[tablegen] Add CustomCallingConv and use it to tablegen-erate the outermost parts of the Mips O32 implementation

Summary:
CustomCallingConv is simply a CallingConv that tablegen should not generate the
implementation for. It allows regular CallingConv's to delegate to these custom
functions. This is (currently) necessary for Mips and we cannot use CCCustom
without having to adapt to the different API that CCCustom uses.

This brings us a bit closer to being able to remove
MipsCC::analyzeCallOperands and MipsCC::analyzeFormalArguments in favour of
the common implementation.

No functional change to the targets.

Depends on D3341

Reviewers: vmedic

Reviewed By: vmedic

Subscribers: vmedic, llvm-commits

Differential Revision: http://reviews.llvm.org/D5965

llvm-svn: 221052

1 files changed, 17 insertions, 14 deletions

diff --git a/llvm/utils/TableGen/CallingConvEmitter.cpp b/llvm/utils/TableGen/CallingConvEmitter.cpp
index 64846d9..6a65e5e 100644
--- a/llvm/utils/TableGen/CallingConvEmitter.cpp
+++ b/llvm/utils/TableGen/CallingConvEmitter.cpp
@@ -35,23 +35,26 @@ private:
 } // End anonymous namespace
 
 void CallingConvEmitter::run(raw_ostream &O) {
-
   std::vector<Record*> CCs = Records.getAllDerivedDefinitions("CallingConv");
-  
-  // Emit prototypes for all of the CC's so that they can forward ref each
-  // other.
+
+  // Emit prototypes for all of the non-custom CC's so that they can forward ref
+  // each other.
+  for (unsigned i = 0, e = CCs.size(); i != e; ++i) {
+    if (!CCs[i]->getValueAsBit("Custom")) {
+      O << "static bool " << CCs[i]->getName()
+        << "(unsigned ValNo, MVT ValVT,\n"
+        << std::string(CCs[i]->getName().size() + 13, ' ')
+        << "MVT LocVT, CCValAssign::LocInfo LocInfo,\n"
+        << std::string(CCs[i]->getName().size() + 13, ' ')
+        << "ISD::ArgFlagsTy ArgFlags, CCState &State);\n";
+    }
+  }
+
+  // Emit each non-custom calling convention description in full.
   for (unsigned i = 0, e = CCs.size(); i != e; ++i) {
-    O << "static bool " << CCs[i]->getName()
-      << "(unsigned ValNo, MVT ValVT,\n"
-      << std::string(CCs[i]->getName().size()+13, ' ')
-      << "MVT LocVT, CCValAssign::LocInfo LocInfo,\n"
-      << std::string(CCs[i]->getName().size()+13, ' ')
-      << "ISD::ArgFlagsTy ArgFlags, CCState &State);\n";
+    if (!CCs[i]->getValueAsBit("Custom"))
+      EmitCallingConv(CCs[i], O);
   }
-  
-  // Emit each calling convention description in full.
-  for (unsigned i = 0, e = CCs.size(); i != e; ++i)
-    EmitCallingConv(CCs[i], O);
 }