MIR Serialization: Serialize MBB successors.

This commit implements serialization of the machine basic block successors. It
uses a YAML flow sequence that contains strings that have the MBB references.
The MBB references in those strings use the same syntax as the MBB machine
operands in the machine instruction strings.

Reviewers: Duncan P. N. Exon Smith

Differential Revision: http://reviews.llvm.org/D10699

llvm-svn: 241093

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/MIRPrinter.cpp b/llvm/lib/CodeGen/MIRPrinter.cpp
index 18c976bcd3e..6b6675579cc 100644
--- a/llvm/lib/CodeGen/MIRPrinter.cpp
+++ b/llvm/lib/CodeGen/MIRPrinter.cpp
@@ -131,6 +131,12 @@ void MIRPrinter::convert(const Module &M, yaml::MachineBasicBlock &YamlMBB,
   YamlMBB.Alignment = MBB.getAlignment();
   YamlMBB.AddressTaken = MBB.hasAddressTaken();
   YamlMBB.IsLandingPad = MBB.isLandingPad();
+  for (const auto *MBB : MBB.successors()) {
+    std::string Str;
+    raw_string_ostream StrOS(Str);
+    MIPrinter(M, StrOS, RegisterMaskIds).printMBBReference(*MBB);
+    YamlMBB.Successors.push_back(StrOS.str());
+  }
 
   // Print the machine instructions.
   YamlMBB.Instructions.reserve(MBB.size());