[clang] Clang/Preprocessor: Support short circuit in directive (PR #123912)

[Aaron Ballman via cfe-commits]

================
@@ -0,0 +1,74 @@
+// RUN: %clang -E -MD -MF - %s | FileCheck -check-prefix ZERO_AND_HAS_INCLUDE %s
+//
+// ZERO_AND_HAS_INCLUDE-NOT: limits.h
+//
+#if 0 && __has_include(<limits.h>)
+#include <limits.h>
+#endif
+
+#if 4==5 && __has_include(<limits.h>)
+#include <limits.h>
+#endif
+
+#if defined(_THIS_IS_NOT_DEFINED) && __has_include(<limits.h>)
+#include <limits.h>
+#endif
+
+#if 0 && (__has_include(<limits.h>))
+#include <limits.h>
+#endif
+
+#if 4==5 && (__has_include(<limits.h>))
+#include <limits.h>
+#endif
+
+#if defined(_THIS_IS_NOT_DEFINED) && (__has_include(<limits.h>))
+#include <limits.h>
+#endif
+
+#if 0 && (5==5 && __has_include(<limits.h>))
+#include <limits.h>
+#endif
+
+#if 1 && (4==5 && __has_include(<limits.h>))
+#include <limits.h>
+#endif
+
+
+
----------------
AaronBallman wrote:

What happens with code like:
```
#if 0 && absolute garbage goes here
#endif
```
Do we still get an error for the incorrect code after the `&&`?

https://github.com/llvm/llvm-project/pull/123912