; LLVM IR from devicehive/esp8266-firmware :: esp-utils/common/terminal_posix.ll (ZN8TerminalC2Ev)

; 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.termios = type { i32, i32, i32, i32, i8, [32 x i8], i32, i32 }

@_ZTV8Terminal = external dso_local unnamed_addr constant { [4 x ptr] }, align 8
@_ZL13mOldStdinAttr = external hidden global %struct.termios, align 4

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN8TerminalC2Ev(ptr noundef nonnull align 8 dereferenceable(8) %0) unnamed_addr #0 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca %struct.termios, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %4 = load ptr, ptr %2, align 8
  store ptr getelementptr inbounds inrange(-16, 16) ({ [4 x ptr] }, ptr @_ZTV8Terminal, i32 0, i32 0, i32 2), ptr %4, align 8, !tbaa !9
  call void @llvm.memset.p0.i64(ptr align 4 @_ZL13mOldStdinAttr, i8 0, i64 60, i1 false)
  %5 = call i32 @tcgetattr(i32 noundef 0, ptr noundef @_ZL13mOldStdinAttr) #4
  call void @llvm.lifetime.start.p0(i64 60, ptr %3) #4
  %6 = call i32 @tcgetattr(i32 noundef 0, ptr noundef %3) #4
  %7 = getelementptr inbounds %struct.termios, ptr %3, i32 0, i32 3
  %8 = load i32, ptr %7, align 4, !tbaa !11
  %9 = and i32 %8, -3
  store i32 %9, ptr %7, align 4, !tbaa !11
  %10 = getelementptr inbounds %struct.termios, ptr %3, i32 0, i32 3
  %11 = load i32, ptr %10, align 4, !tbaa !11
  %12 = and i32 %11, -9
  store i32 %12, ptr %10, align 4, !tbaa !11
  %13 = getelementptr inbounds %struct.termios, ptr %3, i32 0, i32 5
  %14 = getelementptr inbounds [32 x i8], ptr %13, i64 0, i64 6
  store i8 1, ptr %14, align 1, !tbaa !14
  %15 = getelementptr inbounds %struct.termios, ptr %3, i32 0, i32 5
  %16 = getelementptr inbounds [32 x i8], ptr %15, i64 0, i64 5
  store i8 0, ptr %16, align 1, !tbaa !14
  %17 = getelementptr inbounds %struct.termios, ptr %3, i32 0, i32 5
  %18 = getelementptr inbounds [32 x i8], ptr %17, i64 0, i64 4
  store i8 3, ptr %18, align 1, !tbaa !14
  %19 = getelementptr inbounds %struct.termios, ptr %3, i32 0, i32 5
  %20 = getelementptr inbounds [32 x i8], ptr %19, i64 0, i64 0
  store i8 0, ptr %20, align 1, !tbaa !14
  %21 = getelementptr inbounds %struct.termios, ptr %3, i32 0, i32 5
  %22 = getelementptr inbounds [32 x i8], ptr %21, i64 0, i64 8
  store i8 0, ptr %22, align 1, !tbaa !14
  %23 = call i32 @tcsetattr(i32 noundef 0, i32 noundef 0, ptr noundef %3) #4
  %24 = call i32 @tcsetattr(i32 noundef 0, i32 noundef 0, ptr noundef %3) #4
  call void @llvm.lifetime.end.p0(i64 60, ptr %3) #4
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: nounwind
declare i32 @tcgetattr(i32 noundef, ptr noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: nounwind
declare i32 @tcsetattr(i32 noundef, i32 noundef, ptr noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

attributes #0 = { mustprogress 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 nounwind willreturn memory(argmem: write) }
attributes #2 = { 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 = { nocallback nofree nosync 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"vtable pointer", !8, i64 0}
!11 = !{!12, !13, i64 12}
!12 = !{!"_ZTS7termios", !13, i64 0, !13, i64 4, !13, i64 8, !13, i64 12, !7, i64 16, !7, i64 17, !13, i64 52, !13, i64 56}
!13 = !{!"int", !7, i64 0}
!14 = !{!7, !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"

%struct.termios = type { i32, i32, i32, i32, i8, [32 x i8], i32, i32 }

@_ZTV8Terminal = external dso_local unnamed_addr constant { [4 x ptr] }, align 8
@_ZL13mOldStdinAttr = external hidden global %struct.termios, align 4

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN8TerminalC2Ev(ptr nocapture noundef nonnull writeonly align 8 dereferenceable(8) %0) unnamed_addr #0 align 2 {
  %2 = alloca %struct.termios, align 4
  store ptr getelementptr inbounds inrange(-16, 16) (i8, ptr @_ZTV8Terminal, i64 16), ptr %0, align 8, !tbaa !5
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 4 dereferenceable(60) @_ZL13mOldStdinAttr, i8 0, i64 60, i1 false)
  %3 = tail call i32 @tcgetattr(i32 noundef 0, ptr noundef nonnull @_ZL13mOldStdinAttr) #4
  call void @llvm.lifetime.start.p0(i64 60, ptr nonnull %2) #4
  %4 = call i32 @tcgetattr(i32 noundef 0, ptr noundef nonnull %2) #4
  %5 = getelementptr inbounds i8, ptr %2, i64 12
  %6 = load i32, ptr %5, align 4, !tbaa !8
  %7 = and i32 %6, -11
  store i32 %7, ptr %5, align 4, !tbaa !8
  %8 = getelementptr inbounds i8, ptr %2, i64 17
  %9 = getelementptr inbounds i8, ptr %2, i64 23
  store i8 1, ptr %9, align 1, !tbaa !12
  %10 = getelementptr inbounds i8, ptr %2, i64 22
  store i8 0, ptr %10, align 2, !tbaa !12
  %11 = getelementptr inbounds i8, ptr %2, i64 21
  store i8 3, ptr %11, align 1, !tbaa !12
  store i8 0, ptr %8, align 1, !tbaa !12
  %12 = getelementptr inbounds i8, ptr %2, i64 25
  store i8 0, ptr %12, align 1, !tbaa !12
  %13 = call i32 @tcsetattr(i32 noundef 0, i32 noundef 0, ptr noundef nonnull %2) #4
  %14 = call i32 @tcsetattr(i32 noundef 0, i32 noundef 0, ptr noundef nonnull %2) #4
  call void @llvm.lifetime.end.p0(i64 60, ptr nonnull %2) #4
  ret void
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: nounwind
declare i32 @tcgetattr(i32 noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: nounwind
declare i32 @tcsetattr(i32 noundef, i32 noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

attributes #0 = { mustprogress 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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #2 = { 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 = { mustprogress nocallback nofree nosync 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !10, i64 12}
!9 = !{!"_ZTS7termios", !10, i64 0, !10, i64 4, !10, i64 8, !10, i64 12, !11, i64 16, !11, i64 17, !10, i64 52, !10, i64 56}
!10 = !{!"int", !11, i64 0}
!11 = !{!"omnipotent char", !7, i64 0}
!12 = !{!11, !11, i64 0}


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