Change the definition of TargetRegisterInfo::getCrossCopyRegClass to be more

flexible.

If it returns a register class that's different from the input, then that's the
register class used for cross-register class copies.
If it returns a register class that's the same as the input, then no cross-
register class copies are needed (normal copies would do).
If it returns null, then it's not at all possible to copy registers of the
specified register class.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127368 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp
index fe98cac..1f464f4 100644
--- a/lib/Target/X86/X86RegisterInfo.cpp
+++ b/lib/Target/X86/X86RegisterInfo.cpp
@@ -337,7 +337,7 @@ X86RegisterInfo::getCrossCopyRegClass(const TargetRegisterClass *RC) const {
     else
       return &X86::GR32RegClass;
   }
-  return NULL;
+  return RC;
 }
 
 unsigned