; LLVM IR from sysprog21/shecc :: src (ssa)

; 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"

%struct.alias_t = type { [32 x i8], [32 x i8], i8 }

@ALIASES_MAP = external dso_local global ptr, align 8

; 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
declare dso_local ptr @hashmap_get(ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @remove_alias(ptr noundef %0) #1 {
  %2 = alloca i1, align 1
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %6 = load ptr, ptr @ALIASES_MAP, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = call ptr @hashmap_get(ptr noundef %6, ptr noundef %7)
  store ptr %8, ptr %4, align 8, !tbaa !5
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = icmp ne ptr %9, null
  br i1 %10, label %11, label %19

11:                                               ; preds = %1
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.alias_t, ptr %12, i32 0, i32 2
  %14 = load i8, ptr %13, align 1, !tbaa !9, !range !12, !noundef !13
  %15 = trunc i8 %14 to i1
  br i1 %15, label %19, label %16

16:                                               ; preds = %11
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.alias_t, ptr %17, i32 0, i32 2
  store i8 1, ptr %18, align 1, !tbaa !9
  store i1 true, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %20

19:                                               ; preds = %11, %1
  store i1 false, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %20

20:                                               ; preds = %19, %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %21 = load i1, ptr %2, align 1
  ret i1 %21
}

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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !11, i64 64}
!10 = !{!"", !7, i64 0, !7, i64 32, !11, i64 64}
!11 = !{!"_Bool", !7, i64 0}
!12 = !{i8 0, i8 2}
!13 = !{}


; 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"

@ALIASES_MAP = external dso_local local_unnamed_addr global ptr, align 8

; Function Attrs: nounwind uwtable
declare dso_local ptr @hashmap_get(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef zeroext i1 @remove_alias(ptr noundef %0) local_unnamed_addr #0 {
  %2 = load ptr, ptr @ALIASES_MAP, align 8, !tbaa !5
  %3 = tail call ptr @hashmap_get(ptr noundef %2, ptr noundef %0)
  %.not = icmp eq ptr %3, null
  br i1 %.not, label %9, label %4

4:                                                ; preds = %1
  %5 = getelementptr inbounds i8, ptr %3, i64 64
  %6 = load i8, ptr %5, align 1, !tbaa !9, !range !12, !noundef !13
  %7 = trunc nuw i8 %6 to i1
  br i1 %7, label %9, label %8

8:                                                ; preds = %4
  store i8 1, ptr %5, align 1, !tbaa !9
  br label %9

9:                                                ; preds = %1, %4, %8
  %.0 = phi i1 [ true, %8 ], [ false, %4 ], [ false, %1 ]
  ret i1 %.0
}

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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !11, i64 64}
!10 = !{!"", !7, i64 0, !7, i64 32, !11, i64 64}
!11 = !{!"_Bool", !7, i64 0}
!12 = !{i8 0, i8 2}
!13 = !{}


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