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Remove the special-case for constants in PHI nodes; it's not really 

helpful, and it didn't correctly handle the case of constants input
to PHIs for backedges.

llvm-svn: 82462
This commit is contained in:
Dan Gohman 2009-09-21 17:53:35 +00:00
parent 9045f235d2
commit af57ae3da4
1 changed files with 0 additions and 3 deletions
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3
llvm/lib/Transforms/Scalar/CodeGenLICM.cpp
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@ -60,9 +60,6 @@ bool CodeGenLICM::runOnLoop(Loop *L, LPPassManager &) {
for (BasicBlock::iterator BBI = BB->begin(), BBE = BB->end();
BBI != BBE; ++BBI) {
Instruction *I = BBI;
// Don't bother hoisting constants out of loop-header phi nodes.
if (BB == L->getHeader() && isa<PHINode>(I))
continue;
// TODO: For now, skip all intrinsic instructions, because some of them
// can require their operands to be constants, and we don't want to
// break that.