[WebAssembly] memory.copy

Summary: Depends on D57495.

Reviewers: aheejin, dschuff

Subscribers: sbc100, jgravelle-google, hiraditya, sunfish

Differential Revision: https://reviews.llvm.org/D57498

llvm-svn: 353127

1 files changed, 39 insertions, 0 deletions

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyInstrBulkMemory.td b/llvm/lib/Target/WebAssembly/WebAssemblyInstrBulkMemory.td
new file mode 100644
index 00000000000..4642236366e
--- /dev/null
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyInstrBulkMemory.td
@@ -0,0 +1,39 @@
+// WebAssemblyInstrBulkMemory.td - bulk memory codegen support --*- tablegen -*-
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// WebAssembly bulk memory codegen constructs.
+///
+//===----------------------------------------------------------------------===//
+
+// Instruction requiring HasBulkMemory and the bulk memory prefix byte
+multiclass BULK_I<dag oops_r, dag iops_r, dag oops_s, dag iops_s,
+                  list<dag> pattern_r, string asmstr_r = "",
+                  string asmstr_s = "", bits<32> simdop = -1> {
+  defm "" : I<oops_r, iops_r, oops_s, iops_s, pattern_r, asmstr_r, asmstr_s,
+              !or(0xfc00, !and(0xff, simdop))>,
+            Requires<[HasBulkMemory]>;
+}
+
+// Bespoke types and nodes for bulk memory ops
+def wasm_memcpy_t : SDTypeProfile<0, 3,
+  [SDTCisPtrTy<0>, SDTCisPtrTy<1>, SDTCisInt<2>]
+>;
+def wasm_memcpy : SDNode<"WebAssemblyISD::MEMORY_COPY", wasm_memcpy_t,
+                         [SDNPHasChain, SDNPMayLoad, SDNPMayStore]>;
+
+//===----------------------------------------------------------------------===//
+// memory.copy
+//===----------------------------------------------------------------------===//
+
+let mayLoad = 1, mayStore = 1 in
+defm MEMORY_COPY : BULK_I<(outs), (ins I32:$dst, I32:$src, I32:$len),
+                          (outs), (ins),
+                          [(wasm_memcpy I32:$dst, I32:$src, I32:$len)],
+                          "memory.copy\t$dst, $src, $len",
+                          "memory.copy", 0x0a>;