The cmod propagation pass handles CMP and MOV.NZ. If we propagated a
conditional modifier other than NZ onto a MOV, it would be stuck there.
Convert these instructions into a CMP to let the cmod be propagated
further.
instructions in affected programs: 1482 -> 1454 (-1.89%)
helped: 6
---
src/mesa/drivers/dri/i965/brw_fs.cpp | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp
b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 200a494..61e286a 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -2312,6 +2312,16 @@ fs_visitor::opt_algebraic()
foreach_block_and_inst(block, fs_inst, inst, cfg) {
switch (inst->opcode) {
case BRW_OPCODE_MOV:
+ if (inst->dst.is_null() && inst->conditional_mod) {
+ inst->opcode = BRW_OPCODE_CMP;
+ inst->saturate = false;
+ inst->src[1] = fs_reg(0.0f);
+ inst->src[1].type = inst->src[0].type;
+ inst->dst.type = inst->src[0].type;
+ progress = true;
+ break;
+ }
+
if (inst->src[0].file != IMM)
break;
--
2.0.5
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