[Mesa-stable] [PATCH] gk104/ir: fix conditions for adding a texbar

[Ilia Mirkin]

Sometimes a register source can actually be double- or even quad-wide.
We must make sure that the inserted texbars take that width into
account.

Based on an earlier patch by Samuel Pitoiset.

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
Cc: "12.0 11.2" <mesa-stable at lists.freedesktop.org>
---
 src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
index 689fecf..cb82216 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
@@ -227,18 +227,20 @@ NVC0LegalizePostRA::findFirstUsesBB(
          continue;
 
       for (int d = 0; insn->defExists(d); ++d) {
+         const Value *def = insn->def(d).rep();
          if (insn->def(d).getFile() != FILE_GPR ||
-             insn->def(d).rep()->reg.data.id < minGPR ||
-             insn->def(d).rep()->reg.data.id > maxGPR)
+             def->reg.data.id + def->reg.size / 4 - 1 < minGPR ||
+             def->reg.data.id > maxGPR)
             continue;
          addTexUse(uses, insn, texi);
          return;
       }
 
       for (int s = 0; insn->srcExists(s); ++s) {
+         const Value *src = insn->src(s).rep();
          if (insn->src(s).getFile() != FILE_GPR ||
-             insn->src(s).rep()->reg.data.id < minGPR ||
-             insn->src(s).rep()->reg.data.id > maxGPR)
+             src->reg.data.id + src->reg.size / 4 - 1 < minGPR ||
+             src->reg.data.id > maxGPR)
             continue;
          addTexUse(uses, insn, texi);
          return;
-- 
2.7.3