diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Transforms/Scalar/GVN.cpp | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/GVN.cpp b/lib/Transforms/Scalar/GVN.cpp index 222320f..946c33e 100644 --- a/lib/Transforms/Scalar/GVN.cpp +++ b/lib/Transforms/Scalar/GVN.cpp @@ -1158,8 +1158,18 @@ bool GVN::processLoad(LoadInst *L, SmallVectorImpl<Instruction*> &toErase) { MemDepResult dep = MD->getDependency(L); // If the value isn't available, don't do anything! - if (dep.isClobber()) + if (dep.isClobber()) { + DEBUG( + // fast print dep, using operator<< on instruction would be too slow + DOUT << "GVN: load "; + WriteAsOperand(*DOUT.stream(), L); + Instruction *I = dep.getInst(); + DOUT << " is clobbered by " << I->getOpcodeName() << " instruction "; + WriteAsOperand(*DOUT.stream(), I, false); + DOUT << "\n"; + ); return false; + } // If it is defined in another block, try harder. if (dep.isNonLocal()) |