; LLVM IR from FedericaPaoli1/stm32-speech-recognition-and-traduction :: Drivers/CMSIS/DSP/Source/StatisticsFunctions (arm_max_no_idx_f32)

; 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: nounwind uwtable
define dso_local void @arm_max_no_idx_f32(ptr noundef %0, i32 noundef %1, ptr noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca float, align 4
  %8 = alloca float, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store float 0xC7EFFFFFE0000000, ptr %7, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  br label %9

9:                                                ; preds = %21, %3
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = icmp ugt i32 %10, 0
  br i1 %11, label %12, label %24

12:                                               ; preds = %9
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = getelementptr inbounds float, ptr %13, i32 1
  store ptr %14, ptr %4, align 8, !tbaa !5
  %15 = load float, ptr %13, align 4, !tbaa !11
  store float %15, ptr %8, align 4, !tbaa !11
  %16 = load float, ptr %7, align 4, !tbaa !11
  %17 = load float, ptr %8, align 4, !tbaa !11
  %18 = fcmp olt float %16, %17
  br i1 %18, label %19, label %21

19:                                               ; preds = %12
  %20 = load float, ptr %8, align 4, !tbaa !11
  store float %20, ptr %7, align 4, !tbaa !11
  br label %21

21:                                               ; preds = %19, %12
  %22 = load i32, ptr %5, align 4, !tbaa !9
  %23 = add i32 %22, -1
  store i32 %23, ptr %5, align 4, !tbaa !9
  br label %9, !llvm.loop !13

24:                                               ; preds = %9
  %25 = load float, ptr %7, align 4, !tbaa !11
  %26 = load ptr, ptr %6, align 8, !tbaa !5
  store float %25, ptr %26, align 4, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret void
}

; 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 = 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: nofree norecurse nosync nounwind memory(read, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local void @arm_max_no_idx_f32(ptr nocapture noundef readonly %0, i32 noundef %1, ptr nocapture noundef writeonly %2) local_unnamed_addr #0 {
  %.not10 = icmp eq i32 %1, 0
  br i1 %.not10, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %xtraiter = and i32 %1, 3
  %lcmp.mod.not = icmp eq i32 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader, %.lr.ph.prol
  %.013.prol = phi ptr [ %4, %.lr.ph.prol ], [ %0, %.lr.ph.preheader ]
  %.0712.prol = phi float [ %.1.prol, %.lr.ph.prol ], [ 0xC7EFFFFFE0000000, %.lr.ph.preheader ]
  %.0811.prol = phi i32 [ %7, %.lr.ph.prol ], [ %1, %.lr.ph.preheader ]
  %prol.iter = phi i32 [ %prol.iter.next, %.lr.ph.prol ], [ 0, %.lr.ph.preheader ]
  %4 = getelementptr inbounds i8, ptr %.013.prol, i64 4
  %5 = load float, ptr %.013.prol, align 4, !tbaa !5
  %6 = fcmp olt float %.0712.prol, %5
  %.1.prol = select i1 %6, float %5, float %.0712.prol
  %7 = add i32 %.0811.prol, -1
  %prol.iter.next = add i32 %prol.iter, 1
  %prol.iter.cmp.not = icmp eq i32 %prol.iter.next, %xtraiter
  br i1 %prol.iter.cmp.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol, !llvm.loop !9

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader
  %.1.lcssa.unr = phi float [ poison, %.lr.ph.preheader ], [ %.1.prol, %.lr.ph.prol ]
  %.013.unr = phi ptr [ %0, %.lr.ph.preheader ], [ %4, %.lr.ph.prol ]
  %.0712.unr = phi float [ 0xC7EFFFFFE0000000, %.lr.ph.preheader ], [ %.1.prol, %.lr.ph.prol ]
  %.0811.unr = phi i32 [ %1, %.lr.ph.preheader ], [ %7, %.lr.ph.prol ]
  %8 = icmp ult i32 %1, 4
  br i1 %8, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %.013 = phi ptr [ %18, %.lr.ph ], [ %.013.unr, %.lr.ph.prol.loopexit ]
  %.0712 = phi float [ %.1.3, %.lr.ph ], [ %.0712.unr, %.lr.ph.prol.loopexit ]
  %.0811 = phi i32 [ %21, %.lr.ph ], [ %.0811.unr, %.lr.ph.prol.loopexit ]
  %9 = getelementptr inbounds i8, ptr %.013, i64 4
  %10 = load float, ptr %.013, align 4, !tbaa !5
  %11 = fcmp olt float %.0712, %10
  %.1 = select i1 %11, float %10, float %.0712
  %12 = getelementptr inbounds i8, ptr %.013, i64 8
  %13 = load float, ptr %9, align 4, !tbaa !5
  %14 = fcmp olt float %.1, %13
  %.1.1 = select i1 %14, float %13, float %.1
  %15 = getelementptr inbounds i8, ptr %.013, i64 12
  %16 = load float, ptr %12, align 4, !tbaa !5
  %17 = fcmp olt float %.1.1, %16
  %.1.2 = select i1 %17, float %16, float %.1.1
  %18 = getelementptr inbounds i8, ptr %.013, i64 16
  %19 = load float, ptr %15, align 4, !tbaa !5
  %20 = fcmp olt float %.1.2, %19
  %.1.3 = select i1 %20, float %19, float %.1.2
  %21 = add i32 %.0811, -4
  %.not.3 = icmp eq i32 %21, 0
  br i1 %.not.3, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %3
  %.07.lcssa = phi float [ 0xC7EFFFFFE0000000, %3 ], [ %.1.lcssa.unr, %.lr.ph.prol.loopexit ], [ %.1.3, %.lr.ph ]
  store float %.07.lcssa, ptr %2, align 4, !tbaa !5
  ret void
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, argmem: readwrite, inaccessiblemem: 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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.unroll.disable"}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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