CfgStrip AST nodes marked with #[test]

gcc/rust/expand/rust-cfg-strip.cc

@@ -22,6 +22,7 @@
 #include "rust-path.h"
 #include "rust-session-manager.h"
 #include "rust-attribute-values.h"
+#include "rust-macro-expand.h"
 
 namespace Rust {
 
@@ -30,7 +31,7 @@ namespace Rust {
  * should be stripped. Note that attributes must be expanded before calling.
  */
 bool
-fails_cfg (const AST::AttrVec &attrs)
+CfgStrip::fails_cfg (const AST::AttrVec &attrs) const
 {
   auto &session = Session::get_instance ();
 
@@ -39,6 +40,9 @@ fails_cfg (const AST::AttrVec &attrs)
       if (attr.get_path () == Values::Attributes::CFG
 	  && !attr.check_cfg_predicate (session))
 	return true;
+      else if (!expansion_cfg.should_test
+	       && attr.get_path () == Values::Attributes::TEST)
+	return true;
     }
   return false;
 }
@@ -48,7 +52,7 @@ fails_cfg (const AST::AttrVec &attrs)
  * should be stripped. Will expand attributes as well.
  */
 bool
-fails_cfg_with_expand (AST::AttrVec &attrs)
+CfgStrip::fails_cfg_with_expand (AST::AttrVec &attrs) const
 {
   auto &session = Session::get_instance ();
 
@@ -85,6 +89,9 @@ fails_cfg_with_expand (AST::AttrVec &attrs)
 			  attr.as_string ().c_str ());
 	    }
 	}
+      else if (!expansion_cfg.should_test
+	       && attr.get_path () == Values::Attributes::TEST)
+	return true;
     }
   return false;
 }

gcc/rust/expand/rust-cfg-strip.h

@@ -23,14 +23,23 @@
 #include "rust-item.h"
 
 namespace Rust {
+
+// forward declare
+struct ExpansionCfg;
+
 // Visitor used to maybe_strip attributes.
 class CfgStrip : public AST::DefaultASTVisitor
 {
 private:
+  bool fails_cfg (const AST::AttrVec &attrs) const;
+
+  bool fails_cfg_with_expand (AST::AttrVec &attrs) const;
+
 public:
   using DefaultASTVisitor::visit;
 
-  CfgStrip () {}
+  CfgStrip (const ExpansionCfg &expansion_cfg) : expansion_cfg (expansion_cfg)
+  {}
 
   /* Run the AttrVisitor on an entire crate */
   void go (AST::Crate &crate);
@@ -194,6 +203,9 @@ class CfgStrip : public AST::DefaultASTVisitor
   {
     DefaultASTVisitor::visit (item);
   }
+
+private:
+  const ExpansionCfg &expansion_cfg;
 };
 } // namespace Rust
 

gcc/rust/rust-session-manager.cc

@@ -938,7 +938,7 @@ Session::expansion (AST::Crate &crate, Resolver2_0::NameResolutionContext &ctx)
 
   while (!fixed_point_reached && iterations < cfg.recursion_limit)
     {
-      CfgStrip ().go (crate);
+      CfgStrip (cfg).go (crate);
       // Errors might happen during cfg strip pass
       bool visitor_dirty = false;
 

gcc/testsuite/rust/compile/cfg-test.rs

@@ -0,0 +1,4 @@
+#[test]
+fn foo() {
+    some_function_which_doesnt_exist();
+}