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aco: fix extract_vector optimization

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If the allocated_vec map contains a different RegType
for the elements, ensure that the size matches exactly.

Otherwise, it could happen that extracting a dword
element matched with a subdword element.

No fossil-db changes.

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11823>
This commit is contained in:
Daniel Schürmann
2021-07-08 16:49:18 +02:00
parent 98136bda05
commit b97cd93b35
1 changed files with 2 additions and 3 deletions
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5
src/amd/compiler/aco_instruction_selection.cpp
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@@ -1329,9 +1329,8 @@ visit_alu_instr(isel_context* ctx, nir_alu_instr* instr)
RegClass elem_rc = RegClass::get(RegType::vgpr, instr->dest.dest.ssa.bit_size / 8u);
for (unsigned i = 0; i < num; ++i) {
if (elems[i].type() == RegType::sgpr && elem_rc.is_subdword())
vec->operands[i] = Operand(emit_extract_vector(ctx, elems[i], 0, elem_rc));
else
vec->operands[i] = Operand{elems[i]};
elems[i] = emit_extract_vector(ctx, elems[i], 0, elem_rc);
vec->operands[i] = Operand{elems[i]};
}
vec->definitions[0] = Definition(dst);
ctx->block->instructions.emplace_back(std::move(vec));