; LLVM IR from AlgoGenesis/C :: Infix to Prefix/conversion (program)

; 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 @isValidInfix(ptr noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %7

7:                                                ; preds = %43, %1
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = load i32, ptr %5, align 4, !tbaa !9
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds i8, ptr %8, i64 %10
  %12 = load i8, ptr %11, align 1, !tbaa !11
  %13 = sext i8 %12 to i32
  %14 = icmp ne i32 %13, 0
  br i1 %14, label %16, label %15

15:                                               ; preds = %7
  store i32 2, ptr %6, align 4
  br label %46

16:                                               ; preds = %7
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = load i32, ptr %5, align 4, !tbaa !9
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds i8, ptr %17, i64 %19
  %21 = load i8, ptr %20, align 1, !tbaa !11
  %22 = sext i8 %21 to i32
  %23 = icmp eq i32 %22, 40
  br i1 %23, label %24, label %27

24:                                               ; preds = %16
  %25 = load i32, ptr %4, align 4, !tbaa !9
  %26 = add nsw i32 %25, 1
  store i32 %26, ptr %4, align 4, !tbaa !9
  br label %27

27:                                               ; preds = %24, %16
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = load i32, ptr %5, align 4, !tbaa !9
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds i8, ptr %28, i64 %30
  %32 = load i8, ptr %31, align 1, !tbaa !11
  %33 = sext i8 %32 to i32
  %34 = icmp eq i32 %33, 41
  br i1 %34, label %35, label %38

35:                                               ; preds = %27
  %36 = load i32, ptr %4, align 4, !tbaa !9
  %37 = add nsw i32 %36, -1
  store i32 %37, ptr %4, align 4, !tbaa !9
  br label %38

38:                                               ; preds = %35, %27
  %39 = load i32, ptr %4, align 4, !tbaa !9
  %40 = icmp slt i32 %39, 0
  br i1 %40, label %41, label %42

41:                                               ; preds = %38
  store i32 0, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %46

42:                                               ; preds = %38
  br label %43

43:                                               ; preds = %42
  %44 = load i32, ptr %5, align 4, !tbaa !9
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %5, align 4, !tbaa !9
  br label %7, !llvm.loop !12

46:                                               ; preds = %41, %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  %47 = load i32, ptr %6, align 4
  switch i32 %47, label %52 [
    i32 2, label %48
  ]

48:                                               ; preds = %46
  %49 = load i32, ptr %4, align 4, !tbaa !9
  %50 = icmp eq i32 %49, 0
  %51 = zext i1 %50 to i32
  store i32 %51, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %52

52:                                               ; preds = %48, %46
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %53 = load i32, ptr %2, align 4
  ret i32 %53
}

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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !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 @isValidInfix(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = load i8, ptr %0, align 1, !tbaa !5
  %.not19 = icmp eq i8 %2, 0
  br i1 %.not19, label %.loopexit, label %.lr.ph

3:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %4 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next
  %5 = load i8, ptr %4, align 1, !tbaa !5
  %.not = icmp eq i8 %5, 0
  br i1 %.not, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !8

._crit_edge.loopexit:                             ; preds = %3
  %6 = icmp eq i32 %.2, 0
  %7 = zext i1 %6 to i32
  br label %.loopexit

.lr.ph:                                           ; preds = %1, %3
  %indvars.iv = phi i64 [ %indvars.iv.next, %3 ], [ 0, %1 ]
  %8 = phi i8 [ %5, %3 ], [ %2, %1 ]
  %.01320 = phi i32 [ %.2, %3 ], [ 0, %1 ]
  %9 = icmp eq i8 %8, 40
  %10 = zext i1 %9 to i32
  %spec.select = add nuw nsw i32 %.01320, %10
  %11 = icmp eq i8 %8, 41
  %12 = sext i1 %11 to i32
  %.2 = add nsw i32 %spec.select, %12
  %13 = icmp slt i32 %.2, 0
  br i1 %13, label %.loopexit, label %3

.loopexit:                                        ; preds = %.lr.ph, %1, %._crit_edge.loopexit
  %spec.select17 = phi i32 [ 1, %1 ], [ %7, %._crit_edge.loopexit ], [ 0, %.lr.ph ]
  ret i32 %spec.select17
}

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" }

!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/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


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