; LLVM IR from Nonoum/ECL :: ECL_common (ECL_JH_Write_E2)

; 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

; Function Attrs: nounwind uwtable
declare dso_local void @ECL_JH_Write(ptr noundef, i8 noundef zeroext, i8 noundef zeroext) #1

; Function Attrs: nounwind uwtable
define dso_local void @ECL_JH_Write_E2(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i8, align 1
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %22, %2
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #2
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = icmp ugt i32 %7, 3
  %9 = zext i1 %8 to i64
  %10 = select i1 %8, i32 4, i32 0
  %11 = trunc i32 %10 to i8
  store i8 %11, ptr %5, align 1, !tbaa !11
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = load i32, ptr %4, align 4, !tbaa !9
  %14 = trunc i32 %13 to i8
  %15 = zext i8 %14 to i32
  %16 = load i8, ptr %5, align 1, !tbaa !11
  %17 = zext i8 %16 to i32
  %18 = or i32 %15, %17
  %19 = trunc i32 %18 to i8
  call void @ECL_JH_Write(ptr noundef %12, i8 noundef zeroext %19, i8 noundef zeroext 3)
  %20 = load i32, ptr %4, align 4, !tbaa !9
  %21 = lshr i32 %20, 2
  store i32 %21, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #2
  br label %22

22:                                               ; preds = %6
  %23 = load i32, ptr %4, align 4, !tbaa !9
  %24 = icmp ne i32 %23, 0
  br i1 %24, label %6, label %25, !llvm.loop !12

25:                                               ; preds = %22
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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, !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 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


; 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
declare dso_local void @ECL_JH_Write(ptr noundef, i8 noundef zeroext, i8 noundef zeroext) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @ECL_JH_Write_E2(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  br label %3

3:                                                ; preds = %3, %2
  %.0 = phi i32 [ %1, %2 ], [ %7, %3 ]
  %.inv = icmp ult i32 %.0, 4
  %4 = select i1 %.inv, i32 0, i32 4
  %5 = or i32 %4, %.0
  %6 = trunc i32 %5 to i8
  tail call void @ECL_JH_Write(ptr noundef %0, i8 noundef zeroext %6, i8 noundef zeroext 3)
  %7 = lshr i32 %.0, 2
  br i1 %.inv, label %8, label %3, !llvm.loop !5

8:                                                ; preds = %3
  ret void
}

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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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