llvm/test/Transforms/LoopVectorize/iv-select-cmp-non-const-iv-start.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -passes=loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -S < %s | FileCheck %s --check-prefix=CHECK
; RUN: opt -passes=loop-vectorize -force-vector-interleave=4 -force-vector-width=4 -S < %s | FileCheck %s --check-prefix=CHECK
; RUN: opt -passes=loop-vectorize -force-vector-interleave=4 -force-vector-width=1 -S < %s | FileCheck %s --check-prefix=CHECK

define i64 @select_non_const_iv_start_signed_guard(ptr %a, i64 %rdx_start, i64 %iv_start ,i64 %n) {
; CHECK-LABEL: define i64 @select_non_const_iv_start_signed_guard(
; CHECK-SAME: ptr [[A:%.*]], i64 [[RDX_START:%.*]], i64 [[IV_START:%.*]], i64 [[N:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[GUARD:%.*]] = icmp slt i64 [[IV_START]], [[N]]
; CHECK-NEXT:    br i1 [[GUARD]], label %[[FOR_BODY_PREHEADER:.*]], label %[[EXIT:.*]]
; CHECK:       [[FOR_BODY_PREHEADER]]:
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], %[[FOR_BODY]] ], [ [[IV_START]], %[[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    [[RDX_07:%.*]] = phi i64 [ [[COND:%.*]], %[[FOR_BODY]] ], [ [[RDX_START]], %[[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i64, ptr [[A]], i64 [[IV]]
; CHECK-NEXT:    [[TMP0:%.*]] = load i64, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[CMP1:%.*]] = icmp sgt i64 [[TMP0]], 3
; CHECK-NEXT:    [[COND]] = select i1 [[CMP1]], i64 [[IV]], i64 [[RDX_07]]
; CHECK-NEXT:    [[IV_NEXT]] = add nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[N]]
; CHECK-NEXT:    br i1 [[EXITCOND_NOT]], label %[[EXIT_LOOPEXIT:.*]], label %[[FOR_BODY]]
; CHECK:       [[EXIT_LOOPEXIT]]:
; CHECK-NEXT:    [[COND_LCSSA:%.*]] = phi i64 [ [[COND]], %[[FOR_BODY]] ]
; CHECK-NEXT:    br label %[[EXIT]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[IDX_0_LCSSA:%.*]] = phi i64 [ [[RDX_START]], %[[ENTRY]] ], [ [[COND_LCSSA]], %[[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i64 [[IDX_0_LCSSA]]
;
entry:
  %guard = icmp slt i64 %iv_start, %n
  br i1 %guard, label %for.body, label %exit

for.body:
  %iv = phi i64 [ %iv_start, %entry ], [ %iv.next, %for.body ]
  %rdx.07 = phi i64 [ %rdx_start, %entry ], [ %cond, %for.body ]
  %arrayidx = getelementptr inbounds i64, ptr %a, i64 %iv
  %1 = load i64, ptr %arrayidx, align 4
  %cmp1 = icmp sgt i64 %1, 3
  %cond = select i1 %cmp1, i64 %iv, i64 %rdx.07
  %iv.next = add nsw i64 %iv, 1
  %exitcond.not = icmp eq i64 %iv.next, %n
  br i1 %exitcond.not, label %exit, label %for.body

exit:
  %idx.0.lcssa = phi i64 [ %rdx_start, %entry ], [ %cond, %for.body ]
  ret i64 %idx.0.lcssa
}

define i32 @select_trunc_non_const_iv_start_signed_guard(ptr %a, i32 %rdx_start, i32 %iv_start ,i32 %n) {
; CHECK-LABEL: define i32 @select_trunc_non_const_iv_start_signed_guard(
; CHECK-SAME: ptr [[A:%.*]], i32 [[RDX_START:%.*]], i32 [[IV_START:%.*]], i32 [[N:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[GUARD:%.*]] = icmp slt i32 [[IV_START]], [[N]]
; CHECK-NEXT:    br i1 [[GUARD]], label %[[FOR_BODY_PREHEADER:.*]], label %[[EXIT:.*]]
; CHECK:       [[FOR_BODY_PREHEADER]]:
; CHECK-NEXT:    [[TMP0:%.*]] = sext i32 [[IV_START]] to i64
; CHECK-NEXT:    [[WIDE_TRIP_COUNT:%.*]] = sext i32 [[N]] to i64
; CHECK-NEXT:    br label %[[FOR_BODY:.*]]
; CHECK:       [[FOR_BODY]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[TMP0]], %[[FOR_BODY_PREHEADER]] ], [ [[IV_NEXT:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[RDX_07:%.*]] = phi i32 [ [[RDX_START]], %[[FOR_BODY_PREHEADER]] ], [ [[COND:%.*]], %[[FOR_BODY]] ]
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[IV]]
; CHECK-NEXT:    [[TMP1:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[CMP1:%.*]] = icmp sgt i32 [[TMP1]], 3
; CHECK-NEXT:    [[TMP2:%.*]] = trunc i64 [[IV]] to i32
; CHECK-NEXT:    [[COND]] = select i1 [[CMP1]], i32 [[TMP2]], i32 [[RDX_07]]
; CHECK-NEXT:    [[IV_NEXT]] = add nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], [[WIDE_TRIP_COUNT]]
; CHECK-NEXT:    br i1 [[EXITCOND_NOT]], label %[[EXIT_LOOPEXIT:.*]], label %[[FOR_BODY]]
; CHECK:       [[EXIT_LOOPEXIT]]:
; CHECK-NEXT:    [[COND_LCSSA:%.*]] = phi i32 [ [[COND]], %[[FOR_BODY]] ]
; CHECK-NEXT:    br label %[[EXIT]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[IDX_0_LCSSA:%.*]] = phi i32 [ [[RDX_START]], %[[ENTRY]] ], [ [[COND_LCSSA]], %[[EXIT_LOOPEXIT]] ]
; CHECK-NEXT:    ret i32 [[IDX_0_LCSSA]]
;
entry:
  %guard = icmp slt i32 %iv_start, %n
  br i1 %guard, label %for.body.preheader, label %exit

for.body.preheader:
  %0 = sext i32 %iv_start to i64
  %wide.trip.count = sext i32 %n to i64
  br label %for.body

for.body:
  %iv = phi i64 [ %0, %for.body.preheader ], [ %iv.next, %for.body ]
  %rdx.07 = phi i32 [ %rdx_start, %for.body.preheader ], [ %cond, %for.body ]
  %arrayidx = getelementptr inbounds i32, ptr %a, i64 %iv
  %1 = load i32, ptr %arrayidx, align 4
  %cmp1 = icmp sgt i32 %1, 3
  %2 = trunc i64 %iv to i32
  %cond = select i1 %cmp1, i32 %2, i32 %rdx.07
  %iv.next = add nsw i64 %iv, 1
  %exitcond.not = icmp eq i64 %iv.next, %wide.trip.count
  br i1 %exitcond.not, label %exit, label %for.body

exit:
  %idx.0.lcssa = phi i32 [ %rdx_start, %entry ], [ %cond, %for.body ]
  ret i32 %idx.0.lcssa
}