diff options
| author | Dave Airlie <[email protected]> | 2018-01-10 06:08:48 +0000 |
|---|---|---|
| committer | Dave Airlie <[email protected]> | 2018-01-18 03:38:17 +0000 |
| commit | 44a27cdceca0b835d964ca16db68721816ae868f (patch) | |
| tree | 26ba42a775cc7ff7636745448da406bbdb942078 | |
| parent | 3bb2b2cc451651247307ceb6f08ab06909437984 (diff) | |
r600/sb: add lds related peepholes.
if no destination:
a) convert _RET instructions to non _RET variants if no dst
b) set src0 to undefined if it's a READ, this should get DCE then.
Acked-By: Roland Scheidegger <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
| -rw-r--r-- | src/gallium/drivers/r600/sb/sb_peephole.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/gallium/drivers/r600/sb/sb_peephole.cpp b/src/gallium/drivers/r600/sb/sb_peephole.cpp index 49a6965b1f3..4390a8f525c 100644 --- a/src/gallium/drivers/r600/sb/sb_peephole.cpp +++ b/src/gallium/drivers/r600/sb/sb_peephole.cpp @@ -68,7 +68,14 @@ void peephole::run_on(container_node* c) { if (n->is_alu_inst()) { alu_node *a = static_cast<alu_node*>(n); - if (a->bc.op_ptr->flags & + if (a->bc.op_ptr->flags & AF_LDS) { + if (!a->dst[0]) { + if (a->bc.op >= LDS_OP2_LDS_ADD_RET && a->bc.op <= LDS_OP3_LDS_MSKOR_RET) + a->bc.set_op(a->bc.op - LDS_OP2_LDS_ADD_RET + LDS_OP2_LDS_ADD); + if (a->bc.op == LDS_OP1_LDS_READ_RET) + a->src[0] = sh.get_undef_value(); + } + } else if (a->bc.op_ptr->flags & (AF_PRED | AF_SET | AF_CMOV | AF_KILL)) { optimize_cc_op(a); } else if (a->bc.op == ALU_OP1_FLT_TO_INT) { |