; LLVM IR from introlab/odas :: src/utils (random)

; 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"

%struct.random_obj = type { i32, i32, ptr, ptr }

; 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 @random_pdf(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca float, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store float 0.000000e+00, ptr %6, align 4, !tbaa !9
  store i32 0, ptr %5, align 4, !tbaa !11
  br label %7

7:                                                ; preds = %39, %2
  %8 = load i32, ptr %5, align 4, !tbaa !11
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.random_obj, ptr %9, i32 0, i32 0
  %11 = load i32, ptr %10, align 8, !tbaa !13
  %12 = icmp ult i32 %8, %11
  br i1 %12, label %13, label %42

13:                                               ; preds = %7
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = load i32, ptr %5, align 4, !tbaa !11
  %16 = zext i32 %15 to i64
  %17 = getelementptr inbounds float, ptr %14, i64 %16
  %18 = load float, ptr %17, align 4, !tbaa !9
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.random_obj, ptr %19, i32 0, i32 2
  %21 = load ptr, ptr %20, align 8, !tbaa !15
  %22 = load i32, ptr %5, align 4, !tbaa !11
  %23 = zext i32 %22 to i64
  %24 = getelementptr inbounds float, ptr %21, i64 %23
  store float %18, ptr %24, align 4, !tbaa !9
  %25 = load float, ptr %6, align 4, !tbaa !9
  %26 = load ptr, ptr %3, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.random_obj, ptr %26, i32 0, i32 3
  %28 = load ptr, ptr %27, align 8, !tbaa !16
  %29 = load i32, ptr %5, align 4, !tbaa !11
  %30 = zext i32 %29 to i64
  %31 = getelementptr inbounds float, ptr %28, i64 %30
  store float %25, ptr %31, align 4, !tbaa !9
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  %33 = load i32, ptr %5, align 4, !tbaa !11
  %34 = zext i32 %33 to i64
  %35 = getelementptr inbounds float, ptr %32, i64 %34
  %36 = load float, ptr %35, align 4, !tbaa !9
  %37 = load float, ptr %6, align 4, !tbaa !9
  %38 = fadd float %37, %36
  store float %38, ptr %6, align 4, !tbaa !9
  br label %39

39:                                               ; preds = %13
  %40 = load i32, ptr %5, align 4, !tbaa !11
  %41 = add i32 %40, 1
  store i32 %41, ptr %5, align 4, !tbaa !11
  br label %7, !llvm.loop !17

42:                                               ; preds = %7
  %43 = load float, ptr %6, align 4, !tbaa !9
  %44 = load ptr, ptr %3, align 8, !tbaa !5
  %45 = getelementptr inbounds %struct.random_obj, ptr %44, i32 0, i32 3
  %46 = load ptr, ptr %45, align 8, !tbaa !16
  %47 = load ptr, ptr %3, align 8, !tbaa !5
  %48 = getelementptr inbounds %struct.random_obj, ptr %47, i32 0, i32 0
  %49 = load i32, ptr %48, align 8, !tbaa !13
  %50 = zext i32 %49 to i64
  %51 = getelementptr inbounds float, ptr %46, i64 %50
  store float %43, ptr %51, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret void
}

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 }

!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 = !{!"float", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!14, !12, i64 0}
!14 = !{!"random_obj", !12, i64 0, !12, i64 4, !6, i64 8, !6, i64 16}
!15 = !{!14, !6, i64 8}
!16 = !{!14, !6, i64 16}
!17 = distinct !{!17, !18}
!18 = !{!"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: nofree norecurse nosync nounwind memory(write, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local void @random_pdf(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = load i32, ptr %0, align 8, !tbaa !5
  %.not = icmp eq i32 %3, 0
  br i1 %.not, label %.._crit_edge_crit_edge, label %.lr.ph

.._crit_edge_crit_edge:                           ; preds = %2
  %.phi.trans.insert = getelementptr inbounds i8, ptr %0, i64 16
  %.pre = load ptr, ptr %.phi.trans.insert, align 8, !tbaa !11
  br label %._crit_edge

