; LLVM IR from tangjz/acm-icpc :: Summer_Training/2016-07-19/F - PowMod - tjz.ll (Z4calcii)

; 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"

@phi = external dso_local global [10000001 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z7mod_powiii(i32 noundef, i32 noundef, i32 noundef) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z4calcii(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %6 = icmp eq i32 %5, 1
  br i1 %6, label %7, label %8

7:                                                ; preds = %2
  br label %23

8:                                                ; preds = %2
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [10000001 x i32], ptr @phi, i64 0, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = call noundef i32 @_Z4calcii(i32 noundef %10, i32 noundef %14)
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [10000001 x i32], ptr @phi, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = add nsw i32 %15, %19
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = call noundef i32 @_Z7mod_powiii(i32 noundef %9, i32 noundef %20, i32 noundef %21)
  br label %23

23:                                               ; preds = %8, %7
  %24 = phi i32 [ 0, %7 ], [ %22, %8 ]
  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" }
attributes #1 = { mustprogress 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"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"

@phi = external dso_local local_unnamed_addr global [10000001 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z7mod_powiii(i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z4calcii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i32 %1, 1
  br i1 %3, label %common.ret6, label %4

common.ret6:                                      ; preds = %2, %4
  %common.ret6.op = phi i32 [ %11, %4 ], [ 0, %2 ]
  ret i32 %common.ret6.op

4:                                                ; preds = %2
  %5 = sext i32 %1 to i64
  %6 = getelementptr inbounds [10000001 x i32], ptr @phi, i64 0, i64 %5
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %8 = tail call noundef i32 @_Z4calcii(i32 noundef %0, i32 noundef %7)
  %9 = load i32, ptr %6, align 4, !tbaa !5
  %10 = add nsw i32 %9, %8
  %11 = tail call noundef i32 @_Z7mod_powiii(i32 noundef %0, i32 noundef %10, i32 noundef %1)
  br label %common.ret6
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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