Add support for invoke to the MemoryBuiltin analysid.

Update comments accordingly.

Make instcombine remove useless invokes to C++'s 'new' allocation function (test attached).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158937 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 7 insertions, 2 deletions

diff --git a/lib/Transforms/InstCombine/InstCombineCalls.cpp b/lib/Transforms/InstCombine/InstCombineCalls.cpp
index ed38829111..b638cc27dd 100644
--- a/lib/Transforms/InstCombine/InstCombineCalls.cpp
+++ b/lib/Transforms/InstCombine/InstCombineCalls.cpp
@@ -172,8 +172,6 @@ Instruction *InstCombiner::SimplifyMemSet(MemSetInst *MI) {
 Instruction *InstCombiner::visitCallInst(CallInst &CI) {
   if (isFreeCall(&CI))
     return visitFree(CI);
-  if (isAllocLikeFn(&CI))
-    return visitMalloc(CI);
 
   // If the caller function is nounwind, mark the call as nounwind, even if the
   // callee isn't.
@@ -881,6 +879,9 @@ static IntrinsicInst *FindInitTrampoline(Value *Callee) {
 // visitCallSite - Improvements for call and invoke instructions.
 //
 Instruction *InstCombiner::visitCallSite(CallSite CS) {
+  if (isAllocLikeFn(CS.getInstruction()))
+    return visitMalloc(*CS.getInstruction());
+
   bool Changed = false;
 
   // If the callee is a pointer to a function, attempt to move any casts to the
diff --git a/lib/Transforms/InstCombine/InstructionCombining.cpp b/lib/Transforms/InstCombine/InstructionCombining.cpp
index 2653fc316d..269ea1516f 100644
--- a/lib/Transforms/InstCombine/InstructionCombining.cpp
+++ b/lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -1167,6 +1167,10 @@ Instruction *InstCombiner::visitMalloc(Instruction &MI) {
       }
       EraseInstFromFunction(*I);
     }
+
+    if (InvokeInst *II = dyn_cast<InvokeInst>(&MI)) {
+      BranchInst::Create(II->getNormalDest(), II->getParent());
+    }
     return EraseInstFromFunction(MI);
   }
   return 0;