test/Transforms/LoopVectorize/AArch64/drop-poison-generating-flags.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-globals none --version 5
; RUN: opt -p loop-vectorize -mcpu=neoverse-v2 -force-vector-width=4 -S %s | FileCheck %s

target triple = "aarch64-unknown-linux"

; Test case where we visit a VPWidenIntrinsic (for @llvm.fabs) with nnan flags.
; For https://github.com/llvm/llvm-project/issues/125301.
define void @check_widen_intrinsic_with_nnan(ptr noalias %dst.0, ptr noalias %dst.1, ptr noalias %src.1, ptr %src.2) {
; CHECK-LABEL: define void @check_widen_intrinsic_with_nnan(
; CHECK-SAME: ptr noalias [[DST_0:%.*]], ptr noalias [[DST_1:%.*]], ptr noalias [[SRC_1:%.*]], ptr [[SRC_2:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[PRED_LOAD_CONTINUE6:.*]] ]
; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds double, ptr [[SRC_1]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <4 x double>, ptr [[TMP1]], align 8
; CHECK-NEXT:    [[TMP3:%.*]] = call <4 x double> @llvm.fabs.v4f64(<4 x double> [[WIDE_LOAD]])
; CHECK-NEXT:    [[TMP4:%.*]] = fcmp olt <4 x double> [[TMP3]], splat (double 1.000000e+00)
; CHECK-NEXT:    [[TMP5:%.*]] = xor <4 x i1> [[TMP4]], splat (i1 true)
; CHECK-NEXT:    [[TMP6:%.*]] = add i64 [[INDEX]], -1
; CHECK-NEXT:    [[TMP7:%.*]] = getelementptr double, ptr [[DST_0]], i64 [[TMP6]]
; CHECK-NEXT:    call void @llvm.masked.store.v4f64.p0(<4 x double> zeroinitializer, ptr [[TMP7]], i32 8, <4 x i1> [[TMP5]])
; CHECK-NEXT:    [[TMP9:%.*]] = extractelement <4 x i1> [[TMP4]], i32 0
; CHECK-NEXT:    br i1 [[TMP9]], label %[[PRED_LOAD_IF:.*]], label %[[PRED_LOAD_CONTINUE:.*]]
; CHECK:       [[PRED_LOAD_IF]]:
; CHECK-NEXT:    [[TMP10:%.*]] = load double, ptr [[SRC_2]], align 8
; CHECK-NEXT:    [[TMP11:%.*]] = insertelement <4 x double> poison, double [[TMP10]], i32 0
; CHECK-NEXT:    br label %[[PRED_LOAD_CONTINUE]]
; CHECK:       [[PRED_LOAD_CONTINUE]]:
; CHECK-NEXT:    [[TMP12:%.*]] = phi <4 x double> [ poison, %[[VECTOR_BODY]] ], [ [[TMP11]], %[[PRED_LOAD_IF]] ]
; CHECK-NEXT:    [[TMP13:%.*]] = extractelement <4 x i1> [[TMP4]], i32 1
; CHECK-NEXT:    br i1 [[TMP13]], label %[[PRED_LOAD_IF1:.*]], label %[[PRED_LOAD_CONTINUE2:.*]]
; CHECK:       [[PRED_LOAD_IF1]]:
; CHECK-NEXT:    [[TMP14:%.*]] = load double, ptr [[SRC_2]], align 8
; CHECK-NEXT:    [[TMP15:%.*]] = insertelement <4 x double> [[TMP12]], double [[TMP14]], i32 1
; CHECK-NEXT:    br label %[[PRED_LOAD_CONTINUE2]]
; CHECK:       [[PRED_LOAD_CONTINUE2]]:
; CHECK-NEXT:    [[TMP16:%.*]] = phi <4 x double> [ [[TMP12]], %[[PRED_LOAD_CONTINUE]] ], [ [[TMP15]], %[[PRED_LOAD_IF1]] ]
; CHECK-NEXT:    [[TMP17:%.*]] = extractelement <4 x i1> [[TMP4]], i32 2
; CHECK-NEXT:    br i1 [[TMP17]], label %[[PRED_LOAD_IF3:.*]], label %[[PRED_LOAD_CONTINUE4:.*]]
; CHECK:       [[PRED_LOAD_IF3]]:
; CHECK-NEXT:    [[TMP18:%.*]] = load double, ptr [[SRC_2]], align 8
; CHECK-NEXT:    [[TMP19:%.*]] = insertelement <4 x double> [[TMP16]], double [[TMP18]], i32 2
; CHECK-NEXT:    br label %[[PRED_LOAD_CONTINUE4]]
; CHECK:       [[PRED_LOAD_CONTINUE4]]:
; CHECK-NEXT:    [[TMP20:%.*]] = phi <4 x double> [ [[TMP16]], %[[PRED_LOAD_CONTINUE2]] ], [ [[TMP19]], %[[PRED_LOAD_IF3]] ]
; CHECK-NEXT:    [[TMP21:%.*]] = extractelement <4 x i1> [[TMP4]], i32 3
; CHECK-NEXT:    br i1 [[TMP21]], label %[[PRED_LOAD_IF5:.*]], label %[[PRED_LOAD_CONTINUE6]]
; CHECK:       [[PRED_LOAD_IF5]]:
; CHECK-NEXT:    [[TMP22:%.*]] = load double, ptr [[SRC_2]], align 8
; CHECK-NEXT:    [[TMP23:%.*]] = insertelement <4 x double> [[TMP20]], double [[TMP22]], i32 3
; CHECK-NEXT:    br label %[[PRED_LOAD_CONTINUE6]]
; CHECK:       [[PRED_LOAD_CONTINUE6]]:
; CHECK-NEXT:    [[TMP24:%.*]] = phi <4 x double> [ [[TMP20]], %[[PRED_LOAD_CONTINUE4]] ], [ [[TMP23]], %[[PRED_LOAD_IF5]] ]
; CHECK-NEXT:    call void @llvm.masked.store.v4f64.p0(<4 x double> zeroinitializer, ptr [[TMP7]], i32 8, <4 x i1> [[TMP4]])
; CHECK-NEXT:    [[TMP28:%.*]] = fcmp oeq <4 x double> [[TMP24]], zeroinitializer
; CHECK-NEXT:    [[TMP29:%.*]] = select <4 x i1> [[TMP4]], <4 x i1> [[TMP28]], <4 x i1> zeroinitializer
; CHECK-NEXT:    [[TMP30:%.*]] = or <4 x i1> [[TMP5]], [[TMP29]]
; CHECK-NEXT:    [[TMP32:%.*]] = getelementptr i32, ptr [[DST_1]], i64 [[TMP6]]
; CHECK-NEXT:    call void @llvm.masked.store.v4i32.p0(<4 x i32> splat (i32 10), ptr [[TMP32]], i32 4, <4 x i1> [[TMP30]])
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT:    [[TMP34:%.*]] = icmp eq i64 [[INDEX_NEXT]], 1000
; CHECK-NEXT:    br i1 [[TMP34]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    br label %[[EXIT:.*]]
; CHECK:       [[SCALAR_PH]]:
; CHECK-NEXT:    br label %[[LOOP_HEADER:.*]]
; CHECK:       [[LOOP_HEADER]]:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 0, %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ]
; CHECK-NEXT:    [[GEP_SRC_1:%.*]] = getelementptr inbounds double, ptr [[SRC_1]], i64 [[IV]]
; CHECK-NEXT:    [[L_1:%.*]] = load double, ptr [[GEP_SRC_1]], align 8
; CHECK-NEXT:    [[ABS:%.*]] = tail call nnan double @llvm.fabs.f64(double [[L_1]])
; CHECK-NEXT:    [[C_0:%.*]] = fcmp olt double [[ABS]], 1.000000e+00
; CHECK-NEXT:    br i1 [[C_0]], label %[[THEN:.*]], label %[[ELSE:.*]]
; CHECK:       [[THEN]]:
; CHECK-NEXT:    [[L_2:%.*]] = load double, ptr [[SRC_2]], align 8
; CHECK-NEXT:    [[IV_SUB_1:%.*]] = add nsw i64 [[IV]], -1
; CHECK-NEXT:    [[GEP_IV_SUB_1:%.*]] = getelementptr double, ptr [[DST_0]], i64 [[IV_SUB_1]]
; CHECK-NEXT:    store double 0.000000e+00, ptr [[GEP_IV_SUB_1]], align 8
; CHECK-NEXT:    [[C_1:%.*]] = fcmp oeq double [[L_2]], 0.000000e+00
; CHECK-NEXT:    br i1 [[C_1]], label %[[MERGE:.*]], label %[[LOOP_LATCH]]
; CHECK:       [[ELSE]]:
; CHECK-NEXT:    [[IV_SUB_2:%.*]] = add nsw i64 [[IV]], -1
; CHECK-NEXT:    [[GEP_IV_SUB_2:%.*]] = getelementptr double, ptr [[DST_0]], i64 [[IV_SUB_2]]
; CHECK-NEXT:    store double 0.000000e+00, ptr [[GEP_IV_SUB_2]], align 8
; CHECK-NEXT:    br label %[[MERGE]]
; CHECK:       [[MERGE]]:
; CHECK-NEXT:    [[MERGE_IV:%.*]] = phi i64 [ [[IV_SUB_2]], %[[ELSE]] ], [ [[IV_SUB_1]], %[[THEN]] ]
; CHECK-NEXT:    [[GEP_DST_1:%.*]] = getelementptr inbounds i32, ptr [[DST_1]], i64 [[MERGE_IV]]
; CHECK-NEXT:    store i32 10, ptr [[GEP_DST_1]], align 4
; CHECK-NEXT:    br label %[[LOOP_LATCH]]
; CHECK:       [[LOOP_LATCH]]:
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV_NEXT]], 1000
; CHECK-NEXT:    br i1 [[EXITCOND_NOT]], label %[[EXIT]], label %[[LOOP_HEADER]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop.header

loop.header:
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
  %gep.src.1 = getelementptr inbounds double, ptr %src.1, i64 %iv
  %l.1 = load double, ptr %gep.src.1, align 8
  %abs = tail call nnan double @llvm.fabs.f64(double %l.1)
  %c.0 = fcmp olt double %abs, 1.000000e+00
  br i1 %c.0, label %then, label %else

then:
  %l.2 = load double, ptr %src.2, align 8
  %iv.sub.1 = add nsw i64 %iv, -1
  %gep.iv.sub.1 = getelementptr double, ptr %dst.0, i64 %iv.sub.1
  store double 0.000000e+00, ptr %gep.iv.sub.1, align 8
  %c.1 = fcmp oeq double %l.2, 0.000000e+00
  br i1 %c.1, label %merge, label %loop.latch

else:
  %iv.sub.2 = add nsw i64 %iv, -1
  %gep.iv.sub.2 = getelementptr double, ptr %dst.0, i64 %iv.sub.2
  store double 0.000000e+00, ptr %gep.iv.sub.2, align 8
  br label %merge

merge:
  %merge.iv = phi i64 [ %iv.sub.2, %else ], [ %iv.sub.1, %then ]
  %gep.dst.1 = getelementptr inbounds i32, ptr %dst.1, i64 %merge.iv
  store i32 10, ptr %gep.dst.1, align 4
  br label %loop.latch

loop.latch:
  %iv.next = add nuw nsw i64 %iv, 1
  %exitcond.not = icmp eq i64 %iv.next, 1000
  br i1 %exitcond.not, label %exit, label %loop.header

exit:
ret void
}

declare double @llvm.fabs.f64(double)