.lr.ph:                                           ; preds = %2
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load ptr, ptr %4, align 8, !tbaa !12
  %6 = getelementptr inbounds i8, ptr %0, i64 16
  %7 = load ptr, ptr %6, align 8, !tbaa !11
  %wide.trip.count = zext i32 %3 to i64
  %xtraiter = and i64 %wide.trip.count, 1
  %8 = icmp eq i32 %3, 1
  br i1 %8, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.new

.lr.ph.new:                                       ; preds = %.lr.ph
  %unroll_iter = and i64 %wide.trip.count, 4294967294
  br label %9

9:                                                ; preds = %9, %.lr.ph.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.new ], [ %indvars.iv.next.1, %9 ]
  %.018 = phi float [ 0.000000e+00, %.lr.ph.new ], [ %21, %9 ]
  %niter = phi i64 [ 0, %.lr.ph.new ], [ %niter.next.1, %9 ]
  %10 = getelementptr inbounds float, ptr %1, i64 %indvars.iv
  %11 = load float, ptr %10, align 4, !tbaa !13
  %12 = getelementptr inbounds float, ptr %5, i64 %indvars.iv
  store float %11, ptr %12, align 4, !tbaa !13
  %13 = getelementptr inbounds float, ptr %7, i64 %indvars.iv
  store float %.018, ptr %13, align 4, !tbaa !13
  %14 = load float, ptr %10, align 4, !tbaa !13
  %15 = fadd float %.018, %14
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %16 = getelementptr inbounds float, ptr %1, i64 %indvars.iv.next
  %17 = load float, ptr %16, align 4, !tbaa !13
  %18 = getelementptr inbounds float, ptr %5, i64 %indvars.iv.next
  store float %17, ptr %18, align 4, !tbaa !13
  %19 = getelementptr inbounds float, ptr %7, i64 %indvars.iv.next
  store float %15, ptr %19, align 4, !tbaa !13
  %20 = load float, ptr %16, align 4, !tbaa !13
  %21 = fadd float %15, %20
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge.loopexit.unr-lcssa, label %9, !llvm.loop !15

._crit_edge.loopexit.unr-lcssa:                   ; preds = %9, %.lr.ph
  %.lcssa.ph = phi float [ poison, %.lr.ph ], [ %21, %9 ]
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next.1, %9 ]
  %.018.unr = phi float [ 0.000000e+00, %.lr.ph ], [ %21, %9 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %._crit_edge.loopexit.epilog-lcssa

._crit_edge.loopexit.epilog-lcssa:                ; preds = %._crit_edge.loopexit.unr-lcssa
  %22 = getelementptr inbounds float, ptr %1, i64 %indvars.iv.unr
  %23 = load float, ptr %22, align 4, !tbaa !13
  %24 = getelementptr inbounds float, ptr %5, i64 %indvars.iv.unr
  store float %23, ptr %24, align 4, !tbaa !13
  %25 = getelementptr inbounds float, ptr %7, i64 %indvars.iv.unr
  store float %.018.unr, ptr %25, align 4, !tbaa !13
  %26 = load float, ptr %22, align 4, !tbaa !13
  %27 = fadd float %.018.unr, %26
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit.epilog-lcssa, %._crit_edge.loopexit.unr-lcssa, %.._crit_edge_crit_edge
  %.pre-phi = phi i64 [ 0, %.._crit_edge_crit_edge ], [ %wide.trip.count, %._crit_edge.loopexit.unr-lcssa ], [ %wide.trip.count, %._crit_edge.loopexit.epilog-lcssa ]
  %28 = phi ptr [ %.pre, %.._crit_edge_crit_edge ], [ %7, %._crit_edge.loopexit.unr-lcssa ], [ %7, %._crit_edge.loopexit.epilog-lcssa ]
  %.0.lcssa = phi float [ 0.000000e+00, %.._crit_edge_crit_edge ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %27, %._crit_edge.loopexit.epilog-lcssa ]
  %29 = getelementptr inbounds float, ptr %28, i64 %.pre-phi
  store float %.0.lcssa, ptr %29, align 4, !tbaa !13
  ret void
}

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

!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, !7, i64 0}
!6 = !{!"random_obj", !7, i64 0, !7, i64 4, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 16}
!12 = !{!6, !10, i64 8}
!13 = !{!14, !14, i64 0}
!14 = !{!"float", !8, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}


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