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stor-layout.c (set_sizetype): Set TYPE_MAX_VALUE properly for sizetype when sizetype is unsigned.

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* stor-layout.c (set_sizetype): Set TYPE_MAX_VALUE properly
        for sizetype when sizetype is unsigned.

From-SVN: r111170
This commit is contained in:
Jeff Law 2006-02-16 17:18:03 -07:00 • committed by Jeff Law
parent b18b991a8c
commit 7f18f91710
2 changed files with 24 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2006-02-16 Jeff Law <law@redhat.com>
* stor-layout.c (set_sizetype): Set TYPE_MAX_VALUE properly
for sizetype when sizetype is unsigned.
2006-02-16 Denis Nagorny <denis_nagorny@linux.intel.com>
PR rtl-optimization/25603

19
gcc/stor-layout.c
View file

@ -2018,6 +2018,25 @@ set_sizetype (tree type)
ssizetype = sizetype;
sbitsizetype = bitsizetype;
}
/* If SIZETYPE is unsigned, we need to fix TYPE_MAX_VALUE so that
it is sign extended in a way consistent with force_fit_type. */
if (TYPE_UNSIGNED (type))
{
tree orig_max, new_max;
orig_max = TYPE_MAX_VALUE (sizetype);
/* Build a new node with the same values, but a different type. */
new_max = build_int_cst_wide (sizetype,
TREE_INT_CST_LOW (orig_max),
TREE_INT_CST_HIGH (orig_max));
/* Now sign extend it using force_fit_type to ensure
consistency. */
new_max = force_fit_type (new_max, 0, 0, 0);
TYPE_MAX_VALUE (sizetype) = new_max;
}
}
/* TYPE is an integral type, i.e., an INTEGRAL_TYPE, ENUMERAL_TYPE