re PR debug/32563 (ICE on pointer arithmetic)

2007-08-22  Richard Guenther  <rguenther@suse.de>

	PR middle-end/32563
	* tree.c (host_integerp): Treat sizetype as signed as it is
	sign-extended.

	* g++.dg/torture/pr32563.C: New testcase.

        Backport from mainline:
        2007-05-30  Richard Guenther  <rguenther@suse.de>

        * g++.dg/dg.exp: Prune torture/.
        * g++.dg/torture/dg-torture.exp: New testsuite.

From-SVN: r127689

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index daead9fde743430ca79c321f187c38a20322c2cd..437088c7d10cc3e492de4f41ce81ece1187958d5 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2007-08-22  Richard Guenther  <rguenther@suse.de>
+
+       PR middle-end/32563
+       * tree.c (host_integerp): Treat sizetype as signed as it is
+       sign-extended.
+
 2007-08-20  Adam Nemet  <anemet@caviumnetworks.com>
 
        * config/mips/predicates.md (const_call_insn_operand): Invoke

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index b78ef3f76185404a1311d3a2d1cc7bed48fcf440..5a78dd2fb16697dfe560c7d64ae7a94f803ed892 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,14 @@
+2007-08-22  Richard Guenther  <rguenther@suse.de>
+
+       PR middle-end/32563
+       * g++.dg/torture/pr32563.C: New testcase.
+
+       Backport from mainline:
+       2007-05-30  Richard Guenther  <rguenther@suse.de>
+
+       * g++.dg/dg.exp: Prune torture/.
+       * g++.dg/torture/dg-torture.exp: New testsuite.
+
 2007-08-20  Jakub Jelinek  <jakub@redhat.com>
 
        PR c++/32992

diff --git a/gcc/testsuite/g++.dg/dg.exp b/gcc/testsuite/g++.dg/dg.exp
index 5ecb161bee7d7f507136c3334c96596f6bbb4861..b0fa7cfcc93f72ba1ed7ed666fc4c72852df939d 100644 (file)
--- a/gcc/testsuite/g++.dg/dg.exp
+++ b/gcc/testsuite/g++.dg/dg.exp
@@ -41,6 +41,7 @@ set tests [prune $tests $srcdir/$subdir/special/*]
 set tests [prune $tests $srcdir/$subdir/tls/*]
 set tests [prune $tests $srcdir/$subdir/vect/*]
 set tests [prune $tests $srcdir/$subdir/gomp/*]
+set tests [prune $tests $srcdir/$subdir/torture/*]
 
 # Main loop.
 dg-runtest $tests "" $DEFAULT_CXXFLAGS

diff --git a/gcc/testsuite/g++.dg/torture/dg-torture.exp b/gcc/testsuite/g++.dg/torture/dg-torture.exp
new file mode 100644 (file)
index 0000000..bcb8200
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/dg-torture.exp
@@ -0,0 +1,7 @@
+# This harness is for tests that should be run at all optimisation levels.
+
+load_lib g++-dg.exp
+
+dg-init
+gcc-dg-runtest [lsort [glob $srcdir/$subdir/*.C]] ""
+dg-finish

diff --git a/gcc/testsuite/g++.dg/torture/pr32563.C b/gcc/testsuite/g++.dg/torture/pr32563.C
new file mode 100644 (file)
index 0000000..d536b3f
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/pr32563.C
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+
+struct A
+{
+  char c[1];
+} a;
+
+const __SIZE_TYPE__ i = (__SIZE_TYPE__)&a.c[0] - 1;

diff --git a/gcc/tree.c b/gcc/tree.c
index 90b860ce1afb3c451caa11b9a73beb2cab5d60fa..a4f0616323bcea1ee82ca9be9463ed7a41dc1858 100644 (file)
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -4540,7 +4540,8 @@ host_integerp (tree t, int pos)
               && (HOST_WIDE_INT) TREE_INT_CST_LOW (t) >= 0)
              || (! pos && TREE_INT_CST_HIGH (t) == -1
                  && (HOST_WIDE_INT) TREE_INT_CST_LOW (t) < 0
-                 && !TYPE_UNSIGNED (TREE_TYPE (t)))
+                 && (!TYPE_UNSIGNED (TREE_TYPE (t))
+                     || TYPE_IS_SIZETYPE (TREE_TYPE (t))))
              || (pos && TREE_INT_CST_HIGH (t) == 0)));
 }