; LLVM IR from introlab/odas :: src/utils (pcm)

; 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.pcm_signedXXbits2json.hex = external hidden unnamed_addr constant [16 x i8], align 16

; 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
define dso_local void @pcm_signedXXbits2json(ptr noundef %0, i32 noundef %1, ptr noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i8, align 1
  %9 = alloca i8, align 1
  %10 = alloca [16 x i8], align 16
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 1, ptr %8) #3
  call void @llvm.lifetime.start.p0(i64 1, ptr %9) #3
  call void @llvm.lifetime.start.p0(i64 16, ptr %10) #3
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %10, ptr align 16 @__const.pcm_signedXXbits2json.hex, i64 16, i1 false)
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %53, %3
  %12 = load i32, ptr %7, align 4, !tbaa !9
  %13 = load i32, ptr %5, align 4, !tbaa !9
  %14 = icmp ult i32 %12, %13
  br i1 %14, label %15, label %56

15:                                               ; preds = %11
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = load i32, ptr %7, align 4, !tbaa !9
  %18 = zext i32 %17 to i64
  %19 = getelementptr inbounds i8, ptr %16, i64 %18
  %20 = load i8, ptr %19, align 1, !tbaa !11
  %21 = sext i8 %20 to i32
  %22 = ashr i32 %21, 4
  %23 = and i32 %22, 15
  %24 = trunc i32 %23 to i8
  store i8 %24, ptr %8, align 1, !tbaa !11
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = load i32, ptr %7, align 4, !tbaa !9
  %27 = zext i32 %26 to i64
  %28 = getelementptr inbounds i8, ptr %25, i64 %27
  %29 = load i8, ptr %28, align 1, !tbaa !11
  %30 = sext i8 %29 to i32
  %31 = and i32 %30, 15
  %32 = trunc i32 %31 to i8
  store i8 %32, ptr %9, align 1, !tbaa !11
  %33 = load i8, ptr %8, align 1, !tbaa !11
  %34 = sext i8 %33 to i64
  %35 = getelementptr inbounds [16 x i8], ptr %10, i64 0, i64 %34
  %36 = load i8, ptr %35, align 1, !tbaa !11
  %37 = load ptr, ptr %6, align 8, !tbaa !5
  %38 = load i32, ptr %7, align 4, !tbaa !9
  %39 = mul i32 %38, 2
  %40 = add i32 %39, 0
  %41 = zext i32 %40 to i64
  %42 = getelementptr inbounds i8, ptr %37, i64 %41
  store i8 %36, ptr %42, align 1, !tbaa !11
  %43 = load i8, ptr %9, align 1, !tbaa !11
  %44 = sext i8 %43 to i64
  %45 = getelementptr inbounds [16 x i8], ptr %10, i64 0, i64 %44
  %46 = load i8, ptr %45, align 1, !tbaa !11
  %47 = load ptr, ptr %6, align 8, !tbaa !5
  %48 = load i32, ptr %7, align 4, !tbaa !9
  %49 = mul i32 %48, 2
  %50 = add i32 %49, 1
  %51 = zext i32 %50 to i64
  %52 = getelementptr inbounds i8, ptr %47, i64 %51
  store i8 %46, ptr %52, align 1, !tbaa !11
  br label %53

53:                                               ; preds = %15
  %54 = load i32, ptr %7, align 4, !tbaa !9
  %55 = add i32 %54, 1
  store i32 %55, ptr %7, align 4, !tbaa !9
  br label %11, !llvm.loop !12

56:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 16, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  ret void
}

; 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

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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 = !{!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"

@__const.pcm_signedXXbits2json.hex = external hidden unnamed_addr constant [16 x i8], align 16

; Function Attrs: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @pcm_signedXXbits2json(ptr nocapture noundef readonly %0, i32 noundef %1, ptr nocapture noundef writeonly %2) local_unnamed_addr #0 {
  %.not = icmp eq i32 %1, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %wide.trip.count = zext i32 %1 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %4 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  %5 = load i8, ptr %4, align 1, !tbaa !5
  %6 = lshr i8 %5, 4
  %7 = and i8 %5, 15
  %8 = zext nneg i8 %6 to i64
  %9 = getelementptr inbounds [16 x i8], ptr @__const.pcm_signedXXbits2json.hex, i64 0, i64 %8
  %10 = load i8, ptr %9, align 1, !tbaa !5
  %11 = trunc nuw i64 %indvars.iv to i32
  %12 = shl i32 %11, 1
  %13 = zext i32 %12 to i64
  %14 = getelementptr inbounds i8, ptr %2, i64 %13
  store i8 %10, ptr %14, align 1, !tbaa !5
  %15 = zext nneg i8 %7 to i64
  %16 = getelementptr inbounds [16 x i8], ptr @__const.pcm_signedXXbits2json.hex, i64 0, i64 %15
  %17 = load i8, ptr %16, align 1, !tbaa !5
  %18 = or disjoint i32 %12, 1
  %19 = zext i32 %18 to i64
  %20 = getelementptr inbounds i8, ptr %2, i64 %19
  store i8 %17, ptr %20, align 1, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !8

._crit_edge:                                      ; preds = %.lr.ph, %3
  ret void
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) 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 = !{!6, !6, i64 0}
!6 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass