; LLVM IR from CLASS-SZ/class_sz :: class-sz/tools (r8lib)

; 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: nounwind uwtable
define dso_local i32 @r8poly_order(i32 noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = add nsw i32 %8, 1
  store i32 %9, ptr %6, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %23, %2
  %11 = load i32, ptr %6, align 4, !tbaa !5
  %12 = icmp slt i32 1, %11
  br i1 %12, label %13, label %26

13:                                               ; preds = %10
  %14 = load ptr, ptr %5, align 8, !tbaa !9
  %15 = load i32, ptr %6, align 4, !tbaa !5
  %16 = sub nsw i32 %15, 1
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds double, ptr %14, i64 %17
  %19 = load double, ptr %18, align 8, !tbaa !11
  %20 = fcmp une double %19, 0.000000e+00
  br i1 %20, label %21, label %23

21:                                               ; preds = %13
  %22 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %22, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %28

23:                                               ; preds = %13
  %24 = load i32, ptr %6, align 4, !tbaa !5
  %25 = sub nsw i32 %24, 1
  store i32 %25, ptr %6, align 4, !tbaa !5
  br label %10, !llvm.loop !13

26:                                               ; preds = %10
  %27 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %27, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %28

28:                                               ; preds = %26, %21
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %29 = load i32, ptr %3, align 4
  ret i32 %29
}

attributes #0 = { nocallback nofree nosync 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 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"double", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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: nofree norecurse nosync nounwind memory(argmem: read) uwtable
define dso_local range(i32 -2147483647, -2147483648) i32 @r8poly_order(i32 noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = add i32 %0, 1
  %4 = zext i32 %3 to i64
  %smin = tail call i32 @llvm.smin.i32(i32 %3, i32 1)
  br label %5

5:                                                ; preds = %8, %2
  %indvars.iv = phi i64 [ %9, %8 ], [ %4, %2 ]
  %6 = trunc nuw i64 %indvars.iv to i32
  %7 = icmp sgt i32 %6, 1
  br i1 %7, label %8, label %13

8:                                                ; preds = %5
  %9 = add nsw i64 %indvars.iv, -1
  %10 = getelementptr inbounds double, ptr %1, i64 %9
  %11 = load double, ptr %10, align 8, !tbaa !5
  %12 = fcmp une double %11, 0.000000e+00
  br i1 %12, label %13, label %5, !llvm.loop !9

13:                                               ; preds = %5, %8
  %.0.lcssa = phi i32 [ %smin, %5 ], [ %6, %8 ]
  ret i32 %.0.lcssa
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smin.i32(i32, i32) #1

attributes #0 = { nofree norecurse nosync nounwind 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" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = !{!"double", !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,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass