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i965/fs: Constant propagate into 2-src math instructions on Gen8.

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total instructions in shared programs: 1878133 -> 1876986 (-0.06%)
instructions in affected programs:     153007 -> 151860 (-0.75%)

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Matt Turner 2014-06-23 22:07:20 -07:00
parent aca4a951ea
commit 038eb649b3
1 changed files with 9 additions and 2 deletions
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11
src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp
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@ -368,7 +368,8 @@ fs_visitor::try_copy_propagate(fs_inst *inst, int arg, acp_entry *entry)
static bool
try_constant_propagate(fs_inst *inst, acp_entry *entry)
try_constant_propagate(struct brw_context *brw, fs_inst *inst,
acp_entry *entry)
{
bool progress = false;
@ -396,6 +397,12 @@ try_constant_propagate(fs_inst *inst, acp_entry *entry)
progress = true;
break;
case SHADER_OPCODE_POW:
case SHADER_OPCODE_INT_QUOTIENT:
case SHADER_OPCODE_INT_REMAINDER:
if (brw->gen < 8)
break;
/* fallthrough */
case BRW_OPCODE_BFI1:
case BRW_OPCODE_ASR:
case BRW_OPCODE_SHL:
@ -537,7 +544,7 @@ fs_visitor::opt_copy_propagate_local(void *copy_prop_ctx, bblock_t *block,
foreach_list(entry_node, &acp[inst->src[i].reg % ACP_HASH_SIZE]) {
acp_entry *entry = (acp_entry *)entry_node;
if (try_constant_propagate(inst, entry))
if (try_constant_propagate(brw, inst, entry))
progress = true;
if (try_copy_propagate(inst, i, entry))