[clang] [Clang] add additional tests for -Wshift-bool (PR #130339)

[Oleksandr T. via cfe-commits]

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@@ -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) { }
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a-tarasyuk wrote:

should `_Bool` be used?

https://github.com/llvm/llvm-project/pull/130339