From 320c55590cc30d4ef5b2c1a226f0f940a6bdb445 Mon Sep 17 00:00:00 2001
From: Xavier Leroy <xavier.leroy@college-de-france.fr>
Date: Sun, 25 Apr 2021 13:57:47 +0200
Subject: Support __builtin_unreachable

Not yet used for optimizations.
---
 aarch64/Asmexpand.ml | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'aarch64')

diff --git a/aarch64/Asmexpand.ml b/aarch64/Asmexpand.ml
index 6c80e9d3..d24a9ef6 100644
--- a/aarch64/Asmexpand.ml
+++ b/aarch64/Asmexpand.ml
@@ -355,8 +355,12 @@ let expand_builtin_inline name args res =
   (* Synchronization *)
   | "__builtin_membar", [], _ ->
      ()
+  (* No operation *)
   | "__builtin_nop", [], _ ->
      emit Pnop
+  (* Optimization hint *)
+  | "__builtin_unreachable", [], _ ->
+     ()
   (* Byte swap *)
   | ("__builtin_bswap" | "__builtin_bswap32"), [BA(IR a1)], BR(IR res) ->
      emit (Prev(W, res, a1))
-- 
cgit