| # RUN: not llvm-mca -mtriple=x86_64-unknown-unknown -mcpu=btver2 %s 2>&1 | FileCheck %s | |
| # LLVM-MCA-BEGIN foo | |
| # LLVM-MCA-BEGIN bar | |
| # LLVM-MCA-END | |
| # CHECK: llvm-mca-markers-6.s:5:2: warning: Ignoring invalid region start | |
| # CHECK-NEXT: # LLVM-MCA-BEGIN bar | |
| # CHECK-NEXT: ^ | |
| # CHECK-NEXT: error: no assembly instructions found. |