; LLVM IR from ARM-software/ML-examples :: cmsis-pack-examples/device/alif-ensemble/src/retarget.ll (write)

; 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"

@stdout = external global ptr, align 8

; Function Attrs: nounwind uwtable
declare dso_local i32 @fputc(i32 noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @_write(i32 noundef %0, ptr noundef %1, i32 noundef %2, i32 noundef %3) #0 {
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store i32 %0, ptr %6, align 4, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !9
  store i32 %2, ptr %8, align 4, !tbaa !5
  store i32 %3, ptr %9, align 4, !tbaa !5
  %12 = load i32, ptr %9, align 4, !tbaa !5
  %13 = load i32, ptr %6, align 4, !tbaa !5
  switch i32 %13, label %32 [
    i32 1, label %14
    i32 2, label %14
  ]

14:                                               ; preds = %4, %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  br label %15

15:                                               ; preds = %29, %14
  %16 = load i32, ptr %8, align 4, !tbaa !5
  %17 = add i32 %16, -1
  store i32 %17, ptr %8, align 4, !tbaa !5
  %18 = icmp ugt i32 %16, 0
  br i1 %18, label %19, label %30

19:                                               ; preds = %15
  %20 = load ptr, ptr %7, align 8, !tbaa !9
  %21 = getelementptr inbounds i8, ptr %20, i32 1
  store ptr %21, ptr %7, align 8, !tbaa !9
  %22 = load i8, ptr %20, align 1, !tbaa !11
  %23 = zext i8 %22 to i32
  %24 = load ptr, ptr @stdout, align 8, !tbaa !9
  %25 = call i32 @fputc(i32 noundef %23, ptr noundef %24)
  store i32 %25, ptr %10, align 4, !tbaa !5
  %26 = load i32, ptr %10, align 4, !tbaa !5
  %27 = icmp eq i32 %26, -1
  br i1 %27, label %28, label %29

28:                                               ; preds = %19
  store i32 -1, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %31

29:                                               ; preds = %19
  br label %15, !llvm.loop !12

30:                                               ; preds = %15
  store i32 0, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %31

31:                                               ; preds = %30, %28
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %33

32:                                               ; preds = %4
  store i32 -1, ptr %5, align 4
  br label %33

33:                                               ; preds = %32, %31
  %34 = load i32, ptr %5, align 4
  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 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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"

@stdout = external local_unnamed_addr global ptr, align 8

; Function Attrs: nofree nounwind uwtable
declare dso_local noundef i32 @fputc(i32 noundef, ptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: nofree nounwind uwtable
define dso_local range(i32 -1, 1) i32 @_write(i32 noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %.off = add i32 %0, -1
  %switch = icmp ult i32 %.off, 2
  br i1 %switch, label %.preheader, label %.loopexit

.preheader:                                       ; preds = %4, %5
  %.06 = phi i32 [ %6, %5 ], [ %2, %4 ]
  %.05 = phi ptr [ %7, %5 ], [ %1, %4 ]
  %.not = icmp eq i32 %.06, 0
  br i1 %.not, label %.loopexit, label %5

5:                                                ; preds = %.preheader
  %6 = add i32 %.06, -1
  %7 = getelementptr inbounds i8, ptr %.05, i64 1
  %8 = load i8, ptr %.05, align 1, !tbaa !5
  %9 = zext i8 %8 to i32
  %10 = load ptr, ptr @stdout, align 8, !tbaa !8
  %11 = tail call i32 @fputc(i32 noundef %9, ptr noundef %10)
  %12 = icmp eq i32 %11, -1
  br i1 %12, label %.loopexit, label %.preheader, !llvm.loop !10

.loopexit:                                        ; preds = %5, %.preheader, %4
  %.1 = phi i32 [ -1, %4 ], [ 0, %.preheader ], [ -1, %5 ]
  ret i32 %.1
}

attributes #0 = { nofree 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, !6, i64 0}
!6 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"any pointer", !6, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass