6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-06-12 13:38:21 +00:00
Code Issues Projects Releases Wiki Activity

(Almost) always call reserveOperandSpace() on newly created PHINodes.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128535 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jay Foad
2011-03-30 11:19:20 +00:00
parent 8be7d8b43c
commit d8b4fb4aab
26 changed files with 54 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
lib/Transforms/Utils/CodeExtractor.cpp
View File

@ -104,7 +104,7 @@ namespace {
/// region, we need to split the entry block of the region so that the PHI node
/// is easier to deal with.
void CodeExtractor::severSplitPHINodes(BasicBlock *&Header) {
bool HasPredsFromRegion = false;
unsigned NumPredsFromRegion = 0;
unsigned NumPredsOutsideRegion = 0;
if (Header != &Header->getParent()->getEntryBlock()) {
@ -116,7 +116,7 @@ void CodeExtractor::severSplitPHINodes(BasicBlock *&Header) {
// header block into two.
for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
if (BlocksToExtract.count(PN->getIncomingBlock(i)))
HasPredsFromRegion = true;
++NumPredsFromRegion;
else
++NumPredsOutsideRegion;
@ -147,7 +147,7 @@ void CodeExtractor::severSplitPHINodes(BasicBlock *&Header) {
// Okay, now we need to adjust the PHI nodes and any branches from within the
// region to go to the new header block instead of the old header block.
if (HasPredsFromRegion) {
if (NumPredsFromRegion) {
PHINode *PN = cast<PHINode>(OldPred->begin());
// Loop over all of the predecessors of OldPred that are in the region,
// changing them to branch to NewBB instead.
@ -165,6 +165,7 @@ void CodeExtractor::severSplitPHINodes(BasicBlock *&Header) {
// from OldPred of PN.
PHINode *NewPN = PHINode::Create(PN->getType(), PN->getName()+".ce",
NewBB->begin());
NewPN->reserveOperandSpace(1+NumPredsFromRegion);
NewPN->addIncoming(PN, OldPred);
// Loop over all of the incoming value in PN, moving them to NewPN if they