Add support for disabling llvm.lifetime intrinsics in the AlwaysInliner. These

are optimization hints, but at -O0 we're not optimizing.  This becomes a problem
when the alwaysinline attribute is abused.
rdar://10921594



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151429 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 8 insertions, 4 deletions

diff --git a/include/llvm/Transforms/IPO.h b/include/llvm/Transforms/IPO.h
index f9d7f9e..18176e8 100644
--- a/include/llvm/Transforms/IPO.h
+++ b/include/llvm/Transforms/IPO.h
@@ -94,6 +94,7 @@ Pass *createFunctionInliningPass(int Threshold);
 /// createAlwaysInlinerPass - Return a new pass object that inlines only 
 /// functions that are marked as "always_inline".
 Pass *createAlwaysInlinerPass();
+Pass *createAlwaysInlinerPass(bool InsertLifetime);
 
 //===----------------------------------------------------------------------===//
 /// createPruneEHPass - Return a new pass object which transforms invoke
diff --git a/include/llvm/Transforms/IPO/InlinerPass.h b/include/llvm/Transforms/IPO/InlinerPass.h
index 3ac4c59..1feaaa4 100644
--- a/include/llvm/Transforms/IPO/InlinerPass.h
+++ b/include/llvm/Transforms/IPO/InlinerPass.h
@@ -31,7 +31,7 @@ namespace llvm {
 ///
 struct Inliner : public CallGraphSCCPass {
   explicit Inliner(char &ID);
-  explicit Inliner(char &ID, int Threshold);
+  explicit Inliner(char &ID, int Threshold, bool InsertLifetime);
 
   /// getAnalysisUsage - For this class, we declare that we require and preserve
   /// the call graph.  If the derived class implements this method, it should
@@ -87,6 +87,9 @@ private:
   // InlineThreshold - Cache the value here for easy access.
   unsigned InlineThreshold;
 
+  // InsertLifetime - Insert @llvm.lifetime intrinsics.
+  bool InsertLifetime;
+
   /// shouldInline - Return true if the inliner should attempt to
   /// inline at the given CallSite.
   bool shouldInline(CallSite CS);
diff --git a/include/llvm/Transforms/Utils/Cloning.h b/include/llvm/Transforms/Utils/Cloning.h
index 16ff7cf..b7b5d29 100644
--- a/include/llvm/Transforms/Utils/Cloning.h
+++ b/include/llvm/Transforms/Utils/Cloning.h
@@ -197,9 +197,9 @@ public:
 /// exists in the instruction stream.  Similarly this will inline a recursive
 /// function by one level.
 ///
-bool InlineFunction(CallInst *C, InlineFunctionInfo &IFI);
-bool InlineFunction(InvokeInst *II, InlineFunctionInfo &IFI);
-bool InlineFunction(CallSite CS, InlineFunctionInfo &IFI);
+bool InlineFunction(CallInst *C, InlineFunctionInfo &IFI, bool InsertLifetime = true);
+bool InlineFunction(InvokeInst *II, InlineFunctionInfo &IFI, bool InsertLifetime = true);
+bool InlineFunction(CallSite CS, InlineFunctionInfo &IFI, bool InsertLifetime = true);
 
 } // End llvm namespace