; LLVM IR from suxiaojack/sapDecoder :: src/convert.ll (Z10Char2FloatPfPci)

; 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 @_Z10Char2FloatPfPci(ptr noundef %0, ptr noundef %1, i32 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %37, %3
  %9 = load i32, ptr %7, align 4, !tbaa !9
  %10 = load i32, ptr %6, align 4, !tbaa !9
  %11 = icmp slt i32 %9, %10
  br i1 %11, label %12, label %40

12:                                               ; preds = %8
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = load i32, ptr %7, align 4, !tbaa !9
  %15 = mul nsw i32 %14, 2
  %16 = add nsw i32 %15, 1
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds i8, ptr %13, i64 %17
  %19 = load i8, ptr %18, align 1, !tbaa !11
  %20 = sext i8 %19 to i32
  %21 = shl i32 %20, 8
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = load i32, ptr %7, align 4, !tbaa !9
  %24 = mul nsw i32 %23, 2
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds i8, ptr %22, i64 %25
  %27 = load i8, ptr %26, align 1, !tbaa !11
  %28 = sext i8 %27 to i32
  %29 = and i32 255, %28
  %30 = or i32 %21, %29
  %31 = sitofp i32 %30 to float
  %32 = fdiv float %31, 3.276800e+04
  %33 = load ptr, ptr %4, align 8, !tbaa !5
  %34 = load i32, ptr %7, align 4, !tbaa !9
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds float, ptr %33, i64 %35
  store float %32, ptr %36, align 4, !tbaa !12
  br label %37

37:                                               ; preds = %12
  %38 = load i32, ptr %7, align 4, !tbaa !9
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %7, align 4, !tbaa !9
  br label %8, !llvm.loop !14

40:                                               ; preds = %8
  %41 = load i32, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret i32 %41
}

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 = !{!7, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"float", !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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 memory(argmem: readwrite) uwtable
define dso_local noundef i32 @_Z10Char2FloatPfPci(ptr nocapture noundef writeonly %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp sgt i32 %2, 0
  br i1 %4, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %3
  %wide.trip.count = zext nneg i32 %2 to i64
  %min.iters.check = icmp ult i32 %2, 4
  br i1 %min.iters.check, label %.lr.ph.preheader13, label %vector.memcheck

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %5 = shl nuw nsw i64 %wide.trip.count, 2
  %scevgep = getelementptr i8, ptr %0, i64 %5
  %6 = shl nuw nsw i64 %wide.trip.count, 1
  %scevgep11 = getelementptr i8, ptr %1, i64 %6
  %bound0 = icmp ugt ptr %scevgep11, %0
  %bound1 = icmp ugt ptr %scevgep, %1
  %found.conflict = and i1 %bound0, %bound1
  br i1 %found.conflict, label %.lr.ph.preheader13, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %wide.trip.count, 2147483644
  %invariant.gep = getelementptr i8, ptr %1, i64 -1
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %7 = shl nuw nsw i64 %index, 1
  %8 = or disjoint i64 %7, 1
  %gep = getelementptr i8, ptr %invariant.gep, i64 %8
  %wide.vec = load <8 x i8>, ptr %gep, align 1, !tbaa !5
  %strided.vec = shufflevector <8 x i8> %wide.vec, <8 x i8> poison, <4 x i32> <i32 0, i32 2, i32 4, i32 6>
  %strided.vec12 = shufflevector <8 x i8> %wide.vec, <8 x i8> poison, <4 x i32> <i32 1, i32 3, i32 5, i32 7>
  %9 = sext <4 x i8> %strided.vec12 to <4 x i32>
  %10 = shl nsw <4 x i32> %9, <i32 8, i32 8, i32 8, i32 8>
  %11 = zext <4 x i8> %strided.vec to <4 x i32>
  %12 = or disjoint <4 x i32> %10, %11
  %13 = sitofp <4 x i32> %12 to <4 x float>
  %14 = fmul <4 x float> %13, <float 0x3F00000000000000, float 0x3F00000000000000, float 0x3F00000000000000, float 0x3F00000000000000>
  %15 = getelementptr inbounds float, ptr %0, i64 %index
  store <4 x float> %14, ptr %15, align 4, !tbaa !8, !alias.scope !10, !noalias !13
  %index.next = add nuw i64 %index, 4
  %16 = icmp eq i64 %index.next, %n.vec
  br i1 %16, label %middle.block, label %vector.body, !llvm.loop !15

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader13

.lr.ph.preheader13:                               ; preds = %middle.block, %vector.memcheck, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %wide.trip.count, 1
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader13
  %17 = shl nuw nsw i64 %indvars.iv.ph, 1
  %18 = or disjoint i64 %17, 1
  %19 = getelementptr inbounds i8, ptr %1, i64 %18
  %20 = load i8, ptr %19, align 1, !tbaa !5
  %21 = sext i8 %20 to i32
  %22 = shl nsw i32 %21, 8
  %23 = getelementptr inbounds i8, ptr %1, i64 %17
  %24 = load i8, ptr %23, align 1, !tbaa !5
  %25 = zext i8 %24 to i32
  %26 = or disjoint i32 %22, %25
  %27 = sitofp i32 %26 to float
  %28 = fmul float %27, 0x3F00000000000000
  %29 = getelementptr inbounds float, ptr %0, i64 %indvars.iv.ph
  store float %28, ptr %29, align 4, !tbaa !8
  %indvars.iv.next.prol = or disjoint i64 %indvars.iv.ph, 1
  br label %.lr.ph.prol.loopexit

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader13
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %.lr.ph.preheader13 ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %30 = add nsw i64 %wide.trip.count, -1
  %31 = icmp eq i64 %indvars.iv.ph, %30
  br i1 %31, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.1, %.lr.ph ], [ %indvars.iv.unr, %.lr.ph.prol.loopexit ]
  %32 = shl nuw nsw i64 %indvars.iv, 1
  %33 = or disjoint i64 %32, 1
  %34 = getelementptr inbounds i8, ptr %1, i64 %33
  %35 = load i8, ptr %34, align 1, !tbaa !5
  %36 = sext i8 %35 to i32
  %37 = shl nsw i32 %36, 8
  %38 = getelementptr inbounds i8, ptr %1, i64 %32
  %39 = load i8, ptr %38, align 1, !tbaa !5
  %40 = zext i8 %39 to i32
  %41 = or disjoint i32 %37, %40
  %42 = sitofp i32 %41 to float
  %43 = fmul float %42, 0x3F00000000000000
  %44 = getelementptr inbounds float, ptr %0, i64 %indvars.iv
  store float %43, ptr %44, align 4, !tbaa !8
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %45 = shl nuw nsw i64 %indvars.iv.next, 1
  %46 = or disjoint i64 %45, 1
  %47 = getelementptr inbounds i8, ptr %1, i64 %46
  %48 = load i8, ptr %47, align 1, !tbaa !5
  %49 = sext i8 %48 to i32
  %50 = shl nsw i32 %49, 8
  %51 = getelementptr inbounds i8, ptr %1, i64 %45
  %52 = load i8, ptr %51, align 1, !tbaa !5
  %53 = zext i8 %52 to i32
  %54 = or disjoint i32 %50, %53
  %55 = sitofp i32 %54 to float
  %56 = fmul float %55, 0x3F00000000000000
  %57 = getelementptr inbounds float, ptr %0, i64 %indvars.iv.next
  store float %56, ptr %57, align 4, !tbaa !8
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %exitcond.not.1 = icmp eq i64 %indvars.iv.next.1, %wide.trip.count
  br i1 %exitcond.not.1, label %._crit_edge, label %.lr.ph, !llvm.loop !19

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %middle.block, %3
  %.0.lcssa = phi i32 [ 0, %3 ], [ %2, %middle.block ], [ %2, %.lr.ph ], [ %2, %.lr.ph.prol.loopexit ]
  ret i32 %.0.lcssa
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(argmem: readwrite) 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"float", !6, i64 0}
!10 = !{!11}
!11 = distinct !{!11, !12}
!12 = distinct !{!12, !"LVerDomain"}
!13 = !{!14}
!14 = distinct !{!14, !12}
!15 = distinct !{!15, !16, !17, !18}
!16 = !{!"llvm.loop.mustprogress"}
!17 = !{!"llvm.loop.isvectorized", i32 1}
!18 = !{!"llvm.loop.unroll.runtime.disable"}
!19 = distinct !{!19, !16, !17}


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