[GuardWidening] Wire up a NPM version of the LoopGuardWidening pass
llvm-svn: 358704
diff --git a/llvm/lib/Transforms/Scalar/GuardWidening.cpp b/llvm/lib/Transforms/Scalar/GuardWidening.cpp
index ec1f914..e14f44b 100644
--- a/llvm/lib/Transforms/Scalar/GuardWidening.cpp
+++ b/llvm/lib/Transforms/Scalar/GuardWidening.cpp
@@ -817,6 +817,31 @@
return PA;
}
+PreservedAnalyses GuardWideningPass::run(Loop &L, LoopAnalysisManager &AM,
+ LoopStandardAnalysisResults &AR,
+ LPMUpdater &U) {
+
+ const auto &FAM =
+ AM.getResult<FunctionAnalysisManagerLoopProxy>(L, AR).getManager();
+ Function &F = *L.getHeader()->getParent();
+ BranchProbabilityInfo *BPI = nullptr;
+ if (WidenFrequentBranches)
+ BPI = FAM.getCachedResult<BranchProbabilityAnalysis>(F);
+
+ BasicBlock *RootBB = L.getLoopPredecessor();
+ if (!RootBB)
+ RootBB = L.getHeader();
+ auto BlockFilter = [&](BasicBlock *BB) {
+ return BB == RootBB || L.contains(BB);
+ };
+ if (!GuardWideningImpl(AR.DT, nullptr, AR.LI, BPI,
+ AR.DT.getNode(RootBB),
+ BlockFilter).run())
+ return PreservedAnalyses::all();
+
+ return getLoopPassPreservedAnalyses();
+}
+
namespace {
struct GuardWideningLegacyPass : public FunctionPass {
static char ID;