[Mesa-dev] [PATCH] nir: Don't try to to-SSA ALU instructions that are already SSA.

[Eric Anholt]

---
The i965 driver apparently only has things all in ssa or all in non-ssa, while
for TGSI I ended up doing some things directly in SSA before the to-SSA pass.

src/glsl/nir/nir_to_ssa.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/glsl/nir/nir_to_ssa.c b/src/glsl/nir/nir_to_ssa.c
index 9c577fa..dbe1699 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;
 
-- 
2.1.4