1; RUN: not --crash llc -mtriple=x86_64-linux-gnu %s -o - 2>&1 | FileCheck %s 2 3; CHECK: LLVM ERROR: failed to perform tail call elimination on a call site marked musttail 4declare tailcc [16 x i64] @callee() 5define tailcc [16 x i64] @caller() { 6 %res = musttail call tailcc [16 x i64] @callee() 7 ret [16 x i64] %res 8} 9