Correct comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49913 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp
index 9bff72e37cc8ef329dfea237cb1993044c66ea55..6ad8bf54017537230ddbbfcbb1864d7d620bd9cf 100644 (file)
--- a/lib/CodeGen/SimpleRegisterCoalescing.cpp
+++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp
@@ -466,8 +466,8 @@ SimpleRegisterCoalescing::UpdateRegDefsUses(unsigned SrcReg, unsigned DstReg,
       O.setSubReg(0);
     } else {
       // Sub-register indexes goes from small to large. e.g.
-      // RAX: 0 -> AL, 1 -> AH, 2 -> AX, 3 -> EAX
-      // EAX: 0 -> AL, 1 -> AH, 2 -> AX
+      // RAX: 1 -> AL, 2 -> AX, 3 -> EAX
+      // EAX: 1 -> AL, 2 -> AX
       // So RAX's sub-register 2 is AX, RAX's sub-regsiter 3 is EAX, whose
       // sub-register 2 is also AX.
       if (SubIdx && OldSubIdx && SubIdx != OldSubIdx)