; LLVM IR from simonaertssen/MIT-6.172-Performance-Engineering-of-Software-Systems :: Week 1 Introduction/c-primer (pointer)

; 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"

@__const.main.c = external hidden unnamed_addr constant [6 x i8], align 1
@.str = external hidden unnamed_addr constant [13 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @main(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca [6 x i8], align 1
  %10 = alloca ptr, align 8
  %11 = alloca i8, align 1
  %12 = alloca ptr, align 8
  %13 = alloca ptr, align 8
  %14 = alloca ptr, align 8
  %15 = alloca ptr, align 8
  %16 = alloca ptr, align 8
  store i32 0, ptr %3, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 5, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  store ptr %6, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  %17 = load ptr, ptr %7, align 8, !tbaa !9
  %18 = load i32, ptr %17, align 4, !tbaa !5
  store i32 %18, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 6, ptr %9) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %9, ptr align 1 @__const.main.c, i64 6, i1 false)
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #4
  %19 = getelementptr inbounds [6 x i8], ptr %9, i64 0, i64 0
  store ptr %19, ptr %10, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 1, ptr %11) #4
  %20 = load ptr, ptr %10, align 8, !tbaa !9
  %21 = load i8, ptr %20, align 1, !tbaa !11
  store i8 %21, ptr %11, align 1, !tbaa !11
  %22 = load i8, ptr %11, align 1, !tbaa !11
  %23 = sext i8 %22 to i32
  %24 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %23)
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #4
  %25 = load ptr, ptr %5, align 8, !tbaa !9
  store ptr %25, ptr %12, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #4
  %26 = getelementptr inbounds [6 x i8], ptr %9, i64 0, i64 0
  store ptr %26, ptr %13, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %14) #4
  %27 = getelementptr inbounds [6 x i8], ptr %9, i64 0, i64 0
  store ptr %27, ptr %14, align 8, !tbaa !9
  %28 = load ptr, ptr %12, align 8, !tbaa !9
  %29 = load ptr, ptr %28, align 8, !tbaa !9
  store ptr %29, ptr %13, align 8, !tbaa !9
  %30 = load ptr, ptr %5, align 8, !tbaa !9
  %31 = getelementptr inbounds ptr, ptr %30, i64 0
  %32 = load ptr, ptr %31, align 8, !tbaa !9
  store ptr %32, ptr %13, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %15) #4
  %33 = getelementptr inbounds [6 x i8], ptr %9, i64 0, i64 0
  store ptr %33, ptr %15, align 8, !tbaa !9
  %34 = load ptr, ptr %15, align 8, !tbaa !9
  store i8 33, ptr %34, align 1, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %16) #4
  %35 = getelementptr inbounds [6 x i8], ptr %9, i64 0, i64 0
  store ptr %35, ptr %16, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %16) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %15) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %14) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #4
  call void @llvm.lifetime.end.p0(i64 1, ptr %11) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #4
  call void @llvm.lifetime.end.p0(i64 6, ptr %9) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  ret i32 0
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

declare i32 @printf(ptr noundef, ...) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { "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 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!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"

@__const.main.c = external hidden unnamed_addr constant [6 x i8], align 1
@.str = external hidden unnamed_addr constant [13 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local noundef i32 @main(i32 noundef %0, ptr nocapture noundef readnone %1) local_unnamed_addr #0 {
  %.sroa.0.0.copyload = load i8, ptr @__const.main.c, align 1
  %3 = sext i8 %.sroa.0.0.copyload to i32
  %4 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %3)
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

attributes #0 = { nofree 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 #1 = { 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" }

!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)"}


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