From: Nicolas Geoffray <nicolas.geoffray@lip6.fr>
Date: Fri, 12 Jun 2009 14:11:08 +0000 (+0000)
Subject: After obtaining the lock, look if the function has been codegen'd by
X-Git-Tag: android-x86-6.0-r1~1003^2~20073
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=e91208c9631c98abbdce19ca7b1f51d9241faa18;p=android-x86%2Fexternal-llvm.git

After obtaining the lock, look if the function has been codegen'd by
another thread.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73227 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/ExecutionEngine/JIT/JIT.cpp b/lib/ExecutionEngine/JIT/JIT.cpp
index f8ae8844616..43995cb0ecd 100644
--- a/lib/ExecutionEngine/JIT/JIT.cpp
+++ b/lib/ExecutionEngine/JIT/JIT.cpp
@@ -563,6 +563,11 @@ void *JIT::getPointerToFunction(Function *F) {
     return Addr;   // Check if function already code gen'd
 
   MutexGuard locked(lock);
+  
+  // Now that this thread owns the lock, check if another thread has already
+  // code gen'd the function.
+  if (void *Addr = getPointerToGlobalIfAvailable(F))
+    return Addr;  
 
   // Make sure we read in the function if it exists in this Module.
   if (F->hasNotBeenReadFromBitcode()) {