[FileCheck] Remove unneeded unique_ptr. NFC. (#123216)

Author: jayfoad

llvm/include/llvm/FileCheck/FileCheck.h

@@ -180,8 +180,7 @@ struct FileCheckString;
 class FileCheck {
   FileCheckRequest Req;
   std::unique_ptr<FileCheckPatternContext> PatternContext;
-  // C++17 TODO: make this a plain std::vector.
-  std::unique_ptr<std::vector<FileCheckString>> CheckStrings;
+  std::vector<FileCheckString> CheckStrings;
 
 public:
   explicit FileCheck(FileCheckRequest Req);

llvm/lib/FileCheck/FileCheck.cpp

@@ -1766,8 +1766,7 @@ void FileCheckPatternContext::createLineVariable() {
 }
 
 FileCheck::FileCheck(FileCheckRequest Req)
-    : Req(Req), PatternContext(std::make_unique<FileCheckPatternContext>()),
-      CheckStrings(std::make_unique<std::vector<FileCheckString>>()) {}
+    : Req(Req), PatternContext(std::make_unique<FileCheckPatternContext>()) {}
 
 FileCheck::~FileCheck() = default;
 
@@ -1916,7 +1915,7 @@ bool FileCheck::readCheckFile(
     // Verify that CHECK-NEXT/SAME/EMPTY lines have at least one CHECK line before them.
     if ((CheckTy == Check::CheckNext || CheckTy == Check::CheckSame ||
          CheckTy == Check::CheckEmpty) &&
-        CheckStrings->empty()) {
+        CheckStrings.empty()) {
       StringRef Type = CheckTy == Check::CheckNext
                            ? "NEXT"
                            : CheckTy == Check::CheckEmpty ? "EMPTY" : "SAME";
@@ -1934,8 +1933,8 @@ bool FileCheck::readCheckFile(
     }
 
     // Okay, add the string we captured to the output vector and move on.
-    CheckStrings->emplace_back(P, UsedPrefix, PatternLoc);
-    std::swap(DagNotMatches, CheckStrings->back().DagNotStrings);
+    CheckStrings.emplace_back(P, UsedPrefix, PatternLoc);
+    std::swap(DagNotMatches, CheckStrings.back().DagNotStrings);
     DagNotMatches = ImplicitNegativeChecks;
   }
 
@@ -1962,10 +1961,10 @@ bool FileCheck::readCheckFile(
   // Add an EOF pattern for any trailing --implicit-check-not/CHECK-DAG/-NOTs,
   // and use the first prefix as a filler for the error message.
   if (!DagNotMatches.empty()) {
-    CheckStrings->emplace_back(
+    CheckStrings.emplace_back(
         Pattern(Check::CheckEOF, PatternContext.get(), LineNumber + 1),
         *Req.CheckPrefixes.begin(), SMLoc::getFromPointer(Buffer.data()));
-    std::swap(DagNotMatches, CheckStrings->back().DagNotStrings);
+    std::swap(DagNotMatches, CheckStrings.back().DagNotStrings);
   }
 
   return false;
@@ -2676,13 +2675,13 @@ bool FileCheck::checkInput(SourceMgr &SM, StringRef Buffer,
                            std::vector<FileCheckDiag> *Diags) {
   bool ChecksFailed = false;
 
-  unsigned i = 0, j = 0, e = CheckStrings->size();
+  unsigned i = 0, j = 0, e = CheckStrings.size();
   while (true) {
     StringRef CheckRegion;
     if (j == e) {
       CheckRegion = Buffer;
     } else {
-      const FileCheckString &CheckLabelStr = (*CheckStrings)[j];
+      const FileCheckString &CheckLabelStr = CheckStrings[j];
       if (CheckLabelStr.Pat.getCheckTy() != Check::CheckLabel) {
         ++j;
         continue;
@@ -2708,7 +2707,7 @@ bool FileCheck::checkInput(SourceMgr &SM, StringRef Buffer,
       PatternContext->clearLocalVars();
 
     for (; i != j; ++i) {
-      const FileCheckString &CheckStr = (*CheckStrings)[i];
+      const FileCheckString &CheckStr = CheckStrings[i];
 
       // Check each string within the scanned region, including a second check
       // of any final CHECK-LABEL (to verify CHECK-NOT and CHECK-DAG)