[LLVM][TableGen] Simplify `DagInit::get` (#140056)

- Add `DagInit::get` overloads that do not need ValName to be specified.
- Fix some calls to either not create temporary arrays for DAG args or
use the std::pair<> overload.

1 files changed, 3 insertions, 9 deletions

diff --git a/llvm/utils/TableGen/Common/CodeGenDAGPatterns.cpp b/llvm/utils/TableGen/Common/CodeGenDAGPatterns.cpp
index b6bc528..45f1446 100644
--- a/llvm/utils/TableGen/Common/CodeGenDAGPatterns.cpp
+++ b/llvm/utils/TableGen/Common/CodeGenDAGPatterns.cpp
@@ -2906,11 +2906,7 @@ TreePatternNodePtr TreePattern::ParseTreePattern(const Init *TheInit,
     // TreePatternNode of its own.  For example:
     ///   (foo GPR, imm) -> (foo GPR, (imm))
     if (R->isSubClassOf("SDNode") || R->isSubClassOf("PatFrags"))
-      return ParseTreePattern(
-          DagInit::get(
-              DI, nullptr,
-              std::vector<std::pair<const Init *, const StringInit *>>()),
-          OpName);
+      return ParseTreePattern(DagInit::get(DI, {}), OpName);
 
     // Input argument?
     TreePatternNodePtr Res = makeIntrusiveRefCnt<TreePatternNode>(DI, 1);
@@ -3413,10 +3409,8 @@ void CodeGenDAGPatterns::ParseDefaultOperands() {
 
     // Clone the DefaultInfo dag node, changing the operator from 'ops' to
     // SomeSDnode so that we can parse this.
-    std::vector<std::pair<const Init *, const StringInit *>> Ops;
-    for (unsigned op = 0, e = DefaultInfo->getNumArgs(); op != e; ++op)
-      Ops.emplace_back(DefaultInfo->getArg(op), DefaultInfo->getArgName(op));
-    const DagInit *DI = DagInit::get(SomeSDNode, nullptr, Ops);
+    const DagInit *DI = DagInit::get(SomeSDNode, DefaultInfo->getArgs(),
+                                     DefaultInfo->getArgNames());
 
     // Create a TreePattern to parse this.
     TreePattern P(DefaultOps[i], DI, false, *this);