; LLVM IR from aap/pdp6 :: tools (as6)

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local i64 @shift(i64 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %8 = load i32, ptr %5, align 4, !tbaa !9
  %9 = icmp slt i32 %8, 0
  %10 = zext i1 %9 to i32
  store i32 %10, ptr %6, align 4, !tbaa !9
  %11 = load i32, ptr %6, align 4, !tbaa !9
  %12 = icmp ne i32 %11, 0
  br i1 %12, label %13, label %16

13:                                               ; preds = %2
  %14 = load i32, ptr %5, align 4, !tbaa !9
  %15 = sub nsw i32 0, %14
  store i32 %15, ptr %5, align 4, !tbaa !9
  br label %16

16:                                               ; preds = %13, %2
  %17 = load i32, ptr %5, align 4, !tbaa !9
  %18 = icmp sgt i32 %17, 64
  br i1 %18, label %19, label %20

19:                                               ; preds = %16
  store i64 0, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %33

20:                                               ; preds = %16
  %21 = load i32, ptr %6, align 4, !tbaa !9
  %22 = icmp ne i32 %21, 0
  br i1 %22, label %23, label %28

23:                                               ; preds = %20
  %24 = load i64, ptr %4, align 8, !tbaa !5
  %25 = load i32, ptr %5, align 4, !tbaa !9
  %26 = zext i32 %25 to i64
  %27 = shl i64 %24, %26
  store i64 %27, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %33

28:                                               ; preds = %20
  %29 = load i64, ptr %4, align 8, !tbaa !5
  %30 = load i32, ptr %5, align 4, !tbaa !9
  %31 = zext i32 %30 to i64
  %32 = lshr i64 %29, %31
  store i64 %32, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %33

33:                                               ; preds = %28, %23, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %34 = load i64, ptr %3, align 8
  ret i64 %34
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, 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(none) uwtable
define dso_local i64 @shift(i64 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp slt i32 %1, 0
  %4 = sub nsw i32 0, %1
  %spec.select = select i1 %3, i32 %4, i32 %1
  %5 = icmp sgt i32 %spec.select, 64
  br i1 %5, label %13, label %6

6:                                                ; preds = %2
  br i1 %3, label %7, label %10

7:                                                ; preds = %6
  %8 = zext nneg i32 %4 to i64
  %9 = shl i64 %0, %8
  br label %13

10:                                               ; preds = %6
  %11 = zext nneg i32 %1 to i64
  %12 = lshr i64 %0, %11
  br label %13

13:                                               ; preds = %2, %10, %7
  %.0 = phi i64 [ %9, %7 ], [ %12, %10 ], [ 0, %2 ]
  ret i64 %.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: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass