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Pool-allocation for MachineInstrs, MachineBasicBlocks, and

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MachineMemOperands. The pools are owned by MachineFunctions.

This drastically reduces the number of calls to malloc/free made
during the "Emit" phase of scheduling, as well as later phases
in CodeGen. Combined with other changes, this speeds up the
"instruction selection" phase of CodeGen by 10% in some cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53212 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2008-07-07 23:14:23 +00:00
parent 0e5f1306b0
commit 8e5f2c6f65
37 changed files with 625 additions and 516 deletions
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8
lib/CodeGen/BranchFolding.cpp
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@@ -127,7 +127,7 @@ void BranchFolder::RemoveDeadBlock(MachineBasicBlock *MBB) {
}
// Remove the block.
MF->getBasicBlockList().erase(MBB);
MF->erase(MBB);
}
/// OptimizeImpDefsBlock - If a basic block is just a bunch of implicit_def
@@ -375,10 +375,12 @@ void BranchFolder::ReplaceTailWithBranchTo(MachineBasicBlock::iterator OldInst,
/// iterator. This returns the new MBB.
MachineBasicBlock *BranchFolder::SplitMBBAt(MachineBasicBlock &CurMBB,
MachineBasicBlock::iterator BBI1) {
MachineFunction &MF = *CurMBB.getParent();
// Create the fall-through block.
MachineFunction::iterator MBBI = &CurMBB;
MachineBasicBlock *NewMBB = new MachineBasicBlock(CurMBB.getBasicBlock());
CurMBB.getParent()->getBasicBlockList().insert(++MBBI, NewMBB);
MachineBasicBlock *NewMBB =MF.CreateMachineBasicBlock(CurMBB.getBasicBlock());
CurMBB.getParent()->insert(++MBBI, NewMBB);
// Move all the successors of this block to the specified block.
NewMBB->transferSuccessors(&CurMBB);