; LLVM IR from stan-dev/math :: lib/sundials_6.1.1/src/sunlinsol/spbcgs (sunlinsol_spbcgs)

; 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._generic_SUNLinearSolver = type { ptr, ptr, ptr }
%struct._SUNLinearSolverContent_SPBCGS = type { i32, i32, i32, i32, double, i32, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, i32, ptr }
%struct._generic_N_Vector = type { ptr, ptr, ptr }
%struct._generic_N_Vector_Ops = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @SUNLinSolSpace_SPBCGS(ptr noundef %0, ptr noundef %1, ptr noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct._generic_SUNLinearSolver, ptr %9, i32 0, i32 0
  %11 = load ptr, ptr %10, align 8, !tbaa !9
  %12 = getelementptr inbounds %struct._SUNLinearSolverContent_SPBCGS, ptr %11, i32 0, i32 19
  %13 = load ptr, ptr %12, align 8, !tbaa !11
  %14 = getelementptr inbounds %struct._generic_N_Vector, ptr %13, i32 0, i32 1
  %15 = load ptr, ptr %14, align 8, !tbaa !15
  %16 = getelementptr inbounds %struct._generic_N_Vector_Ops, ptr %15, i32 0, i32 4
  %17 = load ptr, ptr %16, align 8, !tbaa !17
  %18 = icmp ne ptr %17, null
  br i1 %18, label %19, label %25

19:                                               ; preds = %3
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct._generic_SUNLinearSolver, ptr %20, i32 0, i32 0
  %22 = load ptr, ptr %21, align 8, !tbaa !9
  %23 = getelementptr inbounds %struct._SUNLinearSolverContent_SPBCGS, ptr %22, i32 0, i32 19
  %24 = load ptr, ptr %23, align 8, !tbaa !11
  call void @N_VSpace(ptr noundef %24, ptr noundef %8, ptr noundef %7)
  br label %26

25:                                               ; preds = %3
  store i64 0, ptr %7, align 8, !tbaa !19
  store i64 0, ptr %8, align 8, !tbaa !19
  br label %26

26:                                               ; preds = %25, %19
  %27 = load i64, ptr %8, align 8, !tbaa !19
  %28 = mul nsw i64 %27, 9
  %29 = load ptr, ptr %5, align 8, !tbaa !5
  store i64 %28, ptr %29, align 8, !tbaa !19
  %30 = load i64, ptr %7, align 8, !tbaa !19
  %31 = mul nsw i64 %30, 9
  %32 = load ptr, ptr %6, align 8, !tbaa !5
  store i64 %31, ptr %32, align 8, !tbaa !19
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  ret i32 0
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

declare void @N_VSpace(ptr noundef, ptr noundef, ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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/C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"_generic_SUNLinearSolver", !6, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!12, !6, i64 136}
!12 = !{!"_SUNLinearSolverContent_SPBCGS", !13, i64 0, !13, i64 4, !13, i64 8, !13, i64 12, !14, i64 16, !13, i64 24, !6, i64 32, !6, i64 40, !6, i64 48, !6, i64 56, !6, i64 64, !6, i64 72, !6, i64 80, !6, i64 88, !6, i64 96, !6, i64 104, !6, i64 112, !6, i64 120, !6, i64 128, !6, i64 136, !13, i64 144, !6, i64 152}
!13 = !{!"int", !7, i64 0}
!14 = !{!"double", !7, i64 0}
!15 = !{!16, !6, i64 8}
!16 = !{!"_generic_N_Vector", !6, i64 0, !6, i64 8, !6, i64 16}
!17 = !{!18, !6, i64 32}
!18 = !{!"_generic_N_Vector_Ops", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !6, i64 48, !6, i64 56, !6, i64 64, !6, i64 72, !6, i64 80, !6, i64 88, !6, i64 96, !6, i64 104, !6, i64 112, !6, i64 120, !6, i64 128, !6, i64 136, !6, i64 144, !6, i64 152, !6, i64 160, !6, i64 168, !6, i64 176, !6, i64 184, !6, i64 192, !6, i64 200, !6, i64 208, !6, i64 216, !6, i64 224, !6, i64 232, !6, i64 240, !6, i64 248, !6, i64 256, !6, i64 264, !6, i64 272, !6, i64 280, !6, i64 288, !6, i64 296, !6, i64 304, !6, i64 312, !6, i64 320, !6, i64 328, !6, i64 336, !6, i64 344, !6, i64 352, !6, i64 360, !6, i64 368, !6, i64 376, !6, i64 384, !6, i64 392, !6, i64 400, !6, i64 408, !6, i64 416, !6, i64 424, !6, i64 432}
!19 = !{!20, !20, i64 0}
!20 = !{!"long", !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"

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @SUNLinSolSpace_SPBCGS(ptr nocapture noundef readonly %0, ptr nocapture noundef writeonly %1, ptr nocapture noundef writeonly %2) local_unnamed_addr #1 {
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %5) #3
  %6 = load ptr, ptr %0, align 8, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %6, i64 136
  %8 = load ptr, ptr %7, align 8, !tbaa !10
  %9 = getelementptr inbounds i8, ptr %8, i64 8
  %10 = load ptr, ptr %9, align 8, !tbaa !14
  %11 = getelementptr inbounds i8, ptr %10, i64 32
  %12 = load ptr, ptr %11, align 8, !tbaa !16
  %.not = icmp eq ptr %12, null
  br i1 %.not, label %16, label %13

13:                                               ; preds = %3
  call void @N_VSpace(ptr noundef nonnull %8, ptr noundef nonnull %5, ptr noundef nonnull %4) #3
  %.pre = load i64, ptr %5, align 8, !tbaa !18
  %.pre4 = load i64, ptr %4, align 8, !tbaa !18
  %14 = mul nsw i64 %.pre, 9
  %15 = mul nsw i64 %.pre4, 9
  br label %16

16:                                               ; preds = %3, %13
  %17 = phi i64 [ %15, %13 ], [ 0, %3 ]
  %18 = phi i64 [ %14, %13 ], [ 0, %3 ]
  store i64 %18, ptr %1, align 8, !tbaa !18
  store i64 %17, ptr %2, align 8, !tbaa !18
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  ret i32 0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

declare void @N_VSpace(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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, !7, i64 0}
!6 = !{!"_generic_SUNLinearSolver", !7, i64 0, !7, i64 8, !7, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!11, !7, i64 136}
!11 = !{!"_SUNLinearSolverContent_SPBCGS", !12, i64 0, !12, i64 4, !12, i64 8, !12, i64 12, !13, i64 16, !12, i64 24, !7, i64 32, !7, i64 40, !7, i64 48, !7, i64 56, !7, i64 64, !7, i64 72, !7, i64 80, !7, i64 88, !7, i64 96, !7, i64 104, !7, i64 112, !7, i64 120, !7, i64 128, !7, i64 136, !12, i64 144, !7, i64 152}
!12 = !{!"int", !8, i64 0}
!13 = !{!"double", !8, i64 0}
!14 = !{!15, !7, i64 8}
!15 = !{!"_generic_N_Vector", !7, i64 0, !7, i64 8, !7, i64 16}
!16 = !{!17, !7, i64 32}
!17 = !{!"_generic_N_Vector_Ops", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24, !7, i64 32, !7, i64 40, !7, i64 48, !7, i64 56, !7, i64 64, !7, i64 72, !7, i64 80, !7, i64 88, !7, i64 96, !7, i64 104, !7, i64 112, !7, i64 120, !7, i64 128, !7, i64 136, !7, i64 144, !7, i64 152, !7, i64 160, !7, i64 168, !7, i64 176, !7, i64 184, !7, i64 192, !7, i64 200, !7, i64 208, !7, i64 216, !7, i64 224, !7, i64 232, !7, i64 240, !7, i64 248, !7, i64 256, !7, i64 264, !7, i64 272, !7, i64 280, !7, i64 288, !7, i64 296, !7, i64 304, !7, i64 312, !7, i64 320, !7, i64 328, !7, i64 336, !7, i64 344, !7, i64 352, !7, i64 360, !7, i64 368, !7, i64 376, !7, i64 384, !7, i64 392, !7, i64 400, !7, i64 408, !7, i64 416, !7, i64 424, !7, i64 432}
!18 = !{!19, !19, i64 0}
!19 = !{!"long", !8, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass