From 36ce1b0157c306671a4868f8976bdcbc085417d4 Mon Sep 17 00:00:00 2001
From: Quentin Colombet <qcolombet@apple.com>
Date: Wed, 10 Feb 2016 23:43:48 +0000
Subject: [PATCH] [GlobalISel] Remember the size of generic virtual registers

llvm-svn: 260468
---
 llvm/include/llvm/CodeGen/MachineRegisterInfo.h | 11 +++++++++++
 llvm/lib/CodeGen/MachineInstr.cpp               |  9 ++++++++-
 llvm/lib/CodeGen/MachineRegisterInfo.cpp        |  9 +++++++++
 3 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/llvm/include/llvm/CodeGen/MachineRegisterInfo.h b/llvm/include/llvm/CodeGen/MachineRegisterInfo.h
index 04191bc..a09c379 100644
--- a/llvm/include/llvm/CodeGen/MachineRegisterInfo.h
+++ b/llvm/include/llvm/CodeGen/MachineRegisterInfo.h
@@ -105,6 +105,11 @@ private:
   /// started.
   BitVector ReservedRegs;
 
+#ifdef LLVM_BUILD_GLOBAL_ISEL
+  /// Map generic virtual registers to their actual size.
+  DenseMap<unsigned, unsigned> VRegToSize;
+#endif
+
   /// Keep track of the physical registers that are live in to the function.
   /// Live in values are typically arguments in registers.  LiveIn values are
   /// allowed to have virtual registers associated with them, stored in the
@@ -587,6 +592,12 @@ public:
   ///
   unsigned createVirtualRegister(const TargetRegisterClass *RegClass);
 
+#ifdef LLVM_BUILD_GLOBAL_ISEL
+  /// Get the size of \p VReg or 0 if VReg is not a generic
+  /// (target independent) virtual register.
+  unsigned getSize(unsigned VReg) const;
+#endif
+
   /// getNumVirtRegs - Return the number of virtual registers created.
   ///
   unsigned getNumVirtRegs() const { return VRegInfo.size(); }
diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp
index 1fee798..0f3d18a 100644
--- a/llvm/lib/CodeGen/MachineInstr.cpp
+++ b/llvm/lib/CodeGen/MachineInstr.cpp
@@ -1657,8 +1657,15 @@ void MachineInstr::print(raw_ostream &OS, ModuleSlotTracker &MST,
     if (StartOp != 0) OS << ", ";
     getOperand(StartOp).print(OS, MST, TRI);
     unsigned Reg = getOperand(StartOp).getReg();
-    if (TargetRegisterInfo::isVirtualRegister(Reg))
+    if (TargetRegisterInfo::isVirtualRegister(Reg)) {
       VirtRegs.push_back(Reg);
+#ifdef LLVM_BUILD_GLOBAL_ISEL
+      unsigned Size;
+      if (MRI && (Size = MRI->getSize(Reg))) {
+        OS << '(' << Size << ')';
+      }
+#endif
+    }
   }
 
   if (StartOp != 0)
diff --git a/llvm/lib/CodeGen/MachineRegisterInfo.cpp b/llvm/lib/CodeGen/MachineRegisterInfo.cpp
index 03c82f4..2d09aea 100644
--- a/llvm/lib/CodeGen/MachineRegisterInfo.cpp
+++ b/llvm/lib/CodeGen/MachineRegisterInfo.cpp
@@ -103,6 +103,15 @@ MachineRegisterInfo::createVirtualRegister(const TargetRegisterClass *RegClass){
   return Reg;
 }
 
+#ifdef LLVM_BUILD_GLOBAL_ISEL
+unsigned
+MachineRegisterInfo::getSize(unsigned VReg) const {
+  DenseMap<unsigned, unsigned>::const_iterator SizeIt =
+    VRegToSize.find(VReg);
+  return SizeIt != VRegToSize.end()? SizeIt->second: 0;
+}
+#endif // LLVM_BUILD_GLOBAL_ISEL
+
 /// clearVirtRegs - Remove all virtual registers (after physreg assignment).
 void MachineRegisterInfo::clearVirtRegs() {
 #ifndef NDEBUG
-- 
2.7.4