diff options
| author | Samuel Pitoiset <samuel.pitoiset@gmail.com> | 2016-11-25 12:25:58 +0100 |
|---|---|---|
| committer | Samuel Pitoiset <samuel.pitoiset@gmail.com> | 2016-11-26 19:05:11 +0100 |
| commit | 8fdb800bdaa28f4ca563829f70e8b187f867c0ac (patch) | |
| tree | 8249cbff9d94cc12415a245abf060818957fe2a9 | |
| parent | 948cce01964c1dd7365c49381f9a6cf1b6e5f7f9 (diff) | |
gm107/ir: optimize 32-bit CONST load to mov
This is not allowed for indirect accesses because the source
GPR might be erased by a subsequent instruction (WaR hazard)
if we don't emit a read dep bar.
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
| -rw-r--r-- | src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_gm107.cpp | 16 | ||||
| -rw-r--r-- | src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_gm107.h | 1 |
2 files changed, 17 insertions, 0 deletions
diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_gm107.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_gm107.cpp index 84ef4e0fb7..371ebae40c 100644 --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_gm107.cpp +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_gm107.cpp @@ -61,6 +61,19 @@ GM107LegalizeSSA::handlePFETCH(Instruction *i) i->setSrc(1, NULL); } +void +GM107LegalizeSSA::handleLOAD(Instruction *i) +{ + if (i->src(0).getFile() != FILE_MEMORY_CONST) + return; + if (i->src(0).isIndirect(0)) + return; + if (typeSizeof(i->dType) != 4) + return; + + i->op = OP_MOV; +} + bool GM107LegalizeSSA::visit(Instruction *i) { @@ -68,6 +81,9 @@ GM107LegalizeSSA::visit(Instruction *i) case OP_PFETCH: handlePFETCH(i); break; + case OP_LOAD: + handleLOAD(i); + break; default: break; } diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_gm107.h b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_gm107.h index 81749bf57e..d0737beda6 100644 --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_gm107.h +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_gm107.h @@ -21,6 +21,7 @@ private: virtual bool visit(Instruction *); void handlePFETCH(Instruction *); + void handleLOAD(Instruction *); }; } // namespace nv50_ir |