Add support for CallExpr::isBuiltinConstantExpr(). For now, this hook is used to support CFConstantStrings. Can be extended to support other built-in functions.
This allows the following code to compile without error...
#include <CoreFoundation/CoreFoundation.h>
#define CONST_STRING_DECL(S, V) const CFStringRef S = (const CFStringRef)__builtin___CFStringMakeConstantString(V);
CONST_STRING_DECL(kCFTimeZoneSystemTimeZoneDidChangeNotification, "kCFTimeZoneSystemTimeZoneDidChangeNotification")
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@46592 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/AST/Expr.cpp b/AST/Expr.cpp
index e209db3..88c1b23 100644
--- a/AST/Expr.cpp
+++ b/AST/Expr.cpp
@@ -118,6 +118,24 @@
this->NumArgs = NumArgs;
}
+bool CallExpr::isBuiltinConstantExpr() const {
+ // All simple function calls (e.g. func()) are implicitly cast to pointer to
+ // function. As a result, we try and obtain the DeclRefExpr from the
+ // ImplicitCastExpr.
+ const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
+ if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
+ return false;
+
+ const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
+ if (!DRE)
+ return false;
+
+ // We have a DeclRefExpr.
+ if (strcmp(DRE->getDecl()->getName(),
+ "__builtin___CFStringMakeConstantString") == 0)
+ return true;
+ return false;
+}
bool CallExpr::isBuiltinClassifyType(llvm::APSInt &Result) const {
// The following enum mimics gcc's internal "typeclass.h" file.
@@ -471,6 +489,8 @@
static_cast<uint32_t>(Ctx.getTypeSize(getType(), CE->getLocStart())));
if (CE->isBuiltinClassifyType(Result))
return true;
+ if (CE->isBuiltinConstantExpr())
+ return true;
if (Loc) *Loc = getLocStart();
return false;
}