; LLVM IR from codemistic/Data-Structures-and-Algorithms :: CPP/LINKED LIST/CIRCULAR LINKED LIST/test.ll (Z5powerii)

; 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: mustprogress uwtable
define dso_local noundef i32 @_Z5powerii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  %6 = load i32, ptr %4, align 4, !tbaa !5
  %7 = icmp eq i32 %6, 1
  br i1 %7, label %11, label %8

8:                                                ; preds = %2
  %9 = load i32, ptr %5, align 4, !tbaa !5
  %10 = icmp eq i32 %9, 1
  br i1 %10, label %11, label %13

11:                                               ; preds = %8, %2
  %12 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %12, ptr %3, align 4
  br label %28

13:                                               ; preds = %8
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = icmp eq i32 %14, 0
  br i1 %15, label %16, label %17

16:                                               ; preds = %13
  store i32 1, ptr %3, align 4
  br label %28

17:                                               ; preds = %13
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = icmp eq i32 %18, 0
  br i1 %19, label %20, label %21

20:                                               ; preds = %17
  store i32 0, ptr %3, align 4
  br label %28

21:                                               ; preds = %17
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = sub nsw i32 %24, 1
  %26 = call noundef i32 @_Z5powerii(i32 noundef %23, i32 noundef %25)
  %27 = mul nsw i32 %22, %26
  store i32 %27, ptr %3, align 4
  br label %28

28:                                               ; preds = %21, %20, %16, %11
  %29 = load i32, ptr %3, align 4
  ret i32 %29
}

attributes #0 = { mustprogress 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; 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 i32 @_Z5powerii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i32 %0, 1
  %4 = icmp eq i32 %1, 1
  %or.cond13 = or i1 %3, %4
  br i1 %or.cond13, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %5 = icmp eq i32 %0, 0
  br i1 %5, label %.lr.ph.split.us, label %.lr.ph.split.split

.lr.ph.split.us:                                  ; preds = %.lr.ph
  %6 = icmp eq i32 %1, 0
  %spec.select = zext i1 %6 to i32
  br label %._crit_edge

.lr.ph.split.split:                               ; preds = %.lr.ph, %tailrecurse
  %.tr1215 = phi i32 [ %8, %tailrecurse ], [ %1, %.lr.ph ]
  %accumulator.tr14 = phi i32 [ %9, %tailrecurse ], [ 1, %.lr.ph ]
  %7 = icmp eq i32 %.tr1215, 0
  br i1 %7, label %._crit_edge, label %tailrecurse

tailrecurse:                                      ; preds = %.lr.ph.split.split
  %8 = add nsw i32 %.tr1215, -1
  %9 = mul nsw i32 %accumulator.tr14, %0
  %10 = icmp eq i32 %8, 1
  br i1 %10, label %._crit_edge, label %.lr.ph.split.split

._crit_edge:                                      ; preds = %tailrecurse, %.lr.ph.split.split, %.lr.ph.split.us, %2
  %accumulator.tr.lcssa = phi i32 [ 1, %2 ], [ 1, %.lr.ph.split.us ], [ %accumulator.tr14, %.lr.ph.split.split ], [ %9, %tailrecurse ]
  %.0 = phi i32 [ %0, %2 ], [ %spec.select, %.lr.ph.split.us ], [ 1, %.lr.ph.split.split ], [ %0, %tailrecurse ]
  %accumulator.ret.tr = mul nsw i32 %.0, %accumulator.tr.lcssa
  ret i32 %accumulator.ret.tr
}

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" }

!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: GVNPass,GlobalOptPass,IPSCCPPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass