[Mesa-stable] [PATCH] nv50/ir: handle insn not being there for definition of CVT arg

[Ilia Mirkin]

This can happen if it's e.g. a uniform or a function argument.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111217
Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
Cc: mesa-stable at lists.freedesktop.org
---
 src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
index 0b3220903b9..bfdb923379b 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
@@ -2080,14 +2080,15 @@ void
 AlgebraicOpt::handleCVT_CVT(Instruction *cvt)
 {
    Instruction *insn = cvt->getSrc(0)->getInsn();
-   RoundMode rnd = insn->rnd;
 
-   if (insn->saturate ||
+   if (!insn ||
+       insn->saturate ||
        insn->subOp ||
        insn->dType != insn->sType ||
        insn->dType != cvt->sType)
       return;
 
+   RoundMode rnd = insn->rnd;
    switch (insn->op) {
    case OP_CEIL:
       rnd = ROUND_PI;
-- 
2.21.0