; LLVM IR from bytecodealliance/sightglass :: benchmarks/shootout/src (gimli)

; 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"

@black_box = external hidden global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca [12 x i32], align 16
  %3 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 48, ptr %2) #4
  call void @llvm.memset.p0.i64(ptr align 16 %2, i8 0, i64 48, i1 false)
  %4 = load volatile ptr, ptr @black_box, align 8, !tbaa !5
  call void %4(ptr noundef %2)
  call void (...) @bench_start()
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %5

5:                                                ; preds = %10, %0
  %6 = load i32, ptr %3, align 4, !tbaa !9
  %7 = icmp slt i32 %6, 10000
  br i1 %7, label %8, label %13

8:                                                ; preds = %5
  %9 = getelementptr inbounds [12 x i32], ptr %2, i64 0, i64 0
  call void @gimli_core(ptr noundef %9)
  br label %10

10:                                               ; preds = %8
  %11 = load i32, ptr %3, align 4, !tbaa !9
  %12 = add nsw i32 %11, 1
  store i32 %12, ptr %3, align 4, !tbaa !9
  br label %5, !llvm.loop !11

13:                                               ; preds = %5
  call void (...) @bench_end()
  %14 = load volatile ptr, ptr @black_box, align 8, !tbaa !5
  %15 = getelementptr inbounds [12 x i32], ptr %2, i64 0, i64 0
  call void %14(ptr noundef %15)
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 48, ptr %2) #4
  %16 = load i32, ptr %1, align 4
  ret i32 %16
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

declare void @bench_start(...) #3

; Function Attrs: nounwind uwtable
declare hidden void @gimli_core(ptr noundef) #0

declare void @bench_end(...) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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 willreturn memory(argmem: readwrite) }
attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { "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 #4 = { 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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; 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"

@black_box = external hidden global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca [12 x i32], align 16
  call void @llvm.lifetime.start.p0(i64 48, ptr nonnull %1) #4
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(48) %1, i8 0, i64 48, i1 false)
  %2 = load volatile ptr, ptr @black_box, align 8, !tbaa !5
  call void %2(ptr noundef nonnull %1) #4
  call void (...) @bench_start() #4
  br label %3

3:                                                ; preds = %0, %3
  %.03 = phi i32 [ 0, %0 ], [ %4, %3 ]
  call void @gimli_core(ptr noundef nonnull %1)
  %4 = add nuw nsw i32 %.03, 1
  %exitcond.not = icmp eq i32 %4, 10000
  br i1 %exitcond.not, label %5, label %3, !llvm.loop !9

5:                                                ; preds = %3
  call void (...) @bench_end() #4
  %6 = load volatile ptr, ptr @black_box, align 8, !tbaa !5
  call void %6(ptr noundef nonnull %1) #4
  call void @llvm.lifetime.end.p0(i64 48, ptr nonnull %1) #4
  ret i32 0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

declare void @bench_start(...) local_unnamed_addr #3

; Function Attrs: nounwind uwtable
declare hidden void @gimli_core(ptr noundef) local_unnamed_addr #0

declare void @bench_end(...) local_unnamed_addr #3

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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 willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { "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 #4 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass