; LLVM IR from 0intro/wmii :: lib/libfmt/dofmt.ll_ (rfmtpad)

; 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.Fmt = type { i8, ptr, ptr, ptr, ptr, ptr, i32, [1 x %struct.__va_list_tag], i32, i32, i32, i64, ptr, ptr, ptr }
%struct.__va_list_tag = 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: nounwind uwtable
declare dso_local ptr @__fmtflush(ptr noundef, ptr noundef, i32 noundef) #1

; 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 i32 @__rfmtpad(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.Fmt, ptr %10, i32 0, i32 2
  %12 = load ptr, ptr %11, align 8, !tbaa !11
  store ptr %12, ptr %6, align 8, !tbaa !5
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.Fmt, ptr %13, i32 0, i32 3
  %15 = load ptr, ptr %14, align 8, !tbaa !14
  store ptr %15, ptr %7, align 8, !tbaa !5
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %16

16:                                               ; preds = %43, %2
  %17 = load i32, ptr %8, align 4, !tbaa !9
  %18 = load i32, ptr %5, align 4, !tbaa !9
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %20, label %46

20:                                               ; preds = %16
  br label %21

21:                                               ; preds = %20
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = getelementptr inbounds i32, ptr %22, i64 1
  %24 = load ptr, ptr %7, align 8, !tbaa !5
  %25 = icmp ugt ptr %23, %24
  br i1 %25, label %26, label %38

26:                                               ; preds = %21
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = load ptr, ptr %6, align 8, !tbaa !5
  %29 = call ptr @__fmtflush(ptr noundef %27, ptr noundef %28, i32 noundef 4)
  store ptr %29, ptr %6, align 8, !tbaa !5
  %30 = load ptr, ptr %6, align 8, !tbaa !5
  %31 = icmp ne ptr %30, null
  br i1 %31, label %32, label %36

32:                                               ; preds = %26
  %33 = load ptr, ptr %4, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.Fmt, ptr %33, i32 0, i32 3
  %35 = load ptr, ptr %34, align 8, !tbaa !14
  store ptr %35, ptr %7, align 8, !tbaa !5
  br label %37

36:                                               ; preds = %26
  store i32 -1, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %64

37:                                               ; preds = %32
  br label %38

38:                                               ; preds = %37, %21
  %39 = load ptr, ptr %6, align 8, !tbaa !5
  %40 = getelementptr inbounds i32, ptr %39, i32 1
  store ptr %40, ptr %6, align 8, !tbaa !5
  store i32 32, ptr %39, align 4, !tbaa !9
  br label %41

41:                                               ; preds = %38
  br label %42

42:                                               ; preds = %41
  br label %43

43:                                               ; preds = %42
  %44 = load i32, ptr %8, align 4, !tbaa !9
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %8, align 4, !tbaa !9
  br label %16, !llvm.loop !15

46:                                               ; preds = %16
  %47 = load ptr, ptr %6, align 8, !tbaa !5
  %48 = load ptr, ptr %4, align 8, !tbaa !5
  %49 = getelementptr inbounds %struct.Fmt, ptr %48, i32 0, i32 2
  %50 = load ptr, ptr %49, align 8, !tbaa !11
  %51 = ptrtoint ptr %47 to i64
  %52 = ptrtoint ptr %50 to i64
  %53 = sub i64 %51, %52
  %54 = sdiv exact i64 %53, 4
  %55 = load ptr, ptr %4, align 8, !tbaa !5
  %56 = getelementptr inbounds %struct.Fmt, ptr %55, i32 0, i32 6
  %57 = load i32, ptr %56, align 8, !tbaa !17
  %58 = sext i32 %57 to i64
  %59 = add nsw i64 %58, %54
  %60 = trunc i64 %59 to i32
  store i32 %60, ptr %56, align 8, !tbaa !17
  %61 = load ptr, ptr %6, align 8, !tbaa !5
  %62 = load ptr, ptr %4, align 8, !tbaa !5
  %63 = getelementptr inbounds %struct.Fmt, ptr %62, i32 0, i32 2
  store ptr %61, ptr %63, align 8, !tbaa !11
  store i32 0, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %64

