Add an option to allocate JITed global data separately from code. By

default, this option is not enabled to support clients who rely on
this behavior.

Fixes http://llvm.org/PR4483

A patch to allocate additional memory for globals after we run out is
forthcoming.

Patch by Reid Kleckner!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75059 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/JITCodeEmitter.h b/include/llvm/CodeGen/JITCodeEmitter.h
index 73197af1af..cb9a0a1fa9 100644
--- a/include/llvm/CodeGen/JITCodeEmitter.h
+++ b/include/llvm/CodeGen/JITCodeEmitter.h
@@ -267,6 +267,11 @@ public:
     return Result;
   }
 
+  /// allocateGlobal - Allocate memory for a global.  Unlike allocateSpace,
+  /// this method does not allocate memory in the current output buffer,
+  /// because a global may live longer than the current function.
+  virtual void *allocateGlobal(uintptr_t Size, unsigned Alignment) = 0;
+
   /// StartMachineBasicBlock - This should be called by the target when a new
   /// basic block is about to be emitted.  This way the MCE knows where the
   /// start of the block is, and can implement getMachineBasicBlockAddress.