Compute a map from register names to registers, rather than scanning the list of registers every time we want to look up a register by name.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163659 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeGenTarget.cpp b/utils/TableGen/CodeGenTarget.cpp
index fa31c9f..6335cc5 100644
--- a/utils/TableGen/CodeGenTarget.cpp
+++ b/utils/TableGen/CodeGenTarget.cpp
@@ -199,12 +199,11 @@
/// getRegisterByName - If there is a register with the specific AsmName,
/// return it.
const CodeGenRegister *CodeGenTarget::getRegisterByName(StringRef Name) const {
- const std::vector<CodeGenRegister*> &Regs = getRegBank().getRegisters();
- for (unsigned i = 0, e = Regs.size(); i != e; ++i)
- if (Regs[i]->TheDef->getValueAsString("AsmName") == Name)
- return Regs[i];
-
- return 0;
+ const StringMap<CodeGenRegister*> &Regs = getRegBank().getRegistersByName();
+ StringMap<CodeGenRegister*>::const_iterator I = Regs.find(Name);
+ if (I == Regs.end())
+ return 0;
+ return I->second;
}
std::vector<MVT::SimpleValueType> CodeGenTarget::