Introduce __builtin_nontemporal_store and __builtin_nontemporal_load.

Summary:
Currently clang provides no general way to generate nontemporal loads/stores.
There are some architecture specific builtins for doing so (e.g. in x86), but
there is no way to generate non-temporal store on, e.g. AArch64. This patch adds
generic builtins which are expanded to a simple store with '!nontemporal'
attribute in IR.

Differential Revision: http://reviews.llvm.org/D12313

llvm-svn: 247104

1 files changed, 3 insertions, 2 deletions

diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index 86154e923eb..39259329832 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -2449,7 +2449,8 @@ public:
                                   AlignmentSource::Type,
                                 llvm::MDNode *TBAAInfo = nullptr,
                                 QualType TBAABaseTy = QualType(),
-                                uint64_t TBAAOffset = 0);
+                                uint64_t TBAAOffset = 0,
+                                bool isNontemporal = false);
 
   /// EmitLoadOfScalar - Load a scalar value from an address, taking
   /// care to appropriately convert from the memory representation to
@@ -2465,7 +2466,7 @@ public:
                          AlignmentSource AlignSource = AlignmentSource::Type,
                          llvm::MDNode *TBAAInfo = nullptr, bool isInit = false,
                          QualType TBAABaseTy = QualType(),
-                         uint64_t TBAAOffset = 0);
+                         uint64_t TBAAOffset = 0, bool isNontemporal = false);
 
   /// EmitStoreOfScalar - Store a scalar value to an address, taking
   /// care to appropriately convert from the memory representation to