From: Jason Ekstrand Date: Tue, 15 Jan 2019 16:53:44 +0000 (-0600) Subject: intel/fs: Do the grf127 hack on SIMD8 instructions in SIMD16 mode X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b4f0d062cd12b4f675bac900ac41d1085a79239a;p=mesa.git intel/fs: Do the grf127 hack on SIMD8 instructions in SIMD16 mode Previously, we only applied the fix to shaders with a dispatch mode of SIMD8 but the code it relies on for SIMD16 mode only applies to SIMD16 instructions. If you have a SIMD8 instruction in a SIMD16 shader, neither would trigger and the restriction could still be hit. Fixes: 232ed8980217dd "i965/fs: Register allocator shoudn't use grf127..." Reviewed-by: Jose Maria Casanova Crespo Reviewed-by: Kenneth Graunke --- diff --git a/src/intel/compiler/brw_fs_reg_allocate.cpp b/src/intel/compiler/brw_fs_reg_allocate.cpp index 6961cb1caf4..b3825f1ef8c 100644 --- a/src/intel/compiler/brw_fs_reg_allocate.cpp +++ b/src/intel/compiler/brw_fs_reg_allocate.cpp @@ -667,15 +667,14 @@ fs_visitor::assign_regs(bool allow_spilling, bool spill_all) * messages adding a node interference to the grf127_send_hack_node. * This node has a fixed asignment to grf127. * - * We don't apply it to SIMD16 because previous code avoids any register - * overlap between sources and destination. + * We don't apply it to SIMD16 instructions because previous code avoids + * any register overlap between sources and destination. */ ra_set_node_reg(g, grf127_send_hack_node, 127); - if (dispatch_width == 8) { - foreach_block_and_inst(block, fs_inst, inst, cfg) { - if (inst->is_send_from_grf() && inst->dst.file == VGRF) - ra_add_node_interference(g, inst->dst.nr, grf127_send_hack_node); - } + foreach_block_and_inst(block, fs_inst, inst, cfg) { + if (inst->exec_size < 16 && inst->is_send_from_grf() && + inst->dst.file == VGRF) + ra_add_node_interference(g, inst->dst.nr, grf127_send_hack_node); } if (spilled_any_registers) {