[LLVMdev] JIT machine code deletion
sabre at nondot.org
Sat May 13 19:31:36 PDT 2006
On Fri, 12 May 2006, Ralph Corderoy wrote:
>> If you don't *know* that all (e.g.) function pointers to this code are
>> dead (which means that execution could come back to the function), you
>> should use the ExecutionEngine::recompileAndRelinkFunction(F) method.
> recompileAndRelinkFunction() overwrites the old machine code with a
> branch to the new. Is it always guaranteed that there's space to write
> the new branch instructions?
> A quick look suggests the x86 takes five
> bytes, PowerPC 16,
PPC should be 4 bytes in the normal case. It is up to the backend to
implement this API correctly... if it doesn't, that's a bug: please
More information about the llvm-dev