[llvm-bugs] [Bug 49179] New: Missing copysign(1., x) < 0. to std::signbit(x) fold

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=49179

            Bug ID: 49179
           Summary: Missing copysign(1., x) < 0. to std::signbit(x) fold
           Product: libraries
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: nok.raven at gmail.com
                CC: llvm-bugs at lists.llvm.org

#include <cmath>

bool foo(double x)
{
    return std::copysign(1., x) < 0.;
}

bool bar(double x)
{
    return std::signbit(x);
}

https://godbolt.org/z/xPMzj9

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