add c test

Author: a-tarasyuk

clang/test/Sema/shift-bool.c

@@ -0,0 +1,24 @@
+// RUN: %clang_cc1 -fsyntax-only -Wshift-bool -verify %s
+
+void t() {
+  int x = 10;
+  int y = 1;
+
+  int a = y << x;
+  int b = y >> x;
+
+  int c = 0 << x;
+  int d = 0 >> x;
+
+  int e = y << 1;
+  int f = y >> 1;
+
+  int g = y << -1; // expected-warning {{shift count is negative}}
+  int h = y >> -1; // expected-warning {{shift count is negative}}
+
+  int i = y << 0;
+  int j = y >> 0;
+
+  if ((y << 1) != 0) { }
+  if ((y >> 1) != 0) { }
+}

clang/test/Sema/shift-bool.cpp

@@ -3,7 +3,6 @@
 void t() {
   int x = 10;
   bool y = true;
-  int z = 1;
 
   bool a = y << x;
   bool b = y >> x; // expected-warning {{right shifting a 'bool' implicitly converts it to 'int'}}
@@ -23,6 +22,4 @@ void t() {
 
   if ((y << 1) != 0) { }
   if ((y >> 1) != 0) { } // expected-warning {{right shifting a 'bool' implicitly converts it to 'int'}}
-
-  bool k = (x < z) >> 1; // expected-warning {{right shifting a 'bool' implicitly converts it to 'int'}}
 }