[backport gcc-4.7.3 r195655 <mikpe@it.uu.se>]

gcc/

2013-02-01  Jakub Jelinek  <jakub@redhat.com>

	Backported from mainline
	2013-01-10  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/55921
	* tree-complex.c (expand_complex_asm): New function.
	(expand_complex_operations_1): Call it for GIMPLE_ASM.

gcc/testsuite/

2013-02-01  Jakub Jelinek  <jakub@redhat.com>

	Backported from mainline
	2013-01-10  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/55921
	* gcc.c-torture/compile/pr55921.c: New test.

--- gcc-4.6.3/gcc/testsuite/gcc.c-torture/compile/pr55921.c.~1~	1970-01-01 01:00:00.000000000 +0100
+++ gcc-4.6.3/gcc/testsuite/gcc.c-torture/compile/pr55921.c	2013-02-02 12:15:31.549569895 +0100
@@ -0,0 +1,22 @@
+/* PR tree-optimization/55921 */
+/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
+
+typedef union
+{
+  _Complex float cf;
+  long long ll;
+} ucf;
+
+void
+foo (ucf *in, ucf *out, _Complex float r)
+{
+  int i;
+  ucf ucf1;
+  _Complex float cf;
+
+  ucf1.ll = in[i].ll;
+  __asm ("" : "=r" (cf) : "0" (ucf1.ll));
+  cf *= r;
+  __asm ("" : "=r" (ucf1.ll) : "0" (cf));
+  out[i].ll = ucf1.ll;
+}
--- gcc-4.6.3/gcc/tree-complex.c.~1~	2010-10-21 04:33:33.000000000 +0200
+++ gcc-4.6.3/gcc/tree-complex.c	2013-02-02 12:15:31.549569895 +0100
@@ -1400,6 +1400,36 @@ expand_complex_comparison (gimple_stmt_i
   update_stmt (stmt);
 }
 
+/* Expand inline asm that sets some complex SSA_NAMEs.  */
+
+static void
+expand_complex_asm (gimple_stmt_iterator *gsi)
+{
+  gimple stmt = gsi_stmt (*gsi);
+  unsigned int i;
+
+  for (i = 0; i < gimple_asm_noutputs (stmt); ++i)
+    {
+      tree link = gimple_asm_output_op (stmt, i);
+      tree op = TREE_VALUE (link);
+      if (TREE_CODE (op) == SSA_NAME
+	  && TREE_CODE (TREE_TYPE (op)) == COMPLEX_TYPE)
+	{
+	  tree type = TREE_TYPE (op);
+	  tree inner_type = TREE_TYPE (type);
+	  tree r = build1 (REALPART_EXPR, inner_type, op);
+	  tree i = build1 (IMAGPART_EXPR, inner_type, op);
+	  gimple_seq list = set_component_ssa_name (op, false, r);
+
+	  if (list)
+	    gsi_insert_seq_after (gsi, list, GSI_CONTINUE_LINKING);
+
+	  list = set_component_ssa_name (op, true, i);
+	  if (list)
+	    gsi_insert_seq_after (gsi, list, GSI_CONTINUE_LINKING);
+	}
+    }
+}
 
 /* Process one statement.  If we identify a complex operation, expand it.  */
 
@@ -1412,6 +1442,12 @@ expand_complex_operations_1 (gimple_stmt
   complex_lattice_t al, bl;
   enum tree_code code;
 
+  if (gimple_code (stmt) == GIMPLE_ASM)
+    {
+      expand_complex_asm (gsi);
+      return;
+    }
+
   lhs = gimple_get_lhs (stmt);
   if (!lhs && gimple_code (stmt) != GIMPLE_COND)
     return;