New EH representation for MSVC compatibility

Summary:
This introduces new instructions neccessary to implement MSVC-compatible
exception handling support.  Most of the middle-end and none of the
back-end haven't been audited or updated to take them into account.

Reviewers: rnk, JosephTremoulet, reames, nlewycky, rjmccall

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D11041

llvm-svn: 241888

1 files changed, 30 insertions, 0 deletions

diff --git a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
index 286a5633024..bcc39ef9fba 100644
--- a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
@@ -2653,6 +2653,26 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
     setOrigin(&I, getCleanOrigin());
   }
 
+  void visitCleanupBlockInst(CleanupBlockInst &I) {
+    setShadow(&I, getCleanShadow(&I));
+    setOrigin(&I, getCleanOrigin());
+  }
+
+  void visitCatchBlock(CatchBlockInst &I) {
+    setShadow(&I, getCleanShadow(&I));
+    setOrigin(&I, getCleanOrigin());
+  }
+
+  void visitTerminateBlock(TerminateBlockInst &I) {
+    setShadow(&I, getCleanShadow(&I));
+    setOrigin(&I, getCleanOrigin());
+  }
+
+  void visitCatchEndBlockInst(CatchEndBlockInst &I) {
+    setShadow(&I, getCleanShadow(&I));
+    setOrigin(&I, getCleanOrigin());
+  }
+
   void visitGetElementPtrInst(GetElementPtrInst &I) {
     handleShadowOr(I);
   }
@@ -2696,6 +2716,16 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
     // Nothing to do here.
   }
 
+  void visitCleanupReturnInst(CleanupReturnInst &CRI) {
+    DEBUG(dbgs() << "CleanupReturn: " << CRI << "\n");
+    // Nothing to do here.
+  }
+
+  void visitCatchReturnInst(CatchReturnInst &CRI) {
+    DEBUG(dbgs() << "CatchReturn: " << CRI << "\n");
+    // Nothing to do here.
+  }
+
   void visitInstruction(Instruction &I) {
     // Everything else: stop propagating and check for poisoned shadow.
     if (ClDumpStrictInstructions)