[SampleProfile] Don't assert when printing the DebugLoc of a branch. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300544 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/IPO/SampleProfile.cpp b/lib/Transforms/IPO/SampleProfile.cpp
index 642d80e6b8a2ea9e7ac9c8cea7ea1e0369ed31f0..e755e2bd8f260765e0de3a3c87e9f5b9e9b05572 100644 (file)
--- a/lib/Transforms/IPO/SampleProfile.cpp
+++ b/lib/Transforms/IPO/SampleProfile.cpp
@@ -1191,8 +1191,11 @@ void SampleProfileLoader::propagateWeights(Function &F) {
     if (!isa<BranchInst>(TI) && !isa<SwitchInst>(TI))
       continue;
 
+    DebugLoc BranchLoc = TI->getDebugLoc();
     DEBUG(dbgs() << "\nGetting weights for branch at line "
-                 << TI->getDebugLoc().getLine() << ".\n");
+                 << ((BranchLoc) ? Twine(BranchLoc.getLine())
+                                 : Twine("<UNKNOWN LOCATION>"))
+                 << ".\n");
     SmallVector<uint32_t, 4> Weights;
     uint32_t MaxWeight = 0;
     DebugLoc MaxDestLoc;
@@ -1229,7 +1232,6 @@ void SampleProfileLoader::propagateWeights(Function &F) {
       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 ") +