From dd2c82a427a089e7c704af44eeeb2a10a38e2519 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sun, 15 Feb 2004 05:54:06 +0000
Subject: [PATCH] Make the JIT zero out globals with memset instead of an
 element at a time.  This should speed it up a bit on a lot of programs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11472 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/ExecutionEngine/ExecutionEngine.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/ExecutionEngine/ExecutionEngine.cpp b/lib/ExecutionEngine/ExecutionEngine.cpp
index 665b5c62737..4e45bfa24ec 100644
--- a/lib/ExecutionEngine/ExecutionEngine.cpp
+++ b/lib/ExecutionEngine/ExecutionEngine.cpp
@@ -406,6 +406,10 @@ void ExecutionEngine::InitializeMemory(const Constant *Init, void *Addr) {
     GenericValue Val = getConstantValue(Init);
     StoreValueToMemory(Val, (GenericValue*)Addr, Init->getType());
     return;
+  } else if (isa<ConstantAggregateZero>(Init)) {
+    unsigned Size = getTargetData().getTypeSize(Init->getType());
+    memset(Addr, 0, Size);
+    return;
   }
 
   switch (Init->getType()->getPrimitiveID()) {
-- 
2.34.1