Add isExtractSubreg property.

This patch adds a new property: isExtractSubreg and the related target hooks:
TargetIntrInfo::getExtractSubregInputs and
TargetInstrInfo::getExtractSubregLikeInputs to specify that a target specific
instruction is a (kind of) EXTRACT_SUBREG.

The approach is similar to r215394.

<rdar://problem/12702965>

llvm-svn: 216130

1 files changed, 1 insertions, 0 deletions

diff --git a/llvm/utils/TableGen/CodeGenInstruction.h b/llvm/utils/TableGen/CodeGenInstruction.h
index e0a9044dbfa..649fbc29ce7 100644
--- a/llvm/utils/TableGen/CodeGenInstruction.h
+++ b/llvm/utils/TableGen/CodeGenInstruction.h
@@ -254,6 +254,7 @@ namespace llvm {
     bool isCodeGenOnly : 1;
     bool isPseudo : 1;
     bool isRegSequence : 1;
+    bool isExtractSubreg : 1;
 
     std::string DeprecatedReason;
     bool HasComplexDeprecationPredicate;