; LLVM IR from vteromero/VTEnc :: tests/unit (mem_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"

@__const.test_little_endian_read_and_write_u16.in_data = external hidden unnamed_addr constant [2 x i8], align 1
@.str = external hidden unnamed_addr constant [47 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @test_little_endian_read_and_write_u16() #0 {
  %1 = alloca i32, align 4
  %2 = alloca [2 x i8], align 1
  %3 = alloca [2 x i8], align 1
  %4 = alloca i16, align 2
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 2, ptr %2) #6
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %2, ptr align 1 @__const.test_little_endian_read_and_write_u16.in_data, i64 2, i1 false)
  call void @llvm.lifetime.start.p0(i64 2, ptr %3) #6
  call void @llvm.lifetime.start.p0(i64 2, ptr %4) #6
  %6 = getelementptr inbounds [2 x i8], ptr %2, i64 0, i64 0
  %7 = call zeroext i16 @mem_read_le_u16(ptr noundef %6)
  store i16 %7, ptr %4, align 2, !tbaa !5
  %8 = getelementptr inbounds [2 x i8], ptr %3, i64 0, i64 0
  %9 = load i16, ptr %4, align 2, !tbaa !5
  call void @mem_write_le_u16(ptr noundef %8, i16 noundef zeroext %9)
  br label %10

10:                                               ; preds = %0
  %11 = getelementptr inbounds [2 x i8], ptr %2, i64 0, i64 0
  %12 = getelementptr inbounds [2 x i8], ptr %3, i64 0, i64 0
  %13 = call i32 @memcmp(ptr noundef %11, ptr noundef %12, i64 noundef 2) #7
  %14 = icmp eq i32 %13, 0
  br i1 %14, label %17, label %15

15:                                               ; preds = %10
  %16 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %5, align 4
  br label %20

17:                                               ; preds = %10
  br label %18

18:                                               ; preds = %17
  br label %19

19:                                               ; preds = %18
  store i32 1, ptr %1, align 4
  store i32 1, ptr %5, align 4
  br label %20

20:                                               ; preds = %19, %15
  call void @llvm.lifetime.end.p0(i64 2, ptr %4) #6
  call void @llvm.lifetime.end.p0(i64 2, ptr %3) #6
  call void @llvm.lifetime.end.p0(i64 2, ptr %2) #6
  %21 = load i32, ptr %1, align 4
  ret i32 %21
}

; 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 nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

; Function Attrs: inlinehint nounwind uwtable
declare hidden zeroext i16 @mem_read_le_u16(ptr noundef) #3

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @mem_write_le_u16(ptr noundef, i16 noundef zeroext) #3

; Function Attrs: nounwind willreturn memory(read)
declare i32 @memcmp(ptr noundef, ptr noundef, i64 noundef) #4

declare i32 @printf(ptr noundef, ...) #5

; 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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 willreturn memory(read) "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 = { "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 #6 = { nounwind }
attributes #7 = { nounwind willreturn memory(read) }

!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 = !{!"short", !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"

@__const.test_little_endian_read_and_write_u16.in_data = external hidden unnamed_addr constant [2 x i8], align 1
@.str = external hidden unnamed_addr constant [47 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 2) i32 @test_little_endian_read_and_write_u16() local_unnamed_addr #0 {
  %1 = alloca [2 x i8], align 2
  %2 = alloca [2 x i8], align 1
  call void @llvm.lifetime.start.p0(i64 2, ptr nonnull %1) #5
  %3 = load i16, ptr @__const.test_little_endian_read_and_write_u16.in_data, align 1
  store i16 %3, ptr %1, align 2
  call void @llvm.lifetime.start.p0(i64 2, ptr nonnull %2) #5
  %4 = call zeroext i16 @mem_read_le_u16(ptr noundef nonnull %1)
  call void @mem_write_le_u16(ptr noundef nonnull %2, i16 noundef zeroext %4)
  %bcmp = call i32 @bcmp(ptr noundef nonnull dereferenceable(2) %1, ptr noundef nonnull dereferenceable(2) %2, i64 2)
  %5 = icmp eq i32 %bcmp, 0
  br i1 %5, label %8, label %6

6:                                                ; preds = %0
  %7 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  br label %8

8:                                                ; preds = %0, %6
  %.0 = phi i32 [ 0, %6 ], [ 1, %0 ]
  call void @llvm.lifetime.end.p0(i64 2, ptr nonnull %2) #5
  call void @llvm.lifetime.end.p0(i64 2, ptr nonnull %1) #5
  ret i32 %.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: inlinehint nounwind uwtable
declare hidden zeroext i16 @mem_read_le_u16(ptr noundef) local_unnamed_addr #2

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @mem_write_le_u16(ptr noundef, i16 noundef zeroext) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

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

; Function Attrs: nofree nounwind willreturn memory(argmem: read)
declare i32 @bcmp(ptr nocapture, ptr nocapture, i64) local_unnamed_addr #4

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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { 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 #4 = { nofree nounwind willreturn memory(argmem: read) }
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)"}


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