Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/lib/Target/X86/X86ShuffleDecodeConstantPool.h

@@ -0,0 +1,52 @@
+//===-- X86ShuffleDecodeConstantPool.h - X86 shuffle decode -----*-C++-*---===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Define several functions to decode x86 specific shuffle semantics using
+// constants from the constant pool.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_X86_X86SHUFFLEDECODECONSTANTPOOL_H
+#define LLVM_LIB_TARGET_X86_X86SHUFFLEDECODECONSTANTPOOL_H
+
+#include "llvm/ADT/SmallVector.h"
+
+//===----------------------------------------------------------------------===//
+//  Vector Mask Decoding
+//===----------------------------------------------------------------------===//
+
+namespace llvm {
+class Constant;
+class MVT;
+
+/// Decode a PSHUFB mask from an IR-level vector constant.
+void DecodePSHUFBMask(const Constant *C, SmallVectorImpl<int> &ShuffleMask);
+
+/// Decode a VPERMILP variable mask from an IR-level vector constant.
+void DecodeVPERMILPMask(const Constant *C, unsigned ElSize,
+                        SmallVectorImpl<int> &ShuffleMask);
+
+/// Decode a VPERMILP2 variable mask from an IR-level vector constant.
+void DecodeVPERMIL2PMask(const Constant *C, unsigned MatchImm, unsigned ElSize,
+                         SmallVectorImpl<int> &ShuffleMask);
+
+/// Decode a VPPERM variable mask from an IR-level vector constant.
+void DecodeVPPERMMask(const Constant *C, SmallVectorImpl<int> &ShuffleMask);
+
+/// Decode a VPERM W/D/Q/PS/PD mask from an IR-level vector constant.
+void DecodeVPERMVMask(const Constant *C, unsigned ElSize,
+                      SmallVectorImpl<int> &ShuffleMask);
+
+/// Decode a VPERMT2 W/D/Q/PS/PD mask from an IR-level vector constant.
+void DecodeVPERMV3Mask(const Constant *C, unsigned ElSize,
+                       SmallVectorImpl<int> &ShuffleMask);
+
+} // llvm namespace
+
+#endif