; LLVM IR from attractivechaos/klib :: test (ksort_test)

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local void @ks_shuffle_int(i64 noundef %0, ptr noundef %1) #1 {
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %8 = load i64, ptr %3, align 8, !tbaa !5
  %9 = trunc i64 %8 to i32
  store i32 %9, ptr %5, align 4, !tbaa !11
  br label %10

10:                                               ; preds = %40, %2
  %11 = load i32, ptr %5, align 4, !tbaa !11
  %12 = icmp sgt i32 %11, 1
  br i1 %12, label %13, label %43

13:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %14 = call double @drand48() #3
  %15 = load i32, ptr %5, align 4, !tbaa !11
  %16 = sitofp i32 %15 to double
  %17 = fmul double %14, %16
  %18 = fptosi double %17 to i32
  store i32 %18, ptr %6, align 4, !tbaa !11
  %19 = load ptr, ptr %4, align 8, !tbaa !9
  %20 = load i32, ptr %6, align 4, !tbaa !11
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds i32, ptr %19, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !11
  store i32 %23, ptr %7, align 4, !tbaa !11
  %24 = load ptr, ptr %4, align 8, !tbaa !9
  %25 = load i32, ptr %5, align 4, !tbaa !11
  %26 = sub nsw i32 %25, 1
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds i32, ptr %24, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !11
  %30 = load ptr, ptr %4, align 8, !tbaa !9
  %31 = load i32, ptr %6, align 4, !tbaa !11
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds i32, ptr %30, i64 %32
  store i32 %29, ptr %33, align 4, !tbaa !11
  %34 = load i32, ptr %7, align 4, !tbaa !11
  %35 = load ptr, ptr %4, align 8, !tbaa !9
  %36 = load i32, ptr %5, align 4, !tbaa !11
  %37 = sub nsw i32 %36, 1
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds i32, ptr %35, i64 %38
  store i32 %34, ptr %39, align 4, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %40

40:                                               ; preds = %13
  %41 = load i32, ptr %5, align 4, !tbaa !11
  %42 = add nsw i32 %41, -1
  store i32 %42, ptr %5, align 4, !tbaa !11
  br label %10, !llvm.loop !13

43:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret void
}

; Function Attrs: nounwind
declare double @drand48() #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { nounwind "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 #3 = { 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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"

; Function Attrs: nounwind uwtable
define dso_local void @ks_shuffle_int(i64 noundef %0, ptr nocapture noundef %1) local_unnamed_addr #0 {
  %3 = trunc i64 %0 to i32
  %invariant.gep = getelementptr i8, ptr %1, i64 -4
  %4 = icmp sgt i32 %3, 1
  br i1 %4, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %5 = and i64 %0, 2147483647
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ %5, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %6 = tail call double @drand48() #2
  %7 = trunc nuw nsw i64 %indvars.iv to i32
  %8 = uitofp nneg i32 %7 to double
  %9 = fmul double %6, %8
  %10 = fptosi double %9 to i32
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds i32, ptr %1, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %gep = getelementptr i32, ptr %invariant.gep, i64 %indvars.iv
  %14 = load i32, ptr %gep, align 4, !tbaa !5
  store i32 %14, ptr %12, align 4, !tbaa !5
  store i32 %13, ptr %gep, align 4, !tbaa !5
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %15 = icmp ugt i64 %indvars.iv, 2
  br i1 %15, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %2
  ret void
}

; Function Attrs: nounwind
declare double @drand48() local_unnamed_addr #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 = { nounwind "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 #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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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