llvm/test/Transforms/LoopVectorize/X86/invariant-load-gather.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=loop-vectorize -mattr=avx512f -S %s | FileCheck %s

target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

define i32 @inv_load_conditional(ptr %a, i64 %n, ptr %b, i32 %k) {
; CHECK-LABEL: @inv_load_conditional(
; CHECK-NEXT:  iter.check:
; CHECK-NEXT:    [[NTRUNC:%.*]] = trunc i64 [[N:%.*]] to i32
; CHECK-NEXT:    [[SMAX2:%.*]] = call i64 @llvm.smax.i64(i64 [[N]], i64 1)
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[SMAX2]], 8
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label [[VEC_EPILOG_SCALAR_PH:%.*]], label [[VECTOR_MEMCHECK:%.*]]
; CHECK:       vector.memcheck:
; CHECK-NEXT:    [[SMAX:%.*]] = call i64 @llvm.smax.i64(i64 [[N]], i64 1)
; CHECK-NEXT:    [[TMP0:%.*]] = shl i64 [[SMAX]], 2
; CHECK-NEXT:    [[SCEVGEP:%.*]] = getelementptr i8, ptr [[B:%.*]], i64 [[TMP0]]
; CHECK-NEXT:    [[SCEVGEP1:%.*]] = getelementptr i8, ptr [[A:%.*]], i64 4
; CHECK-NEXT:    [[BOUND0:%.*]] = icmp ult ptr [[B]], [[SCEVGEP1]]
; CHECK-NEXT:    [[BOUND1:%.*]] = icmp ult ptr [[A]], [[SCEVGEP]]
; CHECK-NEXT:    [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]]
; CHECK-NEXT:    br i1 [[FOUND_CONFLICT]], label [[VEC_EPILOG_SCALAR_PH]], label [[VECTOR_MAIN_LOOP_ITER_CHECK:%.*]]
; CHECK:       vector.main.loop.iter.check:
; CHECK-NEXT:    [[MIN_ITERS_CHECK3:%.*]] = icmp ult i64 [[SMAX2]], 16
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK3]], label [[VEC_EPILOG_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK:       vector.ph:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[SMAX2]], 16
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[SMAX2]], [[N_MOD_VF]]
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <16 x ptr> poison, ptr [[A]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <16 x ptr> [[BROADCAST_SPLATINSERT]], <16 x ptr> poison, <16 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP1:%.*]] = icmp ne <16 x ptr> [[BROADCAST_SPLAT]], zeroinitializer
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT4:%.*]] = insertelement <16 x i32> poison, i32 [[NTRUNC]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT5:%.*]] = shufflevector <16 x i32> [[BROADCAST_SPLATINSERT4]], <16 x i32> poison, <16 x i32> zeroinitializer
; CHECK-NEXT:    br label [[VECTOR_BODY:%.*]]
; CHECK:       vector.body:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDEX]]
; CHECK-NEXT:    store <16 x i32> [[BROADCAST_SPLAT5]], ptr [[TMP2]], align 4, !alias.scope [[META0:![0-9]+]], !noalias [[META3:![0-9]+]]
; CHECK-NEXT:    [[WIDE_MASKED_GATHER:%.*]] = call <16 x i32> @llvm.masked.gather.v16i32.v16p0(<16 x ptr> align 4 [[BROADCAST_SPLAT]], <16 x i1> [[TMP1]], <16 x i32> poison), !alias.scope [[META3]]
; CHECK-NEXT:    [[TMP9:%.*]] = extractelement <16 x i1> [[TMP1]], i32 0
; CHECK-NEXT:    [[PREDPHI:%.*]] = select i1 [[TMP9]], <16 x i32> [[WIDE_MASKED_GATHER]], <16 x i32> splat (i32 1)
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 16
; CHECK-NEXT:    [[TMP3:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP3]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK:       middle.block:
; CHECK-NEXT:    [[TMP4:%.*]] = extractelement <16 x i32> [[PREDPHI]], i32 15
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[SMAX2]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label [[FOR_END:%.*]], label [[VEC_EPILOG_ITER_CHECK:%.*]]
; CHECK:       vec.epilog.iter.check:
; CHECK-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_MOD_VF]], 8
; CHECK-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label [[VEC_EPILOG_SCALAR_PH]], label [[VEC_EPILOG_PH]], !prof [[PROF8:![0-9]+]]
; CHECK:       vec.epilog.ph:
; CHECK-NEXT:    [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; CHECK-NEXT:    [[N_MOD_VF6:%.*]] = urem i64 [[SMAX2]], 8
; CHECK-NEXT:    [[N_VEC7:%.*]] = sub i64 [[SMAX2]], [[N_MOD_VF6]]
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT8:%.*]] = insertelement <8 x ptr> poison, ptr [[A]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT9:%.*]] = shufflevector <8 x ptr> [[BROADCAST_SPLATINSERT8]], <8 x ptr> poison, <8 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP5:%.*]] = icmp ne <8 x ptr> [[BROADCAST_SPLAT9]], zeroinitializer
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT11:%.*]] = insertelement <8 x i32> poison, i32 [[NTRUNC]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT12:%.*]] = shufflevector <8 x i32> [[BROADCAST_SPLATINSERT11]], <8 x i32> poison, <8 x i32> zeroinitializer
; CHECK-NEXT:    br label [[VEC_EPILOG_VECTOR_BODY:%.*]]
; CHECK:       vec.epilog.vector.body:
; CHECK-NEXT:    [[INDEX10:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], [[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT15:%.*]], [[VEC_EPILOG_VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[INDEX10]]
; CHECK-NEXT:    store <8 x i32> [[BROADCAST_SPLAT12]], ptr [[TMP6]], align 4, !alias.scope [[META0]], !noalias [[META3]]
; CHECK-NEXT:    [[WIDE_MASKED_GATHER13:%.*]] = call <8 x i32> @llvm.masked.gather.v8i32.v8p0(<8 x ptr> align 4 [[BROADCAST_SPLAT9]], <8 x i1> [[TMP5]], <8 x i32> poison), !alias.scope [[META3]]
; CHECK-NEXT:    [[TMP10:%.*]] = extractelement <8 x i1> [[TMP5]], i32 0
; CHECK-NEXT:    [[PREDPHI14:%.*]] = select i1 [[TMP10]], <8 x i32> [[WIDE_MASKED_GATHER13]], <8 x i32> splat (i32 1)
; CHECK-NEXT:    [[INDEX_NEXT15]] = add nuw i64 [[INDEX10]], 8
; CHECK-NEXT:    [[TMP7:%.*]] = icmp eq i64 [[INDEX_NEXT15]], [[N_VEC7]]
; CHECK-NEXT:    br i1 [[TMP7]], label [[VEC_EPILOG_MIDDLE_BLOCK:%.*]], label [[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP9:![0-9]+]]
; CHECK:       vec.epilog.middle.block:
; CHECK-NEXT:    [[TMP8:%.*]] = extractelement <8 x i32> [[PREDPHI14]], i32 7
; CHECK-NEXT:    [[CMP_N16:%.*]] = icmp eq i64 [[SMAX2]], [[N_VEC7]]
; CHECK-NEXT:    br i1 [[CMP_N16]], label [[FOR_END]], label [[VEC_EPILOG_SCALAR_PH]]
; CHECK:       vec.epilog.scalar.ph:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC7]], [[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], [[VEC_EPILOG_ITER_CHECK]] ], [ 0, [[VECTOR_MEMCHECK]] ], [ 0, [[ITER_CHECK:%.*]] ]
; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
; CHECK:       for.body:
; CHECK-NEXT:    [[I:%.*]] = phi i64 [ [[I_NEXT:%.*]], [[LATCH:%.*]] ], [ [[BC_RESUME_VAL]], [[VEC_EPILOG_SCALAR_PH]] ]
; CHECK-NEXT:    [[I1:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[I]]
; CHECK-NEXT:    [[I2:%.*]] = load i32, ptr [[I1]], align 8
; CHECK-NEXT:    [[CMP:%.*]] = icmp ne ptr [[A]], null
; CHECK-NEXT:    store i32 [[NTRUNC]], ptr [[I1]], align 4
; CHECK-NEXT:    br i1 [[CMP]], label [[COND_LOAD:%.*]], label [[LATCH]]
; CHECK:       cond_load:
; CHECK-NEXT:    [[ALOAD:%.*]] = load i32, ptr [[A]], align 4
; CHECK-NEXT:    br label [[LATCH]]
; CHECK:       latch:
; CHECK-NEXT:    [[A_LCSSA:%.*]] = phi i32 [ [[ALOAD]], [[COND_LOAD]] ], [ 1, [[FOR_BODY]] ]
; CHECK-NEXT:    [[I_NEXT]] = add nuw nsw i64 [[I]], 1
; CHECK-NEXT:    [[COND:%.*]] = icmp slt i64 [[I_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[COND]], label [[FOR_BODY]], label [[FOR_END]], !llvm.loop [[LOOP10:![0-9]+]]
; CHECK:       for.end:
; CHECK-NEXT:    [[A_LCSSA_LCSSA:%.*]] = phi i32 [ [[A_LCSSA]], [[LATCH]] ], [ [[TMP4]], [[MIDDLE_BLOCK]] ], [ [[TMP8]], [[VEC_EPILOG_MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i32 [[A_LCSSA_LCSSA]]
;
entry:
  %ntrunc = trunc i64 %n to i32
  br label %for.body

for.body:                                         ; preds = %for.body, %entry
  %i = phi i64 [ %i.next, %latch ], [ 0, %entry ]
  %i1 = getelementptr inbounds i32, ptr %b, i64 %i
  %i2 = load i32, ptr %i1, align 8
  %cmp = icmp ne ptr %a, null
  store i32 %ntrunc, ptr %i1
  br i1 %cmp, label %cond_load, label %latch

cond_load:
  %aload = load i32, ptr %a, align 4
  br label %latch

latch:
  %a.lcssa = phi i32 [ %aload, %cond_load ], [ 1, %for.body ]
  %i.next = add nuw nsw i64 %i, 1
  %cond = icmp slt i64 %i.next, %n
  br i1 %cond, label %for.body, label %for.end

for.end:                                          ; preds = %for.body
  ret i32 %a.lcssa
}