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aco: don't combine literals into v_cndmask_b32/v_subb/v_addc

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Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Fixes: 93c8ebfa ('aco: Initial commit of independent AMD compiler')
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
This commit is contained in:
Rhys Perry 2019-11-11 14:15:04 +00:00
parent d7b0d9a8d8
commit b062b92ab1
1 changed files with 6 additions and 0 deletions
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6
src/amd/compiler/aco_optimizer.cpp
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@ -481,6 +481,12 @@ bool can_accept_constant(aco_ptr<Instruction>& instr, unsigned operand)
bool valu_can_accept_literal(opt_ctx& ctx, aco_ptr<Instruction>& instr, unsigned operand)
{
/* instructions like v_cndmask_b32 can't take a literal because they always
* read SGPRs */
if (instr->operands.size() >= 3 &&
instr->operands[2].isTemp() && instr->operands[2].regClass().type() == RegType::sgpr)
return false;
// TODO: VOP3 can take a literal on GFX10
return !instr->isSDWA() && !instr->isDPP() && !instr->isVOP3() &&
operand == 0 && can_accept_constant(instr, operand);