; LLVM IR from JessonYue/LeetCodeLearning :: Array/luobiao/BaseDataStructure/ELFParse.ll (Z12get_elf_shdrP8_IO_FILE10Elf32_Ehdr)

; 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.Elf32_Ehdr = type { [16 x i8], i16, i16, i32, i32, i32, i32, i32, i16, i16, i16, i16, i16, i16 }

@.str.5 = external hidden unnamed_addr constant [21 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [20 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [18 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [19 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

declare i32 @printf(ptr noundef, ...) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_Z12get_elf_shdrP8_IO_FILE10Elf32_Ehdr(ptr noundef %0, ptr noundef byval(%struct.Elf32_Ehdr) align 8 %1) #2 {
  %3 = alloca ptr, align 8
  %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
  %8 = call i32 (ptr, ...) @printf(ptr noundef @.str.5)
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #6
  %9 = getelementptr inbounds %struct.Elf32_Ehdr, ptr %1, i32 0, i32 12
  %10 = load i16, ptr %9, align 8, !tbaa !9
  %11 = zext i16 %10 to i64
  %12 = mul i64 40, %11
  %13 = call noalias ptr @malloc(i64 noundef %12) #7
  store ptr %13, ptr %5, align 8, !tbaa !5
  %14 = call i32 (ptr, ...) @printf(ptr noundef @.str.5)
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = icmp eq ptr %15, null
  br i1 %16, label %17, label %19

17:                                               ; preds = %2
  %18 = call i32 (ptr, ...) @printf(ptr noundef @.str.6)
  br label %19

19:                                               ; preds = %17, %2
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  call void @llvm.memset.p0.i64(ptr align 4 %20, i8 0, i64 40, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #6
  store i32 0, ptr %6, align 4, !tbaa !13
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.Elf32_Ehdr, ptr %1, i32 0, i32 6
  %23 = load i32, ptr %22, align 8, !tbaa !14
  %24 = zext i32 %23 to i64
  %25 = call i32 @fseek(ptr noundef %21, i64 noundef %24, i32 noundef 0)
  store i32 %25, ptr %6, align 4, !tbaa !13
  %26 = load i32, ptr %6, align 4, !tbaa !13
  %27 = icmp ne i32 %26, 0
  br i1 %27, label %28, label %31

28:                                               ; preds = %19
  %29 = call i32 (ptr, ...) @printf(ptr noundef @.str.7)
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  call void @free(ptr noundef %30) #6
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %47

31:                                               ; preds = %19
  %32 = load ptr, ptr %5, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.Elf32_Ehdr, ptr %1, i32 0, i32 12
  %34 = load i16, ptr %33, align 8, !tbaa !9
  %35 = zext i16 %34 to i64
  %36 = load ptr, ptr %4, align 8, !tbaa !5
  %37 = call i64 @fread(ptr noundef %32, i64 noundef 40, i64 noundef %35, ptr noundef %36)
  %38 = trunc i64 %37 to i32
  store i32 %38, ptr %6, align 4, !tbaa !13
  %39 = load i32, ptr %6, align 4, !tbaa !13
  %40 = icmp eq i32 %39, 0
  br i1 %40, label %41, label %44

41:                                               ; preds = %31
  %42 = call i32 (ptr, ...) @printf(ptr noundef @.str.8)
  %43 = load ptr, ptr %5, align 8, !tbaa !5
  call void @free(ptr noundef %43) #6
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %47

44:                                               ; preds = %31
  %45 = call i32 (ptr, ...) @printf(ptr noundef @.str.9)
  %46 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %46, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %47

47:                                               ; preds = %44, %41, %28
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #6
  %48 = load ptr, ptr %3, align 8
  ret ptr %48
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #3

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

declare i32 @fseek(ptr noundef, i64 noundef, i32 noundef) #1

; Function Attrs: nounwind
declare void @free(ptr noundef) #5

declare i64 @fread(ptr noundef, i64 noundef, i64 noundef, ptr noundef) #1

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { mustprogress 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 #3 = { nounwind allocsize(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 #4 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #5 = { nounwind "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 #6 = { nounwind }
attributes #7 = { nounwind allocsize(0) }

!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++ TBAA"}
!9 = !{!10, !11, i64 48}
!10 = !{!"_ZTS10Elf32_Ehdr", !7, i64 0, !11, i64 16, !11, i64 18, !12, i64 20, !12, i64 24, !12, i64 28, !12, i64 32, !12, i64 36, !11, i64 40, !11, i64 42, !11, i64 44, !11, i64 46, !11, i64 48, !11, i64 50}
!11 = !{!"short", !7, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!12, !12, i64 0}
!14 = !{!10, !12, i64 32}


; 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"

%struct.Elf32_Ehdr = type { [16 x i8], i16, i16, i32, i32, i32, i32, i32, i16, i16, i16, i16, i16, i16 }

@.str.5 = external hidden unnamed_addr constant [21 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [20 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [18 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [19 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noalias noundef ptr @_Z12get_elf_shdrP8_IO_FILE10Elf32_Ehdr(ptr nocapture noundef %0, ptr nocapture noundef readonly byval(%struct.Elf32_Ehdr) align 8 %1) local_unnamed_addr #1 {
  %3 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5)
  %4 = getelementptr inbounds i8, ptr %1, i64 48
  %5 = load i16, ptr %4, align 8, !tbaa !5
  %6 = zext i16 %5 to i64
  %7 = mul nuw nsw i64 %6, 40
  %8 = tail call noalias ptr @malloc(i64 noundef %7) #5
  %9 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5)
  %10 = icmp eq ptr %8, null
  br i1 %10, label %11, label %13

11:                                               ; preds = %2
  %12 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6)
  br label %13

13:                                               ; preds = %11, %2
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 4 dereferenceable(40) %8, i8 0, i64 40, i1 false)
  %14 = getelementptr inbounds i8, ptr %1, i64 32
  %15 = load i32, ptr %14, align 8, !tbaa !11
  %16 = zext i32 %15 to i64
  %17 = tail call i32 @fseek(ptr noundef %0, i64 noundef %16, i32 noundef 0)
  %.not = icmp eq i32 %17, 0
  br i1 %.not, label %20, label %18

18:                                               ; preds = %13
  %19 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.7)
  tail call void @free(ptr noundef nonnull %8) #6
  br label %28

20:                                               ; preds = %13
  %21 = tail call i64 @fread(ptr noundef nonnull %8, i64 noundef 40, i64 noundef %6, ptr noundef %0)
  %22 = and i64 %21, 4294967295
  %23 = icmp eq i64 %22, 0
  br i1 %23, label %24, label %26

24:                                               ; preds = %20
  %25 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.8)
  tail call void @free(ptr noundef nonnull %8) #6
  br label %28

26:                                               ; preds = %20
  %27 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.9)
  br label %28

28:                                               ; preds = %26, %24, %18
  %.0 = phi ptr [ null, %18 ], [ null, %24 ], [ %8, %26 ]
  ret ptr %.0
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

; Function Attrs: nofree nounwind
declare noundef i32 @fseek(ptr nocapture noundef, i64 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #4

; Function Attrs: nofree nounwind
declare noundef i64 @fread(ptr nocapture noundef, i64 noundef, i64 noundef, ptr nocapture noundef) local_unnamed_addr #0

attributes #0 = { nofree nounwind "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 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 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 #5 = { nounwind allocsize(0) }
attributes #6 = { 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, !9, i64 48}
!6 = !{!"_ZTS10Elf32_Ehdr", !7, i64 0, !9, i64 16, !9, i64 18, !10, i64 20, !10, i64 24, !10, i64 28, !10, i64 32, !10, i64 36, !9, i64 40, !9, i64 42, !9, i64 44, !9, i64 46, !9, i64 48, !9, i64 50}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!"short", !7, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!6, !10, i64 32}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,TailCallElimPass