; LLVM IR from JonathanSalwan/Triton :: src/stubs (triton-stubs)

; 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: 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
define dso_local ptr @memrchr(ptr noundef %0, i32 noundef %1, i64 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %10 = load ptr, ptr %5, align 8, !tbaa !5
  %11 = load i64, ptr %7, align 8, !tbaa !11
  %12 = getelementptr inbounds i8, ptr %10, i64 %11
  store ptr %12, ptr %8, align 8, !tbaa !5
  br label %13

13:                                               ; preds = %27, %3
  %14 = load i64, ptr %7, align 8, !tbaa !11
  %15 = icmp ne i64 %14, 0
  br i1 %15, label %16, label %30

16:                                               ; preds = %13
  %17 = load ptr, ptr %8, align 8, !tbaa !5
  %18 = getelementptr inbounds i8, ptr %17, i32 -1
  store ptr %18, ptr %8, align 8, !tbaa !5
  %19 = load i8, ptr %18, align 1, !tbaa !13
  %20 = zext i8 %19 to i32
  %21 = load i32, ptr %6, align 4, !tbaa !9
  %22 = trunc i32 %21 to i8
  %23 = zext i8 %22 to i32
  %24 = icmp eq i32 %20, %23
  br i1 %24, label %25, label %27

25:                                               ; preds = %16
  %26 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %26, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %31

27:                                               ; preds = %16
  %28 = load i64, ptr %7, align 8, !tbaa !11
  %29 = add i64 %28, -1
  store i64 %29, ptr %7, align 8, !tbaa !11
  br label %13, !llvm.loop !14

30:                                               ; preds = %13
  store ptr null, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %31

31:                                               ; preds = %30, %25
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %32 = load ptr, ptr %4, align 8
  ret ptr %32
}

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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!7, !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local noundef ptr @memrchr(ptr noundef readonly %0, i32 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not9 = icmp eq i64 %2, 0
  br i1 %.not9, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3
  %4 = getelementptr inbounds i8, ptr %0, i64 %2
  %5 = trunc i32 %1 to i8
  br label %8

6:                                                ; preds = %8
  %7 = add i64 %.0710, -1
  %.not = icmp eq i64 %7, 0
  br i1 %.not, label %._crit_edge, label %8, !llvm.loop !5

8:                                                ; preds = %.lr.ph, %6
  %.011 = phi ptr [ %4, %.lr.ph ], [ %9, %6 ]
  %.0710 = phi i64 [ %2, %.lr.ph ], [ %7, %6 ]
  %9 = getelementptr inbounds i8, ptr %.011, i64 -1
  %10 = load i8, ptr %9, align 1, !tbaa !7
  %11 = icmp eq i8 %10, %5
  br i1 %11, label %._crit_edge, label %6

._crit_edge:                                      ; preds = %8, %6, %3
  %.08 = phi ptr [ null, %3 ], [ null, %6 ], [ %9, %8 ]
  ret ptr %.08
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass