Use landingpad filter to encode aborting landing pad

Author: nbdd0121

compiler/rustc_codegen_gcc/src/builder.rs

@@ -1227,6 +1227,10 @@ impl<'a, 'gcc, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'gcc, 'tcx> {
         (value1, value2)
     }
 
+    fn filter_landing_pad(&mut self, pers_fn: RValue<'gcc>) -> (RValue<'gcc>, RValue<'gcc>) {
+        self.cleanup_landing_pad(pers_fn)
+    }
+
     #[cfg(feature="master")]
     fn resume(&mut self, exn0: RValue<'gcc>, _exn1: RValue<'gcc>) {
         let exn_type = exn0.get_type();

compiler/rustc_codegen_llvm/src/builder.rs

@@ -992,6 +992,13 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
         (self.extract_value(landing_pad, 0), self.extract_value(landing_pad, 1))
     }
 
+    fn filter_landing_pad(&mut self, pers_fn: &'ll Value) -> (&'ll Value, &'ll Value) {
+        let ty = self.type_struct(&[self.type_i8p(), self.type_i32()], false);
+        let landing_pad = self.landing_pad(ty, pers_fn, 1 /* FIXME should this be 0? */);
+        self.add_clause(landing_pad, self.const_array(self.type_i8p(), &[]));
+        (self.extract_value(landing_pad, 0), self.extract_value(landing_pad, 1))
+    }
+
     fn resume(&mut self, exn0: &'ll Value, exn1: &'ll Value) {
         let ty = self.type_struct(&[self.type_i8p(), self.type_i32()], false);
         let mut exn = self.const_poison(ty);

compiler/rustc_codegen_ssa/src/mir/block.rs

@@ -1600,7 +1600,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                 bx = Bx::build(self.cx, llbb);
 
                 let llpersonality = self.cx.eh_personality();
-                bx.cleanup_landing_pad(llpersonality);
+                bx.filter_landing_pad(llpersonality);
 
                 funclet = None;
             }

compiler/rustc_codegen_ssa/src/traits/builder.rs

@@ -274,6 +274,7 @@ pub trait BuilderMethods<'a, 'tcx>:
 
     // These are used by everyone except msvc
     fn cleanup_landing_pad(&mut self, pers_fn: Self::Value) -> (Self::Value, Self::Value);
+    fn filter_landing_pad(&mut self, pers_fn: Self::Value) -> (Self::Value, Self::Value);
     fn resume(&mut self, exn0: Self::Value, exn1: Self::Value);
 
     // These are used only by msvc