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

; 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.osEvent = type { i32, %union.anon, %union.anon.0 }
%union.anon = type { ptr }
%union.anon.0 = type { 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 i32 @sys_arch_mbox_fetch(ptr noundef %0, ptr noundef %1, i32 noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca %struct.osEvent, align 8
  %9 = alloca i32, align 4
  %10 = alloca %struct.osEvent, align 8
  %11 = alloca i32, align 4
  %12 = alloca %struct.osEvent, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 24, ptr %8) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #4
  %13 = call i32 @osKernelSysTick()
  store i32 %13, ptr %9, align 4, !tbaa !9
  %14 = load i32, ptr %7, align 4, !tbaa !9
  %15 = icmp ne i32 %14, 0
  br i1 %15, label %16, label %33

16:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 24, ptr %10) #4
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = load ptr, ptr %17, align 8, !tbaa !5
  %19 = load i32, ptr %7, align 4, !tbaa !9
  call void @osMessageGet(ptr dead_on_unwind writable sret(%struct.osEvent) align 8 %10, ptr noundef %18, i32 noundef %19)
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %8, ptr align 8 %10, i64 24, i1 false), !tbaa.struct !11
  call void @llvm.lifetime.end.p0(i64 24, ptr %10) #4
  %20 = getelementptr inbounds %struct.osEvent, ptr %8, i32 0, i32 0
  %21 = load i32, ptr %20, align 8, !tbaa !13
  %22 = icmp eq i32 %21, 16
  br i1 %22, label %23, label %32

23:                                               ; preds = %16
  %24 = getelementptr inbounds %struct.osEvent, ptr %8, i32 0, i32 1
  %25 = load i32, ptr %24, align 8, !tbaa !12
  %26 = zext i32 %25 to i64
  %27 = inttoptr i64 %26 to ptr
  %28 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %27, ptr %28, align 8, !tbaa !5
  %29 = call i32 @osKernelSysTick()
  %30 = load i32, ptr %9, align 4, !tbaa !9
  %31 = sub i32 %29, %30
  store i32 %31, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %44

32:                                               ; preds = %16
  store i32 -1, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %44

33:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 24, ptr %12) #4
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = load ptr, ptr %34, align 8, !tbaa !5
  call void @osMessageGet(ptr dead_on_unwind writable sret(%struct.osEvent) align 8 %12, ptr noundef %35, i32 noundef -1)
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %8, ptr align 8 %12, i64 24, i1 false), !tbaa.struct !11
  call void @llvm.lifetime.end.p0(i64 24, ptr %12) #4
  %36 = getelementptr inbounds %struct.osEvent, ptr %8, i32 0, i32 1
  %37 = load i32, ptr %36, align 8, !tbaa !12
  %38 = zext i32 %37 to i64
  %39 = inttoptr i64 %38 to ptr
  %40 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %39, ptr %40, align 8, !tbaa !5
  %41 = call i32 @osKernelSysTick()
  %42 = load i32, ptr %9, align 4, !tbaa !9
  %43 = sub i32 %41, %42
  store i32 %43, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %44

44:                                               ; preds = %33, %32, %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #4
  call void @llvm.lifetime.end.p0(i64 24, ptr %8) #4
  %45 = load i32, ptr %4, align 4
  ret i32 %45
}

declare i32 @osKernelSysTick() #2

declare void @osMessageGet(ptr dead_on_unwind writable sret(%struct.osEvent) align 8, ptr noundef, i32 noundef) #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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 = !{i64 0, i64 4, !9, i64 8, i64 8, !12, i64 16, i64 8, !12}
!12 = !{!7, !7, i64 0}
!13 = !{!14, !10, i64 0}
!14 = !{!"", !10, i64 0, !7, i64 8, !7, i64 16}


; 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"

%struct.osEvent = type { i32, %union.anon, %union.anon.0 }
%union.anon = type { ptr }
%union.anon.0 = type { ptr }

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

; Function Attrs: mustprogress 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 @sys_arch_mbox_fetch(ptr nocapture noundef readonly %0, ptr nocapture noundef writeonly %1, i32 noundef %2) local_unnamed_addr #1 {
  %4 = alloca %struct.osEvent, align 8
  %5 = alloca %struct.osEvent, align 8
  %6 = tail call i32 @osKernelSysTick() #3
  %.not = icmp eq i32 %2, 0
  br i1 %.not, label %10, label %7

7:                                                ; preds = %3
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %4) #3
  %8 = load ptr, ptr %0, align 8, !tbaa !5
  call void @osMessageGet(ptr dead_on_unwind nonnull writable sret(%struct.osEvent) align 8 %4, ptr noundef %8, i32 noundef %2) #3
  %.sroa.0.0.copyload = load i32, ptr %4, align 8, !tbaa !9
  %.sroa.55.0..sroa_idx = getelementptr inbounds i8, ptr %4, i64 8
  %.sroa.55.0.copyload = load i32, ptr %.sroa.55.0..sroa_idx, align 8
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %4) #3
  %9 = icmp eq i32 %.sroa.0.0.copyload, 16
  br i1 %9, label %.sink.split, label %16

10:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %5) #3
  %11 = load ptr, ptr %0, align 8, !tbaa !5
  call void @osMessageGet(ptr dead_on_unwind nonnull writable sret(%struct.osEvent) align 8 %5, ptr noundef %11, i32 noundef -1) #3
  %.sroa.55.0..sroa_idx6 = getelementptr inbounds i8, ptr %5, i64 8
  %.sroa.55.0.copyload7 = load i32, ptr %.sroa.55.0..sroa_idx6, align 8
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %5) #3
  br label %.sink.split

.sink.split:                                      ; preds = %7, %10
  %.sroa.55.0.copyload7.sink = phi i32 [ %.sroa.55.0.copyload7, %10 ], [ %.sroa.55.0.copyload, %7 ]
  %12 = zext i32 %.sroa.55.0.copyload7.sink to i64
  %13 = inttoptr i64 %12 to ptr
  store ptr %13, ptr %1, align 8, !tbaa !5
  %14 = call i32 @osKernelSysTick() #3
  %15 = sub i32 %14, %6
  br label %16

16:                                               ; preds = %.sink.split, %7
  %.0 = phi i32 [ -1, %7 ], [ %15, %.sink.split ]
  ret i32 %.0
}

declare i32 @osKernelSysTick() local_unnamed_addr #2

declare void @osMessageGet(ptr dead_on_unwind writable sret(%struct.osEvent) align 8, ptr noundef, i32 noundef) local_unnamed_addr #2

attributes #0 = { mustprogress 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}


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