; LLVM IR from aagdev/mlimgsynth :: src/ccommon (image_io)

; 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"

@imgio_codecs = external dso_local global [32 x ptr], align 16

; Function Attrs: nounwind uwtable
define dso_local i32 @img_codec_register(ptr noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %21, %1
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [32 x ptr], ptr @imgio_codecs, i64 0, i64 %8
  %10 = load ptr, ptr %9, align 8, !tbaa !5
  %11 = icmp ne ptr %10, null
  br i1 %11, label %12, label %24

12:                                               ; preds = %6
  %13 = load i32, ptr %4, align 4, !tbaa !9
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [32 x ptr], ptr @imgio_codecs, i64 0, i64 %14
  %16 = load ptr, ptr %15, align 8, !tbaa !5
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = icmp eq ptr %16, %17
  br i1 %18, label %19, label %20

19:                                               ; preds = %12
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %33

20:                                               ; preds = %12
  br label %21

21:                                               ; preds = %20
  %22 = load i32, ptr %4, align 4, !tbaa !9
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %4, align 4, !tbaa !9
  br label %6, !llvm.loop !11

24:                                               ; preds = %6
  %25 = load i32, ptr %4, align 4, !tbaa !9
  %26 = icmp sge i32 %25, 31
  br i1 %26, label %27, label %28

27:                                               ; preds = %24
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %33

28:                                               ; preds = %24
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = load i32, ptr %4, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [32 x ptr], ptr @imgio_codecs, i64 0, i64 %31
  store ptr %29, ptr %32, align 8, !tbaa !5
  store i32 1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %33

33:                                               ; preds = %28, %27, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %34 = load i32, ptr %2, align 4
  ret i32 %34
}

; 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 = !{!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"

@imgio_codecs = external dso_local local_unnamed_addr global [32 x ptr], align 16

; Function Attrs: nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local range(i32 -1, 2) i32 @img_codec_register(ptr noundef %0) local_unnamed_addr #0 {
  %2 = load ptr, ptr @imgio_codecs, align 16, !tbaa !5
  %.not12 = icmp eq ptr %2, null
  br i1 %.not12, label %._crit_edge.thread, label %.lr.ph

.lr.ph:                                           ; preds = %1, %5
  %indvars.iv = phi i64 [ %indvars.iv.next, %5 ], [ 0, %1 ]
  %3 = phi ptr [ %7, %5 ], [ %2, %1 ]
  %4 = icmp eq ptr %3, %0
  br i1 %4, label %.loopexit, label %5

5:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %6 = getelementptr inbounds [32 x ptr], ptr @imgio_codecs, i64 0, i64 %indvars.iv.next
  %7 = load ptr, ptr %6, align 8, !tbaa !5
  %.not = icmp eq ptr %7, null
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %5
  %8 = icmp ugt i64 %indvars.iv, 29
  br i1 %8, label %.loopexit, label %._crit_edge.thread

._crit_edge.thread:                               ; preds = %1, %._crit_edge
  %.lcssa1119 = phi i64 [ %indvars.iv.next, %._crit_edge ], [ 0, %1 ]
  %9 = getelementptr inbounds [32 x ptr], ptr @imgio_codecs, i64 0, i64 %.lcssa1119
  store ptr %0, ptr %9, align 8, !tbaa !5
  br label %.loopexit

.loopexit:                                        ; preds = %.lr.ph, %._crit_edge, %._crit_edge.thread
  %.07 = phi i32 [ 1, %._crit_edge.thread ], [ -1, %._crit_edge ], [ 0, %.lr.ph ]
  ret i32 %.07
}

attributes #0 = { nofree norecurse nosync nounwind memory(readwrite, argmem: none, 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass