test/Transforms/LoopVectorize/scev-predicate-reasoning.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --filter-out-after "scalar.ph:" --version 5
; RUN: opt -passes=loop-vectorize -force-vector-width=4 -force-vector-interleave=1 -lv-strided-pointer-ivs=true -S %s | FileCheck %s

define void @step_direction_unknown(i32 %arg, ptr %dst) {
; CHECK-LABEL: define void @step_direction_unknown(
; CHECK-SAME: i32 [[ARG:%.*]], ptr [[DST:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[ADD:%.*]] = add i32 [[ARG]], 1
; CHECK-NEXT:    br label %[[VECTOR_SCEVCHECK:.*]]
; CHECK:       [[VECTOR_SCEVCHECK]]:
; CHECK-NEXT:    [[TMP0:%.*]] = sub i32 -1, [[ARG]]
; CHECK-NEXT:    [[TMP1:%.*]] = icmp slt i32 [[ADD]], 0
; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], i32 [[TMP0]], i32 [[ADD]]
; CHECK-NEXT:    [[MUL1:%.*]] = call { i32, i1 } @llvm.umul.with.overflow.i32(i32 [[TMP2]], i32 1023)
; CHECK-NEXT:    [[MUL_RESULT:%.*]] = extractvalue { i32, i1 } [[MUL1]], 0
; CHECK-NEXT:    [[MUL_OVERFLOW:%.*]] = extractvalue { i32, i1 } [[MUL1]], 1
; CHECK-NEXT:    [[TMP3:%.*]] = sub i32 0, [[MUL_RESULT]]
; CHECK-NEXT:    [[TMP4:%.*]] = icmp ugt i32 [[TMP3]], 0
; CHECK-NEXT:    [[TMP5:%.*]] = select i1 [[TMP1]], i1 [[TMP4]], i1 false
; CHECK-NEXT:    [[TMP6:%.*]] = or i1 [[TMP5]], [[MUL_OVERFLOW]]
; CHECK-NEXT:    br i1 [[TMP6]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i32> poison, i32 [[ADD]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i32> [[BROADCAST_SPLATINSERT]], <4 x i32> poison, <4 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:    [[VEC_IND:%.*]] = phi <4 x i32> [ <i32 0, i32 1, i32 2, i32 3>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP8:%.*]] = mul <4 x i32> [[BROADCAST_SPLAT]], [[VEC_IND]]
; CHECK-NEXT:    [[TMP9:%.*]] = zext <4 x i32> [[TMP8]] to <4 x i64>
; CHECK-NEXT:    [[TMP10:%.*]] = extractelement <4 x i64> [[TMP9]], i32 0
; CHECK-NEXT:    [[TMP11:%.*]] = getelementptr double, ptr [[DST]], i64 [[TMP10]]
; CHECK-NEXT:    [[TMP12:%.*]] = extractelement <4 x i64> [[TMP9]], i32 1
; CHECK-NEXT:    [[TMP13:%.*]] = getelementptr double, ptr [[DST]], i64 [[TMP12]]
; CHECK-NEXT:    [[TMP14:%.*]] = extractelement <4 x i64> [[TMP9]], i32 2
; CHECK-NEXT:    [[TMP15:%.*]] = getelementptr double, ptr [[DST]], i64 [[TMP14]]
; CHECK-NEXT:    [[TMP16:%.*]] = extractelement <4 x i64> [[TMP9]], i32 3
; CHECK-NEXT:    [[TMP17:%.*]] = getelementptr double, ptr [[DST]], i64 [[TMP16]]
; CHECK-NEXT:    store double 0.000000e+00, ptr [[TMP11]], align 8
; CHECK-NEXT:    store double 0.000000e+00, ptr [[TMP13]], align 8
; CHECK-NEXT:    store double 0.000000e+00, ptr [[TMP15]], align 8
; CHECK-NEXT:    store double 0.000000e+00, ptr [[TMP17]], align 8
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[VEC_IND_NEXT]] = add <4 x i32> [[VEC_IND]], splat (i32 4)
; CHECK-NEXT:    [[TMP18:%.*]] = icmp eq i64 [[INDEX_NEXT]], 1024
; CHECK-NEXT:    br i1 [[TMP18]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br [[EXIT:label %.*]]
; CHECK:       [[SCALAR_PH]]:
;
entry:
  %add = add i32 %arg, 1
  br label %loop

loop:
  %phi = phi i64 [ 0, %entry ], [ %add2, %loop ]
  %trunc = trunc i64 %phi to i32
  %mul = mul i32 %add, %trunc
  %zext = zext i32 %mul to i64
  %getelementptr = getelementptr double, ptr %dst, i64 %zext
  store double 0.000000e+00, ptr %getelementptr, align 8
  %add2 = add i64 %phi, 1
  %icmp = icmp eq i64 %add2, 1024
  br i1 %icmp, label %exit, label %loop

exit:
  ret void
}

define void @integer_induction_wraps_scev_predicate_known(i32 %x, ptr %call, ptr %start) {
; CHECK-LABEL: define void @integer_induction_wraps_scev_predicate_known(
; CHECK-SAME: i32 [[X:%.*]], ptr [[CALL:%.*]], ptr [[START:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[MUL:%.*]] = shl i32 [[X]], 1
; CHECK-NEXT:    [[TMP0:%.*]] = sext i32 [[MUL]] to i64
; CHECK-NEXT:    br label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[TMP1:%.*]] = mul i64 992, [[TMP0]]
; CHECK-NEXT:    [[TMP2:%.*]] = getelementptr i8, ptr [[START]], i64 [[TMP1]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[POINTER_PHI:%.*]] = phi ptr [ [[START]], %[[VECTOR_PH]] ], [ [[PTR_IND:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[BROADCAST_SPLATINSERT:%.*]] = insertelement <4 x i64> poison, i64 [[TMP0]], i64 0
; CHECK-NEXT:    [[BROADCAST_SPLAT:%.*]] = shufflevector <4 x i64> [[BROADCAST_SPLATINSERT]], <4 x i64> poison, <4 x i32> zeroinitializer
; CHECK-NEXT:    [[TMP3:%.*]] = mul <4 x i64> <i64 0, i64 1, i64 2, i64 3>, [[BROADCAST_SPLAT]]
; CHECK-NEXT:    [[VECTOR_GEP:%.*]] = getelementptr i8, ptr [[POINTER_PHI]], <4 x i64> [[TMP3]]
; CHECK-NEXT:    [[DOTCAST:%.*]] = trunc i64 [[INDEX]] to i32
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = add i32 30, [[DOTCAST]]
; CHECK-NEXT:    [[TMP4:%.*]] = getelementptr ptr, ptr [[CALL]], i32 [[OFFSET_IDX]]
; CHECK-NEXT:    store <4 x ptr> [[VECTOR_GEP]], ptr [[TMP4]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP5:%.*]] = mul i64 [[TMP0]], 4
; CHECK-NEXT:    [[PTR_IND]] = getelementptr i8, ptr [[POINTER_PHI]], i64 [[TMP5]]
; CHECK-NEXT:    [[TMP6:%.*]] = icmp eq i64 [[INDEX_NEXT]], 992
; CHECK-NEXT:    br i1 [[TMP6]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br label %[[SCALAR_PH:.*]]
; CHECK:       [[SCALAR_PH]]:
;
entry:
  %mul = shl i32 %x, 1
  br label %for.cond

for.cond:                                         ; preds = %for.body, %entry
  %iv = phi i32 [ 30, %entry ], [ %inc, %for.cond ]
  %p.0 = phi ptr [ %start, %entry ], [ %add.ptr, %for.cond ]
  %add.ptr = getelementptr i8, ptr %p.0, i32 %mul
  %arrayidx = getelementptr ptr, ptr %call, i32 %iv
  store ptr %p.0, ptr %arrayidx, align 4
  %inc = add i32 %iv, 1
  %tobool.not = icmp eq i32 %iv, 1024
  br i1 %tobool.not, label %for.end, label %for.cond

for.end:                                          ; preds = %for.cond
  ret void
}

@h = global i64 0

define void @implied_wrap_predicate(ptr %A, ptr %B, ptr %C) {
; CHECK-LABEL: define void @implied_wrap_predicate(
; CHECK-SAME: ptr [[A:%.*]], ptr [[B:%.*]], ptr [[C:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[A3:%.*]] = ptrtoint ptr [[A]] to i64
; CHECK-NEXT:    [[C2:%.*]] = ptrtoint ptr [[C]] to i64
; CHECK-NEXT:    [[A1:%.*]] = ptrtoint ptr [[A]] to i64
; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[A3]], 16
; CHECK-NEXT:    [[UMAX4:%.*]] = call i64 @llvm.umax.i64(i64 [[TMP0]], i64 add (i64 ptrtoint (ptr @h to i64), i64 1))
; CHECK-NEXT:    [[TMP1:%.*]] = add i64 [[UMAX4]], -9
; CHECK-NEXT:    [[TMP2:%.*]] = sub i64 [[TMP1]], [[A3]]
; CHECK-NEXT:    [[TMP3:%.*]] = lshr i64 [[TMP2]], 3
; CHECK-NEXT:    [[TMP4:%.*]] = add nuw nsw i64 [[TMP3]], 1
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP4]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_SCEVCHECK:.*]]
; CHECK:       [[VECTOR_SCEVCHECK]]:
; CHECK-NEXT:    [[TMP5:%.*]] = add i64 [[A1]], 16
; CHECK-NEXT:    [[UMAX:%.*]] = call i64 @llvm.umax.i64(i64 [[TMP5]], i64 add (i64 ptrtoint (ptr @h to i64), i64 1))
; CHECK-NEXT:    [[TMP6:%.*]] = add i64 [[UMAX]], -9
; CHECK-NEXT:    [[TMP7:%.*]] = sub i64 [[TMP6]], [[A1]]
; CHECK-NEXT:    [[TMP8:%.*]] = lshr i64 [[TMP7]], 3
; CHECK-NEXT:    [[TMP9:%.*]] = trunc i64 [[TMP8]] to i16
; CHECK-NEXT:    [[TMP10:%.*]] = add i16 2, [[TMP9]]
; CHECK-NEXT:    [[TMP11:%.*]] = icmp ult i16 [[TMP10]], 2
; CHECK-NEXT:    [[TMP12:%.*]] = icmp ugt i64 [[TMP8]], 65535
; CHECK-NEXT:    [[TMP13:%.*]] = or i1 [[TMP11]], [[TMP12]]
; CHECK-NEXT:    br i1 [[TMP13]], label %[[SCALAR_PH]], label %[[VECTOR_MEMCHECK:.*]]
; CHECK:       [[VECTOR_MEMCHECK]]:
; CHECK-NEXT:    [[TMP14:%.*]] = sub i64 [[C2]], [[A3]]
; CHECK-NEXT:    [[DIFF_CHECK:%.*]] = icmp ult i64 [[TMP14]], 32
; CHECK-NEXT:    br i1 [[DIFF_CHECK]], label %[[SCALAR_PH]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[TMP4]], 4
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[TMP4]], [[N_MOD_VF]]
; CHECK-NEXT:    [[DOTCAST:%.*]] = trunc i64 [[N_VEC]] to i16
; CHECK-NEXT:    [[TMP15:%.*]] = add i16 1, [[DOTCAST]]
; CHECK-NEXT:    [[TMP16:%.*]] = add i64 1, [[N_VEC]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[OFFSET_IDX:%.*]] = add i64 1, [[INDEX]]
; CHECK-NEXT:    [[TMP17:%.*]] = getelementptr i64, ptr [[A]], i64 [[OFFSET_IDX]]
; CHECK-NEXT:    store <4 x i64> zeroinitializer, ptr [[TMP17]], align 4
; CHECK-NEXT:    [[TMP18:%.*]] = getelementptr i64, ptr [[C]], i64 [[OFFSET_IDX]]
; CHECK-NEXT:    store <4 x i64> zeroinitializer, ptr [[TMP18]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP19:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP19]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP6:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[TMP4]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], [[EXIT:label %.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
;
entry:
  br label %loop

loop:
  %iv = phi i16 [ 1, %entry ], [ %iv.next, %loop ]
  %iv.ext = phi i64 [ 1, %entry ], [ %iv.ext.next, %loop ]
  %gep.A = getelementptr i64, ptr %A, i64 %iv.ext
  store i64 0, ptr %gep.A
  %gep.C = getelementptr i64, ptr %C, i64 %iv.ext
  store i64 0, ptr %gep.C
  %iv.next = add i16 %iv, 1
  %iv.ext.next = zext i16 %iv.next to i64
  %gep = getelementptr i64, ptr %A, i64 %iv.ext.next
  %cmp = icmp ugt ptr %gep, @h
  br i1 %cmp, label %exit, label %loop

exit:
  ret void
}

declare i1 @cond()

; Test case for https://github.com/llvm/llvm-project/issues/131281.
; %add2 is known to not wrap via BTC.
define void @no_signed_wrap_iv_via_btc(ptr %dst, i32 %N) mustprogress {
; CHECK-LABEL: define void @no_signed_wrap_iv_via_btc(
; CHECK-SAME: ptr [[DST:%.*]], i32 [[N:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[SUB:%.*]] = add i32 [[N]], -100
; CHECK-NEXT:    [[SUB4:%.*]] = add i32 [[N]], -99
; CHECK-NEXT:    [[TMP0:%.*]] = add i32 [[N]], 1
; CHECK-NEXT:    [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[SUB4]], i32 [[TMP0]])
; CHECK-NEXT:    [[TMP1:%.*]] = add i32 [[SMAX]], 100
; CHECK-NEXT:    [[TMP2:%.*]] = sub i32 [[TMP1]], [[N]]
; CHECK-NEXT:    br label %[[OUTER:.*]]
; CHECK:       [[OUTER_LOOPEXIT:.*]]:
; CHECK-NEXT:    br label %[[OUTER]]
; CHECK:       [[OUTER]]:
; CHECK-NEXT:    [[C:%.*]] = call i1 @cond()
; CHECK-NEXT:    br i1 [[C]], label %[[LOOP_PREHEADER:.*]], [[EXIT:label %.*]]
; CHECK:       [[LOOP_PREHEADER]]:
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[TMP2]], 4
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i32 [[TMP2]], 4
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i32 [[TMP2]], [[N_MOD_VF]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i32 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP3:%.*]] = add i32 [[SUB4]], [[INDEX]]
; CHECK-NEXT:    [[TMP4:%.*]] = sext i32 [[TMP3]] to i64
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr i32, ptr [[DST]], i64 [[TMP4]]
; CHECK-NEXT:    store <4 x i32> zeroinitializer, ptr [[TMP5]], align 4
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 4
; CHECK-NEXT:    [[TMP6:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP6]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i32 [[TMP2]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[OUTER_LOOPEXIT]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
;
entry:
  %sub = add i32 %N, -100
  %sub4 = add i32 %N, -99
  br label %outer

outer:
  %c = call i1 @cond()
  br i1 %c, label %loop, label %exit

loop:
  %iv = phi i32 [ 0, %outer ], [ %inc, %loop ]
  %add2 = add i32 %sub4, %iv
  %add.ext = sext i32 %add2 to i64
  %gep.dst = getelementptr i32, ptr %dst, i64 %add.ext
  store i32 0, ptr %gep.dst, align 4
  %inc = add i32 %iv, 1
  %add = add i32 %sub, %inc
  %ec = icmp sgt i32 %add, %N
  br i1 %ec, label %outer, label %loop

exit:
  ret void
}