re PR tree-optimization/26179 (ICE while compiling mozilla in tree-ssa-pre.c)

2006-02-09  Andrew Pinski  <pinskia@physics.uc.edu>

        PR tree-opt/26179
        * g++.dg/opt/pr26179.C: New test.
2006-02-09  Andrew Pinski  <pinskia@physics.uc.edu>

        PR tree-opt/26179
        * tree-ssa-pre.c (create_component_ref_by_pieces):
        Handle RETURN_DECL like VAR_DECL.

From-SVN: r110801

gcc/ChangeLog

 2006-02-09  Andrew Pinski  <pinskia@physics.uc.edu>
 
+	PR tree-opt/26179
+	* tree-ssa-pre.c (create_component_ref_by_pieces):
+	Handle RETURN_DECL like VAR_DECL.
+
+2006-02-09  Andrew Pinski  <pinskia@physics.uc.edu>
+
 	PR middle-end/26134
 	* fold-const.c (fold_indirect_ref_1): Fold 
 	"*(foo *)&complexfoo" to "__real__ complexfoo"

gcc/testsuite/ChangeLog

 2006-02-09  Andrew Pinski  <pinskia@physics.uc.edu>
 
+	PR tree-opt/26179
+	* g++.dg/opt/pr26179.C: New test.
+
+2006-02-09  Andrew Pinski  <pinskia@physics.uc.edu>
+
 	PR middle-end/26134
 	* gcc.dg/tree-ssa/complex-3.c: New test.
 

gcc/testsuite/g++.dg/opt/pr26179.C

+/* The problem here is that Load PRE on the tree level
+   forgot to handle RETURN_DECL which causes us to ICE. */
+
+// { dg-do compile }
+// { dg-options "-O2" }
+
+struct a
+{
+  int i;
+};
+void h(struct a&);
+void l(void);
+
+struct a g(void)
+{
+  struct a fl;
+  h(fl);
+  if (fl.i)
+    l();
+  fl.i+=2;
+  return fl;
+}

gcc/tree-ssa-pre.c

@@ -2161,6 +2161,7 @@ create_component_ref_by_pieces (basic_block block, tree expr, tree stmts)
       break;
     case VAR_DECL:
     case PARM_DECL:
+    case RESULT_DECL:
     case SSA_NAME:
       return genop;
     default: