diff --git a/Cargo.lock b/Cargo.lock
index 3062b191f35a0..488b51c9366b0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -77,7 +77,7 @@ dependencies = [
 [[package]]
 name = "gccjit"
 version = "1.0.0"
-source = "git+https://github.com/antoyo/gccjit.rs#78ed1a380eb276e7443645a41b0e87222f291e82"
+source = "git+https://github.com/antoyo/gccjit.rs#de70a3bdc1908098ae4b10efc530bd695971a67c"
 dependencies = [
  "gccjit_sys",
 ]
@@ -85,7 +85,7 @@ dependencies = [
 [[package]]
 name = "gccjit_sys"
 version = "0.0.1"
-source = "git+https://github.com/antoyo/gccjit.rs#78ed1a380eb276e7443645a41b0e87222f291e82"
+source = "git+https://github.com/antoyo/gccjit.rs#de70a3bdc1908098ae4b10efc530bd695971a67c"
 dependencies = [
  "libc",
 ]
diff --git a/src/attributes.rs b/src/attributes.rs
index 0fda9e7ae50b9..6195de912d278 100644
--- a/src/attributes.rs
+++ b/src/attributes.rs
@@ -121,6 +121,9 @@ pub fn from_fn_attrs<'gcc, 'tcx>(
         if codegen_fn_attrs.flags.contains(CodegenFnAttrFlags::FFI_RETURNS_TWICE) {
             func.add_attribute(FnAttribute::ReturnsTwice);
         }
+        if codegen_fn_attrs.flags.contains(CodegenFnAttrFlags::FFI_PURE) {
+            func.add_attribute(FnAttribute::Pure);
+        }
     }
 
     let function_features =