; LLVM IR from whoiswelliton/Computer_Engineering_UTFPR-PB :: Embedded_Systems/TIVA Connected TM4C1294XL Projects/01 - lwIP_HTTPServer_on_TIVA (calloc)

; 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: 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
declare dso_local ptr @mem_malloc(i16 noundef zeroext) #1

; Function Attrs: nounwind uwtable
define dso_local ptr @mem_calloc(i16 noundef zeroext %0, i16 noundef zeroext %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i16, align 2
  %5 = alloca i16, align 2
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  store i16 %0, ptr %4, align 2, !tbaa !5
  store i16 %1, ptr %5, align 2, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %9 = load i16, ptr %4, align 2, !tbaa !5
  %10 = zext i16 %9 to i64
  %11 = load i16, ptr %5, align 2, !tbaa !5
  %12 = zext i16 %11 to i64
  %13 = mul i64 %10, %12
  store i64 %13, ptr %7, align 8, !tbaa !9
  %14 = load i64, ptr %7, align 8, !tbaa !9
  %15 = trunc i64 %14 to i16
  %16 = zext i16 %15 to i64
  %17 = load i64, ptr %7, align 8, !tbaa !9
  %18 = icmp ne i64 %16, %17
  br i1 %18, label %19, label %20

19:                                               ; preds = %2
  store ptr null, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %31

20:                                               ; preds = %2
  %21 = load i64, ptr %7, align 8, !tbaa !9
  %22 = trunc i64 %21 to i16
  %23 = call ptr @mem_malloc(i16 noundef zeroext %22)
  store ptr %23, ptr %6, align 8, !tbaa !11
  %24 = load ptr, ptr %6, align 8, !tbaa !11
  %25 = icmp ne ptr %24, null
  br i1 %25, label %26, label %29

26:                                               ; preds = %20
  %27 = load ptr, ptr %6, align 8, !tbaa !11
  %28 = load i64, ptr %7, align 8, !tbaa !9
  call void @llvm.memset.p0.i64(ptr align 1 %27, i8 0, i64 %28, i1 false)
  br label %29

29:                                               ; preds = %26, %20
  %30 = load ptr, ptr %6, align 8, !tbaa !11
  store ptr %30, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %31

31:                                               ; preds = %29, %19
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %32 = load ptr, ptr %3, align 8
  ret ptr %32
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { 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 = !{!"short", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"any pointer", !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: nounwind uwtable
declare dso_local ptr @mem_malloc(i16 noundef zeroext) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local ptr @mem_calloc(i16 noundef zeroext %0, i16 noundef zeroext %1) local_unnamed_addr #0 {
  %3 = zext i16 %0 to i64
  %4 = zext i16 %1 to i64
  %5 = mul nuw nsw i64 %4, %3
  %.not = icmp ult i64 %5, 65536
  br i1 %.not, label %6, label %10

6:                                                ; preds = %2
  %7 = trunc nuw i64 %5 to i16
  %8 = tail call ptr @mem_malloc(i16 noundef zeroext %7)
  %.not11 = icmp eq ptr %8, null
  br i1 %.not11, label %10, label %9

9:                                                ; preds = %6
  tail call void @llvm.memset.p0.i64(ptr nonnull align 1 %8, i8 0, i64 %5, i1 false)
  br label %10

10:                                               ; preds = %6, %9, %2
  %.0 = phi ptr [ null, %2 ], [ %8, %9 ], [ null, %6 ]
  ret ptr %.0
}

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

!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: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass