From 0834607a891f7c2529d1f2cdeca28b6e98899f8b Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Fri, 25 Mar 2011 11:19:53 -0700
Subject: i965/fs: Enable constant propagation in 16-wide.
All that needed fixing was skipping the newly-possible
uncompressed/sechalf partial GRF constant writes.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
---
src/mesa/drivers/dri/i965/brw_fs.cpp | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
(limited to 'src')
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index b0fe0c7..7d1be5c 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -3107,10 +3107,6 @@ fs_visitor::propagate_constants()
{
bool progress = false;
- /* Need to update the MRF tracking for compressed instructions. */
- if (c->dispatch_width == 16)
- return false;
-
calculate_live_intervals();
foreach_iter(exec_list_iterator, iter, this->instructions) {
@@ -3119,7 +3115,9 @@ fs_visitor::propagate_constants()
if (inst->opcode != BRW_OPCODE_MOV ||
inst->predicated ||
inst->dst.file != GRF || inst->src[0].file != IMM ||
- inst->dst.type != inst->src[0].type)
+ inst->dst.type != inst->src[0].type ||
+ (c->dispatch_width == 16 &&
+ (inst->force_uncompressed || inst->force_sechalf)))
continue;
/* Don't bother with cases where we should have had the
--
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