| commit | 7e40f63428fbdf64fdea5aa84459d7b3072a9a65 | [log] [tgz] |
|---|---|---|
| author | Chris Lattner <sabre@nondot.org> | Sun Oct 17 21:25:56 2004 +0000 |
| committer | Chris Lattner <sabre@nondot.org> | Sun Oct 17 21:25:56 2004 +0000 |
| tree | f4078d4de9a3443ad5ad79511e28a68fa32b9d34 | |
| parent | 41b2dc4133b3673f5b1779aa712f39f037d3c63d [diff] |
When inserting PHI nodes, don't insert any phi nodes that are obviously unneccesary. This allows us to delete several hundred phi nodes of the form PHI(x,x,x,undef) from 253.perlbmk and probably other programs as well. This implements Mem2Reg/UndefValuesMerge.ll git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17098 91177308-0d34-0410-b5e6-96231b3b80d8