6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-09-13 23:25:06 +00:00
Code Issues Projects Releases Wiki Activity

Bring UsedBlocks back. StrongPHIElimination needs this information.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43866 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2007-11-08 01:20:48 +00:00
parent 43b665db50
commit a018540807
3 changed files with 15 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
lib/CodeGen/LiveVariables.cpp
View File

@@ -50,6 +50,9 @@ void LiveVariables::VarInfo::dump() const {
cerr << " Alive in blocks: ";
for (unsigned i = 0, e = AliveBlocks.size(); i != e; ++i)
if (AliveBlocks[i]) cerr << i << ", ";
cerr << " Used in blocks: ";
for (unsigned i = 0, e = UsedBlocks.size(); i != e; ++i)
if (UsedBlocks[i]) cerr << i << ", ";
cerr << "\n Killed by:";
if (Kills.empty())
cerr << " No instructions.\n";
@@ -72,6 +75,7 @@ LiveVariables::VarInfo &LiveVariables::getVarInfo(unsigned RegIdx) {
}
VarInfo &VI = VirtRegInfo[RegIdx];
VI.AliveBlocks.resize(MF->getNumBlockIDs());
VI.UsedBlocks.resize(MF->getNumBlockIDs());
return VI;
}
@@ -154,6 +158,9 @@ void LiveVariables::HandleVirtRegUse(VarInfo &VRInfo, MachineBasicBlock *MBB,
MachineInstr *MI) {
assert(VRInfo.DefInst && "Register use before def!");
unsigned BBNum = MBB->getNumber();
VRInfo.UsedBlocks[BBNum] = true;
VRInfo.NumUses++;
// Check to see if this basic block is already a kill block...
@@ -176,7 +183,7 @@ void LiveVariables::HandleVirtRegUse(VarInfo &VRInfo, MachineBasicBlock *MBB,
// If this virtual register is already marked as alive in this basic block,
// that means it is alive in at least one of the successor block, it's not
// a kill.
if (!VRInfo.AliveBlocks[MBB->getNumber()])
if (!VRInfo.AliveBlocks[BBNum])
VRInfo.Kills.push_back(MI);
// Update all dominating blocks to mark them known live.