diff options
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/IPO/SampleProfile.cpp | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/llvm/lib/Transforms/IPO/SampleProfile.cpp b/llvm/lib/Transforms/IPO/SampleProfile.cpp index 500686529ad..ad806addf6c 100644 --- a/llvm/lib/Transforms/IPO/SampleProfile.cpp +++ b/llvm/lib/Transforms/IPO/SampleProfile.cpp @@ -1120,17 +1120,21 @@ void SampleProfileLoader::propagateWeights(Function &F) { // Only set weights if there is at least one non-zero weight. // In any other case, let the analyzer set weights. - DEBUG(dbgs() << "SUCCESS. Found non-zero weights.\n"); - TI->setMetadata(llvm::LLVMContext::MD_prof, - MDB.createBranchWeights(Weights)); - DebugLoc BranchLoc = TI->getDebugLoc(); - emitOptimizationRemark( - Ctx, DEBUG_TYPE, F, MaxDestLoc, - Twine("most popular destination for conditional branches at ") + - ((BranchLoc) ? Twine(BranchLoc->getFilename() + ":" + - Twine(BranchLoc.getLine()) + ":" + - Twine(BranchLoc.getCol())) - : Twine("<UNKNOWN LOCATION>"))); + if (MaxWeight > 0) { + DEBUG(dbgs() << "SUCCESS. Found non-zero weights.\n"); + TI->setMetadata(llvm::LLVMContext::MD_prof, + MDB.createBranchWeights(Weights)); + DebugLoc BranchLoc = TI->getDebugLoc(); + emitOptimizationRemark( + Ctx, DEBUG_TYPE, F, MaxDestLoc, + Twine("most popular destination for conditional branches at ") + + ((BranchLoc) ? Twine(BranchLoc->getFilename() + ":" + + Twine(BranchLoc.getLine()) + ":" + + Twine(BranchLoc.getCol())) + : Twine("<UNKNOWN LOCATION>"))); + } else { + DEBUG(dbgs() << "SKIPPED. All branch weights are zero.\n"); + } } } |
