[llvm] [memprof] Call llvm::SmallVector::reserve (PR #93324)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/93324

None

>From 9a478bdc8612ee49c8ca0984a26eddb96699b3f4 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Fri, 24 May 2024 10:17:20 -0700
Subject: [PATCH] [memprof] Call llvm::SmallVector::reserve

---
 llvm/lib/ProfileData/MemProf.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/llvm/lib/ProfileData/MemProf.cpp b/llvm/lib/ProfileData/MemProf.cpp
index 5c86c0d9c7bbb..e5608644519db 100644
--- a/llvm/lib/ProfileData/MemProf.cpp
+++ b/llvm/lib/ProfileData/MemProf.cpp
@@ -208,6 +208,7 @@ static IndexedMemProfRecord deserializeV2(const MemProfSchema &Schema,
   // Read the meminfo nodes.
   const uint64_t NumNodes =
       endian::readNext<uint64_t, llvm::endianness::little>(Ptr);
+  Record.AllocSites.reserve(NumNodes);
   for (uint64_t I = 0; I < NumNodes; I++) {
     IndexedAllocationInfo Node;
     Node.CSId = endian::readNext<CallStackId, llvm::endianness::little>(Ptr);
@@ -219,6 +220,7 @@ static IndexedMemProfRecord deserializeV2(const MemProfSchema &Schema,
   // Read the callsite information.
   const uint64_t NumCtxs =
       endian::readNext<uint64_t, llvm::endianness::little>(Ptr);
+  Record.CallSiteIds.reserve(NumCtxs);
   for (uint64_t J = 0; J < NumCtxs; J++) {
     CallStackId CSId =
         endian::readNext<CallStackId, llvm::endianness::little>(Ptr);