; LLVM IR from ShahjalalShohag/code-library :: Miscellaneous/Expression Parsing.ll (Z8priorityc)

; 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 @_Z8priorityc(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 slt i32 %5, 0
  br i1 %6, label %7, label %8

7:                                                ; preds = %1
  store i32 3, ptr %2, align 4
  br label %27

8:                                                ; preds = %1
  %9 = load i8, ptr %3, align 1, !tbaa !5
  %10 = sext i8 %9 to i32
  %11 = icmp eq i32 %10, 43
  br i1 %11, label %16, label %12

12:                                               ; preds = %8
  %13 = load i8, ptr %3, align 1, !tbaa !5
  %14 = sext i8 %13 to i32
  %15 = icmp eq i32 %14, 45
  br i1 %15, label %16, label %17

16:                                               ; preds = %12, %8
  store i32 1, ptr %2, align 4
  br label %27

17:                                               ; preds = %12
  %18 = load i8, ptr %3, align 1, !tbaa !5
  %19 = sext i8 %18 to i32
  %20 = icmp eq i32 %19, 42
  br i1 %20, label %25, label %21

21:                                               ; preds = %17
  %22 = load i8, ptr %3, align 1, !tbaa !5
  %23 = sext i8 %22 to i32
  %24 = icmp eq i32 %23, 47
  br i1 %24, label %25, label %26

25:                                               ; preds = %21, %17
  store i32 2, ptr %2, align 4
  br label %27

26:                                               ; preds = %21
  store i32 -1, ptr %2, align 4
  br label %27

27:                                               ; preds = %26, %25, %16, %7
  %28 = load i32, ptr %2, align 4
  ret i32 %28
}

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"

@switch.table._Z8priorityc = private unnamed_addr constant [6 x i32] [i32 2, i32 1, i32 -1, i32 1, i32 -1, i32 2], align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef range(i32 -1, 4) i32 @_Z8priorityc(i8 noundef signext %0) local_unnamed_addr #0 {
  %2 = icmp slt i8 %0, 0
  br i1 %2, label %6, label %3

3:                                                ; preds = %1
  %switch.tableidx = add nsw i8 %0, -42
  %4 = icmp ult i8 %switch.tableidx, 6
  br i1 %4, label %switch.lookup, label %6

switch.lookup:                                    ; preds = %3
  %5 = zext nneg i8 %switch.tableidx to i64
  %switch.gep = getelementptr inbounds [6 x i32], ptr @switch.table._Z8priorityc, i64 0, i64 %5
  %switch.load = load i32, ptr %switch.gep, align 4
  br label %6

6:                                                ; preds = %3, %switch.lookup, %1
  %.0 = phi i32 [ 3, %1 ], [ %switch.load, %switch.lookup ], [ -1, %3 ]
  ret i32 %.0
}

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


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