From: Eric Anholt <eric@anholt.net>
Date: Mon, 26 Jan 2015 22:37:42 +0000 (-0800)
Subject: nir: Don't try to to-SSA ALU instructions that are already SSA.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9a3a60cb138ea9a7fb29368c8c8efe614a7d80fe;p=mesa.git

nir: Don't try to to-SSA ALU instructions that are already SSA.

Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
---

diff --git a/src/glsl/nir/nir_to_ssa.c b/src/glsl/nir/nir_to_ssa.c
index 9c577fa9924..dbe1699c54c 100644
--- a/src/glsl/nir/nir_to_ssa.c
+++ b/src/glsl/nir/nir_to_ssa.c
@@ -239,6 +239,9 @@ rewrite_alu_instr_forward(nir_alu_instr *instr, rewrite_state *state)
 
    nir_foreach_src(&instr->instr, rewrite_use, state);
 
+   if (instr->dest.dest.is_ssa)
+      return;
+
    nir_register *reg = instr->dest.dest.reg.reg;
    unsigned index = reg->index;