; 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
declare double @pow(double noundef, double noundef) #1

; Function Attrs: nounwind uwtable
define dso_local double @r8_power(double noundef %0, i32 noundef %1) #2 {
  %3 = alloca double, align 8
  %4 = alloca i32, align 4
  %5 = alloca double, align 8
  store double %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %6 = load i32, ptr %4, align 4, !tbaa !9
  %7 = icmp eq i32 %6, 0
  br i1 %7, label %8, label %9

8:                                                ; preds = %2
  store double 1.000000e+00, ptr %5, align 8, !tbaa !5
  br label %37

9:                                                ; preds = %2
  %10 = load double, ptr %3, align 8, !tbaa !5
  %11 = fcmp oeq double %10, 0.000000e+00
  br i1 %11, label %12, label %22

12:                                               ; preds = %9
  %13 = load i32, ptr %4, align 4, !tbaa !9
  %14 = icmp slt i32 0, %13
  br i1 %14, label %15, label %16

15:                                               ; preds = %12
  store double 0.000000e+00, ptr %5, align 8, !tbaa !5
  br label %21

16:                                               ; preds = %12
  %17 = load double, ptr %3, align 8, !tbaa !5
  %18 = load i32, ptr %4, align 4, !tbaa !9
  %19 = sitofp i32 %18 to double
  %20 = call double @pow(double noundef %17, double noundef %19) #3
  store double %20, ptr %5, align 8, !tbaa !5
  br label %21

21:                                               ; preds = %16, %15
  br label %36

22:                                               ; preds = %9
  %23 = load i32, ptr %4, align 4, !tbaa !9
  %24 = icmp sle i32 1, %23
  br i1 %24, label %25, label %30

25:                                               ; preds = %22
  %26 = load double, ptr %3, align 8, !tbaa !5
  %27 = load i32, ptr %4, align 4, !tbaa !9
  %28 = sitofp i32 %27 to double
  %29 = call double @pow(double noundef %26, double noundef %28) #3
  store double %29, ptr %5, align 8, !tbaa !5
  br label %35

30:                                               ; preds = %22
  %31 = load double, ptr %3, align 8, !tbaa !5
  %32 = load i32, ptr %4, align 4, !tbaa !9
  %33 = sitofp i32 %32 to double
  %34 = call double @pow(double noundef %31, double noundef %33) #3
  store double %34, ptr %5, align 8, !tbaa !5
  br label %35

35:                                               ; preds = %30, %25
  br label %36

36:                                               ; preds = %35, %21
  br label %37

37:                                               ; preds = %36, %8
  %38 = load double, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret double %38
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind "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 = { 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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !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 nounwind willreturn memory(write)
declare double @pow(double noundef, double noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nounwind willreturn memory(write) uwtable
define dso_local double @r8_power(double noundef %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = icmp eq i32 %1, 0
  br i1 %3, label %16, label %4

4:                                                ; preds = %2
  %5 = fcmp oeq double %0, 0.000000e+00
  %6 = icmp sgt i32 %1, 0
  br i1 %5, label %7, label %10

7:                                                ; preds = %4
  br i1 %6, label %16, label %8

8:                                                ; preds = %7
  %9 = sitofp i32 %1 to double
  br label %.sink.split

10:                                               ; preds = %4
  br i1 %6, label %11, label %13

11:                                               ; preds = %10
  %12 = uitofp nneg i32 %1 to double
  br label %.sink.split

13:                                               ; preds = %10
  %14 = sitofp i32 %1 to double
  br label %.sink.split

.sink.split:                                      ; preds = %11, %13, %8
  %.sink = phi double [ %9, %8 ], [ %14, %13 ], [ %12, %11 ]
  %15 = tail call double @pow(double noundef %0, double noundef %.sink) #2
  br label %16

16:                                               ; preds = %.sink.split, %7, %2
  %.0 = phi double [ 1.000000e+00, %2 ], [ 0.000000e+00, %7 ], [ %15, %.sink.split ]
  ret double %.0
}

attributes #0 = { mustprogress nofree nounwind willreturn memory(write) "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 = { mustprogress nofree nounwind willreturn memory(write) 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)"}


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