; LLVM IR from vteromero/VTEnc :: tests/unit (bitstream_test)

; 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.bsreader = type { i64, i32, ptr, ptr, ptr }

@__const.test_bsreader_read_1.buf = external hidden unnamed_addr constant [2 x i8], align 1
@.str.21 = external hidden unnamed_addr constant [47 x i8], align 1
@.str.22 = external hidden unnamed_addr constant [47 x i8], align 1

declare i32 @printf(ptr noundef, ...) #0

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

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

; Function Attrs: nounwind uwtable
define dso_local i32 @test_bsreader_read_1() #2 {
  %1 = alloca i32, align 4
  %2 = alloca %struct.bsreader, align 8
  %3 = alloca [2 x i8], align 1
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 40, ptr %2) #5
  call void @llvm.lifetime.start.p0(i64 2, ptr %3) #5
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %3, ptr align 1 @__const.test_bsreader_read_1.buf, i64 2, i1 false)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  store i64 2, ptr %4, align 8, !tbaa !5
  %6 = getelementptr inbounds [2 x i8], ptr %3, i64 0, i64 0
  call void @bsreader_init(ptr noundef %2, ptr noundef %6, i64 noundef 2)
  br label %7

7:                                                ; preds = %0
  %8 = call i64 @bsreader_read(ptr noundef %2, i32 noundef 8)
  %9 = icmp eq i64 %8, 255
  br i1 %9, label %12, label %10

10:                                               ; preds = %7
  %11 = call i32 (ptr, ...) @printf(ptr noundef @.str.21)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %5, align 4
  br label %23

12:                                               ; preds = %7
  br label %13

13:                                               ; preds = %12
  br label %14

14:                                               ; preds = %13
  br label %15

15:                                               ; preds = %14
  %16 = call i64 @bsreader_read(ptr noundef %2, i32 noundef 8)
  %17 = icmp eq i64 %16, 102
  br i1 %17, label %20, label %18

18:                                               ; preds = %15
  %19 = call i32 (ptr, ...) @printf(ptr noundef @.str.22)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %5, align 4
  br label %23

20:                                               ; preds = %15
  br label %21

21:                                               ; preds = %20
  br label %22

22:                                               ; preds = %21
  store i32 1, ptr %1, align 4
  store i32 1, ptr %5, align 4
  br label %23

23:                                               ; preds = %22, %18, %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 2, ptr %3) #5
  call void @llvm.lifetime.end.p0(i64 40, ptr %2) #5
  %24 = load i32, ptr %1, align 4
  ret i32 %24
}

; 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

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @bsreader_init(ptr noundef, ptr noundef, i64 noundef) #4

; Function Attrs: inlinehint nounwind uwtable
declare hidden i64 @bsreader_read(ptr noundef, i32 noundef) #4

attributes #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 = { 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 #3 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { inlinehint 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 #5 = { 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; 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.bsreader = type { i64, i32, ptr, ptr, ptr }

@__const.test_bsreader_read_1.buf = external hidden unnamed_addr constant [2 x i8], align 1
@.str.21 = external hidden unnamed_addr constant [47 x i8], align 1
@.str.22 = external hidden unnamed_addr constant [47 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #0

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

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

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 2) i32 @test_bsreader_read_1() local_unnamed_addr #2 {
  %1 = alloca %struct.bsreader, align 8
  %2 = alloca [2 x i8], align 2
  call void @llvm.lifetime.start.p0(i64 40, ptr nonnull %1) #4
  call void @llvm.lifetime.start.p0(i64 2, ptr nonnull %2) #4
  %3 = load i16, ptr @__const.test_bsreader_read_1.buf, align 1
  store i16 %3, ptr %2, align 2
  call void @bsreader_init(ptr noundef nonnull %1, ptr noundef nonnull %2, i64 noundef 2)
  %4 = call i64 @bsreader_read(ptr noundef nonnull %1, i32 noundef 8)
  %5 = icmp eq i64 %4, 255
  br i1 %5, label %6, label %.sink.split

6:                                                ; preds = %0
  %7 = call i64 @bsreader_read(ptr noundef nonnull %1, i32 noundef 8)
  %8 = icmp eq i64 %7, 102
  br i1 %8, label %10, label %.sink.split

.sink.split:                                      ; preds = %6, %0
  %.str.22.sink = phi ptr [ @.str.21, %0 ], [ @.str.22, %6 ]
  %9 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) %.str.22.sink)
  br label %10

10:                                               ; preds = %.sink.split, %6
  %.0 = phi i32 [ 1, %6 ], [ 0, %.sink.split ]
  call void @llvm.lifetime.end.p0(i64 2, ptr nonnull %2) #4
  call void @llvm.lifetime.end.p0(i64 40, ptr nonnull %1) #4
  ret i32 %.0
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @bsreader_init(ptr noundef, ptr noundef, i64 noundef) local_unnamed_addr #3

; Function Attrs: inlinehint nounwind uwtable
declare hidden i64 @bsreader_read(ptr noundef, i32 noundef) local_unnamed_addr #3

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { inlinehint 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 #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)"}


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