0927e
1 changed files with 6 additions and 5 deletions
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11
gcc/emit-rtl.c
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@ -1091,6 +1091,7 @@ operand_subword (op, i, validate_address, mode)
{
HOST_WIDE_INT val;
int size_ratio = HOST_BITS_PER_WIDE_INT / BITS_PER_WORD;
int bits_per_word = BITS_PER_WORD;
if (mode == VOIDmode)
mode = GET_MODE (op);
@ -1339,9 +1340,9 @@ operand_subword (op, i, validate_address, mode)
bit are all one. So we get either a reasonable negative value or a
reasonable unsigned value for this mode. */
if (BITS_PER_WORD < HOST_BITS_PER_WIDE_INT
&& ((val & ((HOST_WIDE_INT) (-1) << (BITS_PER_WORD - 1)))
!= ((HOST_WIDE_INT) (-1) << (BITS_PER_WORD - 1))))
val &= ((HOST_WIDE_INT) 1 << BITS_PER_WORD) - 1;
&& ((val & ((HOST_WIDE_INT) (-1) << (bits_per_word - 1)))
!= ((HOST_WIDE_INT) (-1) << (bits_per_word - 1))))
val &= ((HOST_WIDE_INT) 1 << bits_per_word) - 1;
/* If this would be an entire word for the target, but is not for
the host, then sign-extend on the host so that the number will look
@ -1353,8 +1354,8 @@ operand_subword (op, i, validate_address, mode)
The later confuses the sparc backend. */
if (BITS_PER_WORD < HOST_BITS_PER_WIDE_INT
&& (val & ((HOST_WIDE_INT) 1 << (BITS_PER_WORD - 1))))
val |= ((HOST_WIDE_INT) (-1) << BITS_PER_WORD);
&& (val & ((HOST_WIDE_INT) 1 << (bits_per_word - 1))))
val |= ((HOST_WIDE_INT) (-1) << bits_per_word);
return GEN_INT (val);
}