; LLVM IR from upupming/algorithm :: AdvancedLevel_C++/1039. Course List for Student (25).ll (Z5getidPc)

; 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 @_Z5getidPc(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %5

5:                                                ; preds = %20, %1
  %6 = load i32, ptr %4, align 4, !tbaa !9
  %7 = icmp slt i32 %6, 3
  br i1 %7, label %9, label %8

8:                                                ; preds = %5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %23

9:                                                ; preds = %5
  %10 = load i32, ptr %3, align 4, !tbaa !9
  %11 = mul nsw i32 26, %10
  %12 = load ptr, ptr %2, align 8, !tbaa !5
  %13 = load i32, ptr %4, align 4, !tbaa !9
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds i8, ptr %12, i64 %14
  %16 = load i8, ptr %15, align 1, !tbaa !11
  %17 = sext i8 %16 to i32
  %18 = sub nsw i32 %17, 65
  %19 = add nsw i32 %11, %18
  store i32 %19, ptr %3, align 4, !tbaa !9
  br label %20

20:                                               ; preds = %9
  %21 = load i32, ptr %4, align 4, !tbaa !9
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %4, align 4, !tbaa !9
  br label %5, !llvm.loop !12

23:                                               ; preds = %8
  %24 = load i32, ptr %3, align 4, !tbaa !9
  %25 = mul nsw i32 %24, 10
  %26 = load ptr, ptr %2, align 8, !tbaa !5
  %27 = getelementptr inbounds i8, ptr %26, i64 3
  %28 = load i8, ptr %27, align 1, !tbaa !11
  %29 = sext i8 %28 to i32
  %30 = sub nsw i32 %29, 48
  %31 = add nsw i32 %25, %30
  store i32 %31, ptr %3, align 4, !tbaa !9
  %32 = load i32, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %32
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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++ 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: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef i32 @_Z5getidPc(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = load i8, ptr %0, align 1, !tbaa !5
  %3 = sext i8 %2 to i32
  %4 = mul nsw i32 %3, 26
  %5 = getelementptr inbounds i8, ptr %0, i64 1
  %6 = load i8, ptr %5, align 1, !tbaa !5
  %7 = sext i8 %6 to i32
  %8 = add nsw i32 %4, -1755
  %9 = add nsw i32 %8, %7
  %10 = mul nsw i32 %9, 26
  %11 = getelementptr inbounds i8, ptr %0, i64 2
  %12 = load i8, ptr %11, align 1, !tbaa !5
  %13 = sext i8 %12 to i32
  %14 = add nsw i32 %10, -65
  %15 = add nsw i32 %14, %13
  %16 = mul nsw i32 %15, 10
  %17 = getelementptr inbounds i8, ptr %0, i64 3
  %18 = load i8, ptr %17, align 1, !tbaa !5
  %19 = sext i8 %18 to i32
  %20 = add nsw i32 %16, -48
  %21 = add nsw i32 %20, %19
  ret i32 %21
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn 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++ TBAA"}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,LoopRotatePass,PostOrderFunctionAttrsPass,ReassociatePass,SCCPPass,SROAPass,SimplifyCFGPass