[sancov] Disable sanitizer coverage on functions using SEH
Splitting basic blocks really messes up WinEHPrepare. We can remove this
change when SEH uses the new EH IR.
llvm-svn: 246799
diff --git a/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp b/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
index 3bcb8de..b021f31 100644
--- a/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
+++ b/llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
@@ -31,6 +31,7 @@
#include "llvm/Transforms/Instrumentation.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallVector.h"
+#include "llvm/Analysis/LibCallSemantics.h"
#include "llvm/IR/CallSite.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DebugInfo.h"
@@ -290,6 +291,12 @@
if (F.empty()) return false;
if (F.getName().find(".module_ctor") != std::string::npos)
return false; // Should not instrument sanitizer init functions.
+ // Don't instrument functions using SEH for now. Splitting basic blocks like
+ // we do for coverage breaks WinEHPrepare.
+ // FIXME: Remove this when SEH no longer uses landingpad pattern matching.
+ if (F.hasPersonalityFn() &&
+ isAsynchronousEHPersonality(classifyEHPersonality(F.getPersonalityFn())))
+ return false;
if (Options.CoverageType >= SanitizerCoverageOptions::SCK_Edge)
SplitAllCriticalEdges(F);
SmallVector<Instruction*, 8> IndirCalls;