; LLVM IR from xuxping/codelife :: leetcode (pow)

; 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 double @myPower2(double noundef %0, i32 noundef %1) #1 {
  %3 = alloca double, align 8
  %4 = alloca double, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store double %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %7 = load i32, ptr %5, align 4, !tbaa !9
  %8 = icmp eq i32 %7, 0
  br i1 %8, label %9, label %10

9:                                                ; preds = %2
  store double 1.000000e+00, ptr %3, align 8
  br label %41

10:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 1, ptr %6, align 4, !tbaa !9
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = icmp slt i32 %11, 0
  br i1 %12, label %13, label %18

13:                                               ; preds = %10
  %14 = load double, ptr %4, align 8, !tbaa !5
  %15 = fdiv double 1.000000e+00, %14
  store double %15, ptr %4, align 8, !tbaa !5
  %16 = load i32, ptr %5, align 4, !tbaa !9
  %17 = sub nsw i32 0, %16
  store i32 %17, ptr %5, align 4, !tbaa !9
  br label %18

18:                                               ; preds = %13, %10
  br label %19

19:                                               ; preds = %32, %18
  %20 = load i32, ptr %5, align 4, !tbaa !9
  %21 = icmp ne i32 %20, 0
  br i1 %21, label %22, label %38

22:                                               ; preds = %19
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = and i32 %23, 1
  %25 = icmp ne i32 %24, 0
  br i1 %25, label %26, label %32

26:                                               ; preds = %22
  %27 = load double, ptr %4, align 8, !tbaa !5
  %28 = load i32, ptr %6, align 4, !tbaa !9
  %29 = sitofp i32 %28 to double
  %30 = fmul double %29, %27
  %31 = fptosi double %30 to i32
  store i32 %31, ptr %6, align 4, !tbaa !9
  br label %32

32:                                               ; preds = %26, %22
  %33 = load double, ptr %4, align 8, !tbaa !5
  %34 = load double, ptr %4, align 8, !tbaa !5
  %35 = fmul double %34, %33
  store double %35, ptr %4, align 8, !tbaa !5
  %36 = load i32, ptr %5, align 4, !tbaa !9
  %37 = ashr i32 %36, 1
  br label %19, !llvm.loop !11

38:                                               ; preds = %19
  %39 = load i32, ptr %6, align 4, !tbaa !9
  %40 = sitofp i32 %39 to double
  store double %40, ptr %3, align 8
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %41

41:                                               ; preds = %38, %9
  %42 = load double, ptr %3, align 8
  ret double %42
}

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 = !{!"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}
!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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef double @myPower2(double noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i32 %1, 0
  tail call void @llvm.assume(i1 %3)
  ret double 1.000000e+00
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: write)
declare void @llvm.assume(i1 noundef) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: write) }

!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,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopInstSimplifyPass,LoopSimplifyCFGPass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass