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GH-135379: Support limited scalar replacement for replicated uops in the JIT code generator. (GH-135563)

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* Use it to support efficient specializations of COPY and SWAP in the JIT.
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Mark Shannon 2025-06-17 13:43:09 +01:00 • committed by GitHub
parent a9e66a7c50
commit 8dd8b5c2f0
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9 changed files with 313 additions and 198 deletions
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Python/bytecodes.c
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@ -4946,8 +4946,7 @@ dummy_func(
res = PyStackRef_FromPyObjectSteal(res_o);
}
pure inst(COPY, (bottom, unused[oparg-1] -- bottom, unused[oparg-1], top)) {
assert(oparg > 0);
pure replicate(1:4) inst(COPY, (bottom, unused[oparg-1] -- bottom, unused[oparg-1], top)) {
top = PyStackRef_DUP(bottom);
}
@ -4980,12 +4979,11 @@ dummy_func(
macro(BINARY_OP) = _SPECIALIZE_BINARY_OP + unused/4 + _BINARY_OP;
pure inst(SWAP, (bottom, unused[oparg-2], top --
pure replicate(2:4) inst(SWAP, (bottom, unused[oparg-2], top --
bottom, unused[oparg-2], top)) {
_PyStackRef temp = bottom;
bottom = top;
top = temp;
assert(oparg >= 2);
}
inst(INSTRUMENTED_LINE, ( -- )) {