[PATCH] D11515: [mips][FastISel] Fix call lowering by bailing out on "fastcc" calls.

[Vasileios Kalintiris]

vkalintiris created this revision.
vkalintiris added a reviewer: dsanders.
vkalintiris added a subscriber: llvm-commits.

Currently, we support only the MIPS O32 ABI calling convention for call
lowering. With this change we avoid using the O32 calling convetion for
lowering calls marked as using the fast calling convention.

http://reviews.llvm.org/D11515

Files:
  lib/Target/Mips/MipsFastISel.cpp

Index: lib/Target/Mips/MipsFastISel.cpp
===================================================================
--- lib/Target/Mips/MipsFastISel.cpp
+++ lib/Target/Mips/MipsFastISel.cpp
@@ -1238,6 +1238,10 @@
   const Value *Callee = CLI.Callee;
   MCSymbol *Symbol = CLI.Symbol;
 
+  // Do not handle FastCC.
+  if (CC == CallingConv::Fast)
+    return false;
+
   // Allow SelectionDAG isel to handle tail calls.
   if (IsTailCall)
     return false;
@@ -1415,6 +1419,11 @@
 
   if (Ret->getNumOperands() > 0) {
     CallingConv::ID CC = F.getCallingConv();
+
+    // Do not handle FastCC.
+    if (CC == CallingConv::Fast)
+      return false;
+
     SmallVector<ISD::OutputArg, 4> Outs;
     GetReturnInfo(F.getReturnType(), F.getAttributes(), Outs, TLI, DL);
 


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