diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vec4.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vec4.cpp b/src/mesa/drivers/dri/i965/brw_vec4.cpp index ed49cd38987..6e52d79e053 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4.cpp @@ -1021,6 +1021,28 @@ vec4_visitor::opt_register_coalesce() inst->src[0].abs || inst->src[0].negate || inst->src[0].reladdr) continue; + /* Remove no-op MOVs */ + if (inst->dst.file == inst->src[0].file && + inst->dst.reg == inst->src[0].reg && + inst->dst.reg_offset == inst->src[0].reg_offset) { + bool is_nop_mov = true; + + for (unsigned c = 0; c < 4; c++) { + if ((inst->dst.writemask & (1 << c)) == 0) + continue; + + if (BRW_GET_SWZ(inst->src[0].swizzle, c) != c) { + is_nop_mov = false; + break; + } + } + + if (is_nop_mov) { + inst->remove(block); + continue; + } + } + bool to_mrf = (inst->dst.file == MRF); /* Can't coalesce this GRF if someone else was going to |