; LLVM IR from machinefi/psa-crypto-esp32 :: crypto (ecc)

; 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: nounwind uwtable
define dso_local i32 @uECC_vli_isZero(ptr noundef %0, i8 noundef signext %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i8, align 1
  %5 = alloca i32, align 4
  %6 = alloca i8, align 1
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i8 %1, ptr %4, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !10
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #2
  store i8 0, ptr %6, align 1, !tbaa !9
  br label %7

7:                                                ; preds = %21, %2
  %8 = load i8, ptr %6, align 1, !tbaa !9
  %9 = sext i8 %8 to i32
  %10 = load i8, ptr %4, align 1, !tbaa !9
  %11 = sext i8 %10 to i32
  %12 = icmp slt i32 %9, %11
  br i1 %12, label %13, label %24

13:                                               ; preds = %7
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = load i8, ptr %6, align 1, !tbaa !9
  %16 = sext i8 %15 to i64
  %17 = getelementptr inbounds i32, ptr %14, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !10
  %19 = load i32, ptr %5, align 4, !tbaa !10
  %20 = or i32 %19, %18
  store i32 %20, ptr %5, align 4, !tbaa !10
  br label %21

21:                                               ; preds = %13
  %22 = load i8, ptr %6, align 1, !tbaa !9
  %23 = add i8 %22, 1
  store i8 %23, ptr %6, align 1, !tbaa !9
  br label %7, !llvm.loop !12

24:                                               ; preds = %7
  %25 = load i32, ptr %5, align 4, !tbaa !10
  %26 = icmp eq i32 %25, 0
  %27 = zext i1 %26 to i32
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %27
}

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 = { 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 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"int", !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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(argmem: read) uwtable
define dso_local range(i32 0, 2) i32 @uECC_vli_isZero(ptr nocapture noundef readonly %0, i8 noundef signext %1) local_unnamed_addr #0 {
  %3 = icmp sgt i8 %1, 0
  br i1 %3, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %wide.trip.count = zext nneg i8 %1 to i64
  %min.iters.check = icmp ult i8 %1, 8
  br i1 %min.iters.check, label %.lr.ph.preheader12, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %wide.trip.count, 120
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.phi = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %6, %vector.body ]
  %vec.phi10 = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %7, %vector.body ]
  %4 = getelementptr inbounds i32, ptr %0, i64 %index
  %5 = getelementptr inbounds i8, ptr %4, i64 16
  %wide.load = load <4 x i32>, ptr %4, align 4, !tbaa !5
  %wide.load11 = load <4 x i32>, ptr %5, align 4, !tbaa !5
  %6 = or <4 x i32> %wide.load, %vec.phi
  %7 = or <4 x i32> %wide.load11, %vec.phi10
  %index.next = add nuw i64 %index, 8
  %8 = icmp eq i64 %index.next, %n.vec
  br i1 %8, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %bin.rdx = or <4 x i32> %7, %6
  %9 = tail call i32 @llvm.vector.reduce.or.v4i32(<4 x i32> %bin.rdx)
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge.loopexit, label %.lr.ph.preheader12

.lr.ph.preheader12:                               ; preds = %middle.block, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %.067.ph = phi i32 [ 0, %.lr.ph.preheader ], [ %9, %middle.block ]
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader12, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ %indvars.iv.ph, %.lr.ph.preheader12 ]
  %.067 = phi i32 [ %12, %.lr.ph ], [ %.067.ph, %.lr.ph.preheader12 ]
  %10 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = or i32 %11, %.067
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !13

._crit_edge.loopexit:                             ; preds = %.lr.ph, %middle.block
  %.lcssa = phi i32 [ %9, %middle.block ], [ %12, %.lr.ph ]
  %13 = icmp eq i32 %.lcssa, 0
  %14 = zext i1 %13 to i32
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %2
  %.06.lcssa = phi i32 [ 1, %2 ], [ %14, %._crit_edge.loopexit ]
  ret i32 %.06.lcssa
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.or.v4i32(<4 x i32>) #1

attributes #0 = { nofree norecurse nosync nounwind 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" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !12, !11}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass