; LLVM IR from upupming/algorithm :: CCCC-GPLT/L1-048 矩阵A乘以B.ll (Z1fii)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@a = external dso_local global [110 x [110 x i32]], align 16
@b = external dso_local global [110 x [110 x i32]], align 16
@ca = external dso_local global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z1fii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %30, %2
  %8 = load i32, ptr %6, align 4, !tbaa !5
  %9 = load i32, ptr @ca, align 4, !tbaa !5
  %10 = icmp sle i32 %8, %9
  br i1 %10, label %12, label %11

11:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %33

12:                                               ; preds = %7
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [110 x [110 x i32]], ptr @a, i64 0, i64 %14
  %16 = load i32, ptr %6, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [110 x i32], ptr %15, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = load i32, ptr %6, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [110 x [110 x i32]], ptr @b, i64 0, i64 %21
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [110 x i32], ptr %22, i64 0, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = mul nsw i32 %19, %26
  %28 = load i32, ptr %5, align 4, !tbaa !5
  %29 = add nsw i32 %28, %27
  store i32 %29, ptr %5, align 4, !tbaa !5
  br label %30

30:                                               ; preds = %12
  %31 = load i32, ptr %6, align 4, !tbaa !5
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %6, align 4, !tbaa !5
  br label %7, !llvm.loop !9

33:                                               ; preds = %11
  %34 = load i32, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %34
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind }

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

!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 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@a = external dso_local local_unnamed_addr global [110 x [110 x i32]], align 16
@b = external dso_local local_unnamed_addr global [110 x [110 x i32]], align 16
@ca = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z1fii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = load i32, ptr @ca, align 4, !tbaa !5
  %.not9 = icmp slt i32 %3, 1
  br i1 %.not9, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %4 = sext i32 %0 to i64
  %5 = sext i32 %1 to i64
  %6 = add nuw i32 %3, 1
  %wide.trip.count = zext i32 %6 to i64
  %7 = zext nneg i32 %3 to i64
  %min.iters.check = icmp ult i32 %3, 8
  br i1 %min.iters.check, label %scalar.ph.preheader, label %vector.ph

scalar.ph.preheader:                              ; preds = %middle.block, %.lr.ph
  %indvars.iv.ph = phi i64 [ 1, %.lr.ph ], [ %ind.end, %middle.block ]
  %.0810.ph = phi i32 [ 0, %.lr.ph ], [ %46, %middle.block ]
  br label %scalar.ph

vector.ph:                                        ; preds = %.lr.ph
  %n.vec = and i64 %7, 2147483640
  %ind.end = or disjoint i64 %n.vec, 1
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.phi = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %43, %vector.body ]
  %vec.phi13 = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %44, %vector.body ]
  %offset.idx = or disjoint i64 %index, 1
  %8 = or disjoint i64 %index, 2
  %9 = or disjoint i64 %index, 3
  %10 = or disjoint i64 %index, 4
  %11 = or disjoint i64 %index, 5
  %12 = or disjoint i64 %index, 6
  %13 = or disjoint i64 %index, 7
  %14 = add i64 %index, 8
  %15 = getelementptr inbounds [110 x [110 x i32]], ptr @a, i64 0, i64 %4, i64 %offset.idx
  %16 = getelementptr inbounds i8, ptr %15, i64 16
  %wide.load = load <4 x i32>, ptr %15, align 4, !tbaa !5
  %wide.load14 = load <4 x i32>, ptr %16, align 4, !tbaa !5
  %17 = getelementptr inbounds [110 x [110 x i32]], ptr @b, i64 0, i64 %offset.idx, i64 %5
  %18 = getelementptr inbounds [110 x [110 x i32]], ptr @b, i64 0, i64 %8, i64 %5
  %19 = getelementptr inbounds [110 x [110 x i32]], ptr @b, i64 0, i64 %9, i64 %5
  %20 = getelementptr inbounds [110 x [110 x i32]], ptr @b, i64 0, i64 %10, i64 %5
  %21 = getelementptr inbounds [110 x [110 x i32]], ptr @b, i64 0, i64 %11, i64 %5
  %22 = getelementptr inbounds [110 x [110 x i32]], ptr @b, i64 0, i64 %12, i64 %5
  %23 = getelementptr inbounds [110 x [110 x i32]], ptr @b, i64 0, i64 %13, i64 %5
  %24 = getelementptr inbounds [110 x [110 x i32]], ptr @b, i64 0, i64 %14, i64 %5
  %25 = load i32, ptr %17, align 4, !tbaa !5
  %26 = load i32, ptr %18, align 4, !tbaa !5
  %27 = load i32, ptr %19, align 4, !tbaa !5
  %28 = load i32, ptr %20, align 4, !tbaa !5
  %29 = insertelement <4 x i32> poison, i32 %25, i64 0
  %30 = insertelement <4 x i32> %29, i32 %26, i64 1
  %31 = insertelement <4 x i32> %30, i32 %27, i64 2
  %32 = insertelement <4 x i32> %31, i32 %28, i64 3
  %33 = load i32, ptr %21, align 4, !tbaa !5
  %34 = load i32, ptr %22, align 4, !tbaa !5
  %35 = load i32, ptr %23, align 4, !tbaa !5
  %36 = load i32, ptr %24, align 4, !tbaa !5
  %37 = insertelement <4 x i32> poison, i32 %33, i64 0
  %38 = insertelement <4 x i32> %37, i32 %34, i64 1
  %39 = insertelement <4 x i32> %38, i32 %35, i64 2
  %40 = insertelement <4 x i32> %39, i32 %36, i64 3
  %41 = mul nsw <4 x i32> %32, %wide.load
  %42 = mul nsw <4 x i32> %40, %wide.load14
  %43 = add <4 x i32> %41, %vec.phi
  %44 = add <4 x i32> %42, %vec.phi13
  %index.next = add nuw i64 %index, 8
  %45 = icmp eq i64 %index.next, %n.vec
  br i1 %45, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %bin.rdx = add <4 x i32> %44, %43
  %46 = tail call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> %bin.rdx)
  %cmp.n = icmp eq i64 %n.vec, %7
  br i1 %cmp.n, label %._crit_edge, label %scalar.ph.preheader

._crit_edge:                                      ; preds = %scalar.ph, %middle.block, %2
  %.08.lcssa = phi i32 [ 0, %2 ], [ %46, %middle.block ], [ %52, %scalar.ph ]
  ret i32 %.08.lcssa

scalar.ph:                                        ; preds = %scalar.ph.preheader, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %scalar.ph ], [ %indvars.iv.ph, %scalar.ph.preheader ]
  %.0810 = phi i32 [ %52, %scalar.ph ], [ %.0810.ph, %scalar.ph.preheader ]
  %47 = getelementptr inbounds [110 x [110 x i32]], ptr @a, i64 0, i64 %4, i64 %indvars.iv
  %48 = load i32, ptr %47, align 4, !tbaa !5
  %49 = getelementptr inbounds [110 x [110 x i32]], ptr @b, i64 0, i64 %indvars.iv, i64 %5
  %50 = load i32, ptr %49, align 4, !tbaa !5
  %51 = mul nsw i32 %50, %48
  %52 = add nsw i32 %51, %.0810
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %scalar.ph, !llvm.loop !13
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.add.v4i32(<4 x i32>) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

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

!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 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !12, !11}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass