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[tests] precommit test for MachineLICM subloops
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@jaykang10
jaykang10 committed Jun 30, 2023
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188 changes: 188 additions & 0 deletions llvm/test/CodeGen/AArch64/machine-licm-sub-loop.ll
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
; RUN: llc -mtriple aarch64-none-linux-gnu < %s | FileCheck %s

; Function Attrs: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @foo(i32 noundef %limit, ptr nocapture noundef %out, ptr nocapture noundef readonly %y) local_unnamed_addr #0 {
; CHECK-LABEL: foo:
; CHECK: // %bb.0: // %entry
; CHECK-NEXT: // kill: def $w0 killed $w0 def $x0
; CHECK-NEXT: cmp w0, #1
; CHECK-NEXT: b.lt .LBB0_10
; CHECK-NEXT: // %bb.1: // %for.cond1.preheader.us.preheader
; CHECK-NEXT: mov w10, w0
; CHECK-NEXT: mov x8, xzr
; CHECK-NEXT: mov x9, xzr
; CHECK-NEXT: and x11, x10, #0xfffffff0
; CHECK-NEXT: add x12, x1, #32
; CHECK-NEXT: ubfiz x13, x0, #2, #32
; CHECK-NEXT: add x14, x2, #16
; CHECK-NEXT: b .LBB0_3
; CHECK-NEXT: .p2align 5, , 16
; CHECK-NEXT: .LBB0_2: // %for.cond1.for.cond.cleanup3_crit_edge.us
; CHECK-NEXT: // in Loop: Header=BB0_3 Depth=1
; CHECK-NEXT: add x9, x9, #1
; CHECK-NEXT: add x12, x12, x13
; CHECK-NEXT: add x8, x8, x10
; CHECK-NEXT: cmp x9, x10
; CHECK-NEXT: b.eq .LBB0_10
; CHECK-NEXT: .LBB0_3: // %for.cond1.preheader.us
; CHECK-NEXT: // =>This Loop Header: Depth=1
; CHECK-NEXT: // Child Loop BB0_6 Depth 2
; CHECK-NEXT: // Child Loop BB0_9 Depth 2
; CHECK-NEXT: ldrsh w15, [x2, x9, lsl #1]
; CHECK-NEXT: cmp w0, #16
; CHECK-NEXT: b.hs .LBB0_5
; CHECK-NEXT: // %bb.4: // in Loop: Header=BB0_3 Depth=1
; CHECK-NEXT: mov x18, xzr
; CHECK-NEXT: b .LBB0_8
; CHECK-NEXT: .p2align 5, , 16
; CHECK-NEXT: .LBB0_5: // %vector.ph
; CHECK-NEXT: // in Loop: Header=BB0_3 Depth=1
; CHECK-NEXT: mov x16, x14
; CHECK-NEXT: mov x17, x12
; CHECK-NEXT: mov x18, x11
; CHECK-NEXT: .p2align 5, , 16
; CHECK-NEXT: .LBB0_6: // %vector.body
; CHECK-NEXT: // Parent Loop BB0_3 Depth=1
; CHECK-NEXT: // => This Inner Loop Header: Depth=2
; CHECK-NEXT: dup v0.8h, w15
; CHECK-NEXT: subs x18, x18, #16
; CHECK-NEXT: ldp q1, q2, [x16, #-16]
; CHECK-NEXT: add x16, x16, #32
; CHECK-NEXT: ldp q4, q3, [x17, #-32]
; CHECK-NEXT: smlal v4.4s, v0.4h, v1.4h
; CHECK-NEXT: smlal2 v3.4s, v0.8h, v1.8h
; CHECK-NEXT: ldp q6, q5, [x17]
; CHECK-NEXT: smlal v6.4s, v0.4h, v2.4h
; CHECK-NEXT: smlal2 v5.4s, v0.8h, v2.8h
; CHECK-NEXT: stp q4, q3, [x17, #-32]
; CHECK-NEXT: stp q6, q5, [x17], #64
; CHECK-NEXT: b.ne .LBB0_6
; CHECK-NEXT: // %bb.7: // %middle.block
; CHECK-NEXT: // in Loop: Header=BB0_3 Depth=1
; CHECK-NEXT: cmp x11, x10
; CHECK-NEXT: mov x18, x11
; CHECK-NEXT: b.eq .LBB0_2
; CHECK-NEXT: .LBB0_8: // %for.body4.us.preheader
; CHECK-NEXT: // in Loop: Header=BB0_3 Depth=1
; CHECK-NEXT: add x17, x18, x8
; CHECK-NEXT: sub x16, x10, x18
; CHECK-NEXT: add x18, x2, x18, lsl #1
; CHECK-NEXT: add x17, x1, x17, lsl #2
; CHECK-NEXT: .p2align 5, , 16
; CHECK-NEXT: .LBB0_9: // %for.body4.us
; CHECK-NEXT: // Parent Loop BB0_3 Depth=1
; CHECK-NEXT: // => This Inner Loop Header: Depth=2
; CHECK-NEXT: ldrsh w3, [x18], #2
; CHECK-NEXT: subs x16, x16, #1
; CHECK-NEXT: ldr w4, [x17]
; CHECK-NEXT: madd w3, w3, w15, w4
; CHECK-NEXT: str w3, [x17], #4
; CHECK-NEXT: b.ne .LBB0_9
; CHECK-NEXT: b .LBB0_2
; CHECK-NEXT: .LBB0_10: // %for.cond.cleanup
; CHECK-NEXT: ret
entry:
%cmp26 = icmp sgt i32 %limit, 0
br i1 %cmp26, label %for.cond1.preheader.us.preheader, label %for.cond.cleanup

