; LLVM IR from joembedded/JesFs :: jesfs_hl (fs_strcmp)

; 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
define dso_local signext i16 @fs_strcmp(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %27, %2
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = load i8, ptr %6, align 1, !tbaa !9
  %8 = sext i8 %7 to i32
  %9 = icmp eq i32 %8, 0
  br i1 %9, label %18, label %10

10:                                               ; preds = %5
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = load i8, ptr %11, align 1, !tbaa !9
  %13 = sext i8 %12 to i32
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = load i8, ptr %14, align 1, !tbaa !9
  %16 = sext i8 %15 to i32
  %17 = icmp ne i32 %13, %16
  br i1 %17, label %18, label %27

18:                                               ; preds = %10, %5
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = load i8, ptr %19, align 1, !tbaa !9
  %21 = sext i8 %20 to i32
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = load i8, ptr %22, align 1, !tbaa !9
  %24 = sext i8 %23 to i32
  %25 = sub nsw i32 %21, %24
  %26 = trunc i32 %25 to i16
  ret i16 %26

27:                                               ; preds = %10
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = getelementptr inbounds i8, ptr %28, i32 1
  store ptr %29, ptr %3, align 8, !tbaa !5
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = getelementptr inbounds i8, ptr %30, i32 1
  store ptr %31, ptr %4, align 8, !tbaa !5
  br label %5
}

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 = !{!7, !7, i64 0}


; 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 signext range(i16 -255, 256) i16 @fs_strcmp(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = load i8, ptr %0, align 1, !tbaa !5
  %4 = icmp eq i8 %3, 0
  br i1 %4, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %11
  %5 = phi i8 [ %14, %11 ], [ %3, %2 ]
  %.010 = phi ptr [ %13, %11 ], [ %1, %2 ]
  %.079 = phi ptr [ %12, %11 ], [ %0, %2 ]
  %6 = load i8, ptr %.010, align 1, !tbaa !5
  %.not = icmp eq i8 %5, %6
  br i1 %.not, label %11, label %._crit_edge.loopexit

._crit_edge.loopexit:                             ; preds = %.lr.ph, %11
  %.0.lcssa.ph = phi ptr [ %13, %11 ], [ %.010, %.lr.ph ]
  %.lcssa.ph = phi i8 [ 0, %11 ], [ %5, %.lr.ph ]
  %7 = sext i8 %.lcssa.ph to i16
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %2
  %.0.lcssa = phi ptr [ %1, %2 ], [ %.0.lcssa.ph, %._crit_edge.loopexit ]
  %.lcssa = phi i16 [ 0, %2 ], [ %7, %._crit_edge.loopexit ]
  %8 = load i8, ptr %.0.lcssa, align 1, !tbaa !5
  %9 = sext i8 %8 to i16
  %10 = sub nsw i16 %.lcssa, %9
  ret i16 %10

11:                                               ; preds = %.lr.ph
  %12 = getelementptr inbounds i8, ptr %.079, i64 1
  %13 = getelementptr inbounds i8, ptr %.010, i64 1
  %14 = load i8, ptr %12, align 1, !tbaa !5
  %15 = icmp eq i8 %14, 0
  br i1 %15, label %._crit_edge.loopexit, label %.lr.ph
}

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 = !{!6, !6, i64 0}
!6 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InstCombinePass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass