; LLVM IR from apigee/apib :: third_party/base64 (base64)

; 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"

@pr2six = external hidden constant [256 x i8], align 16

; Function Attrs: nounwind uwtable
define dso_local i32 @Base64decode_len(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  store ptr %6, ptr %4, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %16, %1
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = getelementptr inbounds i8, ptr %8, i32 1
  store ptr %9, ptr %4, align 8, !tbaa !5
  %10 = load i8, ptr %8, align 1, !tbaa !9
  %11 = zext i8 %10 to i64
  %12 = getelementptr inbounds [256 x i8], ptr @pr2six, i64 0, i64 %11
  %13 = load i8, ptr %12, align 1, !tbaa !9
  %14 = zext i8 %13 to i32
  %15 = icmp sle i32 %14, 63
  br i1 %15, label %16, label %17

16:                                               ; preds = %7
  br label %7, !llvm.loop !10

17:                                               ; preds = %7
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = load ptr, ptr %2, align 8, !tbaa !5
  %20 = ptrtoint ptr %18 to i64
  %21 = ptrtoint ptr %19 to i64
  %22 = sub i64 %20, %21
  %23 = sub nsw i64 %22, 1
  %24 = trunc i64 %23 to i32
  store i32 %24, ptr %5, align 4, !tbaa !12
  %25 = load i32, ptr %5, align 4, !tbaa !12
  %26 = add nsw i32 %25, 3
  %27 = sdiv i32 %26, 4
  %28 = mul nsw i32 %27, 3
  store i32 %28, ptr %3, align 4, !tbaa !12
  %29 = load i32, ptr %3, align 4, !tbaa !12
  %30 = add nsw i32 %29, 1
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %30
}

; 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

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 = { 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 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = !{!13, !13, i64 0}
!13 = !{!"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"

@pr2six = external hidden local_unnamed_addr constant [256 x i8], align 16

; Function Attrs: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local range(i32 -1610612732, 1610612735) i32 @Base64decode_len(ptr noundef %0) local_unnamed_addr #0 {
  br label %2

2:                                                ; preds = %2, %1
  %.0 = phi ptr [ %0, %1 ], [ %3, %2 ]
  %3 = getelementptr inbounds i8, ptr %.0, i64 1
  %4 = load i8, ptr %.0, align 1, !tbaa !5
  %5 = zext i8 %4 to i64
  %6 = getelementptr inbounds [256 x i8], ptr @pr2six, i64 0, i64 %5
  %7 = load i8, ptr %6, align 1, !tbaa !5
  %8 = icmp ult i8 %7, 64
  br i1 %8, label %2, label %9, !llvm.loop !8

9:                                                ; preds = %2
  %10 = ptrtoint ptr %3 to i64
  %11 = ptrtoint ptr %0 to i64
  %12 = xor i64 %11, -1
  %13 = add i64 %10, %12
  %14 = trunc i64 %13 to i32
  %15 = add nsw i32 %14, 3
  %16 = sdiv i32 %15, 4
  %17 = mul nsw i32 %16, 3
  %18 = add nsw i32 %17, 1
  ret i32 %18
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) 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: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass