Marshmallow  |  6.0.1_r16
C++程序  |  5行  |  185 B 

// RUN: %clang -target aarch64-none-gnu -ffixed-x18 -### %s 2> %t
// RUN: FileCheck --check-prefix=CHECK-FIXED-X18 < %t %s

// CHECK-FIXED-X18: "-backend-option" "-aarch64-reserve-x18"