[Mono-bugs] [Bug 31541][Nor] Changed - compilation issue with labels and goto

bugzilla-daemon@rocky.ximian.com bugzilla-daemon@rocky.ximian.com
3 Oct 2002 04:11:15 -0000

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Changed by miguel@ximian.com.


--- shadow/31541	Tue Oct  1 04:27:15 2002
+++ shadow/31541.tmp.17895	Thu Oct  3 00:11:15 2002
@@ -2,16 +2,16 @@
 Product: Mono/MCS
 Version: unspecified
 OS: other
 OS Details: 
 Status: NEW   
+Severity: Unknown
 Priority: Normal
 Component: Misc
-AssignedTo: mono-bugs@ximian.com                            
+AssignedTo: martin@gnome.org                            
 ReportedBy: lupus@ximian.com               
 QAContact: mono-bugs@ximian.com
 TargetMilestone: ---
 Summary: compilation issue with labels and goto
@@ -37,6 +37,33 @@
  static void Main() {}
 One of the labels ends up corrupted and mcs will get and exception when
 running on the ms runtime (on the mono runtime it produces an invalid
 program since the branch target will be out of the method code).
+------- Additional Comments From miguel@ximian.com  2002-10-03 00:11 -------
+I have a smaller test case.  This seems to be related to some form
+of flow analysis, if you remove the "return" from the code, then
+the code is properly generated.
+Basically what happens is that we are not calling the Emit method
+for the LabeledStatement whose label is L2, only L1 and L3 are being
+called, so the Label in the Labeled statement contains an undefined
+Martin, could you please look at this?
+class T {
+    static int xx (int n) {
+         if (n <= 1) goto L3;
+         L1:
+         if (1 <= n) goto L2;
+         return n;
+         L2:
+         goto L1;
+         L3:               
+         return n;
+    }
+    static void Main() {}