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combine.c (make_extraction): Avoid reference outside object.

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2005-08-26  Ian Lance Taylor  <ian@airs.com>

        * combine.c (make_extraction): Avoid reference outside object.

From-SVN: r103537
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Ian Lance Taylor 2005-08-26 21:52:23 +00:00 committed by Dale Johannesen
parent 277d42e27f
commit 8f34bde689
2 changed files with 9 additions and 3 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2005-08-26 Ian Lance Taylor <ian@airs.com>
* combine.c (make_extraction): Avoid reference outside object.
2005-08-26 J"orn Rennecke <joern.rennecke@st.com>
* stor-layout.c (finalize_type_size): Restore behaviour for

8
gcc/combine.c
View File

@ -6484,11 +6484,13 @@ make_extraction (enum machine_mode mode, rtx inner, HOST_WIDE_INT pos,
&& GET_MODE_SIZE (inner_mode) < GET_MODE_SIZE (is_mode))
offset -= GET_MODE_SIZE (is_mode) - GET_MODE_SIZE (inner_mode);
/* If this is a constant position, we can move to the desired byte. */
/* If this is a constant position, we can move to the desired byte.
Be careful not to go beyond the original object. */
if (pos_rtx == 0)
{
offset += pos / BITS_PER_UNIT;
pos %= GET_MODE_BITSIZE (wanted_inner_mode);
enum machine_mode bfmode = smallest_mode_for_size (len, MODE_INT);
offset += pos / GET_MODE_BITSIZE (bfmode);
pos %= GET_MODE_BITSIZE (bfmode);
}
if (BYTES_BIG_ENDIAN != BITS_BIG_ENDIAN