; LLVM IR from catid/Zpng :: zstd (zstd_compress)

; 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 nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: nounwind uwtable
define dso_local i64 @ZSTD_noCompressBlock(ptr noundef %0, i64 noundef %1, ptr noundef %2, i64 noundef %3) #1 {
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  store ptr %0, ptr %6, align 8, !tbaa !5
  store i64 %1, ptr %7, align 8, !tbaa !9
  store ptr %2, ptr %8, align 8, !tbaa !5
  store i64 %3, ptr %9, align 8, !tbaa !9
  %10 = load i64, ptr %9, align 8, !tbaa !9
  %11 = add i64 %10, 3
  %12 = load i64, ptr %7, align 8, !tbaa !9
  %13 = icmp ugt i64 %11, %12
  br i1 %13, label %14, label %15

14:                                               ; preds = %4
  store i64 -70, ptr %5, align 8
  br label %27

15:                                               ; preds = %4
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = getelementptr inbounds i8, ptr %16, i64 3
  %18 = load ptr, ptr %8, align 8, !tbaa !5
  %19 = load i64, ptr %9, align 8, !tbaa !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %17, ptr align 1 %18, i64 %19, i1 false)
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  %21 = load i64, ptr %9, align 8, !tbaa !9
  %22 = shl i64 %21, 2
  %23 = trunc i64 %22 to i32
  %24 = add i32 %23, 0
  call void @MEM_writeLE24(ptr noundef %20, i32 noundef %24)
  %25 = load i64, ptr %9, align 8, !tbaa !9
  %26 = add i64 3, %25
  store i64 %26, ptr %5, align 8
  br label %27

27:                                               ; preds = %15, %14
  %28 = load i64, ptr %5, align 8
  ret i64 %28
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @MEM_writeLE24(ptr noundef, i32 noundef) #2

attributes #0 = { nocallback nofree 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 = { inlinehint 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 = !{!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 = !{!"long", !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 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) #0

; Function Attrs: nounwind uwtable
define dso_local noundef i64 @ZSTD_noCompressBlock(ptr noundef %0, i64 noundef %1, ptr nocapture noundef readonly %2, i64 noundef %3) local_unnamed_addr #1 {
  %5 = add i64 %3, 3
  %6 = icmp ugt i64 %5, %1
  br i1 %6, label %10, label %7

7:                                                ; preds = %4
  %8 = getelementptr inbounds i8, ptr %0, i64 3
  tail call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 1 %8, ptr align 1 %2, i64 %3, i1 false)
  %.tr = trunc i64 %3 to i32
  %9 = shl i32 %.tr, 2
  tail call void @MEM_writeLE24(ptr noundef %0, i32 noundef %9)
  br label %10

10:                                               ; preds = %4, %7
  %.0 = phi i64 [ %5, %7 ], [ -70, %4 ]
  ret i64 %.0
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @MEM_writeLE24(ptr noundef, i32 noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nocallback nofree 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 = { inlinehint 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)"}


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