Add TargetRegisterInfo::getCoveringLanes().

This lane mask provides information about which register lanes
completely cover super-registers. See the block comment before
getCoveringLanes().

llvm-svn: 182034

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/TargetRegisterInfo.cpp b/llvm/lib/CodeGen/TargetRegisterInfo.cpp
index 84b4bfc3322..4c21daf07a5 100644
--- a/llvm/lib/CodeGen/TargetRegisterInfo.cpp
+++ b/llvm/lib/CodeGen/TargetRegisterInfo.cpp
@@ -23,10 +23,12 @@ using namespace llvm;
 TargetRegisterInfo::TargetRegisterInfo(const TargetRegisterInfoDesc *ID,
                              regclass_iterator RCB, regclass_iterator RCE,
                              const char *const *SRINames,
-                             const unsigned *SRILaneMasks)
+                             const unsigned *SRILaneMasks,
+                             unsigned SRICoveringLanes)
   : InfoDesc(ID), SubRegIndexNames(SRINames),
     SubRegIndexLaneMasks(SRILaneMasks),
-    RegClassBegin(RCB), RegClassEnd(RCE) {
+    RegClassBegin(RCB), RegClassEnd(RCE),
+    CoveringLanes(SRICoveringLanes) {
 }
 
 TargetRegisterInfo::~TargetRegisterInfo() {}