[llvm] r300735 - [tblgen] GCC/MS builtin to target intrisics map.

[Aditya Nandakumar via llvm-commits]

Author: aditya_nandakumar
Date: Wed Apr 19 14:14:20 2017
New Revision: 300735

URL: http://llvm.org/viewvc/llvm-project?rev=300735&view=rev
Log:
[tblgen] GCC/MS builtin to target intrisics map.

Patch by Ettore Speziale

Allow TableGen to generate static functions to perform GCC/MS builtin name to
target specific intrinsic ID mapping.

https://reviews.llvm.org/D31150

Modified:
    llvm/trunk/include/llvm/TableGen/StringToOffsetTable.h
    llvm/trunk/utils/TableGen/IntrinsicEmitter.cpp

Modified: llvm/trunk/include/llvm/TableGen/StringToOffsetTable.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/TableGen/StringToOffsetTable.h?rev=300735&r1=300734&r2=300735&view=diff
==============================================================================
--- llvm/trunk/include/llvm/TableGen/StringToOffsetTable.h (original)
+++ llvm/trunk/include/llvm/TableGen/StringToOffsetTable.h Wed Apr 19 14:14:20 2017
@@ -27,6 +27,8 @@ class StringToOffsetTable {
   std::string AggregateString;
 
 public:
+  bool Empty() const { return StringOffset.empty(); }
+
   unsigned GetOrAddStringOffset(StringRef Str, bool appendZero = true) {
     auto IterBool =
         StringOffset.insert(std::make_pair(Str, AggregateString.size()));

Modified: llvm/trunk/utils/TableGen/IntrinsicEmitter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/TableGen/IntrinsicEmitter.cpp?rev=300735&r1=300734&r2=300735&view=diff
==============================================================================
--- llvm/trunk/utils/TableGen/IntrinsicEmitter.cpp (original)
+++ llvm/trunk/utils/TableGen/IntrinsicEmitter.cpp Wed Apr 19 14:14:20 2017
@@ -84,14 +84,11 @@ void IntrinsicEmitter::run(raw_ostream &
   // Emit the intrinsic parameter attributes.
   EmitAttributes(Ints, OS);
 
-  // Individual targets don't need GCC builtin name mappings.
-  if (!TargetOnly) {
-    // Emit code to translate GCC builtins into LLVM intrinsics.
-    EmitIntrinsicToBuiltinMap(Ints, true, OS);
+  // Emit code to translate GCC builtins into LLVM intrinsics.
+  EmitIntrinsicToBuiltinMap(Ints, true, OS);
 
-    // Emit code to translate MS builtins into LLVM intrinsics.
-    EmitIntrinsicToBuiltinMap(Ints, false, OS);
-  }
+  // Emit code to translate MS builtins into LLVM intrinsics.
+  EmitIntrinsicToBuiltinMap(Ints, false, OS);
 
   EmitSuffix(OS);
 }
@@ -756,6 +753,17 @@ void IntrinsicEmitter::EmitIntrinsicToBu
        << "Builtin(const char "
        << "*TargetPrefixStr, StringRef BuiltinNameStr) {\n";
   }
+
+  if (Table.Empty()) {
+    OS << "  return ";
+    if (!TargetPrefix.empty())
+      OS << "(" << TargetPrefix << "Intrinsic::ID)";
+    OS << "Intrinsic::not_intrinsic;\n";
+    OS << "}\n";
+    OS << "#endif\n\n";
+    return;
+  }
+
   OS << "  static const char BuiltinNames[] = {\n";
   Table.EmitCharArray(OS);
   OS << "  };\n\n";