Move the personality function from LandingPadInst to Function

The personality routine currently lives in the LandingPadInst.

This isn't desirable because:
- All LandingPadInsts in the same function must have the same
  personality routine.  This means that each LandingPadInst beyond the
  first has an operand which produces no additional information.

- There is ongoing work to introduce EH IR constructs other than
  LandingPadInst.  Moving the personality routine off of any one
  particular Instruction and onto the parent function seems a lot better
  than have N different places a personality function can sneak onto an
  exceptional function.

Differential Revision: http://reviews.llvm.org/D10429

llvm-svn: 239940

2 files changed, 13 insertions, 2 deletions

diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
index cb8fafd3450..6da329d3b23 100644
--- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -695,7 +695,7 @@ static void WriteModuleInfo(const Module *M, const ValueEnumerator &VE,
   for (const Function &F : *M) {
     // FUNCTION:  [type, callingconv, isproto, linkage, paramattrs, alignment,
     //             section, visibility, gc, unnamed_addr, prologuedata,
-    //             dllstorageclass, comdat, prefixdata]
+    //             dllstorageclass, comdat, prefixdata, personalityfn]
     Vals.push_back(VE.getTypeID(F.getFunctionType()));
     Vals.push_back(F.getCallingConv());
     Vals.push_back(F.isDeclaration());
@@ -712,6 +712,8 @@ static void WriteModuleInfo(const Module *M, const ValueEnumerator &VE,
     Vals.push_back(F.hasComdat() ? VE.getComdatID(F.getComdat()) : 0);
     Vals.push_back(F.hasPrefixData() ? (VE.getValueID(F.getPrefixData()) + 1)
                                      : 0);
+    Vals.push_back(
+        F.hasPersonalityFn() ? (VE.getValueID(F.getPersonalityFn()) + 1) : 0);
 
     unsigned AbbrevToUse = 0;
     Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals, AbbrevToUse);
@@ -1859,7 +1861,6 @@ static void WriteInstruction(const Instruction &I, unsigned InstID,
     const LandingPadInst &LP = cast<LandingPadInst>(I);
     Code = bitc::FUNC_CODE_INST_LANDINGPAD;
     Vals.push_back(VE.getTypeID(LP.getType()));
-    PushValueAndType(LP.getPersonalityFn(), InstID, Vals, VE);
     Vals.push_back(LP.isCleanup());
     Vals.push_back(LP.getNumClauses());
     for (unsigned I = 0, E = LP.getNumClauses(); I != E; ++I) {
diff --git a/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp b/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp
index 74d4dd89bb4..fbbe93f6877 100644
--- a/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp
+++ b/llvm/lib/Bitcode/Writer/ValueEnumerator.cpp
@@ -93,6 +93,9 @@ static OrderMap orderModule(const Module &M) {
     if (F.hasPrologueData())
       if (!isa<GlobalValue>(F.getPrologueData()))
         orderValue(F.getPrologueData(), OM);
+    if (F.hasPersonalityFn())
+      if (!isa<GlobalValue>(F.getPersonalityFn()))
+        orderValue(F.getPersonalityFn(), OM);
   }
   OM.LastGlobalConstantID = OM.size();
 
@@ -274,6 +277,8 @@ static UseListOrderStack predictUseListOrder(const Module &M) {
       predictValueUseListOrder(F.getPrefixData(), nullptr, OM, Stack);
     if (F.hasPrologueData())
       predictValueUseListOrder(F.getPrologueData(), nullptr, OM, Stack);
+    if (F.hasPersonalityFn())
+      predictValueUseListOrder(F.getPersonalityFn(), nullptr, OM, Stack);
   }
 
   return Stack;
@@ -326,6 +331,11 @@ ValueEnumerator::ValueEnumerator(const Module &M,
     if (F.hasPrologueData())
       EnumerateValue(F.getPrologueData());
 
+  // Enumerate the personality functions.
+  for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
+    if (I->hasPersonalityFn())
+      EnumerateValue(I->getPersonalityFn());
+
   // Enumerate the metadata type.
   //
   // TODO: Move this to ValueEnumerator::EnumerateOperandType() once bitcode