re PR debug/45003 (VTA issues with sign/zero extension and debug temporaries)

	PR debug/45003
	* cfgexpand.c (expand_debug_expr) <case NOP_EXPR>: Use ZERO_EXTEND
	or SIGN_EXTEND depending on TYPE_UNSIGNED of the operand's type
	instead of the result's type.

	* gcc.dg/guality/pr45003-1.c: New test.

From-SVN: r162336

gcc/ChangeLog

+2010-07-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/45003
+	* cfgexpand.c (expand_debug_expr) <case NOP_EXPR>: Use ZERO_EXTEND
+	or SIGN_EXTEND depending on TYPE_UNSIGNED of the operand's type
+	instead of the result's type.
+
 2010-07-20  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/44977

gcc/cfgexpand.c

@@ -2427,7 +2427,7 @@ expand_debug_expr (tree exp)
 	  op0 = simplify_gen_subreg (mode, op0, inner_mode,
 				     subreg_lowpart_offset (mode,
 							    inner_mode));
-	else if (unsignedp)
+	else if (TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (exp, 0))))
 	  op0 = gen_rtx_ZERO_EXTEND (mode, op0);
 	else
 	  op0 = gen_rtx_SIGN_EXTEND (mode, op0);

gcc/testsuite/ChangeLog

+2010-07-20  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/45003
+	* gcc.dg/guality/pr45003-1.c: New test.
+
 2010-07-20  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/44977

gcc/testsuite/gcc.dg/guality/pr45003-1.c

+/* PR debug/45003 */
+/* { dg-do run { target { x86_64-*-* && lp64 } } } */
+/* { dg-options "-g" } */
+
+int __attribute__((noinline))
+foo (unsigned short *p)
+{
+  int a = *p;
+  asm volatile ("nop");
+  asm volatile ("nop" : : "D" (a));	/* { dg-final { gdb-test 10 "a" "0x8078" } } */
+  return 0;
+}
+
+int __attribute__((noinline))
+bar (short *p)
+{
+  unsigned int a = *p;
+  asm volatile ("nop");
+  asm volatile ("nop" : : "D" (a));	/* { dg-final { gdb-test 19 "a" "0xffff8078" } } */
+  return 0;
+}
+
+int
+main ()
+{
+  unsigned short us = 0x8078;
+  foo (&us);
+  short s = -32648;
+  bar (&s);
+  return 0;
+}