llvm/test/Transforms/IndVarSimplify/skip-predication-convergence.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=indvars -indvars-predicate-loops=1 -S | FileCheck %s

; Loop with body using loop convergence token should be skipped by IndVarSimplify.

declare token @llvm.experimental.convergence.entry() #0

define void @loop(i32 %tid, ptr %array) #0 {
; CHECK-LABEL: @loop(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = tail call token @llvm.experimental.convergence.entry()
; CHECK-NEXT:    br label [[FOR_COND_I:%.*]]
; CHECK:       for.cond.i:
; CHECK-NEXT:    [[I_0_I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC_I:%.*]], [[FOR_BODY_I:%.*]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = call token @llvm.experimental.convergence.loop() [ "convergencectrl"(token [[TMP0]]) ]
; CHECK-NEXT:    [[CMP_I:%.*]] = icmp samesign ult i32 [[I_0_I]], 8
; CHECK-NEXT:    br i1 [[CMP_I]], label [[FOR_BODY_I]], label [[EXIT_LOOPEXIT:%.*]]
; CHECK:       for.body.i:
; CHECK-NEXT:    [[CMP1_I:%.*]] = icmp eq i32 [[I_0_I]], [[TID:%.*]]
; CHECK-NEXT:    [[INC_I]] = add nuw nsw i32 [[I_0_I]], 1
; CHECK-NEXT:    br i1 [[CMP1_I]], label [[IF_THEN_I:%.*]], label [[FOR_COND_I]]
; CHECK:       exit.loopexit:
; CHECK-NEXT:    br label [[EXIT:%.*]]
; CHECK:       if.then.i:
; CHECK-NEXT:    [[HLSL_WAVE_ACTIVE_MAX2_I:%.*]] = call spir_func i32 @llvm.spv.wave.reduce.umax.i32(i32 [[TID]]) [ "convergencectrl"(token [[TMP1]]) ]
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds i32, ptr [[ARRAY:%.*]], i32 [[TID]]
; CHECK-NEXT:    store i32 [[HLSL_WAVE_ACTIVE_MAX2_I]], ptr [[TMP2]], align 4
; CHECK-NEXT:    br label [[EXIT]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  %0 = tail call token @llvm.experimental.convergence.entry()
  br label %for.cond.i

for.cond.i:
  %i.0.i = phi i32 [ 0, %entry ], [ %inc.i, %for.body.i ]
  %2 = call token @llvm.experimental.convergence.loop() [ "convergencectrl"(token %0) ]
  %cmp.i = icmp ult i32 %i.0.i, 8
  br i1 %cmp.i, label %for.body.i, label %exit.loopexit

for.body.i:
  %cmp1.i = icmp eq i32 %i.0.i, %tid
  %inc.i = add nuw nsw i32 %i.0.i, 1
  br i1 %cmp1.i, label %if.then.i, label %for.cond.i

exit.loopexit:
  br label %exit

if.then.i:
  %hlsl.wave.active.max2.i = call spir_func i32 @llvm.spv.wave.reduce.umax.i32(i32 %tid) [ "convergencectrl"(token %2) ]
  %3 = getelementptr inbounds i32, ptr %array, i32 %tid
  store i32 %hlsl.wave.active.max2.i, ptr %3, align 4
  br label %exit

exit:
  ret void
}

declare token @llvm.experimental.convergence.loop() #0

declare i32 @llvm.spv.wave.reduce.umax.i32(i32) #0

attributes #0 = { convergent }