Add a new interface to allow IR-level passes to access codegen-specific information.

[oota-llvm.git] / lib / CodeGen / RegisterClassInfo.cpp

diff --git a/lib/CodeGen/RegisterClassInfo.cpp b/lib/CodeGen/RegisterClassInfo.cpp
index 58b1681b0bfb22c2af0a813d11923f19011a4036..652bc3015a3d73171bb04ba6aea28a18662f2f66 100644 (file)
--- a/lib/CodeGen/RegisterClassInfo.cpp
+++ b/lib/CodeGen/RegisterClassInfo.cpp
@@ -15,8 +15,8 @@
 //===----------------------------------------------------------------------===//
 
 #define DEBUG_TYPE "regalloc"
-#include "RegisterClassInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/RegisterClassInfo.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/Debug.h"
@@ -50,9 +50,8 @@ void RegisterClassInfo::runOnMachineFunction(const MachineFunction &mf) {
     CSRNum.clear();
     CSRNum.resize(TRI->getNumRegs(), 0);
     for (unsigned N = 0; unsigned Reg = CSR[N]; ++N)
-      for (const unsigned *AS = TRI->getOverlaps(Reg);
-           unsigned Alias = *AS; ++AS)
-        CSRNum[Alias] = N + 1; // 0 means no CSR, 1 means CalleeSaved[0], ...
+      for (MCRegAliasIterator AI(Reg, TRI, true); AI.isValid(); ++AI)
+        CSRNum[*AI] = N + 1; // 0 means no CSR, 1 means CalleeSaved[0], ...
     Update = true;
   }
   CalleeSaved = CSR;