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i965: Stop doing remapping of "special" regs.

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Now that we aren't using pixel_[xy] in live variables, nothing is looking
at these regs after the visitor stage.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Eric Anholt 2014-05-06 15:19:55 -07:00
parent 66f5c8df06
commit afe3d1556f
1 changed files with 0 additions and 37 deletions
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37
src/mesa/drivers/dri/i965/brw_fs.cpp
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@ -1740,34 +1740,6 @@ fs_visitor::compact_virtual_grfs()
}
}
/* In addition to registers used in instructions, fs_visitor keeps
* direct references to certain special values which must be patched:
*/
struct {
fs_reg *reg;
unsigned count;
} special[] = {
{ &frag_depth, 1 },
{ &pixel_x, 1 },
{ &pixel_y, 1 },
{ &pixel_w, 1 },
{ &wpos_w, 1 },
{ &dual_src_output, 1 },
{ outputs, ARRAY_SIZE(outputs) },
{ delta_x, ARRAY_SIZE(delta_x) },
{ delta_y, ARRAY_SIZE(delta_y) },
{ &sample_mask, 1 },
{ &shader_start_time, 1 },
};
/* Treat all special values as used, to be conservative */
for (unsigned i = 0; i < ARRAY_SIZE(special); i++) {
for (unsigned j = 0; j < special[i].count; j++) {
if (special[i].reg[j].file == GRF)
remap_table[special[i].reg[j].reg] = 0;
}
}
/* Compact the GRF arrays. */
int new_index = 0;
for (int i = 0; i < this->virtual_grf_count; i++) {
@ -1793,15 +1765,6 @@ fs_visitor::compact_virtual_grfs()
inst->src[i].reg = remap_table[inst->src[i].reg];
}
}
/* Patch all the references to special values */
for (unsigned i = 0; i < ARRAY_SIZE(special); i++) {
for (unsigned j = 0; j < special[i].count; j++) {
fs_reg *reg = &special[i].reg[j];
if (reg->file == GRF && remap_table[reg->reg] != -1)
reg->reg = remap_table[reg->reg];
}
}
}
/*