Avoid using f64 to lower memcpy from constant string. It's cheaper to use i32 store of immediates.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100751 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 3 deletions

diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h
index 1a94b44..91d7dfa 100644
--- a/include/llvm/Target/TargetLowering.h
+++ b/include/llvm/Target/TargetLowering.h
@@ -638,11 +638,13 @@ public:
   /// probably because the source does not need to be loaded. If
   /// 'NonScalarIntSafe' is true, that means it's safe to return a
   /// non-scalar-integer type, e.g. empty string source, constant, or loaded
-  /// from memory. It returns EVT::Other if SelectionDAG should be responsible
-  /// for determining it.
+  /// from memory. 'MemcpyStrSrc' indicates whether the memcpy source is
+  /// constant so it does not need to be loaded.
+  /// It returns EVT::Other if SelectionDAG should be responsible for
+  /// determining the type.
   virtual EVT getOptimalMemOpType(uint64_t Size,
                                   unsigned DstAlign, unsigned SrcAlign,
-                                  bool NonScalarIntSafe,
+                                  bool NonScalarIntSafe, bool MemcpyStrSrc,
                                   SelectionDAG &DAG) const {
     return MVT::Other;
   }