search for: build_lis

Displaying 2 results from an estimated 2 matches for "build_lis".

2006 May 14
2
[LLVMdev] JIT machine code deletion
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
2006 May 14
0
[LLVMdev] JIT machine code deletion
...t; 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 > report it! No, EmitBranchToAt() always emits 16 bytes. AtI[0] = BUILD_LIS(12, Addr >> 16); // lis r12, hi16(address) AtI[1] = BUILD_ORI(12, 12, Addr); // ori r12, r12, low16(address) AtI[2] = BUILD_MTCTR(12); // mtctr r12 AtI[3] = BUILD_BCTR(isCall); // bctr/bctrl but I understand now how startFunctionStub() is given StubSize...