[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Lightning] jit_movr broken on MIPS

From: Paul Cercueil
Subject: [Lightning] jit_movr broken on MIPS
Date: Sat, 22 Nov 2014 22:38:01 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.2.0


I have a problem when compiling for MIPS.

Very rarely, one call to jit_movr() is optimized out even though the source and destination registers differ. This also happens with jit_retval_i() (as it calls jit_movr internally).

As a result my generated code is wrong and fails at runtime. I currently work around that by patching the references to jit_movr(dest, src) with jit_orr(dest, _ZERO, src); then my program runs fine.

It is fully reproductible but it happens only once or twice in my disassembly log (which is ~6 MiB); I couldn't manage to create a simple test case which reproduces the issue.

Did anybody run into a similar issue?
Any pointers to what could be the cause?


reply via email to

[Prev in Thread] Current Thread [Next in Thread]