# UNSUPPORTED: reverse_iteration
# RUN: not llc -mtriple=amdgcn-- -mcpu=gfx900 -run-pass=none -o - %s 2>&1 | FileCheck %s

# Check a diagnostic is emitted if non-allocatable classes are used
# with virtual registers, and there's no assert.

# CHECK: error: {{.*}}: Cannot use non-allocatable class 'TTMP_32' for virtual register named_use in function 'virtreg_unallocatable'
# CHECK: error: {{.*}}: Cannot use non-allocatable class 'TTMP_32' for virtual register named_def in function 'virtreg_unallocatable'
# CHECK: error: {{.*}}: Cannot use non-allocatable class 'TTMP_32' for virtual register 0 in function 'virtreg_unallocatable'
# CHECK: error: {{.*}}: Cannot use non-allocatable class 'TTMP_32' for virtual register 2 in function 'virtreg_unallocatable'
# CHECK: error: {{.*}}: Cannot use non-allocatable class 'TTMP_32' for virtual register 1 in function 'virtreg_unallocatable'

---
name: virtreg_unallocatable
tracksRegLiveness: true
registers:
  - { id: 0, class: ttmp_32}
body:             |
  bb.0:
    %1:ttmp_32 = IMPLICIT_DEF
    S_NOP 0, implicit %2:ttmp_32

    %named_def:ttmp_32 = IMPLICIT_DEF
    S_NOP 0, implicit %named_use:ttmp_32

...