[GISel] Pass MD_callees metadata down in call lowering.

Summary:
This will make it possible to improve IPRA by taking into account
register usage in indirect calls.

NFC yet; this is just laying the groundwork to start building
up patches to take advantage of the information for improved register
allocation.

Reviewers: aditya_nandakumar, volkan, qcolombet, arsenm, rovka, aemerson, paquette

Subscribers: sdardis, wdng, javed.absar, hiraditya, jrtc27, atanasyan, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D65488

llvm-svn: 367476

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/lib/Target/X86/X86CallLowering.cpp b/llvm/lib/Target/X86/X86CallLowering.cpp
index b16b3839c85..e97a28a760c 100644
--- a/llvm/lib/Target/X86/X86CallLowering.cpp
+++ b/llvm/lib/Target/X86/X86CallLowering.cpp
@@ -375,7 +375,8 @@ bool X86CallLowering::lowerCall(MachineIRBuilder &MIRBuilder,
                                 CallingConv::ID CallConv,
                                 const MachineOperand &Callee,
                                 const ArgInfo &OrigRet,
-                                ArrayRef<ArgInfo> OrigArgs) const {
+                                ArrayRef<ArgInfo> OrigArgs,
+                                const MDNode *KnownCallees) const {
   MachineFunction &MF = MIRBuilder.getMF();
   const Function &F = MF.getFunction();
   MachineRegisterInfo &MRI = MF.getRegInfo();