Re-land r335038 "[llvm-exegesis] A mechanism to add target-specific functionality.""
Fix typo: LLVM_NATIVE_ARCH -> LLVM_EXEGESIS_NATIVE_ARCH.
llvm-svn: 335041
diff --git a/llvm/tools/llvm-exegesis/lib/Target.cpp b/llvm/tools/llvm-exegesis/lib/Target.cpp
new file mode 100644
index 0000000..1b11f93
--- /dev/null
+++ b/llvm/tools/llvm-exegesis/lib/Target.cpp
@@ -0,0 +1,36 @@
+//===-- Target.cpp ----------------------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+#include "Target.h"
+
+namespace exegesis {
+
+ExegesisTarget::~ExegesisTarget() {} // anchor.
+
+static ExegesisTarget* FirstTarget = nullptr;
+
+const ExegesisTarget* ExegesisTarget::lookup(llvm::StringRef TT) {
+ const llvm::Triple::ArchType Arch = llvm::Triple(TT).getArch();
+ for (const ExegesisTarget* T = FirstTarget; T != nullptr; T = T->Next) {
+ if (T->matchesArch(Arch)) return T;
+ }
+ return nullptr;
+}
+
+void ExegesisTarget::registerTarget(ExegesisTarget *Target){
+ if (FirstTarget == nullptr) {
+ FirstTarget = Target;
+ return;
+ }
+ assert(Target->Next == nullptr && "target has already been registered");
+ if (Target->Next != nullptr)
+ return;
+ Target->Next = FirstTarget;
+ FirstTarget = Target;
+}
+} // namespace exegesis