Infrastructure for getting the machine code size of a function and an instruction. X86, PowerPC and ARM are implemented

llvm-svn: 49809

1 files changed, 11 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/TargetInstrInfoImpl.cpp b/llvm/lib/CodeGen/TargetInstrInfoImpl.cpp
index 4b8c669a25a..1bb08ab93bb 100644
--- a/llvm/lib/CodeGen/TargetInstrInfoImpl.cpp
+++ b/llvm/lib/CodeGen/TargetInstrInfoImpl.cpp
@@ -94,3 +94,14 @@ void TargetInstrInfoImpl::reMaterialize(MachineBasicBlock &MBB,
   MBB.insert(I, MI);
 }
 
+unsigned
+TargetInstrInfoImpl::GetFunctionSizeInBytes(const MachineFunction &MF) const {
+  unsigned FnSize = 0;
+  for (MachineFunction::const_iterator MBBI = MF.begin(), E = MF.end();
+       MBBI != E; ++MBBI) {
+    const MachineBasicBlock &MBB = *MBBI;
+    for (MachineBasicBlock::const_iterator I = MBB.begin(),E = MBB.end(); I != E; ++I)
+      FnSize += GetInstSizeInBytes(I);
+  }
+  return FnSize;
+}