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

contributed by Morten Ofstad

llvm-svn: 17217
This commit is contained in:
Chris Lattner 2004-10-25 18:44:14 +00:00
parent 7eeed938bf
commit 6180881673
1 changed files with 5 additions and 5 deletions
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10
llvm/lib/CodeGen/LiveVariables.cpp
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@ -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 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &MF) {
// 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);