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CodeGen: Add forgotten a/-1 case

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Arseny Kapoulkine 2024-11-27 00:04:06 +09:00
parent fb56d8b0ec
commit 73c88c6b07
1 changed files with 2 additions and 0 deletions
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2
CodeGen/src/OptimizeConstProp.cpp
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@ -1224,6 +1224,8 @@ static void constPropInInst(ConstPropState& state, IrBuilder& build, IrFunction&
{
if (*k == 1.0) // a / 1.0 = a
substitute(function, inst, inst.a);
else if (*k == -1.0) // a / -1.0 = -a
replace(function, block, index, {IrCmd::UNM_NUM, inst.a});
else if (int exp = 0; frexp(*k, &exp) == 0.5 && exp >= -1000 && exp <= 1000) // a / 2^k = a * 2^-k
replace(function, block, index, {IrCmd::MUL_NUM, inst.a, build.constDouble(1.0 / *k)});
else