Add support for pointer types in patterns

Summary:
This adds support for defining patterns for global isel using pointer
types, for example:

def : Pat<(load GPR32:$src),
          (p1 (LOAD GPR32:$src))>;

DAGISelEmitter will ignore the pointer information and treat these
types as integers with the same bit-width as the pointer type.

Reviewers: dsanders, rtereshin, arsenm

Reviewed By: arsenm

Subscribers: Petar.Avramovic, wdng, rovka, kristof.beyls, jfb, volkan, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D57065

llvm-svn: 354510

1 files changed, 3 insertions, 0 deletions

diff --git a/llvm/utils/TableGen/GlobalISelEmitter.cpp b/llvm/utils/TableGen/GlobalISelEmitter.cpp
index 8079e2989b6..1e71d1317ed 100644
--- a/llvm/utils/TableGen/GlobalISelEmitter.cpp
+++ b/llvm/utils/TableGen/GlobalISelEmitter.cpp
@@ -1513,6 +1513,9 @@ Error OperandMatcher::addTypeCheckPredicate(const TypeSetByHwMode &VTy,
 
   if (OperandIsAPointer)
     addPredicate<PointerToAnyOperandMatcher>(OpTyOrNone->get().getSizeInBits());
+  else if (VTy.isPointer())
+    addPredicate<LLTOperandMatcher>(LLT::pointer(VTy.getPtrAddrSpace(),
+                                                 OpTyOrNone->get().getSizeInBits()));
   else
     addPredicate<LLTOperandMatcher>(*OpTyOrNone);
   return Error::success();