From e87928a494a7cf0985a9d1cd78bda8729d17c614 Mon Sep 17 00:00:00 2001 From: Matt Turner Date: Wed, 28 Jan 2015 18:37:32 -0800 Subject: [PATCH] i965/fs: Add support for constant propagating into sources with modifiers. All but 16 of the programs helped were ARB fp programs. total instructions in shared programs: 5949286 -> 5945470 (-0.06%) instructions in affected programs: 275162 -> 271346 (-1.39%) helped: 1197 GAINED: 1 Reviewed-by: Jason Ekstrand --- .../dri/i965/brw_fs_copy_propagation.cpp | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp index 5dd72559298..68a266c7331 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_copy_propagation.cpp @@ -448,16 +448,22 @@ fs_visitor::try_constant_propagate(fs_inst *inst, acp_entry *entry) (entry->dst.reg_offset + entry->regs_written) * 32) continue; - /* Don't bother with cases that should have been taken care of by the - * GLSL compiler's constant folding pass. - */ - if (inst->src[i].negate || inst->src[i].abs) - continue; - fs_reg val = entry->src; val.effective_width = inst->src[i].effective_width; val.type = inst->src[i].type; + if (inst->src[i].abs) { + if (!brw_abs_immediate(val.type, &val.fixed_hw_reg)) { + continue; + } + } + + if (inst->src[i].negate) { + if (!brw_negate_immediate(val.type, &val.fixed_hw_reg)) { + continue; + } + } + switch (inst->opcode) { case BRW_OPCODE_MOV: case SHADER_OPCODE_LOAD_PAYLOAD: -- 2.30.2