; LLVM IR from thalium/icebox :: third_party/libdwarf-20191104/dwarfdump (dwarf_names)

; 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.744 = external hidden unnamed_addr constant [21 x i8], align 1
@.str.745 = external hidden unnamed_addr constant [14 x i8], align 1
@.str.746 = external hidden unnamed_addr constant [16 x i8], align 1
@.str.747 = external hidden unnamed_addr constant [23 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @dwarf_get_ID_name(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  %6 = load i32, ptr %4, align 4, !tbaa !5
  switch i32 %6, label %15 [
    i32 0, label %7
    i32 1, label %9
    i32 2, label %11
    i32 3, label %13
  ]

7:                                                ; preds = %2
  %8 = load ptr, ptr %5, align 8, !tbaa !9
  store ptr @.str.744, ptr %8, align 8, !tbaa !9
  store i32 0, ptr %3, align 4
  br label %16

9:                                                ; preds = %2
  %10 = load ptr, ptr %5, align 8, !tbaa !9
  store ptr @.str.745, ptr %10, align 8, !tbaa !9
  store i32 0, ptr %3, align 4
  br label %16

11:                                               ; preds = %2
  %12 = load ptr, ptr %5, align 8, !tbaa !9
  store ptr @.str.746, ptr %12, align 8, !tbaa !9
  store i32 0, ptr %3, align 4
  br label %16

13:                                               ; preds = %2
  %14 = load ptr, ptr %5, align 8, !tbaa !9
  store ptr @.str.747, ptr %14, align 8, !tbaa !9
  store i32 0, ptr %3, align 4
  br label %16

15:                                               ; preds = %2
  store i32 -1, ptr %3, align 4
  br label %16

16:                                               ; preds = %15, %13, %11, %9, %7
  %17 = load i32, ptr %3, align 4
  ret i32 %17
}

attributes #0 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !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.744 = external hidden unnamed_addr constant [21 x i8], align 1
@.str.745 = external hidden unnamed_addr constant [14 x i8], align 1
@.str.746 = external hidden unnamed_addr constant [16 x i8], align 1
@.str.747 = external hidden unnamed_addr constant [23 x i8], align 1
@switch.table.dwarf_get_ID_name = private unnamed_addr constant [4 x ptr] [ptr @.str.744, ptr @.str.745, ptr @.str.746, ptr @.str.747], align 8

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) uwtable
define dso_local range(i32 -1, 1) i32 @dwarf_get_ID_name(i32 noundef %0, ptr nocapture noundef writeonly %1) local_unnamed_addr #0 {
  %3 = icmp ult i32 %0, 4
  br i1 %3, label %switch.lookup, label %5

switch.lookup:                                    ; preds = %2
  %4 = zext nneg i32 %0 to i64
  %switch.gep = getelementptr inbounds [4 x ptr], ptr @switch.table.dwarf_get_ID_name, i64 0, i64 %4
  %switch.load = load ptr, ptr %switch.gep, align 8
  store ptr %switch.load, ptr %1, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %2, %switch.lookup
  %.0 = phi i32 [ -1, %2 ], [ 0, %switch.lookup ]
  ret i32 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) 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/C++ TBAA"}


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