; LLVM IR from KoishiDB/Koishi-DB :: src/util/encode.ll (ZN8koishidb13DecodeFixed64EPKc)

; 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: mustprogress nounwind uwtable
define dso_local noundef i64 @_ZN8koishidb13DecodeFixed64EPKc(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  %4 = load ptr, ptr %2, align 8, !tbaa !5
  store ptr %4, ptr %3, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %5, i64 0
  %7 = load i8, ptr %6, align 1, !tbaa !9
  %8 = zext i8 %7 to i64
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds i8, ptr %9, i64 1
  %11 = load i8, ptr %10, align 1, !tbaa !9
  %12 = zext i8 %11 to i64
  %13 = shl i64 %12, 8
  %14 = or i64 %8, %13
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds i8, ptr %15, i64 2
  %17 = load i8, ptr %16, align 1, !tbaa !9
  %18 = zext i8 %17 to i64
  %19 = shl i64 %18, 16
  %20 = or i64 %14, %19
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds i8, ptr %21, i64 3
  %23 = load i8, ptr %22, align 1, !tbaa !9
  %24 = zext i8 %23 to i64
  %25 = shl i64 %24, 24
  %26 = or i64 %20, %25
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = getelementptr inbounds i8, ptr %27, i64 4
  %29 = load i8, ptr %28, align 1, !tbaa !9
  %30 = zext i8 %29 to i64
  %31 = shl i64 %30, 32
  %32 = or i64 %26, %31
  %33 = load ptr, ptr %3, align 8, !tbaa !5
  %34 = getelementptr inbounds i8, ptr %33, i64 5
  %35 = load i8, ptr %34, align 1, !tbaa !9
  %36 = zext i8 %35 to i64
  %37 = shl i64 %36, 40
  %38 = or i64 %32, %37
  %39 = load ptr, ptr %3, align 8, !tbaa !5
  %40 = getelementptr inbounds i8, ptr %39, i64 6
  %41 = load i8, ptr %40, align 1, !tbaa !9
  %42 = zext i8 %41 to i64
  %43 = shl i64 %42, 48
  %44 = or i64 %38, %43
  %45 = load ptr, ptr %3, align 8, !tbaa !5
  %46 = getelementptr inbounds i8, ptr %45, i64 7
  %47 = load i8, ptr %46, align 1, !tbaa !9
  %48 = zext i8 %47 to i64
  %49 = shl i64 %48, 56
  %50 = or i64 %44, %49
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret i64 %50
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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++ TBAA"}
!9 = !{!7, !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: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef i64 @_ZN8koishidb13DecodeFixed64EPKc(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = load i64, ptr %0, align 1
  ret i64 %2
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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: AggressiveInstCombinePass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass