Mesa (master): i965/vec4: Perform CSE on MOV ..., VF instructions.
Matt Turner
mattst88 at kemper.freedesktop.org
Mon Dec 29 20:15:45 UTC 2014
Module: Mesa
Branch: master
Commit: 7463e6d61bdd2a3f8cd8b2649d96cb03de1351de
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=7463e6d61bdd2a3f8cd8b2649d96cb03de1351de
Author: Matt Turner <mattst88 at gmail.com>
Date: Thu Apr 3 14:29:30 2014 -0700
i965/vec4: Perform CSE on MOV ..., VF instructions.
Port of commit a28ad9d4 from the fs backend.
No shader-db changes since we don't emit MOV ..., VF instructions yet.
Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>
---
src/mesa/drivers/dri/i965/brw_vec4_cse.cpp | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_cse.cpp b/src/mesa/drivers/dri/i965/brw_vec4_cse.cpp
index 7071213..37c930c 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_cse.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_cse.cpp
@@ -48,6 +48,7 @@ static bool
is_expression(const vec4_instruction *const inst)
{
switch (inst->opcode) {
+ case BRW_OPCODE_MOV:
case BRW_OPCODE_SEL:
case BRW_OPCODE_NOT:
case BRW_OPCODE_AND:
@@ -154,11 +155,16 @@ vec4_visitor::opt_cse_local(bblock_t *block)
}
if (!found) {
- /* Our first sighting of this expression. Create an entry. */
- aeb_entry *entry = ralloc(cse_ctx, aeb_entry);
- entry->tmp = src_reg(); /* file will be BAD_FILE */
- entry->generator = inst;
- aeb.push_tail(entry);
+ if (inst->opcode != BRW_OPCODE_MOV ||
+ (inst->opcode == BRW_OPCODE_MOV &&
+ inst->src[0].file == IMM &&
+ inst->src[0].type == BRW_REGISTER_TYPE_VF)) {
+ /* Our first sighting of this expression. Create an entry. */
+ aeb_entry *entry = ralloc(cse_ctx, aeb_entry);
+ entry->tmp = src_reg(); /* file will be BAD_FILE */
+ entry->generator = inst;
+ aeb.push_tail(entry);
+ }
} else {
/* This is at least our second sighting of this expression.
* If we don't have a temporary already, make one.
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