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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82462 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/CodeGenLICM.cpp b/lib/Transforms/Scalar/CodeGenLICM.cpp
index ef9f81e..778f3d2 100644 (file)
--- a/lib/Transforms/Scalar/CodeGenLICM.cpp
+++ b/lib/Transforms/Scalar/CodeGenLICM.cpp
@@ -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.