From 8fcee858d595f3666e0fc828cce0286342c1d71e Mon Sep 17 00:00:00 2001 From: Rob Clark Date: Fri, 10 Nov 2017 12:54:49 -0500 Subject: [PATCH] freedreno/ir3: don't create split/fo if only writing .x In case an instruction only writes one register, and it is .x, we can skip the extra level of fanout indirection. Signed-off-by: Rob Clark --- src/gallium/drivers/freedreno/ir3/ir3_compiler_nir.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/src/gallium/drivers/freedreno/ir3/ir3_compiler_nir.c b/src/gallium/drivers/freedreno/ir3/ir3_compiler_nir.c index 3fd2e50d82f..1e883926386 100644 --- a/src/gallium/drivers/freedreno/ir3/ir3_compiler_nir.c +++ b/src/gallium/drivers/freedreno/ir3/ir3_compiler_nir.c @@ -747,6 +747,12 @@ split_dest(struct ir3_block *block, struct ir3_instruction **dst, struct ir3_instruction *src, unsigned base, unsigned n) { struct ir3_instruction *prev = NULL; + + if ((n == 1) && (src->regs[0]->wrmask == 0x1)) { + dst[0] = src; + return; + } + for (int i = 0, j = 0; i < n; i++) { struct ir3_instruction *split = ir3_instr_create(block, OPC_META_FO); ir3_reg_create(split, 0, IR3_REG_SSA); -- 2.30.2