; LLVM IR from whoiswelliton/Computer_Engineering_UTFPR-PB :: Embedded_Systems/TIVA Connected TM4C1294XL Projects/01 - lwIP_HTTPServer_on_TIVA (osRecursiveMutexWait)

; 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 i32 @osRecursiveMutexWait(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = 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 4, ptr %6) #3
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = icmp eq ptr %8, null
  br i1 %9, label %10, label %11

10:                                               ; preds = %2
  store i32 128, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %33

11:                                               ; preds = %2
  store i32 0, ptr %6, align 4, !tbaa !9
  %12 = load i32, ptr %5, align 4, !tbaa !9
  %13 = icmp eq i32 %12, -1
  br i1 %13, label %14, label %15

14:                                               ; preds = %11
  store i32 -1, ptr %6, align 4, !tbaa !9
  br label %26

15:                                               ; preds = %11
  %16 = load i32, ptr %5, align 4, !tbaa !9
  %17 = icmp ne i32 %16, 0
  br i1 %17, label %18, label %25

18:                                               ; preds = %15
  %19 = load i32, ptr %5, align 4, !tbaa !9
  %20 = udiv i32 %19, 1
  store i32 %20, ptr %6, align 4, !tbaa !9
  %21 = load i32, ptr %6, align 4, !tbaa !9
  %22 = icmp eq i32 %21, 0
  br i1 %22, label %23, label %24

23:                                               ; preds = %18
  store i32 1, ptr %6, align 4, !tbaa !9
  br label %24

24:                                               ; preds = %23, %18
  br label %25

25:                                               ; preds = %24, %15
  br label %26

26:                                               ; preds = %25, %14
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = load i32, ptr %6, align 4, !tbaa !9
  %29 = call i64 @xQueueTakeMutexRecursive(ptr noundef %27, i32 noundef %28)
  %30 = icmp ne i64 %29, 1
  br i1 %30, label %31, label %32

31:                                               ; preds = %26
  store i32 255, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %33

32:                                               ; preds = %26
  store i32 0, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %33

33:                                               ; preds = %32, %31, %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %34 = load i32, ptr %3, align 4
  ret i32 %34
}

declare i64 @xQueueTakeMutexRecursive(ptr noundef, i32 noundef) #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 = { "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 = !{!"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}


; 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 range(i32 0, 256) i32 @osRecursiveMutexWait(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %0, null
  br i1 %3, label %5, label %.fold.split

.fold.split:                                      ; preds = %2
  %4 = tail call i64 @xQueueTakeMutexRecursive(ptr noundef nonnull %0, i32 noundef %1) #2
  %.not10 = icmp eq i64 %4, 1
  %. = select i1 %.not10, i32 0, i32 255
  br label %5

5:                                                ; preds = %.fold.split, %2
  %.07 = phi i32 [ 128, %2 ], [ %., %.fold.split ]
  ret i32 %.07
}

declare i64 @xQueueTakeMutexRecursive(ptr noundef, i32 noundef) 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 = { "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)"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass