Add initial support for variants. This just parses the new format, no
functionality is added
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16636 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeGenTarget.cpp b/utils/TableGen/CodeGenTarget.cpp
index f7225f0..4c882ad 100644
--- a/utils/TableGen/CodeGenTarget.cpp
+++ b/utils/TableGen/CodeGenTarget.cpp
@@ -16,8 +16,14 @@
#include "CodeGenTarget.h"
#include "Record.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/CommandLine.h"
using namespace llvm;
+static cl::opt<unsigned>
+AsmWriterNum("asmwriternum", cl::init(0),
+ cl::desc("Make -gen-asm-writer emit assembly writer #N"));
+
/// getValueType - Return the MCV::ValueType that the specified TableGen record
/// corresponds to.
MVT::ValueType llvm::getValueType(Record *Rec) {
@@ -100,7 +106,12 @@
/// getAsmWriter - Return the AssemblyWriter definition for this target.
///
Record *CodeGenTarget::getAsmWriter() const {
- return TargetRec->getValueAsDef("AssemblyWriter");
+ ListInit *LI = TargetRec->getValueAsListInit("AssemblyWriters");
+ if (AsmWriterNum >= LI->getSize())
+ throw "Target does not have an AsmWriter #" + utostr(AsmWriterNum) + "!";
+ DefInit *DI = dynamic_cast<DefInit*>(LI->getElement(AsmWriterNum));
+ if (!DI) throw std::string("AssemblyWriter list should be a list of defs!");
+ return DI->getDef();
}
void CodeGenTarget::ReadRegisters() const {