llvm/test/CodeGen/AMDGPU/atomic_optimization_split_dt_update.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt -mtriple=amdgcn-- -mcpu=gfx908 -passes="amdgpu-atomic-optimizer,verify<domtree>" %s -S -o - | FileCheck %s

; Check we're properly adding an edge from ComputeEnd to the "End" block added by
; SplitBlockAndInsertIfThen
;
; If the edge is not added, domtree verification will fail.

declare i32 @quux()

define amdgpu_kernel void @ham(ptr addrspace(4) %arg) {
; CHECK-LABEL: define amdgpu_kernel void @ham(
; CHECK-SAME: ptr addrspace(4) [[ARG:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  bb:
; CHECK-NEXT:    [[CALL:%.*]] = tail call i32 @quux()
; CHECK-NEXT:    [[ICMP:%.*]] = icmp eq i32 [[CALL]], 0
; CHECK-NEXT:    br i1 [[ICMP]], label [[BB1:%.*]], label [[BB3:%.*]]
; CHECK:       bb1:
; CHECK-NEXT:    [[CALL2:%.*]] = tail call i32 @quux()
; CHECK-NEXT:    br label [[BB3]]
; CHECK:       bb3:
; CHECK-NEXT:    [[PHI:%.*]] = phi i32 [ [[CALL2]], [[BB1]] ], [ [[CALL]], [[BB:%.*]] ]
; CHECK-NEXT:    br label [[BB4:%.*]]
; CHECK:       bb4:
; CHECK-NEXT:    [[CALL5:%.*]] = tail call i32 @quux()
; CHECK-NEXT:    [[ICMP6:%.*]] = icmp eq i32 [[CALL5]], 0
; CHECK-NEXT:    br i1 [[ICMP6]], label [[BB8:%.*]], label [[BB7:%.*]]
; CHECK:       bb7:
; CHECK-NEXT:    [[LOAD:%.*]] = load ptr, ptr addrspace(4) [[ARG]], align 8
; CHECK-NEXT:    [[ADDRSPACECAST:%.*]] = addrspacecast ptr [[LOAD]] to ptr addrspace(1)
; CHECK-NEXT:    [[TMP0:%.*]] = call i64 @llvm.amdgcn.ballot.i64(i1 true)
; CHECK-NEXT:    [[TMP1:%.*]] = trunc i64 [[TMP0]] to i32
; CHECK-NEXT:    [[TMP2:%.*]] = lshr i64 [[TMP0]], 32
; CHECK-NEXT:    [[TMP3:%.*]] = trunc i64 [[TMP2]] to i32
; CHECK-NEXT:    [[TMP4:%.*]] = call i32 @llvm.amdgcn.mbcnt.lo(i32 [[TMP1]], i32 0)
; CHECK-NEXT:    [[TMP5:%.*]] = call i32 @llvm.amdgcn.mbcnt.hi(i32 [[TMP3]], i32 [[TMP4]])
; CHECK-NEXT:    [[TMP6:%.*]] = call i64 @llvm.amdgcn.ballot.i64(i1 true)
; CHECK-NEXT:    br label [[COMPUTELOOP:%.*]]
; CHECK:       7:
; CHECK-NEXT:    [[TMP8:%.*]] = atomicrmw add ptr addrspace(1) [[ADDRSPACECAST]], i32 [[TMP13:%.*]] syncscope("agent-one-as") monotonic, align 4
; CHECK-NEXT:    br label [[TMP9:%.*]]
; CHECK:       9:
; CHECK-NEXT:    br label [[BB8]]
; CHECK:       bb8:
; CHECK-NEXT:    br label [[BB4]]
; CHECK:       ComputeLoop:
; CHECK-NEXT:    [[ACCUMULATOR:%.*]] = phi i32 [ 0, [[BB7]] ], [ [[TMP13]], [[COMPUTELOOP]] ]
; CHECK-NEXT:    [[ACTIVEBITS:%.*]] = phi i64 [ [[TMP6]], [[BB7]] ], [ [[TMP16:%.*]], [[COMPUTELOOP]] ]
; CHECK-NEXT:    [[TMP10:%.*]] = call i64 @llvm.cttz.i64(i64 [[ACTIVEBITS]], i1 true)
; CHECK-NEXT:    [[TMP11:%.*]] = trunc i64 [[TMP10]] to i32
; CHECK-NEXT:    [[TMP12:%.*]] = call i32 @llvm.amdgcn.readlane.i32(i32 [[PHI]], i32 [[TMP11]])
; CHECK-NEXT:    [[TMP13]] = add i32 [[ACCUMULATOR]], [[TMP12]]
; CHECK-NEXT:    [[TMP14:%.*]] = shl i64 1, [[TMP10]]
; CHECK-NEXT:    [[TMP15:%.*]] = xor i64 [[TMP14]], -1
; CHECK-NEXT:    [[TMP16]] = and i64 [[ACTIVEBITS]], [[TMP15]]
; CHECK-NEXT:    [[TMP17:%.*]] = icmp eq i64 [[TMP16]], 0
; CHECK-NEXT:    br i1 [[TMP17]], label [[COMPUTEEND:%.*]], label [[COMPUTELOOP]]
; CHECK:       ComputeEnd:
; CHECK-NEXT:    [[TMP18:%.*]] = icmp eq i32 [[TMP5]], 0
; CHECK-NEXT:    br i1 [[TMP18]], label [[TMP7:%.*]], label [[TMP9]]
;
bb:
  %call = tail call i32 @quux()
  %icmp = icmp eq i32 %call, 0
  br i1 %icmp, label %bb1, label %bb3

bb1:                                              ; preds = %bb
  %call2 = tail call i32 @quux()
  br label %bb3

bb3:                                              ; preds = %bb1, %bb
  %phi = phi i32 [ %call2, %bb1 ], [ %call, %bb ]
  br label %bb4

bb4:                                              ; preds = %bb8, %bb3
  %call5 = tail call i32 @quux()
  %icmp6 = icmp eq i32 %call5, 0
  br i1 %icmp6, label %bb8, label %bb7

bb7:                                              ; preds = %bb4
  %load = load ptr, ptr addrspace(4) %arg, align 8
  %addrspacecast = addrspacecast ptr %load to ptr addrspace(1)
  %atomicrmw = atomicrmw add ptr addrspace(1) %addrspacecast, i32 %phi syncscope("agent-one-as") monotonic, align 4
  br label %bb8

bb8:                                              ; preds = %bb7, %bb4
  br label %bb4
}