6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-09-27 00:21:03 +00:00
Code Issues Projects Releases Wiki Activity

Remove isAccessable.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34497 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey
2007-02-22 16:39:03 +00:00
parent a4e7cd947e
commit 033c9715d9
2 changed files with 4 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
lib/CodeGen/BranchFolding.cpp
View File

@@ -67,7 +67,7 @@ FunctionPass *llvm::createBranchFoldingPass() { return new BranchFolder(); }
/// RemoveDeadBlock - Remove the specified dead machine basic block from the
/// function, updating the CFG.
void BranchFolder::RemoveDeadBlock(MachineBasicBlock *MBB) {
assert(!MBB->isAccessable() && "MBB must be dead!");
assert(MBB->pred_empty() && "MBB must be dead!");
DOUT << "\nRemoving MBB: " << *MBB;
MachineFunction *MF = MBB->getParent();
@@ -440,7 +440,7 @@ bool BranchFolder::OptimizeBranches(MachineFunction &MF) {
OptimizeBlock(MBB);
// If it is dead, remove it.
if (!MBB->isAccessable()) {
if (MBB->pred_empty()) {
RemoveDeadBlock(MBB);
MadeChange = true;
++NumDeadBlocks;
@@ -618,14 +618,14 @@ void BranchFolder::OptimizeBlock(MachineBasicBlock *MBB) {
// explicitly.
if (MBB->empty()) {
// Dead block? Leave for cleanup later.
if (!MBB->isAccessable()) return;
if (MBB->pred_empty()) return;
if (FallThrough == MBB->getParent()->end()) {
// TODO: Simplify preds to not branch here if possible!
} else {
// Rewrite all predecessors of the old block to go to the fallthrough
// instead.
while (MBB->isAccessable()) {
while (!MBB->pred_empty()) {
MachineBasicBlock *Pred = *(MBB->pred_end()-1);
ReplaceUsesOfBlockWith(Pred, MBB, FallThrough, TII);
}