commit 05d96f98cbd96dab7f4ea1ea4ebe4285597e7e88
author Benjamin Kramer <benny.kra@googlemail.com> Wed Aug 22 15:37:57 2012 +0000
committer Benjamin Kramer <benny.kra@googlemail.com> Wed Aug 22 15:37:57 2012 +0000
tree b32c92e060826c319744e00e4f74a20de33ad62f
parent fdeb9fe5e08146d9cb953000cb893eda80329a08

Reduce duplicated hash map lookups.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162362 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/BranchFolding.cpp

diff --git a/lib/CodeGen/BranchFolding.cpp b/lib/CodeGen/BranchFolding.cpp
index fb65bb7..7df0e15 100644
--- a/lib/CodeGen/BranchFolding.cpp
+++ b/lib/CodeGen/BranchFolding.cpp
@@ -1554,8 +1554,7 @@
       for (MCRegAliasIterator AI(Reg, TRI, true); AI.isValid(); ++AI)
         Uses.insert(*AI);
     } else {
-      if (Uses.count(Reg)) {
-        Uses.erase(Reg);
+      if (Uses.erase(Reg)) {
         for (MCSubRegIterator SubRegs(Reg, TRI); SubRegs.isValid(); ++SubRegs)
           Uses.erase(*SubRegs); // Use sub-registers to be conservative
       }