Merge add_handler into catch_switch

Some codegen backends may require all handlers to be immediately known

2 files changed, 10 insertions, 11 deletions

diff --git a/compiler/rustc_codegen_llvm/src/builder.rs b/compiler/rustc_codegen_llvm/src/builder.rs
index 7d62e5e8d41..02b9f23c4d6 100644
--- a/compiler/rustc_codegen_llvm/src/builder.rs
+++ b/compiler/rustc_codegen_llvm/src/builder.rs
@@ -1028,7 +1028,7 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
         &mut self,
         parent: Option<&'ll Value>,
         unwind: Option<&'ll BasicBlock>,
-        num_handlers: usize,
+        handlers: &[&'ll BasicBlock],
     ) -> &'ll Value {
         let name = cstr!("catchswitch");
         let ret = unsafe {
@@ -1036,17 +1036,17 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
                 self.llbuilder,
                 parent,
                 unwind,
-                num_handlers as c_uint,
+                handlers.len() as c_uint,
                 name.as_ptr(),
             )
         };
-        ret.expect("LLVM does not have support for catchswitch")
-    }
-
-    fn add_handler(&mut self, catch_switch: &'ll Value, handler: &'ll BasicBlock) {
-        unsafe {
-            llvm::LLVMRustAddHandler(catch_switch, handler);
+        let ret = ret.expect("LLVM does not have support for catchswitch");
+        for handler in handlers {
+            unsafe {
+                llvm::LLVMRustAddHandler(ret, handler);
+            }
         }
+        ret
     }
 
     // Atomic Operations
diff --git a/compiler/rustc_codegen_llvm/src/intrinsic.rs b/compiler/rustc_codegen_llvm/src/intrinsic.rs
index 5adfa18035a..f51d014bfb3 100644
--- a/compiler/rustc_codegen_llvm/src/intrinsic.rs
+++ b/compiler/rustc_codegen_llvm/src/intrinsic.rs
@@ -525,9 +525,8 @@ fn codegen_msvc_try<'ll>(
 
         normal.ret(bx.const_i32(0));
 
-        let cs = catchswitch.catch_switch(None, None, 2);
-        catchswitch.add_handler(cs, catchpad_rust.llbb());
-        catchswitch.add_handler(cs, catchpad_foreign.llbb());
+        let cs =
+            catchswitch.catch_switch(None, None, &[catchpad_rust.llbb(), catchpad_foreign.llbb()]);
 
         // We can't use the TypeDescriptor defined in libpanic_unwind because it
         // might be in another DLL and the SEH encoding only supports specifying