llvm-project/clang/test/CodeGen/2010-05-26-AsmSideEffect.c

// RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s
// Radar 8026855

int test (void *src) {
  register int w0 asm ("0");
  // CHECK: call i32 asm "ldr $0, [$1]", "={ax},r,~{dirflag},~{fpsr},~{flags}"(i8*
  asm ("ldr %0, [%1]": "=r" (w0): "r" (src));
  return w0;
}