From: Rob Clark <robdclark@gmail.com>
Date: Fri, 6 Apr 2018 12:28:53 +0000 (-0400)
Subject: nir: add comment about nir_src_copy()
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c4457113e9327ce16e56fbf5a38a694e04849ab3;p=mesa.git

nir: add comment about nir_src_copy()

So it is more clear about when to use nir_instr_rewrite_src()

Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
---

diff --git a/src/compiler/nir/nir.c b/src/compiler/nir/nir.c
index 8364197480b..ef911540f37 100644
--- a/src/compiler/nir/nir.c
+++ b/src/compiler/nir/nir.c
@@ -212,6 +212,9 @@ nir_function_create(nir_shader *shader, const char *name)
    return func;
 }
 
+/* NOTE: if the instruction you are copying a src to is already added
+ * to the IR, use nir_instr_rewrite_src() instead.
+ */
 void nir_src_copy(nir_src *dest, const nir_src *src, void *mem_ctx)
 {
    dest->is_ssa = src->is_ssa;