; LLVM IR from kkumatani/distant_speech_recognition :: btk20_src/common/mach_ind_io.ll (Z11read_stringP8_IO_FILEPc)

; 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"

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

declare i64 @fread(ptr noundef, i64 noundef, i64 noundef, ptr noundef) #1

; Function Attrs: mustprogress uwtable
declare dso_local noundef signext i16 @_Z10read_shortP8_IO_FILE(ptr noundef) #2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z11read_stringP8_IO_FILEPc(ptr noundef %0, ptr noundef %1) #2 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i16, align 2
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 2, ptr %7) #3
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = call noundef signext i16 @_Z10read_shortP8_IO_FILE(ptr noundef %9)
  store i16 %10, ptr %7, align 2, !tbaa !9
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = load i16, ptr %7, align 2, !tbaa !9
  %13 = sext i16 %12 to i32
  %14 = add nsw i32 %13, 1
  %15 = sext i32 %14 to i64
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = call i64 @fread(ptr noundef %11, i64 noundef %15, i64 noundef 1, ptr noundef %16)
  %18 = trunc i64 %17 to i32
  store i32 %18, ptr %6, align 4, !tbaa !11
  %19 = load i32, ptr %6, align 4, !tbaa !11
  %20 = icmp eq i32 %19, 0
  br i1 %20, label %21, label %22

21:                                               ; preds = %2
  store i32 0, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %23

22:                                               ; preds = %2
  store i32 1, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %23

23:                                               ; preds = %22, %21
  call void @llvm.lifetime.end.p0(i64 2, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %24 = load i32, ptr %3, align 4
  ret i32 %24
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { mustprogress 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 = { 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 = !{!"short", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !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: nofree nounwind
declare noundef i64 @fread(ptr nocapture noundef, i64 noundef, i64 noundef, ptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef signext i16 @_Z10read_shortP8_IO_FILE(ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local noundef range(i32 0, 2) i32 @_Z11read_stringP8_IO_FILEPc(ptr noundef %0, ptr nocapture noundef %1) local_unnamed_addr #1 {
  %3 = tail call noundef signext i16 @_Z10read_shortP8_IO_FILE(ptr noundef %0)
  %4 = sext i16 %3 to i64
  %5 = add nsw i64 %4, 1
  %6 = tail call i64 @fread(ptr noundef %1, i64 noundef %5, i64 noundef 1, ptr noundef %0)
  %7 = and i64 %6, 4294967295
  %8 = icmp ne i64 %7, 0
  %. = zext i1 %8 to i32
  ret i32 %.
}

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 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" }

!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: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass