; LLVM IR from kylechampley/XrayPhysics :: src/xsec.ll (ZN4xsec14getMassDensityEi)

; 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"

@_ZL10atomicMass = external hidden constant [101 x float], align 16
@_ZL17electronDensities = external hidden constant [101 x float], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef float @_ZN4xsec14getMassDensityEi(ptr noundef nonnull align 8 dereferenceable(2400) %0, i32 noundef %1) #0 align 2 {
  %3 = alloca float, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %6 = load ptr, ptr %4, align 8
  %7 = load i32, ptr %5, align 4, !tbaa !9
  %8 = icmp sle i32 1, %7
  br i1 %8, label %9, label %25

9:                                                ; preds = %2
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = icmp sle i32 %10, 100
  br i1 %11, label %12, label %25

12:                                               ; preds = %9
  %13 = load i32, ptr %5, align 4, !tbaa !9
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [101 x float], ptr @_ZL17electronDensities, i64 0, i64 %14
  %16 = load float, ptr %15, align 4, !tbaa !11
  %17 = load i32, ptr %5, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [101 x float], ptr @_ZL10atomicMass, i64 0, i64 %18
  %20 = load float, ptr %19, align 4, !tbaa !11
  %21 = fmul float %16, %20
  %22 = load i32, ptr %5, align 4, !tbaa !9
  %23 = sitofp i32 %22 to float
  %24 = fdiv float %21, %23
  store float %24, ptr %3, align 4
  br label %26

25:                                               ; preds = %9, %2
  store float 0.000000e+00, ptr %3, align 4
  br label %26

26:                                               ; preds = %25, %12
  %27 = load float, ptr %3, align 4
  ret float %27
}

attributes #0 = { 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" }

!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 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"float", !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"

@_ZL10atomicMass = external hidden local_unnamed_addr constant [101 x float], align 16
@_ZL17electronDensities = external hidden local_unnamed_addr constant [101 x float], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef float @_ZN4xsec14getMassDensityEi(ptr nocapture noundef nonnull readnone align 8 dereferenceable(2400) %0, i32 noundef %1) local_unnamed_addr #0 align 2 {
  %3 = add i32 %1, -1
  %or.cond = icmp ult i32 %3, 100
  br i1 %or.cond, label %4, label %13

4:                                                ; preds = %2
  %5 = zext nneg i32 %1 to i64
  %6 = getelementptr inbounds [101 x float], ptr @_ZL17electronDensities, i64 0, i64 %5
  %7 = load float, ptr %6, align 4, !tbaa !5
  %8 = getelementptr inbounds [101 x float], ptr @_ZL10atomicMass, i64 0, i64 %5
  %9 = load float, ptr %8, align 4, !tbaa !5
  %10 = fmul float %7, %9
  %11 = uitofp nneg i32 %1 to float
  %12 = fdiv float %10, %11
  br label %13

13:                                               ; preds = %2, %4
  %.0 = phi float [ %12, %4 ], [ 0.000000e+00, %2 ]
  ret float %.0
}

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)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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