; LLVM IR from zsiciarz/aquila :: examples/fft_comparison/fft_comparison.ll (Z10differenceSt6vectorISt7complexIdESaIS1_EES3_)

; 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"

%"class.std::complex" = type { { double, double } }

; Function Attrs: mustprogress uwtable
define dso_local noundef double @_Z10differenceSt6vectorISt7complexIdESaIS1_EES3_(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca double, align 8
  %6 = alloca i64, align 8
  %7 = alloca %"class.std::complex", align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  store double 0.000000e+00, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #5
  store i64 0, ptr %6, align 8, !tbaa !11
  br label %8

8:                                                ; preds = %27, %2
  %9 = load i64, ptr %6, align 8, !tbaa !11
  %10 = call noundef i64 @_ZNKSt6vectorISt7complexIdESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #5
  %11 = icmp ult i64 %9, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #5
  br label %30

13:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 16, ptr %7) #5
  %14 = load i64, ptr %6, align 8, !tbaa !11
  %15 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt7complexIdESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %14) #5
  %16 = load i64, ptr %6, align 8, !tbaa !11
  %17 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt7complexIdESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %16) #5
  %18 = call { double, double } @_ZStmiIdESt7complexIT_ERKS2_S4_(ptr noundef nonnull align 8 dereferenceable(16) %15, ptr noundef nonnull align 8 dereferenceable(16) %17)
  %19 = getelementptr inbounds %"class.std::complex", ptr %7, i32 0, i32 0
  %20 = getelementptr inbounds { double, double }, ptr %19, i32 0, i32 0
  %21 = extractvalue { double, double } %18, 0
  store double %21, ptr %20, align 8
  %22 = getelementptr inbounds { double, double }, ptr %19, i32 0, i32 1
  %23 = extractvalue { double, double } %18, 1
  store double %23, ptr %22, align 8
  %24 = call noundef double @_ZSt3absIdET_RKSt7complexIS0_E(ptr noundef nonnull align 8 dereferenceable(16) %7)
  %25 = load double, ptr %5, align 8, !tbaa !9
  %26 = fadd double %25, %24
  store double %26, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 16, ptr %7) #5
  br label %27

27:                                               ; preds = %13
  %28 = load i64, ptr %6, align 8, !tbaa !11
  %29 = add i64 %28, 1
  store i64 %29, ptr %6, align 8, !tbaa !11
  br label %8, !llvm.loop !13

30:                                               ; preds = %12
  %31 = load double, ptr %5, align 8, !tbaa !9
  %32 = call noundef double @_ZSt3absd(double noundef %31)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  ret double %32
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorISt7complexIdESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef double @_ZSt3absIdET_RKSt7complexIS0_E(ptr noundef nonnull align 8 dereferenceable(16)) #3

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local { double, double } @_ZStmiIdESt7complexIT_ERKS2_S4_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt7complexIdESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef double @_ZSt3absd(double noundef) #4

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress 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 = { inlinehint 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" }
attributes #4 = { inlinehint mustprogress 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 #5 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"double", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !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"

%"class.std::complex" = type { { double, double } }

; Function Attrs: mustprogress uwtable
define dso_local noundef double @_Z10differenceSt6vectorISt7complexIdESaIS1_EES3_(ptr noundef nonnull %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = alloca %"class.std::complex", align 8
  %4 = tail call noundef i64 @_ZNKSt6vectorISt7complexIdESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #5
  %.not = icmp eq i64 %4, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %5 = getelementptr inbounds i8, ptr %3, i64 8
  br label %7

._crit_edge:                                      ; preds = %7, %2
  %.05.lcssa = phi double [ 0.000000e+00, %2 ], [ %14, %7 ]
  %6 = call noundef double @_ZSt3absd(double noundef %.05.lcssa)
  ret double %6

7:                                                ; preds = %.lr.ph, %7
  %.07 = phi i64 [ 0, %.lr.ph ], [ %15, %7 ]
  %.056 = phi double [ 0.000000e+00, %.lr.ph ], [ %14, %7 ]
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %3) #5
  %8 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt7complexIdESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %.07) #5
  %9 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt7complexIdESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %.07) #5
  %10 = call { double, double } @_ZStmiIdESt7complexIT_ERKS2_S4_(ptr noundef nonnull align 8 dereferenceable(16) %8, ptr noundef nonnull align 8 dereferenceable(16) %9)
  %11 = extractvalue { double, double } %10, 0
  store double %11, ptr %3, align 8
  %12 = extractvalue { double, double } %10, 1
  store double %12, ptr %5, align 8
  %13 = call noundef double @_ZSt3absIdET_RKSt7complexIS0_E(ptr noundef nonnull align 8 dereferenceable(16) %3)
  %14 = fadd double %.056, %13
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %3) #5
  %15 = add nuw i64 %.07, 1
  %16 = call noundef i64 @_ZNKSt6vectorISt7complexIdESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #5
  %17 = icmp ult i64 %15, %16
  br i1 %17, label %7, label %._crit_edge, !llvm.loop !5
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorISt7complexIdESaIS1_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef double @_ZSt3absIdET_RKSt7complexIS0_E(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #3

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local { double, double } @_ZStmiIdESt7complexIT_ERKS2_S4_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZNSt6vectorISt7complexIdESaIS1_EEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef double @_ZSt3absd(double noundef) local_unnamed_addr #4

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" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress 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 = { inlinehint 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" }
attributes #4 = { inlinehint mustprogress 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 #5 = { 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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