; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 5
; RUN: opt -passes=loop-vectorize -mcpu=core-avx2 -mtriple=x86_64-unknown-linux-gnu -S %s | FileCheck --check-prefix AUTO_VEC %s

target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"

; This test checks auto-vectorization with FP induction variable.
; FMF is required on the IR instructions.

;void fp_iv_loop1(ptr __restrict__ A, int N) {
;  float x = 1.0;
;  for (int i=0; i < N; ++i) {
;    A[i] = x;
;    x += 0.5;
;  }
;}

define void @fp_iv_loop1(ptr noalias nocapture %A, i32 %N) #0 {
; AUTO_VEC-LABEL: define void @fp_iv_loop1(
; AUTO_VEC-SAME: ptr noalias captures(none) [[A:%.*]], i32 [[N:%.*]]) #[[ATTR0:[0-9]+]] {
; AUTO_VEC-NEXT:  [[ENTRY:.*:]]
; AUTO_VEC-NEXT:    [[CMP4:%.*]] = icmp sgt i32 [[N]], 0
; AUTO_VEC-NEXT:    br i1 [[CMP4]], label %[[ITER_CHECK:.*]], label %[[FOR_END:.*]]
; AUTO_VEC:       [[ITER_CHECK]]:
; AUTO_VEC-NEXT:    [[TMP0:%.*]] = zext i32 [[N]] to i64
; AUTO_VEC-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP0]], 4
; AUTO_VEC-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[FOR_BODY:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; AUTO_VEC:       [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; AUTO_VEC-NEXT:    [[MIN_ITERS_CHECK1:%.*]] = icmp ult i64 [[TMP0]], 32
; AUTO_VEC-NEXT:    br i1 [[MIN_ITERS_CHECK1]], label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; AUTO_VEC:       [[VECTOR_PH]]:
; AUTO_VEC-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[TMP0]], 32
; AUTO_VEC-NEXT:    [[N_VEC:%.*]] = sub i64 [[TMP0]], [[N_MOD_VF]]
; AUTO_VEC-NEXT:    [[DOTCAST:%.*]] = sitofp i64 [[N_VEC]] to float
; AUTO_VEC-NEXT:    [[TMP6:%.*]] = fmul fast float 5.000000e-01, [[DOTCAST]]
; AUTO_VEC-NEXT:    [[IND_END:%.*]] = fadd fast float 1.000000e+00, [[TMP6]]
; AUTO_VEC-NEXT:    br label %[[VECTOR_BODY:.*]]
; AUTO_VEC:       [[VECTOR_BODY]]:
; AUTO_VEC-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; AUTO_VEC-NEXT:    [[VEC_IND:%.*]] = phi <8 x float> [ <float 1.000000e+00, float 1.500000e+00, float 2.000000e+00, float 2.500000e+00, float 3.000000e+00, float 3.500000e+00, float 4.000000e+00, float 4.500000e+00>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
; AUTO_VEC-NEXT:    [[STEP_ADD:%.*]] = fadd fast <8 x float> [[VEC_IND]], splat (float 4.000000e+00)
; AUTO_VEC-NEXT:    [[STEP_ADD2:%.*]] = fadd fast <8 x float> [[STEP_ADD]], splat (float 4.000000e+00)
; AUTO_VEC-NEXT:    [[STEP_ADD3:%.*]] = fadd fast <8 x float> [[STEP_ADD2]], splat (float 4.000000e+00)
; AUTO_VEC-NEXT:    [[TMP1:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[INDEX]]
; AUTO_VEC-NEXT:    [[TMP2:%.*]] = getelementptr inbounds float, ptr [[TMP1]], i32 8
; AUTO_VEC-NEXT:    [[TMP3:%.*]] = getelementptr inbounds float, ptr [[TMP1]], i32 16
; AUTO_VEC-NEXT:    [[TMP4:%.*]] = getelementptr inbounds float, ptr [[TMP1]], i32 24
; AUTO_VEC-NEXT:    store <8 x float> [[VEC_IND]], ptr [[TMP1]], align 4
; AUTO_VEC-NEXT:    store <8 x float> [[STEP_ADD]], ptr [[TMP2]], align 4
; AUTO_VEC-NEXT:    store <8 x float> [[STEP_ADD2]], ptr [[TMP3]], align 4
; AUTO_VEC-NEXT:    store <8 x float> [[STEP_ADD3]], ptr [[TMP4]], align 4
; AUTO_VEC-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 32
; AUTO_VEC-NEXT:    [[VEC_IND_NEXT]] = fadd fast <8 x float> [[STEP_ADD3]], splat (float 4.000000e+00)
; AUTO_VEC-NEXT:    [[TMP5:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; AUTO_VEC-NEXT:    br i1 [[TMP5]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; AUTO_VEC:       [[MIDDLE_BLOCK]]:
; AUTO_VEC-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[TMP0]], [[N_VEC]]
; AUTO_VEC-NEXT:    br i1 [[CMP_N]], label %[[FOR_END_LOOPEXIT:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; AUTO_VEC:       [[VEC_EPILOG_ITER_CHECK]]:
; AUTO_VEC-NEXT:    [[DOTCAST12:%.*]] = sitofp i64 [[N_VEC]] to float
; AUTO_VEC-NEXT:    [[TMP11:%.*]] = fmul fast float 5.000000e-01, [[DOTCAST12]]
; AUTO_VEC-NEXT:    [[IND_END1:%.*]] = fadd fast float 1.000000e+00, [[TMP11]]
; AUTO_VEC-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_MOD_VF]], 4
; AUTO_VEC-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[FOR_BODY]], label %[[VEC_EPILOG_PH]], !prof [[PROF3:![0-9]+]]
; AUTO_VEC:       [[VEC_EPILOG_PH]]:
; AUTO_VEC-NEXT:    [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; AUTO_VEC-NEXT:    [[BC_RESUME_VAL:%.*]] = phi float [ [[IND_END]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 1.000000e+00, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; AUTO_VEC-NEXT:    [[N_MOD_VF2:%.*]] = urem i64 [[TMP0]], 4
; AUTO_VEC-NEXT:    [[N_VEC3:%.*]] = sub i64 [[TMP0]], [[N_MOD_VF2]]
; AUTO_VEC-NEXT:    [[DOTCAST4:%.*]] = sitofp i64 [[N_VEC3]] to float
; AUTO_VEC-NEXT:    [[TMP12:%.*]] = fmul fast float 5.000000e-01, [[DOTCAST4]]
; AUTO_VEC-NEXT:    [[TMP10:%.*]] = fadd fast float 1.000000e+00, [[TMP12]]
; AUTO_VEC-NEXT:    [[DOTSPLATINSERT:%.*]] = insertelement <4 x float> poison, float [[BC_RESUME_VAL]], i64 0
; AUTO_VEC-NEXT:    [[DOTSPLAT:%.*]] = shufflevector <4 x float> [[DOTSPLATINSERT]], <4 x float> poison, <4 x i32> zeroinitializer
; AUTO_VEC-NEXT:    [[INDUCTION:%.*]] = fadd fast <4 x float> [[DOTSPLAT]], <float 0.000000e+00, float 5.000000e-01, float 1.000000e+00, float 1.500000e+00>
; AUTO_VEC-NEXT:    br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; AUTO_VEC:       [[VEC_EPILOG_VECTOR_BODY]]:
; AUTO_VEC-NEXT:    [[INDEX10:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], %[[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT13:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; AUTO_VEC-NEXT:    [[VEC_IND11:%.*]] = phi <4 x float> [ [[INDUCTION]], %[[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT12:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; AUTO_VEC-NEXT:    [[TMP8:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[INDEX10]]
; AUTO_VEC-NEXT:    store <4 x float> [[VEC_IND11]], ptr [[TMP8]], align 4
; AUTO_VEC-NEXT:    [[INDEX_NEXT13]] = add nuw i64 [[INDEX10]], 4
; AUTO_VEC-NEXT:    [[VEC_IND_NEXT12]] = fadd fast <4 x float> [[VEC_IND11]], splat (float 2.000000e+00)
; AUTO_VEC-NEXT:    [[TMP9:%.*]] = icmp eq i64 [[INDEX_NEXT13]], [[N_VEC3]]
; AUTO_VEC-NEXT:    br i1 [[TMP9]], label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]], label %[[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; AUTO_VEC:       [[VEC_EPILOG_MIDDLE_BLOCK]]:
; AUTO_VEC-NEXT:    [[CMP_N9:%.*]] = icmp eq i64 [[TMP0]], [[N_VEC3]]
; AUTO_VEC-NEXT:    br i1 [[CMP_N9]], label %[[FOR_END_LOOPEXIT]], label %[[FOR_BODY]]
; AUTO_VEC:       [[FOR_BODY]]:
; AUTO_VEC-NEXT:    [[BC_RESUME_VAL10:%.*]] = phi i64 [ [[N_VEC3]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; AUTO_VEC-NEXT:    [[BC_RESUME_VAL11:%.*]] = phi float [ [[TMP10]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[IND_END1]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 1.000000e+00, %[[ITER_CHECK]] ]
; AUTO_VEC-NEXT:    br label %[[LOOP:.*]]
; AUTO_VEC:       [[LOOP]]:
; AUTO_VEC-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], %[[LOOP]] ], [ [[BC_RESUME_VAL10]], %[[FOR_BODY]] ]
; AUTO_VEC-NEXT:    [[X_06:%.*]] = phi float [ [[CONV1:%.*]], %[[LOOP]] ], [ [[BC_RESUME_VAL11]], %[[FOR_BODY]] ]
; AUTO_VEC-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[INDVARS_IV]]
; AUTO_VEC-NEXT:    store float [[X_06]], ptr [[ARRAYIDX]], align 4
; AUTO_VEC-NEXT:    [[CONV1]] = fadd fast float [[X_06]], 5.000000e-01
; AUTO_VEC-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; AUTO_VEC-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT]] to i32
; AUTO_VEC-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], [[N]]
; AUTO_VEC-NEXT:    br i1 [[EXITCOND]], label %[[FOR_END_LOOPEXIT]], label %[[LOOP]], !llvm.loop [[LOOP5:![0-9]+]]
; AUTO_VEC:       [[FOR_END_LOOPEXIT]]:
; AUTO_VEC-NEXT:    br label %[[FOR_END]]
; AUTO_VEC:       [[FOR_END]]:
; AUTO_VEC-NEXT:    ret void
;
entry:
  %cmp4 = icmp sgt i32 %N, 0
  br i1 %cmp4, label %loop.preheader, label %for.end

loop.preheader:                               ; preds = %entry
  br label %loop

loop:                                         ; preds = %loop.preheader, %loop
  %iv = phi i64 [ %iv.next, %loop ], [ 0, %loop.preheader ]
  %x.06 = phi float [ %conv1, %loop ], [ 1.000000e+00, %loop.preheader ]
  %arrayidx = getelementptr inbounds float, ptr %A, i64 %iv
  store float %x.06, ptr %arrayidx, align 4
  %conv1 = fadd fast float %x.06, 5.000000e-01
  %iv.next = add nuw nsw i64 %iv, 1
  %lftr.wideiv = trunc i64 %iv.next to i32
  %exitcond = icmp eq i32 %lftr.wideiv, %N
  br i1 %exitcond, label %for.end.loopexit, label %loop

for.end.loopexit:                                 ; preds = %loop
  br label %for.end

for.end:                                          ; preds = %for.end.loopexit, %entry
  ret void
}

; The same as the previous, but FP operation has no FMF.
; Vectorization should be rejected.
;void fp_iv_loop2(ptr __restrict__ A, int N) {
;  float x = 1.0;
;  for (int i=0; i < N; ++i) {
;    A[i] = x;
;    x += 0.5;
;  }
;}

define void @fp_iv_loop2(ptr noalias nocapture %A, i32 %N) {
; AUTO_VEC-LABEL: define void @fp_iv_loop2(
; AUTO_VEC-SAME: ptr noalias captures(none) [[A:%.*]], i32 [[N:%.*]]) #[[ATTR0]] {
; AUTO_VEC-NEXT:  [[ENTRY:.*:]]
; AUTO_VEC-NEXT:    [[CMP4:%.*]] = icmp sgt i32 [[N]], 0
; AUTO_VEC-NEXT:    br i1 [[CMP4]], label %[[FOR_BODY_PREHEADER:.*]], label %[[FOR_END:.*]]
; AUTO_VEC:       [[FOR_BODY_PREHEADER]]:
; AUTO_VEC-NEXT:    br label %[[FOR_BODY:.*]]
; AUTO_VEC:       [[FOR_BODY]]:
; AUTO_VEC-NEXT:    [[INDVARS_IV_EPIL:%.*]] = phi i64 [ [[INDVARS_IV_NEXT_EPIL:%.*]], %[[FOR_BODY]] ], [ 0, %[[FOR_BODY_PREHEADER]] ]
; AUTO_VEC-NEXT:    [[X_06_EPIL:%.*]] = phi float [ [[CONV1_EPIL:%.*]], %[[FOR_BODY]] ], [ 1.000000e+00, %[[FOR_BODY_PREHEADER]] ]
; AUTO_VEC-NEXT:    [[ARRAYIDX_EPIL:%.*]] = getelementptr inbounds float, ptr [[A]], i64 [[INDVARS_IV_EPIL]]
; AUTO_VEC-NEXT:    store float [[X_06_EPIL]], ptr [[ARRAYIDX_EPIL]], align 4
; AUTO_VEC-NEXT:    [[CONV1_EPIL]] = fadd float [[X_06_EPIL]], 5.000000e-01
; AUTO_VEC-NEXT:    [[INDVARS_IV_NEXT_EPIL]] = add nuw nsw i64 [[INDVARS_IV_EPIL]], 1
; AUTO_VEC-NEXT:    [[LFTR_WIDEIV:%.*]] = trunc i64 [[INDVARS_IV_NEXT_EPIL]] to i32
; AUTO_VEC-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[LFTR_WIDEIV]], [[N]]
; AUTO_VEC-NEXT:    br i1 [[EXITCOND]], label %[[FOR_END_LOOPEXIT:.*]], label %[[FOR_BODY]]
; AUTO_VEC:       [[FOR_END_LOOPEXIT]]:
; AUTO_VEC-NEXT:    br label %[[FOR_END]]
; AUTO_VEC:       [[FOR_END]]:
; AUTO_VEC-NEXT:    ret void
;
entry:
  %cmp4 = icmp sgt i32 %N, 0
  br i1 %cmp4, label %loop.preheader, label %for.end

loop.preheader:                               ; preds = %entry
  br label %loop

loop:                                         ; preds = %loop.preheader, %loop
  %iv = phi i64 [ %iv.next, %loop ], [ 0, %loop.preheader ]
  %x.06 = phi float [ %conv1, %loop ], [ 1.000000e+00, %loop.preheader ]
  %arrayidx = getelementptr inbounds float, ptr %A, i64 %iv
  store float %x.06, ptr %arrayidx, align 4
  %conv1 = fadd float %x.06, 5.000000e-01
  %iv.next = add nuw nsw i64 %iv, 1
  %lftr.wideiv = trunc i64 %iv.next to i32
  %exitcond = icmp eq i32 %lftr.wideiv, %N
  br i1 %exitcond, label %for.end.loopexit, label %loop

for.end.loopexit:                                 ; preds = %loop
  br label %for.end

for.end:                                          ; preds = %for.end.loopexit, %entry
  ret void
}

define double @external_use_with_fast_math(ptr %a, i64 %n) {
; AUTO_VEC-LABEL: define double @external_use_with_fast_math(
; AUTO_VEC-SAME: ptr [[A:%.*]], i64 [[N:%.*]]) #[[ATTR0]] {
; AUTO_VEC-NEXT:  [[ENTRY:.*]]:
; AUTO_VEC-NEXT:    [[SMAX:%.*]] = call i64 @llvm.smax.i64(i64 [[N]], i64 1)
; AUTO_VEC-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[SMAX]], 16
; AUTO_VEC-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[FOR_BODY:.*]], label %[[VECTOR_PH:.*]]
; AUTO_VEC:       [[VECTOR_PH]]:
; AUTO_VEC-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[SMAX]], 16
; AUTO_VEC-NEXT:    [[N_VEC:%.*]] = sub i64 [[SMAX]], [[N_MOD_VF]]
; AUTO_VEC-NEXT:    [[DOTCAST:%.*]] = sitofp i64 [[N_VEC]] to double
; AUTO_VEC-NEXT:    [[TMP0:%.*]] = fmul fast double 3.000000e+00, [[DOTCAST]]
; AUTO_VEC-NEXT:    [[TMP6:%.*]] = fadd fast double 0.000000e+00, [[TMP0]]
; AUTO_VEC-NEXT:    br label %[[VECTOR_BODY:.*]]
; AUTO_VEC:       [[VECTOR_BODY]]:
; AUTO_VEC-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; AUTO_VEC-NEXT:    [[VEC_IND:%.*]] = phi <4 x double> [ <double 0.000000e+00, double 3.000000e+00, double 6.000000e+00, double 9.000000e+00>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
; AUTO_VEC-NEXT:    [[STEP_ADD:%.*]] = fadd fast <4 x double> [[VEC_IND]], splat (double 1.200000e+01)
; AUTO_VEC-NEXT:    [[STEP_ADD_2:%.*]] = fadd fast <4 x double> [[STEP_ADD]], splat (double 1.200000e+01)
; AUTO_VEC-NEXT:    [[STEP_ADD_3:%.*]] = fadd fast <4 x double> [[STEP_ADD_2]], splat (double 1.200000e+01)
; AUTO_VEC-NEXT:    [[TMP1:%.*]] = getelementptr double, ptr [[A]], i64 [[INDEX]]
; AUTO_VEC-NEXT:    [[TMP2:%.*]] = getelementptr double, ptr [[TMP1]], i32 4
; AUTO_VEC-NEXT:    [[TMP3:%.*]] = getelementptr double, ptr [[TMP1]], i32 8
; AUTO_VEC-NEXT:    [[TMP4:%.*]] = getelementptr double, ptr [[TMP1]], i32 12
; AUTO_VEC-NEXT:    store <4 x double> [[VEC_IND]], ptr [[TMP1]], align 8
; AUTO_VEC-NEXT:    store <4 x double> [[STEP_ADD]], ptr [[TMP2]], align 8
; AUTO_VEC-NEXT:    store <4 x double> [[STEP_ADD_2]], ptr [[TMP3]], align 8
; AUTO_VEC-NEXT:    store <4 x double> [[STEP_ADD_3]], ptr [[TMP4]], align 8
; AUTO_VEC-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 16
; AUTO_VEC-NEXT:    [[VEC_IND_NEXT]] = fadd fast <4 x double> [[STEP_ADD_3]], splat (double 1.200000e+01)
; AUTO_VEC-NEXT:    [[TMP5:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; AUTO_VEC-NEXT:    br i1 [[TMP5]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP6:![0-9]+]]
; AUTO_VEC:       [[MIDDLE_BLOCK]]:
; AUTO_VEC-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[SMAX]], [[N_VEC]]
; AUTO_VEC-NEXT:    [[TMP7:%.*]] = fsub fast double [[TMP6]], 3.000000e+00
; AUTO_VEC-NEXT:    br i1 [[CMP_N]], label %[[FOR_END:.*]], label %[[FOR_BODY]]
; AUTO_VEC:       [[FOR_BODY]]:
; AUTO_VEC-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; AUTO_VEC-NEXT:    [[BC_RESUME_VAL1:%.*]] = phi double [ [[TMP6]], %[[MIDDLE_BLOCK]] ], [ 0.000000e+00, %[[ENTRY]] ]
; AUTO_VEC-NEXT:    br label %[[LOOP:.*]]
; AUTO_VEC:       [[LOOP]]:
; AUTO_VEC-NEXT:    [[I:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[FOR_BODY]] ], [ [[I_NEXT:%.*]], %[[LOOP]] ]
; AUTO_VEC-NEXT:    [[J:%.*]] = phi double [ [[BC_RESUME_VAL1]], %[[FOR_BODY]] ], [ [[J_NEXT:%.*]], %[[LOOP]] ]
; AUTO_VEC-NEXT:    [[T0:%.*]] = getelementptr double, ptr [[A]], i64 [[I]]
; AUTO_VEC-NEXT:    store double [[J]], ptr [[T0]], align 8
; AUTO_VEC-NEXT:    [[I_NEXT]] = add i64 [[I]], 1
; AUTO_VEC-NEXT:    [[J_NEXT]] = fadd fast double [[J]], 3.000000e+00
; AUTO_VEC-NEXT:    [[COND:%.*]] = icmp slt i64 [[I_NEXT]], [[N]]
; AUTO_VEC-NEXT:    br i1 [[COND]], label %[[LOOP]], label %[[FOR_END]], !llvm.loop [[LOOP7:![0-9]+]]
; AUTO_VEC:       [[FOR_END]]:
; AUTO_VEC-NEXT:    [[J_LCSSA:%.*]] = phi double [ [[J]], %[[LOOP]] ], [ [[TMP7]], %[[MIDDLE_BLOCK]] ]
; AUTO_VEC-NEXT:    ret double [[J_LCSSA]]
;
entry:
  br label %loop

loop:
  %i = phi i64 [ 0, %entry ], [%i.next, %loop]
  %j = phi double [ 0.0, %entry ], [ %j.next, %loop ]
  %t0 = getelementptr double, ptr %a, i64 %i
  store double %j, ptr %t0
  %i.next = add i64 %i, 1
  %j.next = fadd fast double %j, 3.0
  %cond = icmp slt i64 %i.next, %n
  br i1 %cond, label %loop, label %for.end

for.end:
  %t1 = phi double [ %j, %loop ]
  ret double %t1
}

define double @external_use_without_fast_math(ptr %a, i64 %n) {
; AUTO_VEC-LABEL: define double @external_use_without_fast_math(
; AUTO_VEC-SAME: ptr [[A:%.*]], i64 [[N:%.*]]) #[[ATTR0]] {
; AUTO_VEC-NEXT:  [[ENTRY_NEW:.*]]:
; AUTO_VEC-NEXT:    br label %[[FOR_BODY:.*]]
; AUTO_VEC:       [[FOR_BODY]]:
; AUTO_VEC-NEXT:    [[I:%.*]] = phi i64 [ 0, %[[ENTRY_NEW]] ], [ [[I_NEXT_7:%.*]], %[[FOR_BODY]] ]
; AUTO_VEC-NEXT:    [[J:%.*]] = phi double [ 0.000000e+00, %[[ENTRY_NEW]] ], [ [[J_NEXT_7:%.*]], %[[FOR_BODY]] ]
; AUTO_VEC-NEXT:    [[TMP7:%.*]] = getelementptr double, ptr [[A]], i64 [[I]]
; AUTO_VEC-NEXT:    store double [[J]], ptr [[TMP7]], align 8
; AUTO_VEC-NEXT:    [[I_NEXT_7]] = add i64 [[I]], 1
; AUTO_VEC-NEXT:    [[J_NEXT_7]] = fadd double [[J]], 3.000000e+00
; AUTO_VEC-NEXT:    [[COND:%.*]] = icmp slt i64 [[I_NEXT_7]], [[N]]
; AUTO_VEC-NEXT:    br i1 [[COND]], label %[[FOR_BODY]], label %[[FOR_END:.*]]
; AUTO_VEC:       [[FOR_END]]:
; AUTO_VEC-NEXT:    [[J_LCSSA:%.*]] = phi double [ [[J]], %[[FOR_BODY]] ]
; AUTO_VEC-NEXT:    ret double [[J_LCSSA]]
;
entry:
  br label %loop

loop:
  %i = phi i64 [ 0, %entry ], [%i.next, %loop]
  %j = phi double [ 0.0, %entry ], [ %j.next, %loop ]
  %t0 = getelementptr double, ptr %a, i64 %i
  store double %j, ptr %t0
  %i.next = add i64 %i, 1
  %j.next = fadd double %j, 3.0
  %cond = icmp slt i64 %i.next, %n
  br i1 %cond, label %loop, label %for.end

for.end:
  %t1 = phi double [ %j, %loop ]
  ret double %t1
}

;;  void fadd_induction(ptr p, unsigned N) {
;;    float x = 1.0f;
;;    for (unsigned i=0; i!=N; ++i) {
;;      p[i] = p[i] + x;
;;      x += 42.0f;
;;    }
;;  }

define void @fadd_reassoc_FMF(ptr nocapture %p, i32 %N) {
; AUTO_VEC-LABEL: define void @fadd_reassoc_FMF(
; AUTO_VEC-SAME: ptr captures(none) [[P:%.*]], i32 [[N:%.*]]) #[[ATTR0]] {
; AUTO_VEC-NEXT:  [[ITER_CHECK:.*]]:
; AUTO_VEC-NEXT:    [[TMP0:%.*]] = zext i32 [[N]] to i64
; AUTO_VEC-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP0]], 4
; AUTO_VEC-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[FOR_BODY:.*]], label %[[VECTOR_MAIN_LOOP_ITER_CHECK:.*]]
; AUTO_VEC:       [[VECTOR_MAIN_LOOP_ITER_CHECK]]:
; AUTO_VEC-NEXT:    [[MIN_ITERS_CHECK1:%.*]] = icmp ult i64 [[TMP0]], 32
; AUTO_VEC-NEXT:    br i1 [[MIN_ITERS_CHECK1]], label %[[VEC_EPILOG_PH:.*]], label %[[VECTOR_PH:.*]]
; AUTO_VEC:       [[VECTOR_PH]]:
; AUTO_VEC-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[TMP0]], 32
; AUTO_VEC-NEXT:    [[N_VEC:%.*]] = sub i64 [[TMP0]], [[N_MOD_VF]]
; AUTO_VEC-NEXT:    [[DOTCAST:%.*]] = sitofp i64 [[N_VEC]] to float
; AUTO_VEC-NEXT:    [[TMP1:%.*]] = fmul reassoc float 4.200000e+01, [[DOTCAST]]
; AUTO_VEC-NEXT:    [[IND_END:%.*]] = fadd reassoc float 1.000000e+00, [[TMP1]]
; AUTO_VEC-NEXT:    br label %[[VECTOR_BODY:.*]]
; AUTO_VEC:       [[VECTOR_BODY]]:
; AUTO_VEC-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; AUTO_VEC-NEXT:    [[VEC_IND:%.*]] = phi <8 x float> [ <float 1.000000e+00, float 4.300000e+01, float 8.500000e+01, float 1.270000e+02, float 1.690000e+02, float 2.110000e+02, float 2.530000e+02, float 2.950000e+02>, %[[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], %[[VECTOR_BODY]] ]
; AUTO_VEC-NEXT:    [[STEP_ADD:%.*]] = fadd reassoc <8 x float> [[VEC_IND]], splat (float 3.360000e+02)
; AUTO_VEC-NEXT:    [[STEP_ADD2:%.*]] = fadd reassoc <8 x float> [[STEP_ADD]], splat (float 3.360000e+02)
; AUTO_VEC-NEXT:    [[STEP_ADD3:%.*]] = fadd reassoc <8 x float> [[STEP_ADD2]], splat (float 3.360000e+02)
; AUTO_VEC-NEXT:    [[TMP2:%.*]] = getelementptr inbounds float, ptr [[P]], i64 [[INDEX]]
; AUTO_VEC-NEXT:    [[TMP3:%.*]] = getelementptr inbounds float, ptr [[TMP2]], i32 8
; AUTO_VEC-NEXT:    [[TMP4:%.*]] = getelementptr inbounds float, ptr [[TMP2]], i32 16
; AUTO_VEC-NEXT:    [[TMP5:%.*]] = getelementptr inbounds float, ptr [[TMP2]], i32 24
; AUTO_VEC-NEXT:    [[WIDE_LOAD:%.*]] = load <8 x float>, ptr [[TMP2]], align 4
; AUTO_VEC-NEXT:    [[WIDE_LOAD2:%.*]] = load <8 x float>, ptr [[TMP3]], align 4
; AUTO_VEC-NEXT:    [[WIDE_LOAD3:%.*]] = load <8 x float>, ptr [[TMP4]], align 4
; AUTO_VEC-NEXT:    [[WIDE_LOAD4:%.*]] = load <8 x float>, ptr [[TMP5]], align 4
; AUTO_VEC-NEXT:    [[TMP6:%.*]] = fadd reassoc <8 x float> [[VEC_IND]], [[WIDE_LOAD]]
; AUTO_VEC-NEXT:    [[TMP7:%.*]] = fadd reassoc <8 x float> [[STEP_ADD]], [[WIDE_LOAD2]]
; AUTO_VEC-NEXT:    [[TMP8:%.*]] = fadd reassoc <8 x float> [[STEP_ADD2]], [[WIDE_LOAD3]]
; AUTO_VEC-NEXT:    [[TMP9:%.*]] = fadd reassoc <8 x float> [[STEP_ADD3]], [[WIDE_LOAD4]]
; AUTO_VEC-NEXT:    store <8 x float> [[TMP6]], ptr [[TMP2]], align 4
; AUTO_VEC-NEXT:    store <8 x float> [[TMP7]], ptr [[TMP3]], align 4
; AUTO_VEC-NEXT:    store <8 x float> [[TMP8]], ptr [[TMP4]], align 4
; AUTO_VEC-NEXT:    store <8 x float> [[TMP9]], ptr [[TMP5]], align 4
; AUTO_VEC-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 32
; AUTO_VEC-NEXT:    [[VEC_IND_NEXT]] = fadd reassoc <8 x float> [[STEP_ADD3]], splat (float 3.360000e+02)
; AUTO_VEC-NEXT:    [[TMP10:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; AUTO_VEC-NEXT:    br i1 [[TMP10]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]]
; AUTO_VEC:       [[MIDDLE_BLOCK]]:
; AUTO_VEC-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[TMP0]], [[N_VEC]]
; AUTO_VEC-NEXT:    br i1 [[CMP_N]], label %[[EXIT:.*]], label %[[VEC_EPILOG_ITER_CHECK:.*]]
; AUTO_VEC:       [[VEC_EPILOG_ITER_CHECK]]:
; AUTO_VEC-NEXT:    [[DOTCAST16:%.*]] = sitofp i64 [[N_VEC]] to float
; AUTO_VEC-NEXT:    [[TMP12:%.*]] = fmul reassoc float 4.200000e+01, [[DOTCAST16]]
; AUTO_VEC-NEXT:    [[IND_END1:%.*]] = fadd reassoc float 1.000000e+00, [[TMP12]]
; AUTO_VEC-NEXT:    [[MIN_EPILOG_ITERS_CHECK:%.*]] = icmp ult i64 [[N_MOD_VF]], 4
; AUTO_VEC-NEXT:    br i1 [[MIN_EPILOG_ITERS_CHECK]], label %[[FOR_BODY]], label %[[VEC_EPILOG_PH]], !prof [[PROF3]]
; AUTO_VEC:       [[VEC_EPILOG_PH]]:
; AUTO_VEC-NEXT:    [[VEC_EPILOG_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; AUTO_VEC-NEXT:    [[BC_RESUME_VAL:%.*]] = phi float [ [[IND_END]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 1.000000e+00, %[[VECTOR_MAIN_LOOP_ITER_CHECK]] ]
; AUTO_VEC-NEXT:    [[N_MOD_VF5:%.*]] = urem i64 [[TMP0]], 4
; AUTO_VEC-NEXT:    [[N_VEC6:%.*]] = sub i64 [[TMP0]], [[N_MOD_VF5]]
; AUTO_VEC-NEXT:    [[DOTCAST7:%.*]] = sitofp i64 [[N_VEC6]] to float
; AUTO_VEC-NEXT:    [[TMP17:%.*]] = fmul reassoc float 4.200000e+01, [[DOTCAST7]]
; AUTO_VEC-NEXT:    [[TMP18:%.*]] = fadd reassoc float 1.000000e+00, [[TMP17]]
; AUTO_VEC-NEXT:    [[DOTSPLATINSERT:%.*]] = insertelement <4 x float> poison, float [[BC_RESUME_VAL]], i64 0
; AUTO_VEC-NEXT:    [[DOTSPLAT:%.*]] = shufflevector <4 x float> [[DOTSPLATINSERT]], <4 x float> poison, <4 x i32> zeroinitializer
; AUTO_VEC-NEXT:    [[INDUCTION:%.*]] = fadd reassoc <4 x float> [[DOTSPLAT]], <float 0.000000e+00, float 4.200000e+01, float 8.400000e+01, float 1.260000e+02>
; AUTO_VEC-NEXT:    br label %[[VEC_EPILOG_VECTOR_BODY:.*]]
; AUTO_VEC:       [[VEC_EPILOG_VECTOR_BODY]]:
; AUTO_VEC-NEXT:    [[INDEX13:%.*]] = phi i64 [ [[VEC_EPILOG_RESUME_VAL]], %[[VEC_EPILOG_PH]] ], [ [[INDEX_NEXT17:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; AUTO_VEC-NEXT:    [[VEC_IND14:%.*]] = phi <4 x float> [ [[INDUCTION]], %[[VEC_EPILOG_PH]] ], [ [[VEC_IND_NEXT15:%.*]], %[[VEC_EPILOG_VECTOR_BODY]] ]
; AUTO_VEC-NEXT:    [[TMP13:%.*]] = getelementptr inbounds float, ptr [[P]], i64 [[INDEX13]]
; AUTO_VEC-NEXT:    [[WIDE_LOAD16:%.*]] = load <4 x float>, ptr [[TMP13]], align 4
; AUTO_VEC-NEXT:    [[TMP14:%.*]] = fadd reassoc <4 x float> [[VEC_IND14]], [[WIDE_LOAD16]]
; AUTO_VEC-NEXT:    store <4 x float> [[TMP14]], ptr [[TMP13]], align 4
; AUTO_VEC-NEXT:    [[INDEX_NEXT17]] = add nuw i64 [[INDEX13]], 4
; AUTO_VEC-NEXT:    [[VEC_IND_NEXT15]] = fadd reassoc <4 x float> [[VEC_IND14]], splat (float 1.680000e+02)
; AUTO_VEC-NEXT:    [[TMP15:%.*]] = icmp eq i64 [[INDEX_NEXT17]], [[N_VEC6]]
; AUTO_VEC-NEXT:    br i1 [[TMP15]], label %[[VEC_EPILOG_MIDDLE_BLOCK:.*]], label %[[VEC_EPILOG_VECTOR_BODY]], !llvm.loop [[LOOP9:![0-9]+]]
; AUTO_VEC:       [[VEC_EPILOG_MIDDLE_BLOCK]]:
; AUTO_VEC-NEXT:    [[CMP_N18:%.*]] = icmp eq i64 [[TMP0]], [[N_VEC6]]
; AUTO_VEC-NEXT:    br i1 [[CMP_N18]], label %[[EXIT]], label %[[FOR_BODY]]
; AUTO_VEC:       [[FOR_BODY]]:
; AUTO_VEC-NEXT:    [[BC_RESUME_VAL14:%.*]] = phi i64 [ [[N_VEC6]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[N_VEC]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 0, %[[ITER_CHECK]] ]
; AUTO_VEC-NEXT:    [[BC_RESUME_VAL15:%.*]] = phi float [ [[TMP18]], %[[VEC_EPILOG_MIDDLE_BLOCK]] ], [ [[IND_END1]], %[[VEC_EPILOG_ITER_CHECK]] ], [ 1.000000e+00, %[[ITER_CHECK]] ]
; AUTO_VEC-NEXT:    br label %[[LOOP:.*]]
; AUTO_VEC:       [[LOOP]]:
; AUTO_VEC-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[BC_RESUME_VAL14]], %[[FOR_BODY]] ], [ [[INDVARS_IV_NEXT:%.*]], %[[LOOP]] ]
; AUTO_VEC-NEXT:    [[X_012:%.*]] = phi float [ [[BC_RESUME_VAL15]], %[[FOR_BODY]] ], [ [[ADD3:%.*]], %[[LOOP]] ]
; AUTO_VEC-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds float, ptr [[P]], i64 [[INDVARS_IV]]
; AUTO_VEC-NEXT:    [[TMP16:%.*]] = load float, ptr [[ARRAYIDX]], align 4
; AUTO_VEC-NEXT:    [[ADD:%.*]] = fadd reassoc float [[X_012]], [[TMP16]]
; AUTO_VEC-NEXT:    store float [[ADD]], ptr [[ARRAYIDX]], align 4
; AUTO_VEC-NEXT:    [[ADD3]] = fadd reassoc float [[X_012]], 4.200000e+01
; AUTO_VEC-NEXT:    [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
; AUTO_VEC-NEXT:    [[CMP_NOT:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], [[TMP0]]
; AUTO_VEC-NEXT:    br i1 [[CMP_NOT]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP10:![0-9]+]]
; AUTO_VEC:       [[EXIT]]:
; AUTO_VEC-NEXT:    ret void
;
entry:
  %0 = zext i32 %N to i64
  br label %loop

loop:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %x.012 = phi float [ 1.000000e+00, %entry ], [ %add3, %loop ]
  %arrayidx = getelementptr inbounds float, ptr %p, i64 %iv
  %1 = load float, ptr %arrayidx, align 4
  %add = fadd reassoc float %x.012, %1
  store float %add, ptr %arrayidx, align 4
  %add3 = fadd reassoc float %x.012, 4.200000e+01
  %iv.next = add nuw nsw i64 %iv, 1
  %cmp.not = icmp eq i64 %iv.next, %0
  br i1 %cmp.not, label %exit, label %loop

exit:
  ret void
}