llvm/test/MachineVerifier/convergencectrl/AMDGPU/basic.mir

# RUN: not --crash llc -mtriple=amdgcn -run-pass=none -verify-machineinstrs -filetype=null %s 2>&1 | FileCheck %s
---
name:            basic
tracksRegLiveness: true
body:             |
  bb.0:
    successors: %bb.1, %bb.2;
    %0:sgpr_64 = CONVERGENCECTRL_ANCHOR
    ; CHECK: Entry intrinsic cannot be preceded by a convergent operation in the same basic block.
    ; CHECK: CONVERGENCECTRL_ENTRY
    %1:sgpr_64 = CONVERGENCECTRL_ENTRY
    ; CHECK: Loop intrinsic cannot be preceded by a convergent operation in the same basic block.
    ; CHECK: CONVERGENCECTRL_LOOP
    %2:sgpr_64 = CONVERGENCECTRL_LOOP %0:sgpr_64
    S_CBRANCH_EXECZ %bb.1, implicit $exec
    S_BRANCH %bb.2

  bb.1:
    successors: %bb.2;
    ; CHECK: Entry intrinsic can occur only in the entry block.
    ; CHECK: CONVERGENCECTRL_ENTRY
    %5:sgpr_64 = CONVERGENCECTRL_ENTRY

  bb.2:
    ; CHECK: Convergence control tokens can only be used by convergent operations.
    ; CHECK: G_PHI
    %6:sgpr_64 = G_PHI %0:sgpr_64, %bb.0, %0:sgpr_64, %bb.1
    %7:sgpr_64 = CONVERGENCECTRL_ANCHOR
    %8:sgpr_64 = IMPLICIT_DEF
    %4:sgpr_64 = SI_CALL %8:sgpr_64, 1, implicit %7:sgpr_64
    ; CHECK: An operation can use at most one convergence control token.
    ; CHECK: SI_CALL %{{[0-9]}}:sgpr_64, 2
    %9:sgpr_64 = SI_CALL %8:sgpr_64, 2, implicit %7:sgpr_64, implicit %7:sgpr_64
    ; CHECK: Cannot mix controlled and uncontrolled convergence in the same function.
    ; CHECK: SI_CALL %{{[0-9]}}:sgpr_64, 3
    %10:sgpr_64 = SI_CALL %8:sgpr_64, 3
...