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aco/ra: omit VCC affinity on VOPC_SDWA for GFX9+ 

VOPC_SDWA can also use arbitrary SGPR pairs on GFX9+.

Totals from 5607 (4.16% of 134913) affected shaders: (GFX10.3)
CodeSize: 42470760 -> 42452988 (-0.04%)
Instrs: 7943174 -> 7942883 (-0.00%)
Latency: 102887029 -> 102886305 (-0.00%); split: -0.00%, +0.00%
InvThroughput: 20454456 -> 20454338 (-0.00%); split: -0.00%, +0.00%
Copies: 376818 -> 376865 (+0.01%); split: -0.00%, +0.01%

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15408>
This commit is contained in:
Daniel Schürmann 2022-03-15 13:06:48 +01:00 committed by Marge Bot
parent 6ebc61d71b
commit 415a3820fc
1 changed files with 2 additions and 1 deletions
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3
src/amd/compiler/aco_register_allocation.cpp
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@ -2394,7 +2394,8 @@ get_affinities(ra_ctx& ctx, std::vector<IDSet>& live_out_per_block)
instr->operands[0].isFirstKillBeforeDef()) {
ctx.split_vectors[instr->operands[0].tempId()] = instr.get();
} else if (instr->isVOPC() && !instr->isVOP3()) {
ctx.assignments[instr->definitions[0].tempId()].vcc = true;
if (!instr->isSDWA() || ctx.program->chip_class == GFX8)
ctx.assignments[instr->definitions[0].tempId()].vcc = true;
} else if (instr->isVOP2() && !instr->isVOP3()) {
if (instr->operands.size() == 3 && instr->operands[2].isTemp() &&
instr->operands[2].regClass().type() == RegType::sgpr)