From 43554fbbca6379003a5aae66e3eb5477c49b3a4c Mon Sep 17 00:00:00 2001
From: Shuhei Kadowaki <40514306+aviatesk@users.noreply.github.com>
Date: Thu, 22 Feb 2024 17:05:41 +0900
Subject: [PATCH] disable the `cfg_simplify!` optimization on pre-1.11 versions
 (#548)

---
 src/interpreter.jl | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/interpreter.jl b/src/interpreter.jl
index efa27aac..564cf7a1 100644
--- a/src/interpreter.jl
+++ b/src/interpreter.jl
@@ -121,8 +121,13 @@ end
 
 function create_cthulhu_source(@nospecialize(opt), effects::Effects)
     isa(opt, OptimizationState) || return opt
-    # get the (theoretically) same effect as the jl_compress_ir -> jl_uncompress_ir -> inflate_ir round-trip
-    ir = CC.compact!(CC.cfg_simplify!(CC.copy(opt.ir::IRCode)))
+    @static if VERSION > v"1.10"
+        # get the (theoretically) same effect as the jl_compress_ir -> jl_uncompress_ir -> inflate_ir round-trip
+        ir = CC.compact!(CC.cfg_simplify!(CC.copy(opt.ir::IRCode)))
+    else
+        # TODO do the round-trip here?
+        ir = CC.copy(opt.ir::IRCode)
+    end
     return OptimizedSource(ir, opt.src, opt.src.inlineable, effects)
 end