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intel/compiler: Unset flag reg when FB write is not predicated

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In the FS IR we pretend that the instruction is predicated with (+f0.1)
just for flag dependency tracking purposes. Since the instruction
doesn't support predication before Haswell, we unset the predicate so we
should also unset the flag register so that we can round-trip the
disassembly.

Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Matt Turner 2019-04-29 16:01:08 -07:00
parent 5d7a9e0811
commit e8c74a1e16
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1 changed files with 1 additions and 0 deletions
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src/intel/compiler/brw_fs_generator.cpp
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@ -363,6 +363,7 @@ fs_generator::generate_fb_write(fs_inst *inst, struct brw_reg payload)
{
if (devinfo->gen < 8 && !devinfo->is_haswell) {
brw_set_default_predicate_control(p, BRW_PREDICATE_NONE);
brw_set_default_flag_reg(p, 0, 0);
}
const struct brw_reg implied_header =