64:                                               ; preds = %46, %36
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %65 = load i32, ptr %3, align 4
  ret i32 %65
}

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 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 16}
!12 = !{!"Fmt", !7, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !10, i64 48, !7, i64 56, !10, i64 80, !10, i64 84, !10, i64 88, !13, i64 96, !6, i64 104, !6, i64 112, !6, i64 120}
!13 = !{!"long", !7, i64 0}
!14 = !{!12, !6, i64 24}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}
!17 = !{!12, !10, i64 48}


; 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
declare dso_local ptr @__fmtflush(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local range(i32 -1, 1) i32 @__rfmtpad(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 16
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %0, i64 24
  %6 = icmp sgt i32 %1, 0
  br i1 %6, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %7 = load ptr, ptr %5, align 8, !tbaa !12
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %14
  %.025 = phi i32 [ %16, %14 ], [ 0, %.lr.ph.preheader ]
  %.01724 = phi ptr [ %.1, %14 ], [ %7, %.lr.ph.preheader ]
  %.01823 = phi ptr [ %15, %14 ], [ %4, %.lr.ph.preheader ]
  %8 = getelementptr inbounds i8, ptr %.01823, i64 4
  %9 = icmp ugt ptr %8, %.01724
  br i1 %9, label %10, label %14

10:                                               ; preds = %.lr.ph
  %11 = tail call ptr @__fmtflush(ptr noundef %0, ptr noundef %.01823, i32 noundef 4)
  %.not = icmp eq ptr %11, null
  br i1 %.not, label %.loopexit, label %12

12:                                               ; preds = %10
  %13 = load ptr, ptr %5, align 8, !tbaa !12
  br label %14

14:                                               ; preds = %12, %.lr.ph
  %.119 = phi ptr [ %11, %12 ], [ %.01823, %.lr.ph ]
  %.1 = phi ptr [ %13, %12 ], [ %.01724, %.lr.ph ]
  %15 = getelementptr inbounds i8, ptr %.119, i64 4
  store i32 32, ptr %.119, align 4, !tbaa !13
  %16 = add nuw nsw i32 %.025, 1
  %exitcond.not = icmp eq i32 %16, %1
  br i1 %exitcond.not, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !14

._crit_edge.loopexit:                             ; preds = %14
  %.pre = load ptr, ptr %3, align 8, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %2
  %17 = phi ptr [ %4, %2 ], [ %.pre, %._crit_edge.loopexit ]
  %.018.lcssa = phi ptr [ %4, %2 ], [ %15, %._crit_edge.loopexit ]
  %18 = ptrtoint ptr %.018.lcssa to i64
  %19 = ptrtoint ptr %17 to i64
  %20 = sub i64 %18, %19
  %21 = lshr exact i64 %20, 2
  %22 = getelementptr inbounds i8, ptr %0, i64 48
  %23 = load i32, ptr %22, align 8, !tbaa !16
  %24 = trunc i64 %21 to i32
  %25 = add i32 %23, %24
  store i32 %25, ptr %22, align 8, !tbaa !16
  store ptr %.018.lcssa, ptr %3, align 8, !tbaa !5
  br label %.loopexit

.loopexit:                                        ; preds = %10, %._crit_edge
  %.020 = phi i32 [ 0, %._crit_edge ], [ -1, %10 ]
  ret i32 %.020
}

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" }

!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, !9, i64 16}
!6 = !{!"Fmt", !7, i64 0, !9, i64 8, !9, i64 16, !9, i64 24, !9, i64 32, !9, i64 40, !10, i64 48, !7, i64 56, !10, i64 80, !10, i64 84, !10, i64 88, !11, i64 96, !9, i64 104, !9, i64 112, !9, i64 120}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"any pointer", !7, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!"long", !7, i64 0}
!12 = !{!6, !9, i64 24}
!13 = !{!10, !10, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}
!16 = !{!6, !10, i64 48}


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