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[Bug c/51730] [4.7 Regression] autoconf 2.60 through 2.67 stdbool.h check fails with GCC 4.7
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 02 Jan 2012 14:15:39 +0000
- Subject: [Bug c/51730] [4.7 Regression] autoconf 2.60 through 2.67 stdbool.h check fails with GCC 4.7
- Auto-submitted: auto-generated
- References: <bug-51730-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51730
--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-01-02 14:15:39 UTC ---
Like
Index: gcc/fold-const.c
===================================================================
--- gcc/fold-const.c (revision 182784)
+++ gcc/fold-const.c (working copy)
@@ -8886,6 +8886,13 @@ fold_comparison (location_t loc, enum tr
indirect_base0 = true;
}
offset0 = TREE_OPERAND (arg0, 1);
+ if (host_integerp (offset0, 1)
+ && (TREE_INT_CST_LOW (offset0)
+ & ((unsigned HOST_WIDE_INT)-1 << (HOST_BITS_PER_WIDE_INT -
exact_log2 (BITS_PER_UNIT)))) == 0)
+ {
+ bitpos0 = TREE_INT_CST_LOW (offset0) * BITS_PER_UNIT;
+ offset0 = NULL_TREE;
+ }
}
base1 = arg1;
@@ -8909,6 +8916,13 @@ fold_comparison (location_t loc, enum tr
indirect_base1 = true;
}
offset1 = TREE_OPERAND (arg1, 1);
+ if (host_integerp (offset1, 1)
+ && (TREE_INT_CST_LOW (offset1)
+ & ((unsigned HOST_WIDE_INT)-1 << (HOST_BITS_PER_WIDE_INT -
exact_log2 (BITS_PER_UNIT)))) == 0)
+ {
+ bitpos1 = TREE_INT_CST_LOW (offset1) * BITS_PER_UNIT;
+ offset1 = NULL_TREE;
+ }
}
/* A local variable can never be pointed to by
to be beautified ...