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nir: Copy-propagate vecN operations that are actually moves 

We were already do this for ALU operations but we haven't for non-ALU
operations.  This changes that.

total NIR instructions in shared programs: 2039883 -> 2022338 (-0.86%)
NIR instructions in affected programs:     1768850 -> 1751305 (-0.99%)
helped:                                    14244
HURT:                                      124

total FS instructions in shared programs: 4083960 -> 4084036 (0.00%)
FS instructions in affected programs:     7302 -> 7378 (1.04%)
helped:                                   12
HURT:                                     51

Signed-off-by: Jason Ekstrand <jason.ekstrand@intel.com>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Jason Ekstrand 2015-02-19 17:19:22 -08:00
parent f80af89d48
commit cb4b2ad44a
1 changed files with 29 additions and 16 deletions
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45
src/glsl/nir/nir_opt_copy_propagate.c
View File

@ -53,22 +53,6 @@ static bool is_move(nir_alu_instr *instr)
}
static bool
is_swizzleless_move(nir_alu_instr *instr)
{
if (!is_move(instr))
return false;
for (unsigned i = 0; i < 4; i++) {
if (!((instr->dest.write_mask >> i) & 1))
break;
if (instr->src[0].swizzle[i] != i)
return false;
}
return true;
}
static bool is_vec(nir_alu_instr *instr)
{
for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++)
@ -80,6 +64,35 @@ static bool is_vec(nir_alu_instr *instr)
instr->op == nir_op_vec4;
}
static bool
is_swizzleless_move(nir_alu_instr *instr)
{
if (is_move(instr)) {
for (unsigned i = 0; i < 4; i++) {
if (!((instr->dest.write_mask >> i) & 1))
break;
if (instr->src[0].swizzle[i] != i)
return false;
}
return true;
} else if (is_vec(instr)) {
nir_ssa_def *def = NULL;
for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) {
if (instr->src[i].swizzle[0] != i)
return false;
if (def == NULL) {
def = instr->src[i].src.ssa;
} else if (instr->src[i].src.ssa != def) {
return false;
}
}
return true;
} else {
return false;
}
}
typedef struct {
nir_ssa_def *def;
bool found;