[WebAssembly] Fix macro metaprogram to not duplicate code as much.

No functionality change intended.

llvm-svn: 325947

1 files changed, 11 insertions, 7 deletions

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.cpp
index d4d41520666..e2b518104d1 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.cpp
@@ -465,15 +465,19 @@ ManagedStatic<RuntimeLibcallSignatureTable> RuntimeLibcallSignatures;
 struct StaticLibcallNameMap {
   StringMap<RTLIB::Libcall> Map;
   StaticLibcallNameMap() {
-#define HANDLE_LIBCALL(code, name)                                    \
-  if ((const char *)name &&                                           \
-      RuntimeLibcallSignatures->Table[RTLIB::code] != unsupported) {  \
-    assert(Map.find(StringRef::withNullAsEmpty(name)) == Map.end() && \
-           "duplicate libcall names in name map");                    \
-    Map[StringRef::withNullAsEmpty(name)] = RTLIB::code;              \
-  }
+    static constexpr std::pair<const char *, RTLIB::Libcall> NameLibcalls[] = {
+#define HANDLE_LIBCALL(code, name) {(const char *)name, RTLIB::code},
 #include "llvm/CodeGen/RuntimeLibcalls.def"
 #undef HANDLE_LIBCALL
+    };
+    for (const auto &NameLibcall : NameLibcalls) {
+      if (NameLibcall.first != nullptr &&
+          RuntimeLibcallSignatures->Table[NameLibcall.second] != unsupported) {
+        assert(Map.find(NameLibcall.first) == Map.end() &&
+               "duplicate libcall names in name map");
+        Map[NameLibcall.first] = NameLibcall.second;
+      }
+    }
   }
 };