6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-14 16:33:28 +00:00
Code Issues Projects Releases Wiki Activity

Fix LICM/2003-12-11-SinkingToPHI.ll, and quite possibly all of the other known problems in the universe.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10409 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-12-11 22:23:32 +00:00
parent 0ac4d9247b
commit ea9403f2aa
1 changed files with 11 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
lib/Transforms/Scalar/LICM.cpp
View File

@ -337,9 +337,18 @@ bool LICM::canSinkOrHoistInst(Instruction &I) {
/// exit blocks of the loop.
///
bool LICM::isNotUsedInLoop(Instruction &I) {
for (Value::use_iterator UI = I.use_begin(), E = I.use_end(); UI != E; ++UI)
if (CurLoop->contains(cast<Instruction>(*UI)->getParent()))
for (Value::use_iterator UI = I.use_begin(), E = I.use_end(); UI != E; ++UI) {
Instruction *User = cast<Instruction>(*UI);
if (PHINode *PN = dyn_cast<PHINode>(User)) {
// PHI node uses occur in predecessor blocks!
for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
if (PN->getIncomingValue(i) == &I)
if (CurLoop->contains(PN->getIncomingBlock(i)))
return false;
} else if (CurLoop->contains(User->getParent())) {
return false;
}
}
return true;
}