From 7f19e293055d2a9897df803efa310c293280ab8f Mon Sep 17 00:00:00 2001 From: Ilia Mirkin Date: Fri, 29 Jan 2016 18:23:21 -0500 Subject: [PATCH] nv50/ir: get rid of memory stores with nop values This happens especially with exports and varying packing, where the last bits aren't always filled in. We end up trying to do quad-wide stores, which ends up being a lot of register moves that carefully preserve the nop value. Instead don't do the stores. total instructions in shared programs : 6131375 -> 6125267 (-0.10%) total gprs used in shared programs : 910139 -> 895501 (-1.61%) total local used in shared programs : 15328 -> 15328 (0.00%) local gpr inst helped 0 7442 4693 hurt 0 90 2687 Most of the helped/hurt instruction changes are by one or two ops because can no longer do quad-wide stores in all cases. Signed-off-by: Ilia Mirkin --- src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp index 81ee111..05b8db4 100644 --- a/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp +++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_peephole.cpp @@ -2533,6 +2533,12 @@ MemoryOpt::runOpt(BasicBlock *bb) } } else if (ldst->op == OP_STORE || ldst->op == OP_EXPORT) { + if (typeSizeof(ldst->dType) == 4 && + ldst->src(1).getFile() == FILE_GPR && + ldst->getSrc(1)->getInsn()->op == OP_NOP) { + delete_Instruction(prog, ldst); + continue; + } isLoad = false; } else { // TODO: maybe have all fixed ops act as barrier ? -- 2.7.4