Mesa (master): nvc0/ir: safen up lowering logic against overwriting reused values
Ilia Mirkin
imirkin at kemper.freedesktop.org
Sun Jan 7 16:43:44 UTC 2018
Module: Mesa
Branch: master
Commit: 7f92c8ee3709b7e229321636ee15b6b7571fe3ea
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=7f92c8ee3709b7e229321636ee15b6b7571fe3ea
Author: Ilia Mirkin <imirkin at alum.mit.edu>
Date: Sat Apr 8 00:05:18 2017 -0400
nvc0/ir: safen up lowering logic against overwriting reused values
I'm fairly sure both of the changed sites are OK as-is, but they're
fragile, so this is just safening them up. Since this is happening
pre-ssa, we don't want to be overwriting values that may potentially get
used later on.
Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---
src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp | 6 ++++--
1 file changed, 4 insertions(+), 2 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 51f6fae2c1..8a864079ce 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
@@ -1046,9 +1046,11 @@ NVC0LoweringPass::handleTEX(TexInstruction *i)
if (chipset >= NVISA_GM107_CHIPSET)
s += dim;
if (i->tex.target.isArray()) {
- bld.mkOp3(OP_INSBF, TYPE_U32, i->getSrc(s),
+ Value *offset = bld.getScratch();
+ bld.mkOp3(OP_INSBF, TYPE_U32, offset,
bld.loadImm(NULL, imm), bld.mkImm(0xc10),
i->getSrc(s));
+ i->setSrc(s, offset);
} else {
i->moveSources(s, 1);
i->setSrc(s, bld.loadImm(NULL, imm << 16));
@@ -2457,7 +2459,7 @@ NVC0LoweringPass::handleLDST(Instruction *i)
// Clamp the UBO index when an indirect access is used to avoid
// loading information from the wrong place in the driver cb.
// TODO - synchronize the max with the driver.
- ind = bld.mkOp2v(OP_MIN, TYPE_U32, ind,
+ ind = bld.mkOp2v(OP_MIN, TYPE_U32, bld.getSSA(),
bld.mkOp2v(OP_ADD, TYPE_U32, bld.getSSA(),
ind, bld.loadImm(NULL, fileIndex)),
bld.loadImm(NULL, 13));
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