[TestValueOfVectorVariable] Reduce the vector size to 4.

[sivachandra]

Summary

On x86, we only have 4 watchpoint registers.

[sivachandra]

I am not very familiar with the watchpoint logic. I think it is not smart enough (yet) to figure that a vector of 16 elements which are 2 bytes each can be watched using the 4 watchpoint registers on x86. I could be wrong, in which case I would be glad to accept suggestions to fix this test on x86(_64).

[sivachandra]

I am going to push this to get the bots back to green.

test/functionalities/watchpoint/watchpoint_on_vectors/TestValueOfVectorVariable.py

def value_of_vector_variable_with_watchpoint_set(self):
         # Set break to get a frame
         self.runCmd("b main")
             
         # Run the program.
         self.runCmd("run", RUN_SUCCEEDED)
 
         # Value of a vector variable should be displayed correctly
         self.expect("watchpoint set variable global_vector", WATCHPOINT_CREATED,
-            substrs = ['new value: (1, 2, 3, 4, 5, 6, 7, 8)'])
+            substrs = ['new value: (1, 2, 3, 4)'])
 
 if __name__ == '__main__':
     import atexit
     lldb.SBDebugger.Initialize()
     atexit.register(lambda: lldb.SBDebugger.Terminate())
     unittest2.main()

test/functionalities/watchpoint/watchpoint_on_vectors/main.c

 //===-- main.c --------------------------------------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
-typedef short v8i16 __attribute__ ((vector_size(16)));
-v8i16 global_vector = {1, 2, 3, 4, 5, 6, 7, 8};
+typedef char v4i8 __attribute__ ((vector_size(4)));
+v4i8 global_vector = {1, 2, 3, 4};
 
-int main()
+int
+main ()
 {
+  return 0;
 }