[llvm-commits] CVS: llvm/lib/CodeGen/LiveVariables.cpp

[Chris Lattner]

Changes in directory llvm/lib/CodeGen:

LiveVariables.cpp updated: 1.44 -> 1.45
---
Log message:

Do not use variable sized arrays in C++, they are non-portable.  Patch
contributed by Morten Ofstad


---
Diffs of the changes:  (+5 -5)

Index: llvm/lib/CodeGen/LiveVariables.cpp
diff -u llvm/lib/CodeGen/LiveVariables.cpp:1.44 llvm/lib/CodeGen/LiveVariables.cpp:1.45
--- llvm/lib/CodeGen/LiveVariables.cpp:1.44	Wed Sep  1 17:55:35 2004
+++ llvm/lib/CodeGen/LiveVariables.cpp	Mon Oct 25 13:44:14 2004
@@ -33,6 +33,7 @@
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/ADT/DepthFirstIterator.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/Config/alloca.h"
 using namespace llvm;
 
 static RegisterAnalysis<LiveVariables> X("livevars", "Live Variable Analysis");
@@ -155,11 +156,10 @@
   // physical register.  This is a purely local property, because all physical
   // register references as presumed dead across basic blocks.
   //
-  MachineInstr *PhysRegInfoA[RegInfo->getNumRegs()];
-  bool          PhysRegUsedA[RegInfo->getNumRegs()];
-  std::fill(PhysRegInfoA, PhysRegInfoA+RegInfo->getNumRegs(), (MachineInstr*)0);
-  PhysRegInfo = PhysRegInfoA;
-  PhysRegUsed = PhysRegUsedA;
+  PhysRegInfo = (MachineInstr**)alloca(sizeof(MachineInstr*) * 
+                                       RegInfo->getNumRegs());
+  PhysRegUsed = (bool*)alloca(sizeof(bool)*RegInfo->getNumRegs());
+  std::fill(PhysRegInfo, PhysRegInfo+RegInfo->getNumRegs(), (MachineInstr*)0);
 
   /// Get some space for a respectable number of registers...
   VirtRegInfo.resize(64);