From f8012eb8267209fc9172cd30939e496caa401fd7 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper@gmail.com>
Date: Wed, 22 Apr 2015 02:09:45 +0000
Subject: [PATCH] [TableGen] Use 'isa' to identify UnsetInits rather than
 comparing with the singleton object created by UnsetInit::get(). Makes it
 more consistent with the other types.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235465 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/TableGen/Record.cpp               | 4 ++--
 utils/TableGen/CodeGenDAGPatterns.cpp | 2 +-
 utils/TableGen/DAGISelMatcherGen.cpp  | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/lib/TableGen/Record.cpp b/lib/TableGen/Record.cpp
index 3374432daa6..29217d74c96 100644
--- a/lib/TableGen/Record.cpp
+++ b/lib/TableGen/Record.cpp
@@ -517,7 +517,7 @@ std::string BitsInit::getAsString() const {
 // bits initializer will resolve into VarBitInit to keep the field name and bit
 // number used in targets with fixed insn length.
 static Init *fixBitInit(const RecordVal *RV, Init *Before, Init *After) {
-  if (RV || After != UnsetInit::get())
+  if (RV || !isa<UnsetInit>(After))
     return After;
   return Before;
 }
@@ -1961,7 +1961,7 @@ bool Record::getValueAsBitOrUnset(StringRef FieldName, bool &Unset) const {
     PrintFatalError(getLoc(), "Record `" + getName() +
       "' does not have a field named `" + FieldName.str() + "'!\n");
 
-  if (R->getValue() == UnsetInit::get()) {
+  if (isa<UnsetInit>(R->getValue())) {
     Unset = true;
     return false;
   }
diff --git a/utils/TableGen/CodeGenDAGPatterns.cpp b/utils/TableGen/CodeGenDAGPatterns.cpp
index 56743f3714a..2552050f678 100644
--- a/utils/TableGen/CodeGenDAGPatterns.cpp
+++ b/utils/TableGen/CodeGenDAGPatterns.cpp
@@ -2064,7 +2064,7 @@ TreePatternNode *TreePattern::ParseTreePattern(Init *TheInit, StringRef OpName){
   }
 
   // ?:$name or just $name.
-  if (TheInit == UnsetInit::get()) {
+  if (isa<UnsetInit>(TheInit)) {
     if (OpName.empty())
       error("'?' argument requires a name to match with operand list");
     TreePatternNode *Res = new TreePatternNode(TheInit, 1);
diff --git a/utils/TableGen/DAGISelMatcherGen.cpp b/utils/TableGen/DAGISelMatcherGen.cpp
index eb806192bdc..afc500351a9 100644
--- a/utils/TableGen/DAGISelMatcherGen.cpp
+++ b/utils/TableGen/DAGISelMatcherGen.cpp
@@ -220,7 +220,7 @@ void MatcherGen::EmitLeafMatchCode(const TreePatternNode *N) {
   }
 
   // An UnsetInit represents a named node without any constraints.
-  if (N->getLeafValue() == UnsetInit::get()) {
+  if (isa<UnsetInit>(N->getLeafValue())) {
     assert(N->hasName() && "Unnamed ? leaf");
     return;
   }
-- 
2.34.1