search for: x86tcret

...cements about major > changes in the JIT on the ml, so I have no idea what might be going > wrong there. I haven't tested it, but the following pattern in X86Instr64bit.td looks suspicious as it appears to attempt to support direct tailcalls to arbitrary 64-bit immediates: def : Pat<(X86tcret GR64:$dst, imm:$off), (TCRETURNri64 GR64:$dst, imm:$off)>; Dan

Jon Harrop wrote: > I've come up with the following minimal repro that segfaults on my machine: Jon, were you able to resolve this? FWIW, TOT is causing all kinds of weird segfaults related to tail calls in my Pure interpreter, too (at least on x86-64). In my case these seem to be limited to the JIT, however (batch-compiled Pure programs via opt+llc all work fine, even with TCO), so