; LLVM IR from introlab/odas :: src/signal (env)

; 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"

%struct.envs_obj = type { i32, i32, ptr }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local ptr @envs_clone(ptr noundef %0) #2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  %5 = call noalias ptr @malloc(i64 noundef 16) #5
  store ptr %5, ptr %3, align 8, !tbaa !5
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.envs_obj, ptr %6, i32 0, i32 0
  %8 = load i32, ptr %7, align 8, !tbaa !9
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.envs_obj, ptr %9, i32 0, i32 0
  store i32 %8, ptr %10, align 8, !tbaa !9
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.envs_obj, ptr %11, i32 0, i32 1
  %13 = load i32, ptr %12, align 4, !tbaa !12
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.envs_obj, ptr %14, i32 0, i32 1
  store i32 %13, ptr %15, align 4, !tbaa !12
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.envs_obj, ptr %16, i32 0, i32 0
  %18 = load i32, ptr %17, align 8, !tbaa !9
  %19 = zext i32 %18 to i64
  %20 = mul i64 8, %19
  %21 = call noalias ptr @malloc(i64 noundef %20) #5
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.envs_obj, ptr %22, i32 0, i32 2
  store ptr %21, ptr %23, align 8, !tbaa !13
  store i32 0, ptr %4, align 4, !tbaa !14
  br label %24

24:                                               ; preds = %62, %1
  %25 = load i32, ptr %4, align 4, !tbaa !14
  %26 = load ptr, ptr %2, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.envs_obj, ptr %26, i32 0, i32 0
  %28 = load i32, ptr %27, align 8, !tbaa !9
  %29 = icmp ult i32 %25, %28
  br i1 %29, label %30, label %65

30:                                               ; preds = %24
  %31 = load ptr, ptr %2, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.envs_obj, ptr %31, i32 0, i32 1
  %33 = load i32, ptr %32, align 4, !tbaa !12
  %34 = zext i32 %33 to i64
  %35 = mul i64 4, %34
  %36 = call noalias ptr @malloc(i64 noundef %35) #5
  %37 = load ptr, ptr %3, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.envs_obj, ptr %37, i32 0, i32 2
  %39 = load ptr, ptr %38, align 8, !tbaa !13
  %40 = load i32, ptr %4, align 4, !tbaa !14
  %41 = zext i32 %40 to i64
  %42 = getelementptr inbounds ptr, ptr %39, i64 %41
  store ptr %36, ptr %42, align 8, !tbaa !5
  %43 = load ptr, ptr %3, align 8, !tbaa !5
  %44 = getelementptr inbounds %struct.envs_obj, ptr %43, i32 0, i32 2
  %45 = load ptr, ptr %44, align 8, !tbaa !13
  %46 = load i32, ptr %4, align 4, !tbaa !14
  %47 = zext i32 %46 to i64
  %48 = getelementptr inbounds ptr, ptr %45, i64 %47
  %49 = load ptr, ptr %48, align 8, !tbaa !5
  %50 = load ptr, ptr %2, align 8, !tbaa !5
  %51 = getelementptr inbounds %struct.envs_obj, ptr %50, i32 0, i32 2
  %52 = load ptr, ptr %51, align 8, !tbaa !13
  %53 = load i32, ptr %4, align 4, !tbaa !14
  %54 = zext i32 %53 to i64
  %55 = getelementptr inbounds ptr, ptr %52, i64 %54
  %56 = load ptr, ptr %55, align 8, !tbaa !5
  %57 = load ptr, ptr %2, align 8, !tbaa !5
  %58 = getelementptr inbounds %struct.envs_obj, ptr %57, i32 0, i32 1
  %59 = load i32, ptr %58, align 4, !tbaa !12
  %60 = zext i32 %59 to i64
  %61 = mul i64 %60, 4
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %49, ptr align 4 %56, i64 %61, i1 false)
  br label %62

62:                                               ; preds = %30
  %63 = load i32, ptr %4, align 4, !tbaa !14
  %64 = add i32 %63, 1
  store i32 %64, ptr %4, align 4, !tbaa !14
  br label %24, !llvm.loop !15

65:                                               ; preds = %24
  %66 = load ptr, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  ret ptr %66
}

; 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) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind allocsize(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 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 #3 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { nounwind }
attributes #5 = { nounwind allocsize(0) }

!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, !11, i64 0}
!10 = !{!"envs_obj", !11, i64 0, !11, i64 4, !6, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 4}
!13 = !{!10, !6, i64 8}
!14 = !{!11, !11, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"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 nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #0

; Function Attrs: nofree nounwind uwtable
define dso_local noalias noundef ptr @envs_clone(ptr nocapture noundef readonly %0) local_unnamed_addr #1 {
  %2 = tail call noalias dereferenceable_or_null(16) ptr @malloc(i64 noundef 16) #3
  %3 = load i32, ptr %0, align 8, !tbaa !5
  store i32 %3, ptr %2, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %0, i64 4
  %5 = load i32, ptr %4, align 4, !tbaa !11
  %6 = getelementptr inbounds i8, ptr %2, i64 4
  store i32 %5, ptr %6, align 4, !tbaa !11
  %7 = zext i32 %3 to i64
  %8 = shl nuw nsw i64 %7, 3
  %9 = tail call noalias ptr @malloc(i64 noundef %8) #3
  %10 = getelementptr inbounds i8, ptr %2, i64 8
  store ptr %9, ptr %10, align 8, !tbaa !12
  %.not = icmp eq i32 %3, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1
  %11 = zext i32 %5 to i64
  %12 = shl nuw nsw i64 %11, 2
  %13 = getelementptr inbounds i8, ptr %0, i64 8
  %14 = load ptr, ptr %13, align 8, !tbaa !12
  br label %15

15:                                               ; preds = %.lr.ph, %15
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %15 ]
  %16 = tail call noalias ptr @malloc(i64 noundef %12) #3
  %17 = getelementptr inbounds ptr, ptr %9, i64 %indvars.iv
  store ptr %16, ptr %17, align 8, !tbaa !13
  %18 = getelementptr inbounds ptr, ptr %14, i64 %indvars.iv
  %19 = load ptr, ptr %18, align 8, !tbaa !13
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 4 %16, ptr align 4 %19, i64 %12, i1 false)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %7
  br i1 %exitcond.not, label %._crit_edge, label %15, !llvm.loop !14

._crit_edge:                                      ; preds = %15, %1
  ret ptr %2
}

; 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) #2

attributes #0 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { nofree 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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { nounwind allocsize(0) }

!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, !7, i64 0}
!6 = !{!"envs_obj", !7, i64 0, !7, i64 4, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 4}
!12 = !{!6, !10, i64 8}
!13 = !{!10, !10, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


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