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freedreno/ir3/ra: move regs_count==0 check

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Fold it in to writes_gpr() (since a register that does not reference any
registers by definition does not write a register).  This lets us avoid
having to handle this case in a few other places.

Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Rob Clark 2019-10-23 09:50:22 -07:00 • committed by Rob Clark
parent bd21c73d3f
commit 8b92052f10
1 changed files with 2 additions and 9 deletions
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11
src/freedreno/ir3/ir3_ra.c
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@ -388,6 +388,8 @@ writes_gpr(struct ir3_instruction *instr)
{
if (is_store(instr))
return false;
if (instr->regs_count == 0)
return false;
/* is dest a normal temp register: */
struct ir3_register *reg = instr->regs[0];
if (reg->flags & (IR3_REG_CONST | IR3_REG_IMMED))
@ -586,9 +588,6 @@ ra_block_name_instructions(struct ir3_ra_ctx *ctx, struct ir3_block *block)
ctx->instr_cnt++;
if (instr->regs_count == 0)
continue;
if (!writes_gpr(instr))
continue;
@ -706,9 +705,6 @@ ra_block_compute_live_ranges(struct ir3_ra_ctx *ctx, struct ir3_block *block)
struct ir3_instruction *src;
struct ir3_register *reg;
if (instr->regs_count == 0)
continue;
/* There are a couple special cases to deal with here:
*
* fanout: used to split values from a higher class to a lower
@ -1069,9 +1065,6 @@ ra_block_alloc(struct ir3_ra_ctx *ctx, struct ir3_block *block)
list_for_each_entry (struct ir3_instruction, instr, &block->instr_list, node) {
struct ir3_register *reg;
if (instr->regs_count == 0)
continue;
if (writes_gpr(instr)) {
reg_assign(ctx, instr->regs[0], instr);
if (instr->regs[0]->flags & IR3_REG_HALF)