nvc0/ir: can't have a join on a load with an indirect source

Triggers an INVALID_OPCODE warning on GK208. Seems rare enough to not
warrant verification on other chips. Fixes the new piglits:

  ubo_array_indexing/fs-nonuniform-control-flow.shader_test
  ubo_array_indexing/vs-nonuniform-control-flow.shader_test

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.5 10.6" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit 36e3eb6a957f8f20ed187ec88a067fc65cb81432)

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
index 85ebd1c..6643d96 100644 (file)
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp
@@ -2203,7 +2203,7 @@ FlatteningPass::visit(BasicBlock *bb)
              insn->op != OP_LINTERP && // probably just nve4
              insn->op != OP_PINTERP && // probably just nve4
              ((insn->op != OP_LOAD && insn->op != OP_STORE) ||
-              typeSizeof(insn->dType) <= 4) &&
+              (typeSizeof(insn->dType) <= 4 && !insn->src(0).isIndirect(0))) &&
              !insn->isNop()) {
             insn->join = 1;
             bb->remove(bb->getExit());