diff options
Diffstat (limited to 'src/glsl/nir/nir.c')
| -rw-r--r-- | src/glsl/nir/nir.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/glsl/nir/nir.c b/src/glsl/nir/nir.c index 20826b874e5..e988ca4f248 100644 --- a/src/glsl/nir/nir.c +++ b/src/glsl/nir/nir.c @@ -1683,6 +1683,67 @@ nir_srcs_equal(nir_src src1, nir_src src2) } } +static bool +src_does_not_use_def(nir_src *src, void *void_def) +{ + nir_ssa_def *def = void_def; + + if (src->is_ssa) { + return src->ssa != def; + } else { + return true; + } +} + +static bool +src_does_not_use_reg(nir_src *src, void *void_reg) +{ + nir_register *reg = void_reg; + + if (src->is_ssa) { + return true; + } else { + return src->reg.reg != reg; + } +} + +void +nir_instr_rewrite_src(nir_instr *instr, nir_src *src, nir_src new_src) +{ + if (src->is_ssa) { + nir_ssa_def *old_ssa = src->ssa; + *src = new_src; + if (old_ssa && nir_foreach_src(instr, src_does_not_use_def, old_ssa)) { + struct set_entry *entry = _mesa_set_search(old_ssa->uses, + _mesa_hash_pointer(instr), + instr); + assert(entry); + _mesa_set_remove(old_ssa->uses, entry); + } + } else { + if (src->reg.indirect) + nir_instr_rewrite_src(instr, src->reg.indirect, new_src); + + nir_register *old_reg = src->reg.reg; + *src = new_src; + if (old_reg && nir_foreach_src(instr, src_does_not_use_reg, old_reg)) { + struct set_entry *entry = _mesa_set_search(old_reg->uses, + _mesa_hash_pointer(instr), + instr); + assert(entry); + _mesa_set_remove(old_reg->uses, entry); + } + } + + if (new_src.is_ssa) { + if (new_src.ssa) + _mesa_set_add(new_src.ssa->uses, _mesa_hash_pointer(instr), instr); + } else { + if (new_src.reg.reg) + _mesa_set_add(new_src.reg.reg->uses, _mesa_hash_pointer(instr), instr); + } +} + void nir_ssa_def_init(nir_function_impl *impl, nir_instr *instr, nir_ssa_def *def, unsigned num_components, const char *name) |