[MachineRegisterInfo] Add a method to set the size of a virtual register a posteriori.

This is required for mir testing.

llvm-svn: 262861

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/MachineRegisterInfo.cpp b/llvm/lib/CodeGen/MachineRegisterInfo.cpp
index 2b81f6b2015..8521bee82e6 100644
--- a/llvm/lib/CodeGen/MachineRegisterInfo.cpp
+++ b/llvm/lib/CodeGen/MachineRegisterInfo.cpp
@@ -109,6 +109,10 @@ MachineRegisterInfo::getSize(unsigned VReg) const {
   return SizeIt != getVRegToSize().end() ? SizeIt->second : 0;
 }
 
+void MachineRegisterInfo::setSize(unsigned VReg, unsigned Size) {
+  getVRegToSize()[VReg] = Size;
+}
+
 unsigned
 MachineRegisterInfo::createGenericVirtualRegister(unsigned Size) {
   assert(Size && "Cannot create empty virtual register");