; LLVM IR from dynexcoin/Dynex :: src/Common/StreamTools.ll (ZN6Common11writeVarintERNS_13IOutputStreamEj)

; 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: mustprogress uwtable
declare dso_local void @_ZN6Common5writeERNS_13IOutputStreamEh(ptr noundef nonnull align 8 dereferenceable(8), i8 noundef zeroext) #0

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN6Common11writeVarintERNS_13IOutputStreamEj(ptr noundef nonnull align 8 dereferenceable(8) %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  br label %5

5:                                                ; preds = %8, %2
  %6 = load i32, ptr %4, align 4, !tbaa !9
  %7 = icmp uge i32 %6, 128
  br i1 %7, label %8, label %15

8:                                                ; preds = %5
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = load i32, ptr %4, align 4, !tbaa !9
  %11 = or i32 %10, 128
  %12 = trunc i32 %11 to i8
  call void @_ZN6Common5writeERNS_13IOutputStreamEh(ptr noundef nonnull align 8 dereferenceable(8) %9, i8 noundef zeroext %12)
  %13 = load i32, ptr %4, align 4, !tbaa !9
  %14 = lshr i32 %13, 7
  store i32 %14, ptr %4, align 4, !tbaa !9
  br label %5, !llvm.loop !11

15:                                               ; preds = %5
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = load i32, ptr %4, align 4, !tbaa !9
  %18 = trunc i32 %17 to i8
  call void @_ZN6Common5writeERNS_13IOutputStreamEh(ptr noundef nonnull align 8 dereferenceable(8) %16, i8 noundef zeroext %18)
  ret void
}

attributes #0 = { 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)"}
!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 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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: mustprogress uwtable
declare dso_local void @_ZN6Common5writeERNS_13IOutputStreamEh(ptr noundef nonnull align 8 dereferenceable(8), i8 noundef zeroext) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN6Common11writeVarintERNS_13IOutputStreamEj(ptr noundef nonnull align 8 dereferenceable(8) %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp ugt i32 %1, 127
  br i1 %3, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.05 = phi i32 [ %6, %.lr.ph ], [ %1, %2 ]
  %4 = trunc i32 %.05 to i8
  %5 = or i8 %4, -128
  tail call void @_ZN6Common5writeERNS_13IOutputStreamEh(ptr noundef nonnull align 8 dereferenceable(8) %0, i8 noundef zeroext %5)
  %6 = lshr i32 %.05, 7
  %7 = icmp ugt i32 %.05, 16383
  br i1 %7, label %.lr.ph, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.0.lcssa = phi i32 [ %1, %2 ], [ %6, %.lr.ph ]
  %8 = trunc nuw nsw i32 %.0.lcssa to i8
  tail call void @_ZN6Common5writeERNS_13IOutputStreamEh(ptr noundef nonnull align 8 dereferenceable(8) %0, i8 noundef zeroext %8)
  ret void
}

attributes #0 = { 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)"}
!5 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass