; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=loop-vectorize,dce,instcombine -force-target-instruction-cost=1 \
; RUN: -prefer-predicate-over-epilogue=scalar-epilogue < %s -S | FileCheck %s
target triple = "aarch64-linux-gnu"
; Test a case where the vectorised induction variable is used to
; generate a mask:
; for (long long i = 0; i < n; i++) {
; if (i & 0x1)
; a[i] = b[i];
; }
define void @cond_ind64(ptr noalias nocapture %a, ptr noalias nocapture readonly %b, i64 %n) #0 {
; CHECK-LABEL: @cond_ind64(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT: [[TMP1:%.*]] = shl i64 [[TMP0]], 2
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N:%.*]], [[TMP1]]
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[TMP2:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT: [[TMP3:%.*]] = shl i64 [[TMP2]], 2
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i64 [[N]], [[TMP3]]
; CHECK-NEXT: [[N_VEC:%.*]] = sub i64 [[N]], [[N_MOD_VF]]
; CHECK-NEXT: [[TMP4:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT: [[TMP5:%.*]] = shl i64 [[TMP4]], 2
; CHECK-NEXT: [[TMP6:%.*]] = call <vscale x 4 x i64> @llvm.stepvector.nxv4i64()
; CHECK-NEXT: [[TMP7:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT: [[TMP8:%.*]] = shl i64 [[TMP7]], 2
; CHECK-NEXT: [[DOTSPLATINSERT:%.*]] = insertelement <vscale x 4 x i64> poison, i64 [[TMP8]], i64 0
; CHECK-NEXT: [[DOTSPLAT:%.*]] = shufflevector <vscale x 4 x i64> [[DOTSPLATINSERT]], <vscale x 4 x i64> poison, <vscale x 4 x i32> zeroinitializer
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <vscale x 4 x i64> [ [[TMP6]], [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP9:%.*]] = trunc <vscale x 4 x i64> [[VEC_IND]] to <vscale x 4 x i1>
; CHECK-NEXT: [[TMP10:%.*]] = getelementptr i32, ptr [[B:%.*]], i64 [[INDEX]]
; CHECK-NEXT: [[WIDE_MASKED_LOAD:%.*]] = call <vscale x 4 x i32> @llvm.masked.load.nxv4i32.p0(ptr [[TMP10]], i32 4, <vscale x 4 x i1> [[TMP9]], <vscale x 4 x i32> poison)
; CHECK-NEXT: [[TMP11:%.*]] = getelementptr i32, ptr [[A:%.*]], i64 [[INDEX]]
; CHECK-NEXT: call void @llvm.masked.store.nxv4i32.p0(<vscale x 4 x i32> [[WIDE_MASKED_LOAD]], ptr [[TMP11]], i32 4, <vscale x 4 x i1> [[TMP9]])
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], [[TMP5]]
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <vscale x 4 x i64> [[VEC_IND]], [[DOTSPLAT]]
; CHECK-NEXT: [[TMP12:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP12]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i64 [[N_MOD_VF]], 0
; 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 [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_08:%.*]] = phi i64 [ [[INC:%.*]], [[FOR_INC:%.*]] ], [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ]
; CHECK-NEXT: [[AND:%.*]] = and i64 [[I_08]], 1
; CHECK-NEXT: [[TOBOOL_NOT:%.*]] = icmp eq i64 [[AND]], 0
; CHECK-NEXT: br i1 [[TOBOOL_NOT]], label [[FOR_INC]], label [[IF_THEN:%.*]]
; CHECK: if.then:
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[I_08]]
; CHECK-NEXT: [[TMP13:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[I_08]]
; CHECK-NEXT: store i32 [[TMP13]], ptr [[ARRAYIDX1]], align 4
; CHECK-NEXT: br label [[FOR_INC]]
; CHECK: for.inc:
; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[I_08]], 1
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[INC]], [[N]]
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label [[EXIT]], label [[FOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %for.body
for.body: ; preds = %entry, %for.inc
%i.08 = phi i64 [ %inc, %for.inc ], [ 0, %entry ]
%and = and i64 %i.08, 1
%tobool.not = icmp eq i64 %and, 0
br i1 %tobool.not, label %for.inc, label %if.then
if.then: ; preds = %for.body
%arrayidx = getelementptr inbounds i32, ptr %b, i64 %i.08
%0 = load i32, ptr %arrayidx, align 4
%arrayidx1 = getelementptr inbounds i32, ptr %a, i64 %i.08
store i32 %0, ptr %arrayidx1, align 4
br label %for.inc
for.inc: ; preds = %for.body, %if.then
%inc = add nuw nsw i64 %i.08, 1
%exitcond.not = icmp eq i64 %inc, %n
br i1 %exitcond.not, label %exit, label %for.body, !llvm.loop !0
exit: ; preds = %for.inc
ret void
}
attributes #0 = { "target-features"="+sve" }
!0 = distinct !{!0, !1, !2, !3, !4, !5}
!1 = !{!"llvm.loop.mustprogress"}
!2 = !{!"llvm.loop.vectorize.scalable.enable", i1 true}
!3 = !{!"llvm.loop.vectorize.enable", i1 true}
!4 = !{!"llvm.loop.vectorize.width", i32 4}
!5 = !{!"llvm.loop.interleave.count", i32 1}
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