diff options
| author | Iago Toral Quiroga <[email protected]> | 2015-11-06 12:08:49 +0100 |
|---|---|---|
| committer | Iago Toral Quiroga <[email protected]> | 2015-11-13 07:54:33 +0100 |
| commit | 8610cd6b8c71b92a8e68603c030961e36faa0ef4 (patch) | |
| tree | 703edf0c1ac41d43b43c6a8f5f0bbd59de2139b9 /src/glsl/nir | |
| parent | 5f43e074d4a4e74b1238a5687da5d38e53ad4596 (diff) | |
nir/copy_propagate: do not copy-propagate MOV srcs with source modifiers
If a source operand in a MOV has source modifiers, then we cannot
copy-propagate it from the parent instruction and remove the MOV.
v2: remove the check for source source modifiers from is_move() (Jason)
Reviewed-by: Jason Ekstrand <[email protected]>
Diffstat (limited to 'src/glsl/nir')
| -rw-r--r-- | src/glsl/nir/nir_opt_copy_propagate.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/src/glsl/nir/nir_opt_copy_propagate.c b/src/glsl/nir/nir_opt_copy_propagate.c index 7d8bdd7f2ca..2611069dd5c 100644 --- a/src/glsl/nir/nir_opt_copy_propagate.c +++ b/src/glsl/nir/nir_opt_copy_propagate.c @@ -41,11 +41,6 @@ static bool is_move(nir_alu_instr *instr) if (instr->dest.saturate) return false; - /* we handle modifiers in a separate pass */ - - if (instr->src[0].abs || instr->src[0].negate) - return false; - if (!instr->src[0].src.is_ssa) return false; @@ -65,9 +60,13 @@ static bool is_vec(nir_alu_instr *instr) } static bool -is_swizzleless_move(nir_alu_instr *instr) +is_simple_move(nir_alu_instr *instr) { if (is_move(instr)) { + /* We handle modifiers in a separate pass */ + if (instr->src[0].negate || instr->src[0].abs) + return false; + for (unsigned i = 0; i < 4; i++) { if (!((instr->dest.write_mask >> i) & 1)) break; @@ -81,6 +80,10 @@ is_swizzleless_move(nir_alu_instr *instr) if (instr->src[i].swizzle[0] != i) return false; + /* We handle modifiers in a separate pass */ + if (instr->src[i].negate || instr->src[i].abs) + return false; + if (def == NULL) { def = instr->src[i].src.ssa; } else if (instr->src[i].src.ssa != def) { @@ -107,7 +110,7 @@ copy_prop_src(nir_src *src, nir_instr *parent_instr, nir_if *parent_if) return false; nir_alu_instr *alu_instr = nir_instr_as_alu(src_instr); - if (!is_swizzleless_move(alu_instr)) + if (!is_simple_move(alu_instr)) return false; /* Don't let copy propagation land us with a phi that has more |