; LLVM IR from libxsmm/libxsmm :: samples/encoder (encoder_x86)

; 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"

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

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

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

; Function Attrs: nounwind uwtable
define dso_local void @test_alu_stack(ptr noundef %0, ptr noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %8 = load ptr, ptr %5, align 8, !tbaa !5
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  call void @reset_code_buffer(ptr noundef %8, ptr noundef %9)
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %23, %3
  %11 = load i32, ptr %7, align 4, !tbaa !9
  %12 = icmp ult i32 %11, 16
  br i1 %12, label %13, label %26

13:                                               ; preds = %10
  %14 = load i32, ptr %6, align 4, !tbaa !9
  %15 = icmp ne i32 %14, 0
  br i1 %15, label %16, label %19

16:                                               ; preds = %13
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = load i32, ptr %7, align 4, !tbaa !9
  call void @libxsmm_x86_instruction_pop_reg(ptr noundef %17, i32 noundef %18)
  br label %22

19:                                               ; preds = %13
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = load i32, ptr %7, align 4, !tbaa !9
  call void @libxsmm_x86_instruction_push_reg(ptr noundef %20, i32 noundef %21)
  br label %22

22:                                               ; preds = %19, %16
  br label %23

23:                                               ; preds = %22
  %24 = load i32, ptr %7, align 4, !tbaa !9
  %25 = add i32 %24, 1
  store i32 %25, ptr %7, align 4, !tbaa !9
  br label %10, !llvm.loop !11

26:                                               ; preds = %10
  %27 = load ptr, ptr %5, align 8, !tbaa !5
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  call void @dump_code_buffer(ptr noundef %27, ptr noundef %28)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  ret void
}

declare void @libxsmm_x86_instruction_pop_reg(ptr noundef, i32 noundef) #2

declare void @libxsmm_x86_instruction_push_reg(ptr noundef, i32 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 willreturn memory(argmem: readwrite) }
attributes #2 = { "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 = !{!"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"

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

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

; Function Attrs: nounwind uwtable
define dso_local void @test_alu_stack(ptr noundef %0, ptr noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  tail call void @reset_code_buffer(ptr noundef %1, ptr noundef %0)
  %.not = icmp eq i32 %2, 0
  br i1 %.not, label %.split.us.preheader, label %.split.preheader

.split.preheader:                                 ; preds = %3
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 0) #2
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 1) #2
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 2) #2
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 3) #2
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 4) #2
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 5) #2
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 6) #2
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 7) #2
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 8) #2
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 9) #2
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 10) #2
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 11) #2
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 12) #2
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 13) #2
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 14) #2
  tail call void @libxsmm_x86_instruction_pop_reg(ptr noundef %1, i32 noundef 15) #2
  br label %.split12.us

.split.us.preheader:                              ; preds = %3
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 0) #2
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 1) #2
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 2) #2
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 3) #2
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 4) #2
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 5) #2
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 6) #2
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 7) #2
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 8) #2
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 9) #2
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 10) #2
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 11) #2
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 12) #2
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 13) #2
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 14) #2
  tail call void @libxsmm_x86_instruction_push_reg(ptr noundef %1, i32 noundef 15) #2
  br label %.split12.us

.split12.us:                                      ; preds = %.split.preheader, %.split.us.preheader
  tail call void @dump_code_buffer(ptr noundef %1, ptr noundef %0)
  ret void
}

declare void @libxsmm_x86_instruction_pop_reg(ptr noundef, i32 noundef) local_unnamed_addr #1

declare void @libxsmm_x86_instruction_push_reg(ptr noundef, i32 noundef) local_unnamed_addr #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 = { "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)"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,SROAPass,SimplifyCFGPass,TailCallElimPass