; LLVM IR from jingweizhanghuai/Morn :: src/ptc (morn_thread)

; 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"

@mThreadID.ID = external hidden thread_local global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local i32 @mThreadID() #0 {
  %1 = call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @mThreadID.ID)
  %2 = load i32, ptr %1, align 4, !tbaa !5
  %3 = icmp eq i32 %2, 0
  br i1 %3, label %4, label %8

4:                                                ; preds = %0
  %5 = call i64 (i64, ...) @syscall(i64 noundef 186) #3
  %6 = trunc i64 %5 to i32
  %7 = call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @mThreadID.ID)
  store i32 %6, ptr %7, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %4, %0
  %9 = call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @mThreadID.ID)
  %10 = load i32, ptr %9, align 4, !tbaa !5
  ret i32 %10
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare nonnull ptr @llvm.threadlocal.address.p0(ptr nonnull) #1

; Function Attrs: nounwind
declare i64 @syscall(i64 noundef, ...) #2

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" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { nounwind "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 #3 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/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"

@mThreadID.ID = external hidden thread_local local_unnamed_addr global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local i32 @mThreadID() local_unnamed_addr #0 {
  %1 = tail call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @mThreadID.ID)
  %2 = load i32, ptr %1, align 4, !tbaa !5
  %3 = icmp eq i32 %2, 0
  br i1 %3, label %4, label %7

4:                                                ; preds = %0
  %5 = tail call i64 (i64, ...) @syscall(i64 noundef 186) #3
  %6 = trunc i64 %5 to i32
  store i32 %6, ptr %1, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %4, %0
  %8 = phi i32 [ %6, %4 ], [ %2, %0 ]
  ret i32 %8
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare nonnull ptr @llvm.threadlocal.address.p0(ptr nonnull) #1

; Function Attrs: nounwind
declare i64 @syscall(i64 noundef, ...) local_unnamed_addr #2

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" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { nounwind "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 #3 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,TailCallElimPass