; LLVM IR from thepowersgang/mrustc :: src/hir/hir.ll (ZN3HIRlsERSoRKNS_6Struct4ReprE)

; 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"

@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.20 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.21 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.22 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.23 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.24 = external hidden unnamed_addr constant [12 x i8], align 1

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN3HIRlsERSoRKNS_6Struct4ReprE(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef nonnull align 4 dereferenceable(4) %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef @.str.20)
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  %8 = load i32, ptr %7, align 4, !tbaa !9
  switch i32 %8, label %21 [
    i32 0, label %9
    i32 1, label %12
    i32 2, label %15
    i32 3, label %18
  ]

9:                                                ; preds = %2
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %10, ptr noundef @.str.21)
  br label %21

12:                                               ; preds = %2
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %13, ptr noundef @.str.22)
  br label %21

15:                                               ; preds = %2
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %16, ptr noundef @.str.23)
  br label %21

18:                                               ; preds = %2
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %19, ptr noundef @.str.24)
  br label %21

21:                                               ; preds = %18, %15, %12, %9, %2
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %22, ptr noundef @.str.3)
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  ret ptr %24
}

attributes #0 = { inlinehint 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" }
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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"_ZTSN3HIR6Struct4ReprE", !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"

@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.20 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.21 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.22 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.23 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.24 = external hidden unnamed_addr constant [12 x i8], align 1
@switch.table._ZN3HIRlsERSoRKNS_6Struct4ReprE = private unnamed_addr constant [4 x ptr] [ptr @.str.21, ptr @.str.22, ptr @.str.23, ptr @.str.24], align 8

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN3HIRlsERSoRKNS_6Struct4ReprE(ptr noundef nonnull returned align 8 dereferenceable(8) %0, ptr nocapture noundef nonnull readonly align 4 dereferenceable(4) %1) local_unnamed_addr #1 {
  %3 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef nonnull @.str.20)
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = icmp ult i32 %4, 4
  br i1 %5, label %switch.lookup, label %8

switch.lookup:                                    ; preds = %2
  %6 = zext nneg i32 %4 to i64
  %switch.gep = getelementptr inbounds [4 x ptr], ptr @switch.table._ZN3HIRlsERSoRKNS_6Struct4ReprE, i64 0, i64 %6
  %switch.load = load ptr, ptr %switch.gep, align 8
  %7 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef nonnull %switch.load)
  br label %8

8:                                                ; preds = %2, %switch.lookup
  %9 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef nonnull @.str.3)
  ret ptr %0
}

attributes #0 = { inlinehint 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" }
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 = !{!"_ZTSN3HIR6Struct4ReprE", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass