From: Evan Cheng <evan.cheng@apple.com>
Date: Mon, 13 Oct 2008 17:30:56 +0000 (+0000)
Subject: Clarify meaning of copyRegToReg's return value.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=a6548d0f29d848ce5e2c10ebd6aae196ce3d8651;p=oota-llvm.git

Clarify meaning of copyRegToReg's return value.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57449 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/Target/TargetInstrInfo.h b/include/llvm/Target/TargetInstrInfo.h
index fcd0016ca09..510da1adfaf 100644
--- a/include/llvm/Target/TargetInstrInfo.h
+++ b/include/llvm/Target/TargetInstrInfo.h
@@ -220,7 +220,9 @@ public:
     return 0;
   }
   
-  /// copyRegToReg - Add a copy between a pair of registers
+  /// copyRegToReg - Emit instructions to copy between a pair of registers. It
+  /// returns false if the target does not how to copy between the specified
+  /// registers.
   virtual bool copyRegToReg(MachineBasicBlock &MBB,
                             MachineBasicBlock::iterator MI,
                             unsigned DestReg, unsigned SrcReg,