for.cond1.preheader.us.preheader: ; preds = %entry
%0 = zext i32 %limit to i64
%wide.trip.count34 = zext i32 %limit to i64
%min.iters.check = icmp ult i32 %limit, 16
%n.vec = and i64 %wide.trip.count34, 4294967280
%cmp.n = icmp eq i64 %n.vec, %wide.trip.count34
br label %for.cond1.preheader.us

for.cond1.preheader.us: ; preds = %for.cond1.preheader.us.preheader, %for.cond1.for.cond.cleanup3_crit_edge.us
%indvars.iv30 = phi i64 [ 0, %for.cond1.preheader.us.preheader ], [ %indvars.iv.next31, %for.cond1.for.cond.cleanup3_crit_edge.us ]
%arrayidx.us = getelementptr inbounds i16, ptr %y, i64 %indvars.iv30
%1 = load i16, ptr %arrayidx.us, align 2, !tbaa !6
%conv.us = sext i16 %1 to i32
%2 = mul nsw i64 %indvars.iv30, %0
br i1 %min.iters.check, label %for.body4.us.preheader, label %vector.ph

vector.ph: ; preds = %for.cond1.preheader.us
%broadcast.splatinsert = insertelement <8 x i32> poison, i32 %conv.us, i64 0
%broadcast.splat = shufflevector <8 x i32> %broadcast.splatinsert, <8 x i32> poison, <8 x i32> zeroinitializer
%broadcast.splatinsert37 = insertelement <8 x i32> poison, i32 %conv.us, i64 0
%broadcast.splat38 = shufflevector <8 x i32> %broadcast.splatinsert37, <8 x i32> poison, <8 x i32> zeroinitializer
br label %vector.body

