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

; 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.mem = type { i16, i16, i8 }

@ram_heap = external dso_local global [16403 x i8], align 16
@ram = external hidden global ptr, align 8
@ram_end = external hidden global ptr, align 8
@lfree = external hidden global ptr, align 8
@mem_mutex = external hidden global ptr, align 8
@.str = external hidden unnamed_addr constant [40 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [27 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [178 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local void @mem_init() #0 {
  %1 = alloca ptr, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %1) #3
  br label %2

2:                                                ; preds = %0
  br label %3

3:                                                ; preds = %2
  br label %4

4:                                                ; preds = %3
  %5 = and i64 sub (i64 add (i64 ptrtoint (ptr @ram_heap to i64), i64 4), i64 1), -4
  %6 = inttoptr i64 %5 to ptr
  store ptr %6, ptr @ram, align 8, !tbaa !5
  %7 = load ptr, ptr @ram, align 8, !tbaa !5
  store ptr %7, ptr %1, align 8, !tbaa !5
  %8 = load ptr, ptr %1, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.mem, ptr %8, i32 0, i32 0
  store i16 16384, ptr %9, align 2, !tbaa !9
  %10 = load ptr, ptr %1, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.mem, ptr %10, i32 0, i32 1
  store i16 0, ptr %11, align 2, !tbaa !12
  %12 = load ptr, ptr %1, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.mem, ptr %12, i32 0, i32 2
  store i8 0, ptr %13, align 2, !tbaa !13
  %14 = call ptr @ptr_to_mem(i16 noundef zeroext 16384)
  store ptr %14, ptr @ram_end, align 8, !tbaa !5
  %15 = load ptr, ptr @ram_end, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.mem, ptr %15, i32 0, i32 2
  store i8 1, ptr %16, align 2, !tbaa !13
  %17 = load ptr, ptr @ram_end, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.mem, ptr %17, i32 0, i32 0
  store i16 16384, ptr %18, align 2, !tbaa !9
  %19 = load ptr, ptr @ram_end, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.mem, ptr %19, i32 0, i32 1
  store i16 16384, ptr %20, align 2, !tbaa !12
  %21 = load ptr, ptr @ram, align 8, !tbaa !5
  store ptr %21, ptr @lfree, align 8, !tbaa !5
  %22 = call signext i8 @sys_mutex_new(ptr noundef @mem_mutex)
  %23 = sext i8 %22 to i32
  %24 = icmp ne i32 %23, 0
  br i1 %24, label %25, label %33

25:                                               ; preds = %4
  br label %26

26:                                               ; preds = %25
  br label %27

27:                                               ; preds = %26
  %28 = call i32 (ptr, ...) @printf(ptr noundef @.str, ptr noundef @.str.1, i32 noundef 543, ptr noundef @.str.2)
  br label %29

29:                                               ; preds = %27
  br label %30

30:                                               ; preds = %29
  br label %31

31:                                               ; preds = %30
  br label %32

32:                                               ; preds = %31
  br label %33

33:                                               ; preds = %32, %4
  call void @llvm.lifetime.end.p0(i64 8, ptr %1) #3
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind uwtable
declare hidden ptr @ptr_to_mem(i16 noundef zeroext) #0

declare signext i8 @sys_mutex_new(ptr noundef) #2

declare i32 @printf(ptr noundef, ...) #2

; 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 = { "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, !11, i64 0}
!10 = !{!"mem", !11, i64 0, !11, i64 2, !7, i64 4}
!11 = !{!"short", !7, i64 0}
!12 = !{!10, !11, i64 2}
!13 = !{!10, !7, i64 4}


; 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"

@ram_heap = external dso_local global [16403 x i8], align 16
@ram = external hidden local_unnamed_addr global ptr, align 8
@ram_end = external hidden local_unnamed_addr global ptr, align 8
@lfree = external hidden local_unnamed_addr global ptr, align 8
@mem_mutex = external hidden global ptr, align 8
@.str = external hidden unnamed_addr constant [40 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [27 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [178 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local void @mem_init() local_unnamed_addr #0 {
  %1 = and i64 sub (i64 add (i64 ptrtoint (ptr @ram_heap to i64), i64 4), i64 1), -16
  %2 = inttoptr i64 %1 to ptr
  store ptr %2, ptr @ram, align 8, !tbaa !5
  store i16 16384, ptr %2, align 16, !tbaa !9
  %3 = getelementptr inbounds i8, ptr %2, i64 2
  store i16 0, ptr %3, align 2, !tbaa !12
  %4 = getelementptr inbounds i8, ptr %2, i64 4
  store i8 0, ptr %4, align 4, !tbaa !13
  %5 = tail call ptr @ptr_to_mem(i16 noundef zeroext 16384)
  store ptr %5, ptr @ram_end, align 8, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %5, i64 4
  store i8 1, ptr %6, align 2, !tbaa !13
  store i16 16384, ptr %5, align 2, !tbaa !9
  %7 = getelementptr inbounds i8, ptr %5, i64 2
  store i16 16384, ptr %7, align 2, !tbaa !12
  %8 = load ptr, ptr @ram, align 8, !tbaa !5
  store ptr %8, ptr @lfree, align 8, !tbaa !5
  %9 = tail call signext i8 @sys_mutex_new(ptr noundef nonnull @mem_mutex) #3
  %.not = icmp eq i8 %9, 0
  br i1 %.not, label %12, label %10

10:                                               ; preds = %0
  %11 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull @.str.1, i32 noundef 543, ptr noundef nonnull @.str.2)
  br label %12

12:                                               ; preds = %10, %0
  ret void
}

; Function Attrs: nounwind uwtable
declare hidden ptr @ptr_to_mem(i16 noundef zeroext) local_unnamed_addr #0

declare signext i8 @sys_mutex_new(ptr noundef) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

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 = { nofree nounwind "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, !11, i64 0}
!10 = !{!"mem", !11, i64 0, !11, i64 2, !7, i64 4}
!11 = !{!"short", !7, i64 0}
!12 = !{!10, !11, i64 2}
!13 = !{!10, !7, i64 4}


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