re PR rtl-optimization/49169 (ARM: optimisations strip the Thumb/ARM mode bit…

re PR rtl-optimization/49169 (ARM: optimisations strip the Thumb/ARM mode bit off function pointers)

gcc/
2011-07-24  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/49169
	* fold-const.c (get_pointer_modulus_and_residue): Don't rely on
	the alignment of function decls.

gcc/testsuite/
2011-07-24  Michael Hope  <michael.hope@linaro.org>
	    Richard Sandiford  <richard.sandiford@linaro.org>

	PR tree-optimization/49169
	* gcc.dg/torture/pr49169.c: New test.

From-SVN: r175427

gcc/ChangeLog

+2011-06-27  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/49169
+	* fold-const.c (get_pointer_modulus_and_residue): Don't rely on
+	the alignment of function decls.
+
 2011-06-26  Iain Sandoe  <iains@gcc.gnu.org>
 
 	PR target/47997

gcc/fold-const.c

@@ -9216,7 +9216,8 @@ get_pointer_modulus_and_residue (tree expr, unsigned HOST_WIDE_INT *residue,
   *residue = 0;
 
   code = TREE_CODE (expr);
-  if (code == ADDR_EXPR)
+  if (code == ADDR_EXPR
+      && TREE_CODE (TREE_OPERAND (expr, 0)) != FUNCTION_DECL)
     {
       unsigned int bitalign;
       bitalign = get_object_alignment_1 (TREE_OPERAND (expr, 0), residue);

gcc/testsuite/ChangeLog

+2011-06-27  Michael Hope  <michael.hope@linaro.org>
+	    Richard Sandiford  <richard.sandiford@linaro.org>
+
+	PR tree-optimization/49169
+	* gcc.dg/torture/pr49169.c: New test.
+
 2011-06-26  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
 
 	PR testsuite/49529

gcc/testsuite/gcc.dg/torture/pr49169.c

+#include <stdlib.h>
+#include <stdint.h>
+
+int
+main (void)
+{
+  void *p = main;
+  if ((intptr_t) p & 1)
+    abort ();
+  return 0;
+}
+
+/* { dg-final { scan-assembler "abort" } } */