diff --git a/CMakeLists.txt b/CMakeLists.txt
index f861fc0..33d0c9a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,7 +27,8 @@ SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -ggdb")
 # This should be called with the .cc src file and it will generate a
 # src-file-ir target that can be built.
 # e.g. COMPILE_TO_IR(test.cc) generates the "test-ir" make target.
-set(IR_COMPILE_FLAGS "-emit-llvm" "-O3" "-c")
+# Disable compiler optimizations because generated IR is optimized at runtime
+set(IR_COMPILE_FLAGS "-emit-llvm" "-c")
 function(COMPILE_TO_IR SRC_FILE)
   get_filename_component(BASE_NAME ${SRC_FILE} NAME_WE)
   set(OUTPUT_FILE "build/${BASE_NAME}.ll")