; LLVM IR from 0intro/wmii :: lib/libbio (bputc)

; 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.Biobuf = type { i32, i32, i32, i32, i32, i32, i32, i64, i32, ptr, ptr, ptr, [8196 x i8] }

; Function Attrs: nounwind uwtable
define dso_local i32 @Bputc(ptr noundef %0, i32 noundef %1) #0 {
  %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
  br label %8

8:                                                ; preds = %32, %2
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.Biobuf, ptr %9, i32 0, i32 1
  %11 = load i32, ptr %10, align 4, !tbaa !11
  store i32 %11, ptr %6, align 4, !tbaa !9
  %12 = load i32, ptr %6, align 4, !tbaa !9
  %13 = icmp ne i32 %12, 0
  br i1 %13, label %14, label %27

14:                                               ; preds = %8
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = trunc i32 %15 to i8
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.Biobuf, ptr %17, i32 0, i32 10
  %19 = load ptr, ptr %18, align 8, !tbaa !14
  %20 = load i32, ptr %6, align 4, !tbaa !9
  %21 = add nsw i32 %20, 1
  store i32 %21, ptr %6, align 4, !tbaa !9
  %22 = sext i32 %20 to i64
  %23 = getelementptr inbounds i8, ptr %19, i64 %22
  store i8 %16, ptr %23, align 1, !tbaa !15
  %24 = load i32, ptr %6, align 4, !tbaa !9
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.Biobuf, ptr %25, i32 0, i32 1
  store i32 %24, ptr %26, align 4, !tbaa !11
  store i32 0, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %34

27:                                               ; preds = %8
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = call i32 @Bflush(ptr noundef %28)
  %30 = icmp eq i32 %29, -1
  br i1 %30, label %31, label %32

31:                                               ; preds = %27
  br label %33

32:                                               ; preds = %27
  br label %8

33:                                               ; preds = %31
  store i32 -1, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %34

34:                                               ; preds = %33, %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %35 = load i32, ptr %3, align 4
  ret i32 %35
}

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

declare i32 @Bflush(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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 4}
!12 = !{!"Biobuf", !10, i64 0, !10, i64 4, !10, i64 8, !10, i64 12, !10, i64 16, !10, i64 20, !10, i64 24, !13, i64 32, !10, i64 40, !6, i64 48, !6, i64 56, !6, i64 64, !7, i64 72}
!13 = !{!"long", !7, i64 0}
!14 = !{!12, !6, i64 56}
!15 = !{!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"

; Function Attrs: nounwind uwtable
define dso_local range(i32 -1, 1) i32 @Bputc(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 4
  br label %4

4:                                                ; preds = %13, %2
  %5 = load i32, ptr %3, align 4, !tbaa !5
  %.not = icmp eq i32 %5, 0
  br i1 %.not, label %13, label %6

6:                                                ; preds = %4
  %7 = trunc i32 %1 to i8
  %8 = getelementptr inbounds i8, ptr %0, i64 56
  %9 = load ptr, ptr %8, align 8, !tbaa !12
  %10 = add nsw i32 %5, 1
  %11 = sext i32 %5 to i64
  %12 = getelementptr inbounds i8, ptr %9, i64 %11
  store i8 %7, ptr %12, align 1, !tbaa !13
  store i32 %10, ptr %3, align 4, !tbaa !5
  br label %.loopexit

13:                                               ; preds = %4
  %14 = tail call i32 @Bflush(ptr noundef nonnull %0) #2
  %15 = icmp eq i32 %14, -1
  br i1 %15, label %.loopexit, label %4

.loopexit:                                        ; preds = %13, %6
  %.0 = phi i32 [ 0, %6 ], [ -1, %13 ]
  ret i32 %.0
}

declare i32 @Bflush(ptr 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)"}
!5 = !{!6, !7, i64 4}
!6 = !{!"Biobuf", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12, !7, i64 16, !7, i64 20, !7, i64 24, !10, i64 32, !7, i64 40, !11, i64 48, !11, i64 56, !11, i64 64, !8, i64 72}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!6, !11, i64 56}
!13 = !{!8, !8, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass