llvm/test/MC/AArch64/trbe-sysreg-diag.s - llvm-project - Git at Google

 // TRBE RO System register
 //
 // RUN: not llvm-mc -triple aarch64 -show-encoding < %s 2>&1 | FileCheck %s

 // Write to system register
 msr TRBIDR_EL1, x0

 // CHECK:      expected writable system register or pstate
 // CHECK-NEXT: msr TRBIDR_EL1, x0
	// TRBE RO System register
	//
	// RUN: not llvm-mc -triple aarch64 -show-encoding < %s 2>&1 \| FileCheck %s

	// Write to system register
	msr TRBIDR_EL1, x0

	// CHECK: expected writable system register or pstate
	// CHECK-NEXT: msr TRBIDR_EL1, x0