tree e4bba8613607c38aa947509b4cf6f9e501af678a
parent cc95b57d42a4af1cbb0a0e4a4efc2133116dd21c
author Duncan Sands <baldrick@free.fr> 1339580533 +0000
committer Duncan Sands <baldrick@free.fr> 1339580533 +0000

When linearizing a multiplication, return at once if we see a factor of zero,
since then the entire expression must equal zero (similarly for other operations
with an absorbing element).  With this in place a bunch of reassociate code for
handling constants is dead since it is all taken care of when linearizing.  No
intended functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158398 91177308-0d34-0410-b5e6-96231b3b80d8