; LLVM IR from HarshCasper/NeoAlgo :: C-Plus-Plus/stack/infixToPostfix.ll (Z4precc)

; 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 @_Z4precc(i8 noundef signext %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i8, align 1
  store i8 %0, ptr %3, align 1, !tbaa !5
  %4 = load i8, ptr %3, align 1, !tbaa !5
  %5 = sext i8 %4 to i32
  %6 = icmp eq i32 %5, 43
  br i1 %6, label %11, label %7

7:                                                ; preds = %1
  %8 = load i8, ptr %3, align 1, !tbaa !5
  %9 = sext i8 %8 to i32
  %10 = icmp eq i32 %9, 45
  br i1 %10, label %11, label %12

11:                                               ; preds = %7, %1
  store i32 1, ptr %2, align 4
  br label %23

12:                                               ; preds = %7
  %13 = load i8, ptr %3, align 1, !tbaa !5
  %14 = sext i8 %13 to i32
  %15 = icmp eq i32 %14, 42
  br i1 %15, label %20, label %16

16:                                               ; preds = %12
  %17 = load i8, ptr %3, align 1, !tbaa !5
  %18 = sext i8 %17 to i32
  %19 = icmp eq i32 %18, 47
  br i1 %19, label %20, label %21

20:                                               ; preds = %16, %12
  store i32 2, ptr %2, align 4
  br label %23

21:                                               ; preds = %16
  br label %22

22:                                               ; preds = %21
  unreachable

23:                                               ; preds = %20, %11
  %24 = load i32, ptr %2, align 4
  ret i32 %24
}

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"}


; 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 range(i32 1, 3) i32 @_Z4precc(i8 noundef signext %0) local_unnamed_addr #0 {
  switch i8 %0, label %2 [
    i8 45, label %5
    i8 43, label %5
  ]

2:                                                ; preds = %1
  %3 = icmp eq i8 %0, 42
  %4 = icmp eq i8 %0, 47
  %or.cond5 = or i1 %3, %4
  tail call void @llvm.assume(i1 %or.cond5)
  br label %5

5:                                                ; preds = %1, %1, %2
  %.0 = phi i32 [ 2, %2 ], [ 1, %1 ], [ 1, %1 ]
  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,IPSCCPPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass