llvm/test/Transforms/LoopVectorize/X86/narrow-to-single-scalar.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
; RUN: opt -p loop-vectorize -mcpu=skylake -S %s | FileCheck %s

target triple = "x86_64-unknown-linux-gnu"

@p = external global [3952 x i8], align 8
@q = external global [3952 x i8], align 8

define void @narrow_store_user_mask_operand(i32 %x) {
; CHECK-LABEL: define void @narrow_store_user_mask_operand(
; CHECK-SAME: i32 [[X:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    br label %[[LOOP_PH:.*]]
; CHECK:       [[LOOP_PH]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP_TAIL:.*]] ]
; CHECK-NEXT:    [[X_POS:%.*]] = icmp sgt i32 [[X]], 0
; CHECK-NEXT:    br i1 [[X_POS]], label %[[LOOP_BODY:.*]], label %[[LOOP_TAIL]]
; CHECK:       [[LOOP_BODY]]:
; CHECK-NEXT:    [[LD_P:%.*]] = load double, ptr @p, align 8
; CHECK-NEXT:    [[GEP_Q_IV:%.*]] = getelementptr double, ptr @q, i64 [[IV]]
; CHECK-NEXT:    [[GEP_Q_IV_8:%.*]] = getelementptr i8, ptr [[GEP_Q_IV]], i64 -8
; CHECK-NEXT:    store double [[LD_P]], ptr [[GEP_Q_IV_8]], align 8
; CHECK-NEXT:    br label %[[LOOP_TAIL]]
; CHECK:       [[LOOP_TAIL]]:
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[IV]], 1
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i64 [[IV]], 1
; CHECK-NEXT:    br i1 [[EC]], label %[[EXIT:.*]], label %[[LOOP_PH]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop.ph

loop.ph:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.tail ]
  %x.pos = icmp sgt i32 %x, 0
  br i1 %x.pos, label %loop.body, label %loop.tail

loop.body:
  %ld.p = load double, ptr @p
  %gep.q.iv = getelementptr double, ptr @q, i64 %iv
  %gep.q.iv.8 = getelementptr i8, ptr %gep.q.iv, i64 -8
  store double %ld.p, ptr %gep.q.iv.8
  br label %loop.tail

loop.tail:
  %iv.next = add i64 %iv, 1
  %ec = icmp eq i64 %iv, 1
  br i1 %ec, label %exit, label %loop.ph

exit:
  ret void
}