Special handling of __builtin_expect in boolean expressions

...as found in Mac OS X' assert macro definition,

  __builtin_expect(!(e), 0) ? ... : ...

with type

  long __builtin_expect(long, long)

The code in literaltoboolconversion.cxx is needed for

  assert(false);

Change-Id: I42f87482c56986af74b2ec849db9852f74c7c938

compilerplugins/clang/implicitboolconversion.cxx

@@ -192,7 +192,9 @@ bool ImplicitBoolConversion::TraverseCallExpr(CallExpr * expr) {
                     && !(compat::getParamType(*t, n)->isSpecificBuiltinType(
                              BuiltinType::Int)
                          || (compat::getParamType(*t, n)->isSpecificBuiltinType(
-                                 BuiltinType::UInt))))
+                                 BuiltinType::UInt))
+                         || (compat::getParamType(*t, n)->isSpecificBuiltinType(
+                                 BuiltinType::Long))))
                 {
                     reportWarning(i);
                 }

compilerplugins/clang/literaltoboolconversion.cxx

+#include<iostream>
 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /*
  * This file is part of the LibreOffice project.
@@ -135,13 +136,18 @@ bool LiteralToBoolConversion::VisitImplicitCastExpr(
             << expr->getType() << expr->getSourceRange();
 #endif
     } else if (sub->isIntegerConstantExpr(compiler.getASTContext())) {
-        report(
-            DiagnosticsEngine::Warning,
-            ("implicit conversion (%0) of integer constant expression of type"
-             " %1 to %2"),
-            expr->getLocStart())
-            << expr->getCastKindName() << expr->getSubExpr()->getType()
-            << expr->getType() << expr->getSourceRange();
+        CallExpr const * ce = dyn_cast<CallExpr>(sub);
+        if (ce == nullptr
+            || ce->getBuiltinCallee() != Builtin::BI__builtin_expect)
+        {
+            report(
+                DiagnosticsEngine::Warning,
+                ("implicit conversion (%0) of integer constant expression of"
+                 " type %1 to %2"),
+                expr->getLocStart())
+                << expr->getCastKindName() << expr->getSubExpr()->getType()
+                << expr->getType() << expr->getSourceRange();
+        }
     }
     return true;
 }