; LLVM IR from Discngine/fpocket :: src (atom)

; 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"

%struct.s_atm = type { i32, float, float, float, float, float, float, float, [5 x i8], [7 x i8], [16 x i8], [16 x i8], [3 x i8], [8 x i8], i32, i32, i32, i32, i32, i32, i32, float, float, float, float, float, float, float, i8, i8, float, float, float, float, i16, ptr, i32 }

; Function Attrs: nounwind uwtable
define dso_local float @get_mol_mass(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca float, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store float 0.000000e+00, ptr %5, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = icmp ne ptr %7, null
  br i1 %8, label %9, label %27

9:                                                ; preds = %2
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %23, %9
  %11 = load i32, ptr %6, align 4, !tbaa !9
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %14, label %26

14:                                               ; preds = %10
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = load i32, ptr %6, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds %struct.s_atm, ptr %15, i64 %17
  %19 = getelementptr inbounds %struct.s_atm, ptr %18, i32 0, i32 21
  %20 = load float, ptr %19, align 4, !tbaa !13
  %21 = load float, ptr %5, align 4, !tbaa !11
  %22 = fadd float %21, %20
  store float %22, ptr %5, align 4, !tbaa !11
  br label %23

23:                                               ; preds = %14
  %24 = load i32, ptr %6, align 4, !tbaa !9
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %6, align 4, !tbaa !9
  br label %10, !llvm.loop !16

26:                                               ; preds = %10
  br label %27

27:                                               ; preds = %26, %2
  %28 = load float, ptr %5, align 4, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret float %28
}

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

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

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"any pointer", !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 = !{!12, !12, i64 0}
!12 = !{!"float", !7, i64 0}
!13 = !{!14, !12, i64 116}
!14 = !{!"s_atm", !10, i64 0, !12, i64 4, !12, i64 8, !12, i64 12, !12, i64 16, !12, i64 20, !12, i64 24, !12, i64 28, !7, i64 32, !7, i64 37, !7, i64 44, !7, i64 60, !7, i64 76, !7, i64 79, !10, i64 88, !10, i64 92, !10, i64 96, !10, i64 100, !10, i64 104, !10, i64 108, !10, i64 112, !12, i64 116, !12, i64 120, !12, i64 124, !12, i64 128, !12, i64 132, !12, i64 136, !12, i64 140, !7, i64 144, !7, i64 145, !12, i64 148, !12, i64 152, !12, i64 156, !12, i64 160, !15, i64 164, !6, i64 168, !10, i64 176}
!15 = !{!"short", !7, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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"

%struct.s_atm = type { i32, float, float, float, float, float, float, float, [5 x i8], [7 x i8], [16 x i8], [16 x i8], [3 x i8], [8 x i8], i32, i32, i32, i32, i32, i32, i32, float, float, float, float, float, float, float, i8, i8, float, float, float, float, i16, ptr, i32 }

; Function Attrs: nofree norecurse nosync nounwind memory(argmem: read) uwtable
define dso_local float @get_mol_mass(ptr noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %.not = icmp ne ptr %0, null
  %3 = icmp sgt i32 %1, 0
  %or.cond = and i1 %.not, %3
  br i1 %or.cond, label %.lr.ph.preheader, label %.loopexit

.lr.ph.preheader:                                 ; preds = %2
  %wide.trip.count = zext nneg i32 %1 to i64
  %xtraiter = and i64 %wide.trip.count, 3
  %4 = icmp ult i32 %1, 4
  br i1 %4, label %.loopexit.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %wide.trip.count, 2147483644
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader.new ], [ %indvars.iv.next.3, %.lr.ph ]
  %.079 = phi float [ 0.000000e+00, %.lr.ph.preheader.new ], [ %16, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.3, %.lr.ph ]
  %5 = getelementptr inbounds %struct.s_atm, ptr %0, i64 %indvars.iv, i32 21
  %6 = load float, ptr %5, align 4, !tbaa !5
  %7 = fadd float %.079, %6
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %8 = getelementptr inbounds %struct.s_atm, ptr %0, i64 %indvars.iv.next, i32 21
  %9 = load float, ptr %8, align 4, !tbaa !5
  %10 = fadd float %7, %9
  %indvars.iv.next.1 = or disjoint i64 %indvars.iv, 2
  %11 = getelementptr inbounds %struct.s_atm, ptr %0, i64 %indvars.iv.next.1, i32 21
  %12 = load float, ptr %11, align 4, !tbaa !5
  %13 = fadd float %10, %12
  %indvars.iv.next.2 = or disjoint i64 %indvars.iv, 3
  %14 = getelementptr inbounds %struct.s_atm, ptr %0, i64 %indvars.iv.next.2, i32 21
  %15 = load float, ptr %14, align 4, !tbaa !5
  %16 = fadd float %13, %15
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %niter.next.3 = add i64 %niter, 4
  %niter.ncmp.3 = icmp eq i64 %niter.next.3, %unroll_iter
  br i1 %niter.ncmp.3, label %.loopexit.loopexit.unr-lcssa, label %.lr.ph, !llvm.loop !13

.loopexit.loopexit.unr-lcssa:                     ; preds = %.lr.ph, %.lr.ph.preheader
  %.lcssa.ph = phi float [ poison, %.lr.ph.preheader ], [ %16, %.lr.ph ]
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next.3, %.lr.ph ]
  %.079.unr = phi float [ 0.000000e+00, %.lr.ph.preheader ], [ %16, %.lr.ph ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.loopexit, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %.loopexit.loopexit.unr-lcssa, %.lr.ph.epil
  %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %.lr.ph.epil ], [ %indvars.iv.unr, %.loopexit.loopexit.unr-lcssa ]
  %.079.epil = phi float [ %19, %.lr.ph.epil ], [ %.079.unr, %.loopexit.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %.loopexit.loopexit.unr-lcssa ]
  %17 = getelementptr inbounds %struct.s_atm, ptr %0, i64 %indvars.iv.epil, i32 21
  %18 = load float, ptr %17, align 4, !tbaa !5
  %19 = fadd float %.079.epil, %18
  %indvars.iv.next.epil = add nuw nsw i64 %indvars.iv.epil, 1
  %epil.iter.next = add i64 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i64 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %.loopexit, label %.lr.ph.epil, !llvm.loop !15

.loopexit:                                        ; preds = %.loopexit.loopexit.unr-lcssa, %.lr.ph.epil, %2
  %.1 = phi float [ 0.000000e+00, %2 ], [ %.lcssa.ph, %.loopexit.loopexit.unr-lcssa ], [ %19, %.lr.ph.epil ]
  ret float %.1
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: read) 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, !10, i64 116}
!6 = !{!"s_atm", !7, i64 0, !10, i64 4, !10, i64 8, !10, i64 12, !10, i64 16, !10, i64 20, !10, i64 24, !10, i64 28, !8, i64 32, !8, i64 37, !8, i64 44, !8, i64 60, !8, i64 76, !8, i64 79, !7, i64 88, !7, i64 92, !7, i64 96, !7, i64 100, !7, i64 104, !7, i64 108, !7, i64 112, !10, i64 116, !10, i64 120, !10, i64 124, !10, i64 128, !10, i64 132, !10, i64 136, !10, i64 140, !8, i64 144, !8, i64 145, !10, i64 148, !10, i64 152, !10, i64 156, !10, i64 160, !11, i64 164, !12, i64 168, !7, i64 176}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"float", !8, i64 0}
!11 = !{!"short", !8, i64 0}
!12 = !{!"any pointer", !8, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.unroll.disable"}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass