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stor-layout.c (bit_field_mode_iterator::next_mode): Fix signedness. 

gcc/
	* stor-layout.c (bit_field_mode_iterator::next_mode): Fix signedness.

From-SVN: r193680
This commit is contained in:
Richard Sandiford 2012-11-20 22:49:41 +00:00 committed by Richard Sandiford
parent 341e19df23
commit ec593a8fc3
2 changed files with 13 additions and 6 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2012-11-20 Richard Sandiford <rdsandiford@googlemail.com>
* stor-layout.c (bit_field_mode_iterator::next_mode): Fix signedness.
2012-11-20 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/55396

15
gcc/stor-layout.c
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@ -2670,10 +2670,6 @@ bit_field_mode_iterator::next_mode (enum machine_mode *out_mode)
if (unit != GET_MODE_PRECISION (mode_))
continue;
/* Skip modes that are too small. */
if ((bitpos_ % unit) + bitsize_ > unit)
continue;
/* Stop if the mode is too wide to handle efficiently. */
if (unit > MAX_FIXED_MODE_SIZE)
break;
@ -2683,11 +2679,18 @@ bit_field_mode_iterator::next_mode (enum machine_mode *out_mode)
if (count_ > 0 && unit > BITS_PER_WORD)
break;
/* Skip modes that are too small. */
unsigned HOST_WIDE_INT substart = (unsigned HOST_WIDE_INT) bitpos_ % unit;
unsigned HOST_WIDE_INT subend = substart + bitsize_;
if (subend > unit)
continue;
/* Stop if the mode goes outside the bitregion. */
HOST_WIDE_INT start = bitpos_ - (bitpos_ % unit);
HOST_WIDE_INT start = bitpos_ - substart;
if (bitregion_start_ && start < bitregion_start_)
break;
if (start + unit > bitregion_end_ + 1)
HOST_WIDE_INT end = start + unit;
if (end > bitregion_end_ + 1)
break;
/* Stop if the mode requires too much alignment. */