[Mono-bugs] [Bug 80190][Nor] New - Problem concerning 64bit pointer

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Changed by c at tqzh.tk.

http://bugzilla.ximian.com/show_bug.cgi?id=80190

--- shadow/80190	2006-12-08 23:23:40.000000000 -0500
+++ shadow/80190.tmp.28962	2006-12-08 23:23:40.000000000 -0500
@@ -0,0 +1,74 @@
+Bug#: 80190
+Product: Mono: Runtime
+Version: 1.2
+OS: All
+OS Details: maybe all OS of x64 edition
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: JIT
+AssignedTo: lupus at ximian.com                            
+ReportedBy: c at tqzh.tk               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: Problem concerning 64bit pointer
+
+Description of Problem:
+It's aborted when a certain code concerning the pointer is compiled by VC#
+ and it executed by mono in linux (x64 edition). 
+
+
+Steps to reproduce the problem:
+1. Compile the following codes by csc (VisualC# 2005). 
+
+// csc.exe /unsafe Test.cs
+public class Test {
+    public static void Main() {
+        unsafe {
+            int n;
+            int* p = &n;
+            *p = 3;
+        }
+    }
+}
+
+2. Execute Test.exe by mono on the Linux of x64 edition.
+
+Actual Results:
+Thrown NullReferenceException.
+
+Expected Results:
+Anything doesn't happen. 
+
+How often does this happen? 
+Every time.
+
+Additional Information:
+The highest 32 bits were 0 
+when calling ' Console.WriteLine("{0:x16}", (long)p); ' before ' *p = 3; .'
+
+IL was as follows. 
+
+  .method public hidebysig static void  Main() cil managed
+  {
+    .entrypoint
+    .maxstack  2
+    .locals init (int32 V_0,
+             int32* V_1)
+    IL_0000:  nop
+    IL_0001:  nop
+    IL_0002:  ldloca.s   V_0
+    IL_0004:  conv.u
+    IL_0005:  stloc.1
+    IL_0006:  ldloc.1
+    IL_0007:  ldc.i4.3
+    IL_0008:  stind.i4
+    IL_0009:  nop
+    IL_000a:  ret
+  }
+
+I think that the cause is conv.u of amd64. 
+Please correct it.