re PR middle-end/38969 (-foptimize-sibling-calls generates wrong code on alpha)

	PR middle-end/38969
	* calls.c (initialize_argument_information): Do not wrap complex
	arguments in SAVE_EXPR.

testsuite/ChangeLog:

	PR middle-end/38969
	* gcc.c-torture/execute/pr38969.c: New test.

From-SVN: r143699

gcc/ChangeLog

+2009-01-27 Uros Bizjak <ubizjak@gmail.com>
+
+	PR middle-end/38969
+	* calls.c (initialize_argument_information): Do not wrap complex
+	arguments in SAVE_EXPR.
+
 2009-01-26  Andreas Tobler  <a.tobler@schweiz.org>
 
 	* config/t-vxworks (LIBGCC2_INCLUDES): Fix typo.

gcc/calls.c

@@ -992,7 +992,6 @@ initialize_argument_information (int num_actuals ATTRIBUTE_UNUSED,
 	    && targetm.calls.split_complex_arg (argtype))
 	  {
 	    tree subtype = TREE_TYPE (argtype);
-	    arg = save_expr (arg);
 	    args[j].tree_value = build1 (REALPART_EXPR, subtype, arg);
 	    j += inc;
 	    args[j].tree_value = build1 (IMAGPART_EXPR, subtype, arg);

gcc/testsuite/ChangeLog

+2009-01-27 Uros Bizjak <ubizjak@gmail.com>
+
+	PR middle-end/38969
+	* gcc.c-torture/execute/pr38969.c: New test.
+
 2009-01-26  Adam Nemet  <anemet@caviumnetworks.com>
 
 	PR testsuite/38864
-	* gcc.target/mips/fixed-vector-type.c: Add target { fixed_point}
+	* gcc.target/mips/fixed-vector-type.c: Add target { fixed_point }
 	to dg-do compile.
 	* gcc.target/mips/fixed-scalar-type.c: Likewise.
 	* gcc.target/mips/dpaq_sa_l_w.c: Likewise.

gcc/testsuite/gcc.c-torture/execute/pr38969.c

+__complex__ float
+__attribute__ ((noinline)) foo (__complex__ float x)
+{
+  return x;
+}
+
+__complex__ float
+__attribute__ ((noinline)) bar (__complex__ float x)
+{
+  return foo (x);
+}
+
+int main()
+{
+  __complex__ float a, b;
+  __real__ a = 9;
+  __imag__ a = 42;
+
+  b = bar (a);
+
+  if (a != b)
+    abort ();
+
+  return 0;
+}