; LLVM IR from HarshCasper/NeoAlgo :: C-Plus-Plus/stack/evaluate_postfix.ll (Z9operationcii)

; 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z9operationcii(i8 noundef signext %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca i8, align 1
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i8 %0, ptr %5, align 1, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !8
  store i32 %2, ptr %7, align 4, !tbaa !8
  %8 = load i8, ptr %5, align 1, !tbaa !5
  %9 = sext i8 %8 to i32
  %10 = icmp eq i32 %9, 43
  br i1 %10, label %11, label %15

11:                                               ; preds = %3
  %12 = load i32, ptr %6, align 4, !tbaa !8
  %13 = load i32, ptr %7, align 4, !tbaa !8
  %14 = add nsw i32 %12, %13
  store i32 %14, ptr %4, align 4
  br label %43

15:                                               ; preds = %3
  %16 = load i8, ptr %5, align 1, !tbaa !5
  %17 = sext i8 %16 to i32
  %18 = icmp eq i32 %17, 45
  br i1 %18, label %19, label %23

19:                                               ; preds = %15
  %20 = load i32, ptr %6, align 4, !tbaa !8
  %21 = load i32, ptr %7, align 4, !tbaa !8
  %22 = sub nsw i32 %20, %21
  store i32 %22, ptr %4, align 4
  br label %43

23:                                               ; preds = %15
  %24 = load i8, ptr %5, align 1, !tbaa !5
  %25 = sext i8 %24 to i32
  %26 = icmp eq i32 %25, 42
  br i1 %26, label %27, label %31

27:                                               ; preds = %23
  %28 = load i32, ptr %6, align 4, !tbaa !8
  %29 = load i32, ptr %7, align 4, !tbaa !8
  %30 = mul nsw i32 %28, %29
  store i32 %30, ptr %4, align 4
  br label %43

31:                                               ; preds = %23
  %32 = load i8, ptr %5, align 1, !tbaa !5
  %33 = sext i8 %32 to i32
  %34 = icmp eq i32 %33, 47
  br i1 %34, label %35, label %39

35:                                               ; preds = %31
  %36 = load i32, ptr %6, align 4, !tbaa !8
  %37 = load i32, ptr %7, align 4, !tbaa !8
  %38 = sdiv i32 %36, %37
  store i32 %38, ptr %4, align 4
  br label %43

39:                                               ; preds = %31
  br label %40

40:                                               ; preds = %39
  br label %41

41:                                               ; preds = %40
  br label %42

42:                                               ; preds = %41
  unreachable

43:                                               ; preds = %35, %27, %19, %11
  %44 = load i32, ptr %4, align 4
  ret i32 %44
}

attributes #0 = { 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" }

!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 = !{!"int", !6, i64 0}


; 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(inaccessiblemem: write) uwtable
define dso_local noundef i32 @_Z9operationcii(i8 noundef signext %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  switch i8 %0, label %10 [
    i8 43, label %4
    i8 45, label %6
    i8 42, label %8
  ]

4:                                                ; preds = %3
  %5 = add nsw i32 %2, %1
  br label %13

6:                                                ; preds = %3
  %7 = sub nsw i32 %1, %2
  br label %13

8:                                                ; preds = %3
  %9 = mul nsw i32 %2, %1
  br label %13

10:                                               ; preds = %3
  %11 = icmp eq i8 %0, 47
  tail call void @llvm.assume(i1 %11)
  %12 = sdiv i32 %1, %2
  br label %13

13:                                               ; preds = %10, %8, %6, %4
  %.0 = phi i32 [ %5, %4 ], [ %7, %6 ], [ %9, %8 ], [ %12, %10 ]
  ret i32 %.0
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: write)
declare void @llvm.assume(i1 noundef) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(inaccessiblemem: write) 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(inaccessiblemem: write) }

!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)"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass