; LLVM IR from alenic/realGA :: src/algorithms.ll (ZN4RALG6argMinEPfii)

; 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"

; 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 nounwind uwtable
define dso_local noundef i32 @_ZN4RALG6argMinEPfii(ptr noundef %0, i32 noundef %1, i32 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca float, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds float, ptr %10, i64 0
  %12 = load float, ptr %11, align 4, !tbaa !11
  store float %12, ptr %7, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %13 = load i32, ptr %5, align 4, !tbaa !9
  %14 = add nsw i32 %13, 1
  store i32 %14, ptr %9, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %36, %3
  %16 = load i32, ptr %9, align 4, !tbaa !9
  %17 = load i32, ptr %6, align 4, !tbaa !9
  %18 = icmp sle i32 %16, %17
  br i1 %18, label %20, label %19

19:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  br label %39

20:                                               ; preds = %15
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = load i32, ptr %9, align 4, !tbaa !9
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds float, ptr %21, i64 %23
  %25 = load float, ptr %24, align 4, !tbaa !11
  %26 = load float, ptr %7, align 4, !tbaa !11
  %27 = fcmp olt float %25, %26
  br i1 %27, label %28, label %35

28:                                               ; preds = %20
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = load i32, ptr %9, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds float, ptr %29, i64 %31
  %33 = load float, ptr %32, align 4, !tbaa !11
  store float %33, ptr %7, align 4, !tbaa !11
  %34 = load i32, ptr %9, align 4, !tbaa !9
  store i32 %34, ptr %8, align 4, !tbaa !9
  br label %35

35:                                               ; preds = %28, %20
  br label %36

36:                                               ; preds = %35
  %37 = load i32, ptr %9, align 4, !tbaa !9
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr %9, align 4, !tbaa !9
  br label %15, !llvm.loop !13

39:                                               ; preds = %19
  %40 = load i32, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret i32 %40
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"float", !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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef range(i32 -2147483647, -2147483648) i32 @_ZN4RALG6argMinEPfii(ptr nocapture noundef readonly %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not.not15 = icmp slt i32 %1, %2
  br i1 %.not.not15, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %3
  %4 = load float, ptr %0, align 4, !tbaa !5
  %5 = sext i32 %1 to i64
  %wide.trip.count = sext i32 %2 to i64
  %6 = sub nsw i64 %wide.trip.count, %5
  %xtraiter = and i64 %6, 1
  %7 = add nsw i64 %wide.trip.count, -1
  %8 = icmp eq i64 %7, %5
  br i1 %8, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %6, -2
  br label %.lr.ph

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %.1.lcssa.ph = phi i32 [ poison, %.lr.ph.preheader ], [ %.1.1, %.lr.ph ]
  %indvars.iv.unr = phi i64 [ %5, %.lr.ph.preheader ], [ %indvars.iv.next.1, %.lr.ph ]
  %.01117.unr = phi i32 [ 0, %.lr.ph.preheader ], [ %.1.1, %.lr.ph ]
  %.01216.unr = phi float [ %4, %.lr.ph.preheader ], [ %.113.1, %.lr.ph ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.loopexit.unr-lcssa
  %indvars.iv.next.epil = add nsw i64 %indvars.iv.unr, 1
  %9 = getelementptr inbounds float, ptr %0, i64 %indvars.iv.next.epil
  %10 = load float, ptr %9, align 4, !tbaa !5
  %11 = fcmp olt float %10, %.01216.unr
  %12 = trunc nsw i64 %indvars.iv.next.epil to i32
  %.1.epil = select i1 %11, i32 %12, i32 %.01117.unr
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.epil, %._crit_edge.loopexit.unr-lcssa, %3
  %.011.lcssa = phi i32 [ 0, %3 ], [ %.1.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %.1.epil, %.lr.ph.epil ]
  ret i32 %.011.lcssa

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %indvars.iv = phi i64 [ %5, %.lr.ph.preheader.new ], [ %indvars.iv.next.1, %.lr.ph ]
  %.01117 = phi i32 [ 0, %.lr.ph.preheader.new ], [ %.1.1, %.lr.ph ]
  %.01216 = phi float [ %4, %.lr.ph.preheader.new ], [ %.113.1, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.1, %.lr.ph ]
  %indvars.iv.next = add nsw i64 %indvars.iv, 1
  %13 = getelementptr inbounds float, ptr %0, i64 %indvars.iv.next
  %14 = load float, ptr %13, align 4, !tbaa !5
  %15 = fcmp olt float %14, %.01216
  %.113 = select i1 %15, float %14, float %.01216
  %16 = trunc nsw i64 %indvars.iv.next to i32
  %.1 = select i1 %15, i32 %16, i32 %.01117
  %indvars.iv.next.1 = add nsw i64 %indvars.iv, 2
  %17 = getelementptr inbounds float, ptr %0, i64 %indvars.iv.next.1
  %18 = load float, ptr %17, align 4, !tbaa !5
  %19 = fcmp olt float %18, %.113
  %.113.1 = select i1 %19, float %18, float %.113
  %20 = trunc nsw i64 %indvars.iv.next.1 to i32
  %.1.1 = select i1 %19, i32 %20, i32 %.1
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph, !llvm.loop !9
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn 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, !6, i64 0}
!6 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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