[globalisel][tablegen] Generalize pointer-type inference by introducing ptypeN. NFC
ptypeN is functionally the same as typeN except that it informs the
SelectionDAG importer that an operand should be treated as a pointer even
if it was written as iN. This is important for patterns that use iN instead
of iPTR to represent pointers. E.g.:
(set GPR64:$dst, (load GPR64:$addr))
Previously, this was handled as a hardcoded special case for the appropriate
operands to G_LOAD and G_STORE.
llvm-svn: 318574
diff --git a/llvm/utils/TableGen/CodeGenInstruction.h b/llvm/utils/TableGen/CodeGenInstruction.h
index e173e15..9cff95b 100644
--- a/llvm/utils/TableGen/CodeGenInstruction.h
+++ b/llvm/utils/TableGen/CodeGenInstruction.h
@@ -284,6 +284,12 @@
/// include text from the specified variant, returning the new string.
static std::string FlattenAsmStringVariants(StringRef AsmString,
unsigned Variant);
+
+ // Is the specified operand in a generic instruction implicitly a pointer.
+ // This can be used on intructions that use typeN or ptypeN to identify
+ // operands that should be considered as pointers even though SelectionDAG
+ // didn't make a distinction between integer and pointers.
+ bool isOperandAPointer(unsigned i) const;
};