[NFC] fix trivial typos in comments and documents
"to to" -> "to"
llvm-svn: 323628
diff --git a/llvm/lib/Transforms/Scalar/GVNHoist.cpp b/llvm/lib/Transforms/Scalar/GVNHoist.cpp
index 026fab5..214855d 100644
--- a/llvm/lib/Transforms/Scalar/GVNHoist.cpp
+++ b/llvm/lib/Transforms/Scalar/GVNHoist.cpp
@@ -570,7 +570,7 @@
// The ides is inspired from:
// "Partial Redundancy Elimination in SSA Form"
// ROBERT KENNEDY, SUN CHAN, SHIN-MING LIU, RAYMOND LO, PENG TU and FRED CHOW
- // They use similar idea in the forward graph to to find fully redundant and
+ // They use similar idea in the forward graph to find fully redundant and
// partially redundant expressions, here it is used in the inverse graph to
// find fully anticipable instructions at merge point (post-dominator in
// the inverse CFG).