Commit Graph

6 Commits

Author SHA1 Message Date
Duncan Sands cca89124a2 Eliminate switch cases that can never match, for example removes all
negative switch cases if the branch condition is known to be positive.
Inspired by a recent improvement to GCC's VRP.

llvm-svn: 152405
2012-03-09 13:45:18 +00:00
Owen Anderson 8e7b73743d Update testcase since we're no longer doing the constant forwarding inline with correlated value propagation.
llvm-svn: 117712
2010-10-29 21:18:23 +00:00
Owen Anderson c91c1a205a Propagate non-local comparisons. Fixes PR1757.
llvm-svn: 113025
2010-09-03 22:47:08 +00:00
Owen Anderson c725462245 Add support for simplifying a load from a computed value to a load from a global when it
is provable that they're equivalent.  This fixes PR4855.

llvm-svn: 112994
2010-09-03 19:08:37 +00:00
Owen Anderson 50d8c8888c Add PR number to test.
llvm-svn: 112971
2010-09-03 16:58:25 +00:00
Owen Anderson 064b139c8d Rename test directory to reflect new pass name.
llvm-svn: 112592
2010-08-31 07:50:31 +00:00