llvm/test/Transforms/LoopVectorize/X86/iv-live-outs.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -p loop-vectorize -mcpu=skylake-avx512 -S %s | FileCheck %s

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

define i64 @test_pr98660(ptr %dst, i64 %N) {
; CHECK-LABEL: define i64 @test_pr98660(
; CHECK-SAME: ptr [[DST:%.*]], i64 [[N:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[TMP0:%.*]] = add i64 [[N]], 1
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[TMP0]], 32
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i64 [[TMP0]], 32
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 [[TMP0]], [[N_MOD_VF]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP5:%.*]] = add i64 [[INDEX]], 1
; CHECK-NEXT:    [[TMP9:%.*]] = getelementptr i32, ptr [[DST]], i64 [[TMP5]]
; CHECK-NEXT:    [[TMP13:%.*]] = getelementptr i32, ptr [[TMP9]], i32 0
; CHECK-NEXT:    [[TMP14:%.*]] = getelementptr i32, ptr [[TMP9]], i32 8
; CHECK-NEXT:    [[TMP15:%.*]] = getelementptr i32, ptr [[TMP9]], i32 16
; CHECK-NEXT:    [[TMP16:%.*]] = getelementptr i32, ptr [[TMP9]], i32 24
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <8 x i32>, ptr [[TMP13]], align 4
; CHECK-NEXT:    [[WIDE_LOAD1:%.*]] = load <8 x i32>, ptr [[TMP14]], align 4
; CHECK-NEXT:    [[WIDE_LOAD2:%.*]] = load <8 x i32>, ptr [[TMP15]], align 4
; CHECK-NEXT:    [[WIDE_LOAD3:%.*]] = load <8 x i32>, ptr [[TMP16]], align 4
; CHECK-NEXT:    [[TMP17:%.*]] = icmp eq <8 x i32> [[WIDE_LOAD]], zeroinitializer
; CHECK-NEXT:    [[TMP18:%.*]] = icmp eq <8 x i32> [[WIDE_LOAD1]], zeroinitializer
; CHECK-NEXT:    [[TMP19:%.*]] = icmp eq <8 x i32> [[WIDE_LOAD2]], zeroinitializer
; CHECK-NEXT:    [[TMP20:%.*]] = icmp eq <8 x i32> [[WIDE_LOAD3]], zeroinitializer
; CHECK-NEXT:    call void @llvm.masked.store.v8i32.p0(<8 x i32> zeroinitializer, ptr [[TMP13]], i32 4, <8 x i1> [[TMP17]])
; CHECK-NEXT:    call void @llvm.masked.store.v8i32.p0(<8 x i32> zeroinitializer, ptr [[TMP14]], i32 4, <8 x i1> [[TMP18]])
; CHECK-NEXT:    call void @llvm.masked.store.v8i32.p0(<8 x i32> zeroinitializer, ptr [[TMP15]], i32 4, <8 x i1> [[TMP19]])
; CHECK-NEXT:    call void @llvm.masked.store.v8i32.p0(<8 x i32> zeroinitializer, ptr [[TMP16]], i32 4, <8 x i1> [[TMP20]])
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 32
; CHECK-NEXT:    [[TMP21:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP21]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[TMP0]], [[N_VEC]]
; CHECK-NEXT:    [[IND_ESCAPE:%.*]] = sub i64 [[N_VEC]], 1
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[EXIT:.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; CHECK-NEXT:    br label %[[LOOP_HEADER:.*]]
; CHECK:       [[LOOP_HEADER]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ]
; CHECK-NEXT:    [[OR:%.*]] = or disjoint i64 [[IV]], 1
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, ptr [[DST]], i64 [[OR]]
; CHECK-NEXT:    [[L:%.*]] = load i32, ptr [[GEP]], align 4
; CHECK-NEXT:    [[C:%.*]] = icmp eq i32 [[L]], 0
; CHECK-NEXT:    br i1 [[C]], label %[[THEN:.*]], label %[[LOOP_LATCH]]
; CHECK:       [[THEN]]:
; CHECK-NEXT:    store i32 0, ptr [[GEP]], align 4
; CHECK-NEXT:    br label %[[LOOP_LATCH]]
; CHECK:       [[LOOP_LATCH]]:
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[IV]], 1
; CHECK-NEXT:    [[EC:%.*]] = icmp ult i64 [[IV]], [[N]]
; CHECK-NEXT:    br i1 [[EC]], label %[[LOOP_HEADER]], label %[[EXIT]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[RET:%.*]] = phi i64 [ [[IV]], %[[LOOP_LATCH]] ], [ [[IND_ESCAPE]], %[[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i64 [[RET]]
;
entry:
  br label %loop.header

loop.header:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
  %or = or disjoint i64 %iv, 1
  %gep = getelementptr i32, ptr %dst, i64 %or
  %l = load i32, ptr %gep
  %c = icmp eq i32 %l, 0
  br i1 %c, label %then, label %loop.latch

then:
  store i32 0, ptr %gep, align 4
  br label %loop.latch

loop.latch:
  %iv.next = add i64 %iv, 1
  %ec = icmp ult i64 %iv, %N
  br i1 %ec, label %loop.header, label %exit

exit:
  %ret = phi i64 [ %iv, %loop.latch ]
  ret i64 %ret
}
;.
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
; CHECK: [[META1]] = !{!"llvm.loop.isvectorized", i32 1}
; CHECK: [[META2]] = !{!"llvm.loop.unroll.runtime.disable"}
; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META2]], [[META1]]}
;.