From a9fdbbc55f640fecd3bb8df12fd205694c2f71a2 Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Tue, 22 May 2012 18:20:28 +0000
Subject: [PATCH] Also compute TopoSigs in synthetic register classes.

CodeGenRegisterClass has two constructors. Both need to compute the
TopoSigs BitVector.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157271 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/TableGen/CodeGenRegisters.cpp | 9 +++++++--
 utils/TableGen/CodeGenRegisters.h   | 2 +-
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/utils/TableGen/CodeGenRegisters.cpp b/utils/TableGen/CodeGenRegisters.cpp
index 813a71ab3bd..2b064aa3073 100644
--- a/utils/TableGen/CodeGenRegisters.cpp
+++ b/utils/TableGen/CodeGenRegisters.cpp
@@ -764,15 +764,20 @@ CodeGenRegisterClass::CodeGenRegisterClass(CodeGenRegBank &RegBank, Record *R)
 // Create an inferred register class that was missing from the .td files.
 // Most properties will be inherited from the closest super-class after the
 // class structure has been computed.
-CodeGenRegisterClass::CodeGenRegisterClass(StringRef Name, Key Props)
+CodeGenRegisterClass::CodeGenRegisterClass(CodeGenRegBank &RegBank,
+                                           StringRef Name, Key Props)
   : Members(*Props.Members),
     TheDef(0),
     Name(Name),
+    TopoSigs(RegBank.getNumTopoSigs()),
     EnumValue(-1),
     SpillSize(Props.SpillSize),
     SpillAlignment(Props.SpillAlignment),
     CopyCost(0),
     Allocatable(true) {
+  for (CodeGenRegister::Set::iterator I = Members.begin(), E = Members.end();
+       I != E; ++I)
+    TopoSigs.set((*I)->getTopoSig());
 }
 
 // Compute inherited propertied for a synthesized register class.
@@ -1080,7 +1085,7 @@ CodeGenRegBank::getOrCreateSubClass(const CodeGenRegisterClass *RC,
     return FoundI->second;
 
   // Sub-class doesn't exist, create a new one.
-  CodeGenRegisterClass *NewRC = new CodeGenRegisterClass(Name, K);
+  CodeGenRegisterClass *NewRC = new CodeGenRegisterClass(*this, Name, K);
   addToMaps(NewRC);
   return NewRC;
 }
diff --git a/utils/TableGen/CodeGenRegisters.h b/utils/TableGen/CodeGenRegisters.h
index d00b999aff7..30461523ec2 100644
--- a/utils/TableGen/CodeGenRegisters.h
+++ b/utils/TableGen/CodeGenRegisters.h
@@ -368,7 +368,7 @@ namespace llvm {
     };
 
     // Create a non-user defined register class.
-    CodeGenRegisterClass(StringRef Name, Key Props);
+    CodeGenRegisterClass(CodeGenRegBank&, StringRef Name, Key Props);
 
     // Called by CodeGenRegBank::CodeGenRegBank().
     static void computeSubClasses(CodeGenRegBank&);