commit 18c97fa2a0b012c23c38fc67c3aca470398a2e26
author Duncan P. N. Exon Smith <dexonsmith@apple.com> Fri Mar 20 18:48:45 2015 +0000
committer Duncan P. N. Exon Smith <dexonsmith@apple.com> Fri Mar 20 18:48:45 2015 +0000
tree eebaf255082b6614e5f50dcfe8fe43810de24352
parent 90aa1a96532b158e73df3d0ecbc0c138ae8cc2e5

SanitizerCoverage: Check for null DebugLocs

After a WIP patch to make `DIDescriptor` accessors more strict, this
started asserting.

llvm-svn: 232832

llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp

diff --git a/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp b/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
index 9c74b5e..9f534e4 100644
--- a/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
+++ b/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
@@ -329,8 +329,9 @@
   }
 
   bool IsEntryBB = &BB == &F.getEntryBlock();
-  DebugLoc EntryLoc =
-      IsEntryBB ? IP->getDebugLoc().getFnDebugLoc(*C) : IP->getDebugLoc();
+  DebugLoc EntryLoc = IsEntryBB && !IP->getDebugLoc().isUnknown()
+                          ? IP->getDebugLoc().getFnDebugLoc(*C)
+                          : IP->getDebugLoc();
   IRBuilder<> IRB(IP);
   IRB.SetCurrentDebugLocation(EntryLoc);
   SmallVector<Value *, 1> Indices;