[PATCH] D148689: [clang][Interp] Handle PredefinedExprs

[Timm Bäder via Phabricator via cfe-commits]

tbaeder updated this revision to Diff 519479.

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D148689/new/

https://reviews.llvm.org/D148689

Files:
  clang/lib/AST/Interp/ByteCodeExprGen.cpp
  clang/lib/AST/Interp/ByteCodeExprGen.h
  clang/test/AST/Interp/literals.cpp


Index: clang/test/AST/Interp/literals.cpp
===================================================================
--- clang/test/AST/Interp/literals.cpp
+++ clang/test/AST/Interp/literals.cpp
@@ -831,3 +831,22 @@
 }
 
 #endif
+
+namespace PredefinedExprs {
+#if __cplusplus >= 201402L
+  constexpr bool strings_match(const char *str1, const char *str2) {
+    while (*str1 && *str2) {
+      if (*str1++ != *str2++)
+        return false;
+    };
+
+    return *str1 == *str2;
+  }
+
+  void foo() {
+    static_assert(strings_match(__FUNCTION__, "foo"));
+    static_assert(strings_match(__func__, "foo"));
+    static_assert(strings_match(__PRETTY_FUNCTION__, "void PredefinedExprs::foo()"));
+  }
+#endif
+}
Index: clang/lib/AST/Interp/ByteCodeExprGen.h
===================================================================
--- clang/lib/AST/Interp/ByteCodeExprGen.h
+++ clang/lib/AST/Interp/ByteCodeExprGen.h
@@ -96,6 +96,7 @@
   bool VisitCompoundLiteralExpr(const CompoundLiteralExpr *E);
   bool VisitTypeTraitExpr(const TypeTraitExpr *E);
   bool VisitLambdaExpr(const LambdaExpr *E);
+  bool VisitPredefinedExpr(const PredefinedExpr *E);
 
 protected:
   bool visitExpr(const Expr *E) override;
Index: clang/lib/AST/Interp/ByteCodeExprGen.cpp
===================================================================
--- clang/lib/AST/Interp/ByteCodeExprGen.cpp
+++ clang/lib/AST/Interp/ByteCodeExprGen.cpp
@@ -1004,6 +1004,14 @@
   return true;
 }
 
+template <class Emitter>
+bool ByteCodeExprGen<Emitter>::VisitPredefinedExpr(const PredefinedExpr *E) {
+  if (DiscardResult)
+    return true;
+
+  return this->visit(E->getFunctionName());
+}
+
 template <class Emitter> bool ByteCodeExprGen<Emitter>::discard(const Expr *E) {
   if (E->containsErrors())
     return false;


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