On Mon, Mar 19, 2012 at 5:55 PM, H.J. Lu <hjl.to...@gmail.com> wrote:
>>> For x32, thread pointer is an unsigned 32bit value. >>> >>> movl %fs:0, %eax >>> >>> is the correct instruction to load thread pointer into EAX and RAX. >> >> So, where is ZERO_EXTEND RTX then? >> > > Thread pointer (TP) is an opaque value to GCC. GCC needs to load > TP into a SImode or DImode register. ZERO_EXTEND isn't needed > when there is a single instruction to load TP into a DImode register. I don't agree with this explanation. The mode can't be SImode and DImode. TP is either SImode or ZERO_EXTENDed to DImode, this is the reason we went for all that TARGET_X32 stuff in TP load RTX. Please test my proposed patch. If it works OK, I will commit it to SVN. Thanks, Uros.
