Adds Test for the emitted IL for Int64 constants

tests/fsharpqa/Source/CodeGen/EmittedIL/Misc/Int64.fs

@@ -0,0 +1,4 @@
+let a = 2L
+let b = 20L
+let c = 2147483649L
+let d = 932147483649L

tests/fsharpqa/Source/CodeGen/EmittedIL/Misc/Int64.il.bsl

@@ -0,0 +1,134 @@
+
+//  Microsoft (R) .NET Framework IL Disassembler.  Version 4.6.1055.0
+//  Copyright (c) Microsoft Corporation.  All rights reserved.
+
+
+
+// Metadata version: v4.0.30319
+.assembly extern mscorlib
+{
+  .publickeytoken = (B7 7A 5C 56 19 34 E0 89 )                         // .z\V.4..
+  .ver 4:0:0:0
+}
+.assembly extern FSharp.Core
+{
+  .publickeytoken = (B0 3F 5F 7F 11 D5 0A 3A )                         // .?_....:
+  .ver 4:4:1:0
+}
+.assembly Int64
+{
+  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.FSharpInterfaceDataVersionAttribute::.ctor(int32,
+                                                                                                      int32,
+                                                                                                      int32) = ( 01 00 02 00 00 00 00 00 00 00 00 00 00 00 00 00 ) 
+  .hash algorithm 0x00008004
+  .ver 0:0:0:0
+}
+.mresource public FSharpSignatureData.Int64
+{
+  // Offset: 0x00000000 Length: 0x0000020D
+  // WARNING: managed resource file FSharpSignatureData.Int64 created
+}
+.mresource public FSharpOptimizationData.Int64
+{
+  // Offset: 0x00000218 Length: 0x000000D4
+  // WARNING: managed resource file FSharpOptimizationData.Int64 created
+}
+.module Int64.exe
+// MVID: {59C696CC-77F4-40B2-A745-0383CC96C659}
+.imagebase 0x00400000
+.file alignment 0x00000200
+.stackreserve 0x00100000
+.subsystem 0x0003       // WINDOWS_CUI
+.corflags 0x00000001    //  ILONLY
+// Image base: 0x02640000
+
+
+// =============== CLASS MEMBERS DECLARATION ===================
+
+.class public abstract auto ansi sealed Int64
+       extends [mscorlib]System.Object
+{
+  .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = ( 01 00 07 00 00 00 00 00 ) 
+  .method public specialname static int64 
+          get_a() cil managed
+  {
+    .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
+    .custom instance void [mscorlib]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
+    // Code size       3 (0x3)
+    .maxstack  8
+    IL_0000:  ldc.i4.2
+    IL_0001:  conv.i8
+    IL_0002:  ret
+  } // end of method Int64::get_a
+
+  .method public specialname static int64 
+          get_b() cil managed
+  {
+    .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
+    .custom instance void [mscorlib]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
+    // Code size       4 (0x4)
+    .maxstack  8
+    IL_0000:  ldc.i4.s   20
+    IL_0002:  conv.i8
+    IL_0003:  ret
+  } // end of method Int64::get_b
+
+  .method public specialname static int64 
+          get_c() cil managed
+  {
+    .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
+    .custom instance void [mscorlib]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
+    // Code size       7 (0x7)
+    .maxstack  8
+    IL_0000:  ldc.i4     0x80000001
+    IL_0005:  conv.u8
+    IL_0006:  ret
+  } // end of method Int64::get_c
+
+  .method public specialname static int64 
+          get_d() cil managed
+  {
+    .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = ( 01 00 00 00 ) 
+    .custom instance void [mscorlib]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = ( 01 00 00 00 ) 
+    // Code size       10 (0xa)
+    .maxstack  8
+    IL_0000:  ldc.i8     0xd90851d401
+    IL_0009:  ret
+  } // end of method Int64::get_d
+
+  .property int64 a()
+  {
+    .get int64 Int64::get_a()
+  } // end of property Int64::a
+  .property int64 b()
+  {
+    .get int64 Int64::get_b()
+  } // end of property Int64::b
+  .property int64 c()
+  {
+    .get int64 Int64::get_c()
+  } // end of property Int64::c
+  .property int64 d()
+  {
+    .get int64 Int64::get_d()
+  } // end of property Int64::d
+} // end of class Int64
+
+.class private abstract auto ansi sealed '<StartupCode$Int64>'.$Int64
+       extends [mscorlib]System.Object
+{
+  .method public static void  main@() cil managed
+  {
+    .entrypoint
+    // Code size       1 (0x1)
+    .maxstack  8
+    IL_0000:  ret
+  } // end of method $Int64::main@
+
+} // end of class '<StartupCode$Int64>'.$Int64
+
+
+// =============================================================
+
+// *********** DISASSEMBLY COMPLETE ***********************
+// WARNING: Created Win32 resource file Int64.res