; LLVM IR from AmplitudeAudio/sdk :: src/Utils/SmMalloc/smmalloc_generic.ll (ZN2sm16GenericAllocator5AllocEPvmm)

; 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.Header = type { ptr, i64 }

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_ZN2sm16GenericAllocator5AllocEPvmm(ptr noundef %0, i64 noundef %1, i64 noundef %2) #0 align 2 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca i64, align 8
  %11 = alloca i32, align 4
  %12 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !9
  %13 = load i64, ptr %7, align 8, !tbaa !9
  %14 = icmp ult i64 %13, 4
  br i1 %14, label %15, label %16

15:                                               ; preds = %3
  store i64 4, ptr %7, align 8, !tbaa !9
  br label %16

16:                                               ; preds = %15, %3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  %17 = load i64, ptr %7, align 8, !tbaa !9
  %18 = sub i64 %17, 1
  %19 = add i64 %18, 16
  store i64 %19, ptr %10, align 8, !tbaa !9
  %20 = load i64, ptr %6, align 8, !tbaa !9
  %21 = load i64, ptr %10, align 8, !tbaa !9
  %22 = add i64 %20, %21
  %23 = call noalias ptr @malloc(i64 noundef %22) #4
  store ptr %23, ptr %8, align 8, !tbaa !5
  %24 = icmp eq ptr %23, null
  br i1 %24, label %25, label %26

25:                                               ; preds = %16
  store ptr null, ptr %4, align 8
  store i32 1, ptr %11, align 4
  br label %45

26:                                               ; preds = %16
  %27 = load ptr, ptr %8, align 8, !tbaa !5
  %28 = ptrtoint ptr %27 to i64
  %29 = load i64, ptr %10, align 8, !tbaa !9
  %30 = add i64 %28, %29
  %31 = load i64, ptr %7, align 8, !tbaa !9
  %32 = sub i64 %31, 1
  %33 = xor i64 %32, -1
  %34 = and i64 %30, %33
  %35 = inttoptr i64 %34 to ptr
  store ptr %35, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #3
  %36 = load ptr, ptr %9, align 8, !tbaa !5
  %37 = getelementptr inbounds i8, ptr %36, i64 -16
  store ptr %37, ptr %12, align 8, !tbaa !5
  %38 = load ptr, ptr %8, align 8, !tbaa !5
  %39 = load ptr, ptr %12, align 8, !tbaa !5
  %40 = getelementptr inbounds %struct.Header, ptr %39, i32 0, i32 0
  store ptr %38, ptr %40, align 8, !tbaa !11
  %41 = load i64, ptr %6, align 8, !tbaa !9
  %42 = load ptr, ptr %12, align 8, !tbaa !5
  %43 = getelementptr inbounds %struct.Header, ptr %42, i32 0, i32 1
  store i64 %41, ptr %43, align 8, !tbaa !13
  %44 = load ptr, ptr %9, align 8, !tbaa !5
  store ptr %44, ptr %4, align 8
  store i32 1, ptr %11, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #3
  br label %45

45:                                               ; preds = %26, %25
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %46 = load ptr, ptr %4, align 8
  ret ptr %46
}

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

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

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

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { nounwind }
attributes #4 = { 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, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTS6Header", !6, i64 0, !10, i64 8}
!13 = !{!12, !10, i64 8}


; 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: mustprogress nofree nounwind willreturn memory(write, inaccessiblemem: readwrite) uwtable
define dso_local noundef ptr @_ZN2sm16GenericAllocator5AllocEPvmm(ptr nocapture noundef readnone %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 align 2 {
  %spec.store.select = tail call i64 @llvm.umax.i64(i64 %2, i64 4)
  %4 = add i64 %spec.store.select, 15
  %5 = add i64 %4, %1
  %6 = tail call noalias ptr @malloc(i64 noundef %5) #3
  %7 = icmp eq ptr %6, null
  br i1 %7, label %16, label %8

8:                                                ; preds = %3
  %9 = ptrtoint ptr %6 to i64
  %10 = add i64 %4, %9
  %11 = sub i64 0, %spec.store.select
  %12 = and i64 %10, %11
  %13 = inttoptr i64 %12 to ptr
  %14 = getelementptr inbounds i8, ptr %13, i64 -16
  store ptr %6, ptr %14, align 8, !tbaa !5
  %15 = getelementptr inbounds i8, ptr %13, i64 -8
  store i64 %1, ptr %15, align 8, !tbaa !11
  br label %16

16:                                               ; preds = %3, %8
  %.0 = phi ptr [ %13, %8 ], [ null, %3 ]
  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 #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.umax.i64(i64, i64) #2

attributes #0 = { mustprogress nofree nounwind willreturn memory(write, inaccessiblemem: readwrite) 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 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 #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #3 = { 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, !7, i64 0}
!6 = !{!"_ZTS6Header", !7, i64 0, !10, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!6, !10, i64 8}


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