* tree-ssa-loop-ivopts.c (may_be_nonaddressable_p): New function.

	(find_interesting_uses_address): Punt if above function returns true.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@114851 138bc75d-0d04-0410-961f-82ee72b054a4

3 files changed, 42 insertions, 0 deletions

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 93cb39ebb46..3e9165c4afd 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2006-06-21  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gnat.dg/loop_unchecked_conversion.ad[bs]: New test.
+
 2006-06-21  Joseph Myers  <joseph@codesourcery.com>
 
 	* gcc.c-torture/execute/complex-7.c: New.
diff --git a/gcc/testsuite/gnat.dg/loop_unchecked_conversion.adb b/gcc/testsuite/gnat.dg/loop_unchecked_conversion.adb
new file mode 100644
index 00000000000..e87c415c548
--- /dev/null
+++ b/gcc/testsuite/gnat.dg/loop_unchecked_conversion.adb
@@ -0,0 +1,33 @@
+-- { dg-do compile }
+-- { dg-options "-gnatws -O" }
+
+with Unchecked_Conversion;
+
+package body loop_unchecked_conversion is
+
+   type Byte is mod 2**8;
+
+   type List is array (Natural range <>) of Byte;
+
+   subtype Integer_List is List (1 .. 4);
+
+   function Integer_Down is new
+     Unchecked_Conversion (Source => Integer, Target => Integer_List);
+
+   type Storage (Size : Integer) is
+      record
+         Data : List (1 .. Size);
+      end record;
+
+   type Storage_Pointer is access Storage;
+
+   The_Data_Storage : Storage_Pointer;
+
+   procedure slice is
+   begin
+      for I in 0 .. 1 loop
+         The_Data_Storage.Data (I+1 .. I+4) := Integer_Down (I);
+      end loop;
+   end;
+
+end loop_unchecked_conversion;
diff --git a/gcc/testsuite/gnat.dg/loop_unchecked_conversion.ads b/gcc/testsuite/gnat.dg/loop_unchecked_conversion.ads
new file mode 100644
index 00000000000..5ce43e5524e
--- /dev/null
+++ b/gcc/testsuite/gnat.dg/loop_unchecked_conversion.ads
@@ -0,0 +1,5 @@
+package loop_unchecked_conversion is
+
+   procedure slice;
+
+end loop_unchecked_conversion;