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aco: don't propagate vgprs into v_readlane/v_writelane

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Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Fixes: 93c8ebfa ('aco: Initial commit of independent AMD compiler')
(cherry picked from commit 2c98d79d11)
This commit is contained in:
Rhys Perry 2019-11-12 15:53:15 +00:00 • committed by Dylan Baker
parent 1b8f93550a
commit 001e7305ab
1 changed files with 8 additions and 1 deletions
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9
src/amd/compiler/aco_optimizer.cpp
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@ -474,6 +474,13 @@ bool valu_can_accept_literal(opt_ctx& ctx, aco_ptr<Instruction>& instr, unsigned
operand == 0 && can_accept_constant(instr, operand);
}
bool valu_can_accept_vgpr(aco_ptr<Instruction>& instr, unsigned operand)
{
if (instr->opcode == aco_opcode::v_readlane_b32 || instr->opcode == aco_opcode::v_writelane_b32)
return operand != 1;
return true;
}
bool parse_base_offset(opt_ctx &ctx, Instruction* instr, unsigned op_index, Temp *base, uint32_t *offset)
{
Operand op = instr->operands[op_index];
@ -576,7 +583,7 @@ void label_instruction(opt_ctx &ctx, aco_ptr<Instruction>& instr)
/* VALU: propagate neg, abs & inline constants */
else if (instr->isVALU()) {
if (info.is_temp() && info.temp.type() == RegType::vgpr) {
if (info.is_temp() && info.temp.type() == RegType::vgpr && valu_can_accept_vgpr(instr, i)) {
instr->operands[i].setTemp(info.temp);
info = ctx.info[info.temp.id()];
}