; LLVM IR from AlgoGenesis/C :: Miscellaneous Algorithms/Power-Aware Disk Scheduling algorithm (PADS)

; 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"

; Function Attrs: nounwind uwtable
define dso_local void @sort_requests(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %60, %2
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = sub nsw i32 %11, 1
  %13 = icmp slt i32 %10, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %9
  store i32 2, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %63

15:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %16 = load i32, ptr %5, align 4, !tbaa !9
  %17 = add nsw i32 %16, 1
  store i32 %17, ptr %7, align 4, !tbaa !9
  br label %18

18:                                               ; preds = %56, %15
  %19 = load i32, ptr %7, align 4, !tbaa !9
  %20 = load i32, ptr %4, align 4, !tbaa !9
  %21 = icmp slt i32 %19, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %18
  store i32 5, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %59

23:                                               ; preds = %18
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = load i32, ptr %5, align 4, !tbaa !9
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds i32, ptr %24, i64 %26
  %28 = load i32, ptr %27, align 4, !tbaa !9
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = load i32, ptr %7, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds i32, ptr %29, i64 %31
  %33 = load i32, ptr %32, align 4, !tbaa !9
  %34 = icmp sgt i32 %28, %33
  br i1 %34, label %35, label %55

35:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %36 = load ptr, ptr %3, align 8, !tbaa !5
  %37 = load i32, ptr %5, align 4, !tbaa !9
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds i32, ptr %36, i64 %38
  %40 = load i32, ptr %39, align 4, !tbaa !9
  store i32 %40, ptr %8, align 4, !tbaa !9
  %41 = load ptr, ptr %3, align 8, !tbaa !5
  %42 = load i32, ptr %7, align 4, !tbaa !9
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds i32, ptr %41, i64 %43
  %45 = load i32, ptr %44, align 4, !tbaa !9
  %46 = load ptr, ptr %3, align 8, !tbaa !5
  %47 = load i32, ptr %5, align 4, !tbaa !9
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds i32, ptr %46, i64 %48
  store i32 %45, ptr %49, align 4, !tbaa !9
  %50 = load i32, ptr %8, align 4, !tbaa !9
  %51 = load ptr, ptr %3, align 8, !tbaa !5
  %52 = load i32, ptr %7, align 4, !tbaa !9
  %53 = sext i32 %52 to i64
  %54 = getelementptr inbounds i32, ptr %51, i64 %53
  store i32 %50, ptr %54, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %55

55:                                               ; preds = %35, %23
  br label %56

56:                                               ; preds = %55
  %57 = load i32, ptr %7, align 4, !tbaa !9
  %58 = add nsw i32 %57, 1
  store i32 %58, ptr %7, align 4, !tbaa !9
  br label %18, !llvm.loop !11

59:                                               ; preds = %22
  br label %60

60:                                               ; preds = %59
  %61 = load i32, ptr %5, align 4, !tbaa !9
  %62 = add nsw i32 %61, 1
  store i32 %62, ptr %5, align 4, !tbaa !9
  br label %9, !llvm.loop !13

63:                                               ; preds = %14
  ret void
}

; 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 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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"

; Function Attrs: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @sort_requests(ptr nocapture noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %1, 1
  br i1 %3, label %.lr.ph24.preheader, label %._crit_edge

.lr.ph24.preheader:                               ; preds = %2
  %4 = add nsw i32 %1, -1
  %wide.trip.count31 = zext nneg i32 %4 to i64
  %wide.trip.count = zext nneg i32 %1 to i64
  br label %.lr.ph

.loopexit:                                        ; preds = %12
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond32.not = icmp eq i64 %indvars.iv.next29, %wide.trip.count31
  br i1 %exitcond32.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

._crit_edge:                                      ; preds = %.loopexit, %2
  ret void

.lr.ph:                                           ; preds = %.loopexit, %.lr.ph24.preheader
  %indvars.iv28 = phi i64 [ 0, %.lr.ph24.preheader ], [ %indvars.iv.next29, %.loopexit ]
  %indvars.iv = phi i64 [ 1, %.lr.ph24.preheader ], [ %indvars.iv.next, %.loopexit ]
  %indvars.iv.next29 = add nuw nsw i64 %indvars.iv28, 1
  %5 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv28
  br label %6

6:                                                ; preds = %.lr.ph, %12
  %indvars.iv25 = phi i64 [ %indvars.iv, %.lr.ph ], [ %indvars.iv.next26, %12 ]
  %7 = load i32, ptr %5, align 4, !tbaa !7
  %8 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv25
  %9 = load i32, ptr %8, align 4, !tbaa !7
  %10 = icmp sgt i32 %7, %9
  br i1 %10, label %11, label %12

11:                                               ; preds = %6
  store i32 %9, ptr %5, align 4, !tbaa !7
  store i32 %7, ptr %8, align 4, !tbaa !7
  br label %12

12:                                               ; preds = %6, %11
  %indvars.iv.next26 = add nuw nsw i64 %indvars.iv25, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next26, %wide.trip.count
  br i1 %exitcond.not, label %.loopexit, label %6, !llvm.loop !11
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) 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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C/C++ TBAA"}
!11 = distinct !{!11, !6}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass