llvm/llvm-project
GitHub で見るscalbln(x, n), scalbn(x, n), ldexp(x, n) are not folded at the compilation time when (x, n) is constant
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#112,631 opened on 2024年10月16日
floating-pointgood first issuellvm:optimizationsmissed-optimization
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説明
Consider the following example. https://godbolt.org/z/54xsG8WTr
#include <cmath>
double f1() {
return std::scalbln(3.0, 4);
}
double f2() {
return std::scalbn(3.0, 4);
}
double f3() {
return std::ldexp(3.0, 4);
}