[llvm-commits] [llvm] r108411 - in /llvm/trunk/lib/CodeGen: CriticalAntiDepBreaker.cpp CriticalAntiDepBreaker.h

[Bill Wendling]

Author: void
Date: Thu Jul 15 00:56:32 2010
New Revision: 108411

URL: http://llvm.org/viewvc/llvm-project?rev=108411&view=rev
Log:
Use std::vector instead of a hard-coded array. The length of that array could
get *very* large, but we only need it to be the size of thenumber of pregs.

Modified:
    llvm/trunk/lib/CodeGen/CriticalAntiDepBreaker.cpp
    llvm/trunk/lib/CodeGen/CriticalAntiDepBreaker.h

Modified: llvm/trunk/lib/CodeGen/CriticalAntiDepBreaker.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/CriticalAntiDepBreaker.cpp?rev=108411&r1=108410&r2=108411&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/CriticalAntiDepBreaker.cpp (original)
+++ llvm/trunk/lib/CodeGen/CriticalAntiDepBreaker.cpp Thu Jul 15 00:56:32 2010
@@ -34,6 +34,9 @@
   TRI(MF.getTarget().getRegisterInfo()),
   AllocatableSet(TRI->getAllocatableSet(MF))
 {
+  Classes.reserve(TRI->getNumRegs());
+  KillIndices.reserve(TRI->getNumRegs());
+  DefIndices.reserve(TRI->getNumRegs());
 }
 
 CriticalAntiDepBreaker::~CriticalAntiDepBreaker() {
@@ -41,8 +44,7 @@
 
 void CriticalAntiDepBreaker::StartBlock(MachineBasicBlock *BB) {
   // Clear out the register class data.
-  std::fill(Classes, array_endof(Classes),
-            static_cast<const TargetRegisterClass *>(0));
+  Classes.clear();
 
   // Initialize the indices to indicate that no registers are live.
   const unsigned BBSize = BB->size();

Modified: llvm/trunk/lib/CodeGen/CriticalAntiDepBreaker.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/CriticalAntiDepBreaker.h?rev=108411&r1=108410&r2=108411&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/CriticalAntiDepBreaker.h (original)
+++ llvm/trunk/lib/CodeGen/CriticalAntiDepBreaker.h Thu Jul 15 00:56:32 2010
@@ -25,6 +25,7 @@
 #include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/SmallSet.h"
 #include <map>
+#include <vector>
 
 namespace llvm {
 class TargetInstrInfo;
@@ -46,19 +47,18 @@
     /// corresponding value is null. If the register is live but used in
     /// multiple register classes, the corresponding value is -1 casted to a
     /// pointer.
-    const TargetRegisterClass *
-      Classes[TargetRegisterInfo::FirstVirtualRegister];
+    std::vector<const TargetRegisterClass *> Classes;
 
     /// RegRegs - Map registers to all their references within a live range.
     std::multimap<unsigned, MachineOperand *> RegRefs;
 
     /// KillIndices - The index of the most recent kill (proceding bottom-up),
     /// or ~0u if the register is not live.
-    unsigned KillIndices[TargetRegisterInfo::FirstVirtualRegister];
+    std::vector<unsigned> KillIndices;
 
     /// DefIndices - The index of the most recent complete def (proceding bottom
     /// up), or ~0u if the register is live.
-    unsigned DefIndices[TargetRegisterInfo::FirstVirtualRegister];
+    std::vector<unsigned> DefIndices;
 
     /// KeepRegs - A set of registers which are live and cannot be changed to
     /// break anti-dependencies.