vector.body: ; preds = %vector.body, %vector.ph
%index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
%3 = getelementptr inbounds i16, ptr %y, i64 %index
%wide.load = load <8 x i16>, ptr %3, align 2, !tbaa !6
%4 = getelementptr inbounds i16, ptr %3, i64 8
%wide.load36 = load <8 x i16>, ptr %4, align 2, !tbaa !6
%5 = sext <8 x i16> %wide.load to <8 x i32>
%6 = sext <8 x i16> %wide.load36 to <8 x i32>
%7 = mul nsw <8 x i32> %broadcast.splat, %5
%8 = mul nsw <8 x i32> %broadcast.splat38, %6
%9 = add nuw nsw i64 %index, %2
%10 = getelementptr inbounds i32, ptr %out, i64 %9
%wide.load39 = load <8 x i32>, ptr %10, align 4, !tbaa !10
%11 = getelementptr inbounds i32, ptr %10, i64 8
%wide.load40 = load <8 x i32>, ptr %11, align 4, !tbaa !10
%12 = add nsw <8 x i32> %7, %wide.load39
%13 = add nsw <8 x i32> %8, %wide.load40
store <8 x i32> %12, ptr %10, align 4, !tbaa !10
store <8 x i32> %13, ptr %11, align 4, !tbaa !10
%index.next = add nuw i64 %index, 16
%14 = icmp eq i64 %index.next, %n.vec
br i1 %14, label %middle.block, label %vector.body, !llvm.loop !12

middle.block: ; preds = %vector.body
br i1 %cmp.n, label %for.cond1.for.cond.cleanup3_crit_edge.us, label %for.body4.us.preheader

for.body4.us.preheader: ; preds = %for.cond1.preheader.us, %middle.block
%indvars.iv.ph = phi i64 [ 0, %for.cond1.preheader.us ], [ %n.vec, %middle.block ]
br label %for.body4.us

for.body4.us: ; preds = %for.body4.us.preheader, %for.body4.us
%indvars.iv = phi i64 [ %indvars.iv.next, %for.body4.us ], [ %indvars.iv.ph, %for.body4.us.preheader ]
%arrayidx6.us = getelementptr inbounds i16, ptr %y, i64 %indvars.iv
%15 = load i16, ptr %arrayidx6.us, align 2, !tbaa !6
%conv7.us = sext i16 %15 to i32
%mul.us = mul nsw i32 %conv7.us, %conv.us
%16 = add nuw nsw i64 %indvars.iv, %2
%arrayidx10.us = getelementptr inbounds i32, ptr %out, i64 %16
%17 = load i32, ptr %arrayidx10.us, align 4, !tbaa !10
%add11.us = add nsw i32 %mul.us, %17
store i32 %add11.us, ptr %arrayidx10.us, align 4, !tbaa !10
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count34
br i1 %exitcond.not, label %for.cond1.for.cond.cleanup3_crit_edge.us, label %for.body4.us, !llvm.loop !16

for.cond1.for.cond.cleanup3_crit_edge.us: ; preds = %for.body4.us, %middle.block
%indvars.iv.next31 = add nuw nsw i64 %indvars.iv30, 1
%exitcond35.not = icmp eq i64 %indvars.iv.next31, %wide.trip.count34
br i1 %exitcond35.not, label %for.cond.cleanup, label %for.cond1.preheader.us, !llvm.loop !17

for.cond.cleanup: ; preds = %for.cond1.for.cond.cleanup3_crit_edge.us, %entry
ret void
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable "frame-pointer"="non-leaf" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="neoverse-n1" "target-features"="+aes,+crc,+dotprod,+fp-armv8,+fullfp16,+lse,+neon,+outline-atomics,+ras,+rcpc,+rdm,+sha2,+spe,+ssbs,+v8.1a,+v8.2a,+v8a,-fmv" }

!llvm.module.flags = !{!0, !1, !2, !3, !4}
!llvm.ident = !{!5}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{i32 7, !"frame-pointer", i32 1}
!5 = !{!"clang version 17.0.0 (ssh://eu-gerrit-1.euhpc.arm.com:29418/dsg-dps/mirrors/llvm 2b55808b298965d2d49727b291198d4e2551d24a)"}
!6 = !{!7, !7, i64 0}
!7 = !{!"short", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!11, !11, i64 0}
!11 = !{!"int", !8, i64 0}
!12 = distinct !{!12, !13, !14, !15}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!"llvm.loop.isvectorized", i32 1}
!15 = !{!"llvm.loop.unroll.runtime.disable"}
!16 = distinct !{!16, !13, !15, !14}
!17 = distinct !{!17, !13}

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