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

; 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.peg_env = type { i32, ptr, ptr, ptr, %struct.strbuf, ptr, i8 }
%struct.strbuf = type { i64, i64, ptr }
%struct.config_list = type { %struct.strbuf, %struct.strbuf, 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_environment_value(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.peg_env, ptr %8, i32 0, i32 3
  %10 = load ptr, ptr %9, align 8, !tbaa !9
  store ptr %10, ptr %6, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %24, %2
  %12 = load ptr, ptr %6, align 8, !tbaa !5
  %13 = icmp ne ptr %12, null
  br i1 %13, label %14, label %28

14:                                               ; preds = %11
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.config_list, ptr %16, i32 0, i32 0
  %18 = getelementptr inbounds %struct.strbuf, ptr %17, i32 0, i32 2
  %19 = load ptr, ptr %18, align 8, !tbaa !15
  %20 = call i32 @strcmp(ptr noundef %15, ptr noundef %19) #4
  %21 = icmp ne i32 %20, 0
  br i1 %21, label %24, label %22

22:                                               ; preds = %14
  %23 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %23, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %29

24:                                               ; preds = %14
  %25 = load ptr, ptr %6, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.config_list, ptr %25, i32 0, i32 3
  %27 = load ptr, ptr %26, align 8, !tbaa !17
  store ptr %27, ptr %6, align 8, !tbaa !5
  br label %11, !llvm.loop !18

28:                                               ; preds = %11
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %29

29:                                               ; preds = %28, %22
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %30 = load ptr, ptr %3, align 8
  ret ptr %30
}

; Function Attrs: nounwind willreturn memory(read)
declare i32 @strcmp(ptr noundef, ptr noundef) #2

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 willreturn memory(read) "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 }
attributes #4 = { nounwind willreturn memory(read) }

!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 24}
!10 = !{!"peg_env", !11, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !12, i64 32, !6, i64 56, !14, i64 64}
!11 = !{!"int", !7, i64 0}
!12 = !{!"strbuf", !13, i64 0, !13, i64 8, !6, i64 16}
!13 = !{!"long", !7, i64 0}
!14 = !{!"_Bool", !7, i64 0}
!15 = !{!16, !6, i64 16}
!16 = !{!"config_list", !12, i64 0, !12, i64 24, !13, i64 48, !6, i64 56}
!17 = !{!16, !6, i64 56}
!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 nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local ptr @get_environment_value(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 24
  %.09 = load ptr, ptr %3, align 8, !tbaa !5
  %.not10 = icmp eq ptr %.09, null
  br i1 %.not10, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %7
  %.011 = phi ptr [ %.0, %7 ], [ %.09, %2 ]
  %4 = getelementptr inbounds i8, ptr %.011, i64 16
  %5 = load ptr, ptr %4, align 8, !tbaa !9
  %6 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %1, ptr noundef nonnull dereferenceable(1) %5) #2
  %.not8 = icmp eq i32 %6, 0
  br i1 %.not8, label %._crit_edge, label %7

7:                                                ; preds = %.lr.ph
  %8 = getelementptr inbounds i8, ptr %.011, i64 56
  %.0 = load ptr, ptr %8, align 8, !tbaa !5
  %.not = icmp eq ptr %.0, null
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %7, %2
  %.0.lcssa = phi ptr [ null, %2 ], [ null, %7 ], [ %.011, %.lr.ph ]
  ret ptr %.0.lcssa
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i32 @strcmp(ptr nocapture noundef, ptr nocapture noundef) local_unnamed_addr #1

attributes #0 = { nofree 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" }
attributes #1 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 willreturn memory(read) }

!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 16}
!10 = !{!"config_list", !11, i64 0, !11, i64 24, !12, i64 48, !6, i64 56}
!11 = !{!"strbuf", !12, i64 0, !12, i64 8, !6, i64 16}
!12 = !{!"long", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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