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i965/vs: Fix GPU hangs in shaders with large virtual GRFs pre-gen6.

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If you get your total GRF count wrong, you write over some other
shader's g0, and the GPU fails shortly thereafter.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Eric Anholt 2011-08-30 15:50:17 -07:00
parent 23eec54bb0
commit 8adcad213e
1 changed files with 2 additions and 1 deletions
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src/mesa/drivers/dri/i965/brw_vec4_reg_allocate.cpp
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@ -216,7 +216,8 @@ vec4_visitor::reg_allocate()
int reg = ra_get_node_reg(g, i);
hw_reg_mapping[i] = first_assigned_grf + brw->vs.ra_reg_to_grf[reg];
prog_data->total_grf = MAX2(prog_data->total_grf, hw_reg_mapping[i] + 1);
prog_data->total_grf = MAX2(prog_data->total_grf,
hw_reg_mapping[i] + virtual_grf_sizes[i]);
}
foreach_list(node, &this->instructions) {