[NewPM] Port Msan
Summary:
Keeping msan a function pass requires replacing the module level initialization:
That means, don't define a ctor function which calls __msan_init, instead just
declare the init function at the first access, and add that to the global ctors
list.
Changes:
- Pull the actual sanitizer and the wrapper pass apart.
- Add a newpm msan pass. The function pass inserts calls to runtime
library functions, for which it inserts declarations as necessary.
- Update tests.
Caveats:
- There is one test that I dropped, because it specifically tested the
definition of the ctor.
Reviewers: chandlerc, fedor.sergeev, leonardchan, vitalybuka
Subscribers: sdardis, nemanjai, javed.absar, hiraditya, kbarton, bollu, atanasyan, jsji
Differential Revision: https://reviews.llvm.org/D55647
llvm-svn: 350305
diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
index 52fc08d..3280417 100644
--- a/clang/lib/CodeGen/BackendUtil.cpp
+++ b/clang/lib/CodeGen/BackendUtil.cpp
@@ -53,6 +53,7 @@
#include "llvm/Transforms/IPO/ThinLTOBitcodeWriter.h"
#include "llvm/Transforms/InstCombine/InstCombine.h"
#include "llvm/Transforms/Instrumentation.h"
+#include "llvm/Transforms/Instrumentation/MemorySanitizer.h"
#include "llvm/Transforms/Instrumentation/BoundsChecking.h"
#include "llvm/Transforms/Instrumentation/GCOVProfiler.h"
#include "llvm/Transforms/ObjCARC.h"
@@ -276,7 +277,7 @@
const CodeGenOptions &CGOpts = BuilderWrapper.getCGOpts();
int TrackOrigins = CGOpts.SanitizeMemoryTrackOrigins;
bool Recover = CGOpts.SanitizeRecover.has(SanitizerKind::Memory);
- PM.add(createMemorySanitizerPass(TrackOrigins, Recover, CompileKernel));
+ PM.add(createMemorySanitizerLegacyPassPass(TrackOrigins, Recover, CompileKernel));
// MemorySanitizer inserts complex instrumentation that mostly follows
// the logic of the original code, but operates on "shadow" values.