[safestack] Fast access to the unsafe stack pointer on AArch64/Android.

[oota-llvm.git] / include / llvm / Target / TargetLowering.h

diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h
index caf28d2b118b1e6536864c34a75d004d10f3ae3b..310091ca2b683f46fb14d1a5c868457e74f208a0 100644 (file)
--- a/include/llvm/Target/TargetLowering.h
+++ b/include/llvm/Target/TargetLowering.h
@@ -885,7 +885,7 @@ public:
   bool allowsMemoryAccess(LLVMContext &Context, const DataLayout &DL, EVT VT,
                           unsigned AddrSpace = 0, unsigned Alignment = 1,
                           bool *Fast = nullptr) const;
-  
+
   /// Returns the target specific optimal type for load and store operations as
   /// a result of memset, memcpy, and memmove lowering.
   ///
@@ -995,6 +995,10 @@ public:
     return false;
   }
 
+  /// If the target has a standard location for the unsafe stack pointer,
+  /// returns the address of that location. Otherwise, returns nullptr.
+  virtual Value *getSafeStackPointerLocation(IRBuilder<> &IRB) const;
+
   /// Returns true if a cast between SrcAS and DestAS is a noop.
   virtual bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const {
     return false;
@@ -1712,6 +1716,12 @@ public:
     return false;
   }
 
+  // Return true if it is profitable to use a scalar input to a BUILD_VECTOR
+  // even if the vector itself has multiple uses.
+  virtual bool aggressivelyPreferBuildVectorSources(EVT VecVT) const {
+    return false;
+  }
+
   //===--------------------------------------------------------------------===//
   // Runtime Library hooks
   //