Duncan P. N. Exon Smith 6eb8c34f72 IR: Fix ConstantExpr::replaceUsesOfWithOnConstant()
Change `ConstantExpr` to follow the model the other constants are using:
only malloc a replacement if it's going to be used.  This fixes a subtle
bug where if an API user had used `ConstantExpr::get()` already to
create the replacement but hadn't given it any users, we'd delete the
replacement.

This relies on r216015 to thread `OnlyIfReduced` through
`ConstantExpr::getWithOperands()`.

llvm-svn: 216016
2014-08-19 20:03:35 +00:00
..
2014-06-08 22:29:17 +00:00
2014-07-14 05:01:53 +00:00
2014-07-03 02:01:39 +00:00