Trying to eliminate optimizations on some functions with VC++

[Paul Dufresne]

Lee said to test:
===
#include <stdlib.h>
#include <stdio.h>
int main (int argc, char ** argv) {
  printf ("%d\n", (int) strtoul (argv [1], NULL, 10) >> 1);
  return EXIT_SUCCESS;
}

Run this program with -1 as input. The correct output should be -1 in
this case. If it is a positive number, then VC has a serious bug.
===

My result is:
===
C:\testvc>cl /Ox test.c
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 13.10.3077 for 80x86
Copyright (C) Microsoft Corporation 1984-2002. All rights reserved.

test.c
Microsoft (R) Incremental Linker Version 7.10.3077
Copyright (C) Microsoft Corporation.  All rights reserved.

/out:test.exe
test.obj

C:\testvc>test -84
-42

C:\testvc>test 12
6

C:\testvc>test -2
-1

C:\testvc>test -1
-1
===
So the answer is not so obvious.

--Paul

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