; LLVM IR from sbischoff-ai/simple-molecular-dynamics :: SimpleMolecularDynamics/SimpleMolecularDynamics/mat.ll (ZN3matmLEd)

; 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.mat = type { ptr, i32, i32 }
%class.vec = type <{ ptr, i32, [4 x i8] }>

; 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: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZN3matmLEd(ptr noundef nonnull align 8 dereferenceable(16) %0, double noundef %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca double, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store double %1, ptr %4, align 8, !tbaa !9
  %6 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !11
  br label %7

7:                                                ; preds = %20, %2
  %8 = load i32, ptr %5, align 4, !tbaa !11
  %9 = getelementptr inbounds %class.mat, ptr %6, i32 0, i32 1
  %10 = load i32, ptr %9, align 8, !tbaa !13
  %11 = icmp slt i32 %8, %10
  br i1 %11, label %12, label %23

12:                                               ; preds = %7
  %13 = load double, ptr %4, align 8, !tbaa !9
  %14 = getelementptr inbounds %class.mat, ptr %6, i32 0, i32 0
  %15 = load ptr, ptr %14, align 8, !tbaa !15
  %16 = load i32, ptr %5, align 4, !tbaa !11
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds %class.vec, ptr %15, i64 %17
  %19 = call noundef nonnull align 8 dereferenceable(12) ptr @_ZN3vecmLEd(ptr noundef nonnull align 8 dereferenceable(12) %18, double noundef %13)
  br label %20

20:                                               ; preds = %12
  %21 = load i32, ptr %5, align 4, !tbaa !11
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %5, align 4, !tbaa !11
  br label %7, !llvm.loop !16

23:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret ptr %6
}

declare noundef nonnull align 8 dereferenceable(12) ptr @_ZN3vecmLEd(ptr noundef nonnull align 8 dereferenceable(12), double noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { "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 = { 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 = !{!"int", !7, i64 0}
!13 = !{!14, !12, i64 8}
!14 = !{!"_ZTS3mat", !6, i64 0, !12, i64 8, !12, i64 12}
!15 = !{!14, !6, 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"

%class.vec = type <{ ptr, i32, [4 x i8] }>

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(16) ptr @_ZN3matmLEd(ptr noundef nonnull readonly returned align 8 dereferenceable(16) %0, double noundef %1) local_unnamed_addr #0 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = load i32, ptr %3, align 8, !tbaa !5
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %2 ]
  %6 = load ptr, ptr %0, align 8, !tbaa !11
  %7 = getelementptr inbounds %class.vec, ptr %6, i64 %indvars.iv
  %8 = tail call noundef nonnull align 8 dereferenceable(12) ptr @_ZN3vecmLEd(ptr noundef nonnull align 8 dereferenceable(12) %7, double noundef %1)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %9 = load i32, ptr %3, align 8, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = icmp slt i64 %indvars.iv.next, %10
  br i1 %11, label %.lr.ph, label %._crit_edge, !llvm.loop !12

._crit_edge:                                      ; preds = %.lr.ph, %2
  ret ptr %0
}

declare noundef nonnull align 8 dereferenceable(12) ptr @_ZN3vecmLEd(ptr noundef nonnull align 8 dereferenceable(12), double noundef) local_unnamed_addr #1

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 = { "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 8}
!6 = !{!"_ZTS3mat", !7, i64 0, !10, i64 8, !10, i64 12}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass