; LLVM IR from jspd-group/pegit :: src (commit)

; 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"

%struct.commit_list = type { i64, ptr, ptr }
%struct.commit = type { i16, [20 x i8], [50 x i8], [41 x i8], ptr, %struct.strbuf, %struct.strbuf, %struct.timestamp, i64, i64 }
%struct.strbuf = type { i64, i64, ptr }
%struct.timestamp = type { i64, ptr }

; 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 @get_head_commit(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %6, ptr %4, align 8, !tbaa !5
  br label %7

7:                                                ; preds = %23, %1
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = icmp ne ptr %8, null
  br i1 %9, label %10, label %27

10:                                               ; preds = %7
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.commit_list, ptr %11, i32 0, i32 1
  %13 = load ptr, ptr %12, align 8, !tbaa !9
  %14 = getelementptr inbounds %struct.commit, ptr %13, i32 0, i32 0
  %15 = load i16, ptr %14, align 8, !tbaa !12
  %16 = sext i16 %15 to i32
  %17 = and i32 %16, 22
  %18 = icmp ne i32 %17, 0
  br i1 %18, label %19, label %23

19:                                               ; preds = %10
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.commit_list, ptr %20, i32 0, i32 1
  %22 = load ptr, ptr %21, align 8, !tbaa !9
  store ptr %22, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %28

23:                                               ; preds = %10
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.commit_list, ptr %24, i32 0, i32 2
  %26 = load ptr, ptr %25, align 8, !tbaa !17
  store ptr %26, ptr %4, align 8, !tbaa !5
  br label %7, !llvm.loop !18

27:                                               ; preds = %7
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %28

28:                                               ; preds = %27, %19
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %29 = load ptr, ptr %2, align 8
  ret ptr %29
}

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, !6, i64 8}
!10 = !{!"commit_list", !11, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!"long", !7, i64 0}
!12 = !{!13, !14, i64 0}
!13 = !{!"commit", !14, i64 0, !7, i64 2, !7, i64 22, !7, i64 72, !6, i64 120, !15, i64 128, !15, i64 152, !16, i64 176, !11, i64 192, !11, i64 200}
!14 = !{!"short", !7, i64 0}
!15 = !{!"strbuf", !11, i64 0, !11, i64 8, !6, i64 16}
!16 = !{!"timestamp", !11, i64 0, !6, i64 8}
!17 = !{!10, !6, i64 16}
!18 = distinct !{!18, !19}
!19 = !{!"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 @get_head_commit(ptr noundef readonly %0) local_unnamed_addr #0 {
  %.not8 = icmp eq ptr %0, null
  br i1 %.not8, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %6
  %.09 = phi ptr [ %8, %6 ], [ %0, %1 ]
  %2 = getelementptr inbounds i8, ptr %.09, i64 8
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = load i16, ptr %3, align 8, !tbaa !11
  %5 = and i16 %4, 22
  %.not7 = icmp eq i16 %5, 0
  br i1 %.not7, label %6, label %._crit_edge

6:                                                ; preds = %.lr.ph
  %7 = getelementptr inbounds i8, ptr %.09, i64 16
  %8 = load ptr, ptr %7, align 8, !tbaa !16
  %.not = icmp eq ptr %8, null
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !17

._crit_edge:                                      ; preds = %.lr.ph, %6, %1
  %.06 = phi ptr [ null, %1 ], [ null, %6 ], [ %3, %.lr.ph ]
  ret ptr %.06
}

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, !10, i64 8}
!6 = !{!"commit_list", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!12, !13, i64 0}
!12 = !{!"commit", !13, i64 0, !8, i64 2, !8, i64 22, !8, i64 72, !10, i64 120, !14, i64 128, !14, i64 152, !15, i64 176, !7, i64 192, !7, i64 200}
!13 = !{!"short", !8, i64 0}
!14 = !{!"strbuf", !7, i64 0, !7, i64 8, !10, i64 16}
!15 = !{!"timestamp", !7, i64 0, !10, i64 8}
!16 = !{!6, !10, i64 16}
!17 = distinct !{!17, !18}
!18 = !{!"llvm.loop.mustprogress"}


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