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irjit: Reserve some arrays that churn.

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Improves IR compile time by around 20-30%.
This commit is contained in:
Unknown W. Brackets 2023-08-19 22:36:35 -07:00
parent cd1c5beb60
commit 57123e8f9e
3 changed files with 13 additions and 0 deletions
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3
Core/MIPS/IR/IRInst.h
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@ -375,6 +375,9 @@ public:
int AddConstant(u32 value);
int AddConstantFloat(float value);
void Reserve(size_t s) {
insts_.reserve(s);
}
void Clear() {
insts_.clear();
}

1
Core/MIPS/IR/IRJit.cpp
View File

@ -168,6 +168,7 @@ void IRJit::CompileFunction(u32 start_address, u32 length) {
// We may go up and down from branches, so track all block starts done here.
std::set<u32> doneAddresses;
std::vector<u32> pendingAddresses;
pendingAddresses.reserve(16);
pendingAddresses.push_back(start_address);
while (!pendingAddresses.empty()) {
u32 em_address = pendingAddresses.back();

9
Core/MIPS/IR/IRPassSimplify.cpp
View File

@ -86,6 +86,8 @@ IROp ShiftToShiftImm(IROp op) {
}
bool IRApplyPasses(const IRPassFunc *passes, size_t c, const IRWriter &in, IRWriter &out, const IROptions &opts) {
out.Reserve(in.GetInstructions().size());
if (c == 1) {
return passes[0](in, out, opts);
}
@ -95,6 +97,7 @@ bool IRApplyPasses(const IRPassFunc *passes, size_t c, const IRWriter &in, IRWri
IRWriter temp[2];
const IRWriter *nextIn = &in;
IRWriter *nextOut = &temp[1];
temp[1].Reserve(nextIn->GetInstructions().size());
for (size_t i = 0; i < c - 1; ++i) {
if (passes[i](*nextIn, *nextOut, opts)) {
logBlocks = true;
@ -102,8 +105,12 @@ bool IRApplyPasses(const IRPassFunc *passes, size_t c, const IRWriter &in, IRWri
temp[0] = std::move(temp[1]);
nextIn = &temp[0];
temp[1].Clear();
temp[1].Reserve(nextIn->GetInstructions().size());
}
out.Reserve(nextIn->GetInstructions().size());
if (passes[c - 1](*nextIn, out, opts)) {
logBlocks = true;
}
@ -947,6 +954,8 @@ bool PurgeTemps(const IRWriter &in, IRWriter &out, const IROptions &opts) {
int8_t fplen = 0;
};
std::vector<Check> checks;
checks.reserve(insts.size() / 2);
// This tracks the last index at which each reg was modified.
int lastWrittenTo[256];
int lastReadFrom[256];