I was just laughing about how I heard this phrase pronounced the other day. I had found a torrent of Irish songs, many of them rebel tunes. SAM Song by Éire Óg was all in English, except for one line in which I swear I heard "Chucky ár lá, sing up the 'RA!" I figured I'd heard "tiocfaidh", as I was familiar with the phrase. Since I'm a beginner at Gaeilge, still getting used to the difference between spelling and pronunciation in various dialects, I went to Triskelle's excellent lyrics area to make sure.
http://www.triskelle.eu/music/lyrics.php?index=080.010 Someday my listening comprehension will come. ;)