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[CodeGen] Use std::lcm (NFC)

This commit is contained in:
Kazu Hirata 2022-09-03 11:17:33 -07:00
parent a0c7ca8ad4
commit bc96b36a41
1 changed files with 2 additions and 17 deletions
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19
llvm/lib/CodeGen/TargetSchedule.cpp
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@ -26,6 +26,7 @@
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <numeric>
using namespace llvm;
@ -43,22 +44,6 @@ bool TargetSchedModel::hasInstrItineraries() const {
return EnableSchedItins && !InstrItins.isEmpty();
}
static unsigned gcd(unsigned Dividend, unsigned Divisor) {
// Dividend and Divisor will be naturally swapped as needed.
while (Divisor) {
unsigned Rem = Dividend % Divisor;
Dividend = Divisor;
Divisor = Rem;
};
return Dividend;
}
static unsigned lcm(unsigned A, unsigned B) {
unsigned LCM = (uint64_t(A) * B) / gcd(A, B);
assert((LCM >= A && LCM >= B) && "LCM overflow");
return LCM;
}
void TargetSchedModel::init(const TargetSubtargetInfo *TSInfo) {
STI = TSInfo;
SchedModel = TSInfo->getSchedModel();
@ -71,7 +56,7 @@ void TargetSchedModel::init(const TargetSubtargetInfo *TSInfo) {
for (unsigned Idx = 0; Idx < NumRes; ++Idx) {
unsigned NumUnits = SchedModel.getProcResource(Idx)->NumUnits;
if (NumUnits > 0)
ResourceLCM = lcm(ResourceLCM, NumUnits);
ResourceLCM = std::lcm(ResourceLCM, NumUnits);
}
MicroOpFactor = ResourceLCM / SchedModel.IssueWidth;
for (unsigned Idx = 0; Idx < NumRes; ++Idx) {