func (fr *frame) setBranchWeightMetadata(br llvm.Value, trueweight, falseweight uint64) {
mdprof := llvm.MDKindID("prof")
mdnode := llvm.MDNode([]llvm.Value{
llvm.MDString("branch_weights"),
llvm.ConstInt(llvm.Int32Type(), trueweight, false),
llvm.ConstInt(llvm.Int32Type(), falseweight, false),
})
br.SetMetadata(mdprof, mdnode)
}