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ConstProp: constant fold Neg

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will come up with rotate in the next patch

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
This commit is contained in:
Alyssa Rosenzweig 2024-03-29 17:08:59 -04:00
parent aa26b6288e
commit 6e92cc454d
1 changed files with 11 additions and 0 deletions
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11
FEXCore/Source/Interface/IR/Passes/ConstProp.cpp
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@ -865,6 +865,17 @@ bool ConstProp::ConstantPropagation(IREmitter *IREmit, const IRListView& Current
}
break;
}
case OP_NEG: {
auto Op = IROp->CW<IR::IROp_Neg>();
uint64_t Constant{};
if (IREmit->IsValueConstant(Op->Header.Args[0], &Constant)) {
uint64_t NewConstant = -Constant;
IREmit->ReplaceWithConstant(CodeNode, NewConstant);
Changed = true;
}
break;
}
case OP_LSHL: {
auto Op = IROp->CW<IR::IROp_Lshl>();
uint64_t Constant1{};