re PR c/9262 (ICE on false case label)

	PR c/9262
	* c-typeck.c (do_case): Attach the first case label to the SWITCH_BODY.
	(c_finish_case): Rechain the next statements to the SWITCH_STMT.

From-SVN: r63783

gcc/ChangeLog

+2003-03-04  Eric Botcazou  <ebotcazou@libertysurf.fr>
+
+	PR c/9262
+	* c-typeck.c (do_case): Attach the first case label to the SWITCH_BODY.
+	(c_finish_case): Rechain the next statements to the SWITCH_STMT.
+
 Tue Mar  4 11:30:04 CET 2003  Jan Hubicka  <jh@suse.cz>
 
 	* doc/invoke.texi:  Document that unit-at-a-time is enabled for -O3

gcc/c-typeck.c

@@ -7184,11 +7184,19 @@ do_case (low_value, high_value)
 
   if (switch_stack)
     {
+      bool switch_was_empty_p = (SWITCH_BODY (switch_stack->switch_stmt) == NULL_TREE);
+
       label = c_add_case_label (switch_stack->cases, 
 				SWITCH_COND (switch_stack->switch_stmt), 
 				low_value, high_value);
       if (label == error_mark_node)
 	label = NULL_TREE;
+      else if (switch_was_empty_p)
+	{
+	  /* Attach the first case label to the SWITCH_BODY.  */
+	  SWITCH_BODY (switch_stack->switch_stmt) = TREE_CHAIN (switch_stack->switch_stmt);
+	  TREE_CHAIN (switch_stack->switch_stmt) = NULL_TREE;
+	}
     }
   else if (low_value)
     error ("case label not within a switch statement");
@@ -7205,7 +7213,8 @@ c_finish_case ()
 {
   struct c_switch *cs = switch_stack;
 
-  RECHAIN_STMTS (cs->switch_stmt, SWITCH_BODY (cs->switch_stmt)); 
+  /* Rechain the next statements to the SWITCH_STMT.  */
+  last_tree = cs->switch_stmt;
 
   /* Pop the stack.  */
   switch_stack = switch_stack->next;

gcc/testsuite/ChangeLog

+2003-03-04  Eric Botcazou  <ebotcazou@libertysurf.fr>
+
+	* gcc.dg/switch-2.c: New test.
+	* gcc.dg/switch-3.c: New test.
+	* gcc.dg/Wswitch.c: Adjust line numbers.
+	* gcc.dg/Wswitch-default.c: Likewise.
+	* gcc.dg/Wswitch-enum.c: Likewise.
+
 2003-03-04  Alexandre Oliva  <aoliva@redhat.com>
 
 	* gcc.c-torture/execute/20030222-1.c: New test.

gcc/testsuite/gcc.dg/Wswitch-default.c

@@ -18,8 +18,8 @@ foo (int i, int j, enum e ei, enum e ej, enum e ek, enum e el,
     case 4: return 3;
     default: break;
     }
-  switch (ei)
-    { /* { dg-warning "switch missing default case" } */
+  switch (ei) /* { dg-warning "switch missing default case" } */
+    {
     }
   switch (ej)
     {

gcc/testsuite/gcc.dg/Wswitch-enum.c

@@ -19,9 +19,9 @@ foo (int i, int j, enum e ei, enum e ej, enum e ek, enum e el,
     case 4: return 3;
     default: break;
     }
-  switch (ei)
-    { /* { dg-warning "enumeration value `e1' not handled in switch" "enum e1" } */
-    } /* { dg-warning "enumeration value `e2' not handled in switch" "enum e2" { target *-*-* } 23 } */
+  switch (ei) /* { dg-warning "enumeration value `e1' not handled in switch" "enum e1" } */
+    { /* { dg-warning "enumeration value `e2' not handled in switch" "enum e2" { target *-*-* } 22 } */
+    }
   switch (ej)
     { /* { dg-warning "enumeration value `e1' not handled in switch" "enum e1" { target *-*-* } 28 } */
     default: break;

gcc/testsuite/gcc.dg/Wswitch.c

@@ -19,9 +19,9 @@ foo (int i, int j, enum e ei, enum e ej, enum e ek, enum e el,
     case 4: return 3;
     default: break;
     }
-  switch (ei)
-    { /* { dg-warning "enumeration value `e1' not handled in switch" "enum e1" } */
-    } /* { dg-warning "enumeration value `e2' not handled in switch" "enum e2" { target *-*-* } 23 } */
+  switch (ei) /* { dg-warning "enumeration value `e1' not handled in switch" "enum e1" } */
+    { /*{ dg-warning "enumeration value `e2' not handled in switch" "enum e2" { target *-*-* } 22 } */
+    }
   switch (ej)
     {
     default: break;

gcc/testsuite/gcc.dg/switch-2.c

+/* PR c/9262 */
+/* Originator: Rasmus Hahn <rassahah@neofonie.de> */
+/* { dg-do compile } */
+
+int foo(int i)
+{
+  switch (i)
+    case 3:
+      return 1,
+}  /* { dg-error "(parse|syntax) error" } */

gcc/testsuite/gcc.dg/switch-3.c

+/* PR c/9262 */
+/* Originator: Rasmus Hahn <rassahah@neofonie.de> */
+/* { dg-do compile } */
+
+int foo(int i)
+{
+  switch (i)
+    case 3:
+      return 1;
+    case 4:      /* { dg-error "not within a switch statement" } */
+      return 1;
+}