[AVX] Add INSERT_SUBVECTOR and support it on x86. This provides a

default implementation for x86, going through the stack in a similr
fashion to how the codegen implements BUILD_VECTOR.  Eventually this
will get matched to VINSERTF128 if AVX is available.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124307 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 9 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/ISDOpcodes.h b/include/llvm/CodeGen/ISDOpcodes.h
index ac3d87c4bd..c7edb12097 100644
--- a/include/llvm/CodeGen/ISDOpcodes.h
+++ b/include/llvm/CodeGen/ISDOpcodes.h
@@ -269,6 +269,14 @@ namespace ISD {
     /// lengths of the input vectors.
     CONCAT_VECTORS,
 
+    /// INSERT_SUBVECTOR(VECTOR1, VECTOR2, IDX) - Returns a vector
+    /// with VECTOR2 inserted into VECTOR1 at the (potentially
+    /// variable) element number IDX, which must be a multiple of the
+    /// VECTOR2 vector length.  The elements of VECTOR1 starting at
+    /// IDX are overwritten with VECTOR2.  Elements IDX through
+    /// vector_length(VECTOR2) must be valid VECTOR1 indices.
+    INSERT_SUBVECTOR,
+
     /// EXTRACT_SUBVECTOR(VECTOR, IDX) - Returns a subvector from VECTOR (an
     /// vector value) starting with the element number IDX, which must be a
     /// constant multiple of the result vector length.
diff --git a/include/llvm/Target/TargetSelectionDAG.td b/include/llvm/Target/TargetSelectionDAG.td
index e64059ea43..c9be40d23f 100644
--- a/include/llvm/Target/TargetSelectionDAG.td
+++ b/include/llvm/Target/TargetSelectionDAG.td
@@ -446,6 +446,7 @@ def vector_extract_subvec : SDNode<"ISD::EXTRACT_SUBVECTOR",
 
 // This operator does subvector type checking.
 def extract_subvector : SDNode<"ISD::EXTRACT_SUBVECTOR", SDTSubVecExtract, []>;
+def insert_subvector : SDNode<"ISD::INSERT_SUBVECTOR", SDTSubVecInsert, []>;
 
 // Nodes for intrinsics, you should use the intrinsic itself and let tblgen use
 // these internally.  Don't reference these directly.