[globalisel][tablegen] Add support for RegisterOperand.

Summary:
It functions just like RegisterClass except that the class is obtained
from a field.

Depends on D31761.

Reviewers: ab, qcolombet, t.p.northover, rovka, kristof.beyls, aditya_nandakumar

Reviewed By: ab

Subscribers: dberris, llvm-commits, igorb

Differential Revision: https://reviews.llvm.org/D32229

llvm-svn: 301080

1 files changed, 10 insertions, 1 deletions

diff --git a/llvm/utils/TableGen/GlobalISelEmitter.cpp b/llvm/utils/TableGen/GlobalISelEmitter.cpp
index b637114a2e0..e2b120e1347 100644
--- a/llvm/utils/TableGen/GlobalISelEmitter.cpp
+++ b/llvm/utils/TableGen/GlobalISelEmitter.cpp
@@ -1384,6 +1384,12 @@ Error GlobalISelEmitter::importChildMatcher(InstructionMatcher &InsnMatcher,
       return Error::success();
     }
 
+    if (ChildRec->isSubClassOf("RegisterOperand")) {
+      OM.addPredicate<RegisterBankOperandMatcher>(
+          Target.getRegisterClass(ChildRec->getValueAsDef("RegClass")));
+      return Error::success();
+    }
+
     // Check for ComplexPattern's.
     if (ChildRec->isSubClassOf("ComplexPattern")) {
       const auto &ComplexPattern = ComplexPatternEquivs.find(ChildRec);
@@ -1447,7 +1453,8 @@ Error GlobalISelEmitter::importExplicitUseRenderer(
       return Error::success();
     }
 
-    if (ChildRec->isSubClassOf("RegisterClass")) {
+    if (ChildRec->isSubClassOf("RegisterClass") ||
+        ChildRec->isSubClassOf("RegisterOperand")) {
       DstMIBuilder.addRenderer<CopyRenderer>(InsnMatcher, DstChild->getName());
       return Error::success();
     }
@@ -1614,6 +1621,8 @@ Expected<RuleMatcher> GlobalISelEmitter::runOnPattern(const PatternToMatch &P) {
 
     const auto &DstIOperand = DstI.Operands[OpIdx];
     Record *DstIOpRec = DstIOperand.Rec;
+    if (DstIOpRec->isSubClassOf("RegisterOperand"))
+      DstIOpRec = DstIOpRec->getValueAsDef("RegClass");
     if (!DstIOpRec->isSubClassOf("RegisterClass"))
       return failedImport("Dst MI def isn't a register class");