https://bugs.freedesktop.org/show_bug.cgi?id=54832
--- Comment #1 from Tomasz P. <son_of_the_osiris at interia.pl> 2012-09-13
13:05:08 UTC ---
Someone on the mailing list suspects that in r300 compiler is somekind of bug.
He wrote:
In playing with Coccinelle, I discovered a signed/unsigned bug in
radeon_rename_regs.c:rc_rename_regs.
unsigned new_index;
unsigned writemask;
struct rc_variable * var = var_ptr->Item;
if (var->Inst->U.I.DstReg.File != RC_FILE_TEMPORARY) {
continue;
}
new_index = rc_find_free_temporary_list(c, used, used_length,
RC_MASK_XYZW);
if (new_index < 0) {
rc_error(c, "Ran out of temporary registers\n");
return;
}
unsigned new_index is compared with < 0.
I don't know the code, but I can't imagine that you'd need an unsigned
to represent a register index value.
Matt Turner
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