Teach the target parsing framework to directly compute the length of all

of its strings when expanding the string literals from the macros, and
push all of the APIs to be StringRef instead of C-string APIs.

This (remarkably) removes a very non-trivial number of strlen calls. It
even deletes code and complexity from one of the primary users -- Clang.

llvm-svn: 246374

1 files changed, 4 insertions, 4 deletions

diff --git a/llvm/lib/Support/Triple.cpp b/llvm/lib/Support/Triple.cpp
index 86b2d31..00a8f61 100644
--- a/llvm/lib/Support/Triple.cpp
+++ b/llvm/lib/Support/Triple.cpp
@@ -1290,7 +1290,7 @@ Triple Triple::getLittleEndianArchVariant() const {
   return T;
 }
 
-const char *Triple::getARMCPUForArch(StringRef MArch) const {
+StringRef Triple::getARMCPUForArch(StringRef MArch) const {
   if (MArch.empty())
     MArch = getArchName();
   MArch = ARM::getCanonicalArchName(MArch);
@@ -1310,10 +1310,10 @@ const char *Triple::getARMCPUForArch(StringRef MArch) const {
   }
 
   if (MArch.empty())
-    return nullptr;
+    return StringRef();
 
-  const char *CPU = ARM::getDefaultCPU(MArch);
-  if (CPU)
+  StringRef CPU = ARM::getDefaultCPU(MArch);
+  if (!CPU.empty())
     return CPU;
 
   // If no specific architecture version is requested, return the minimum CPU