---
src/glsl/nir/nir.c | 24 ++++++++++++++++++++++++
src/glsl/nir/nir.h | 2 ++
2 files changed, 26 insertions(+)
diff --git a/src/glsl/nir/nir.c b/src/glsl/nir/nir.c
index e173b21..0090b08 100644
--- a/src/glsl/nir/nir.c
+++ b/src/glsl/nir/nir.c
@@ -1175,6 +1175,30 @@ nir_if_rewrite_condition(nir_if *if_stmt, nir_src
new_src)
}
void
+nir_instr_rewrite_dest(nir_instr *instr, nir_dest *dest, nir_dest new_dest)
+{
+ if (dest->is_ssa) {
+ /* We can only overwrite an SSA destination if it has no uses. */
+ assert(list_empty(&dest->ssa.uses) && list_empty(&dest->ssa.if_uses));
+ } else {
+ list_del(&dest->reg.def_link);
+ if (dest->reg.indirect)
+ src_remove_all_uses(dest->reg.indirect);
+ }
+
+ /* We can't re-write with an SSA def */
+ assert(!new_dest.is_ssa);
+
+ nir_dest_copy(dest, &new_dest, instr);
+
+ dest->reg.parent_instr = instr;
+ list_addtail(&dest->reg.def_link, &new_dest.reg.reg->defs);
+
+ if (dest->reg.indirect)
+ src_add_all_uses(dest->reg.indirect, instr, NULL);
+}
+
+void
nir_ssa_def_init(nir_instr *instr, nir_ssa_def *def,
unsigned num_components, const char *name)
{
diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h
index 32c338c..a8e7363 100644
--- a/src/glsl/nir/nir.h
+++ b/src/glsl/nir/nir.h
@@ -1725,6 +1725,8 @@ bool nir_srcs_equal(nir_src src1, nir_src src2);
void nir_instr_rewrite_src(nir_instr *instr, nir_src *src, nir_src new_src);
void nir_instr_move_src(nir_instr *dest_instr, nir_src *dest, nir_src *src);
void nir_if_rewrite_condition(nir_if *if_stmt, nir_src new_src);
+void nir_instr_rewrite_dest(nir_instr *instr, nir_dest *dest,
+ nir_dest new_dest);
void nir_ssa_dest_init(nir_instr *instr, nir_dest *dest,
unsigned num_components, const char *name);
--
2.5.0.400.gff86faf
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