1 files changed, 96 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/MC/MCDisassembler/MCDisassembler.cpp b/contrib/llvm-project/llvm/lib/MC/MCDisassembler/MCDisassembler.cpp
new file mode 100644
index 000000000000..cf98cb8ff59f
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/MC/MCDisassembler/MCDisassembler.cpp
@@ -0,0 +1,96 @@
+//===- MCDisassembler.cpp - Disassembler interface ------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCDisassembler/MCDisassembler.h"
+#include "llvm/ADT/ArrayRef.h"
+
+using namespace llvm;
+
+MCDisassembler::~MCDisassembler() = default;
+
+Optional<MCDisassembler::DecodeStatus>
+MCDisassembler::onSymbolStart(SymbolInfoTy &Symbol, uint64_t &Size,
+                              ArrayRef<uint8_t> Bytes, uint64_t Address,
+                              raw_ostream &CStream) const {
+  return None;
+}
+
+bool MCDisassembler::tryAddingSymbolicOperand(MCInst &Inst, int64_t Value,
+                                              uint64_t Address, bool IsBranch,
+                                              uint64_t Offset, uint64_t OpSize,
+                                              uint64_t InstSize) const {
+  if (Symbolizer)
+    return Symbolizer->tryAddingSymbolicOperand(Inst, *CommentStream, Value,
+                                                Address, IsBranch, Offset,
+                                                OpSize, InstSize);
+  return false;
+}
+
+void MCDisassembler::tryAddingPcLoadReferenceComment(int64_t Value,
+                                                     uint64_t Address) const {
+  if (Symbolizer)
+    Symbolizer->tryAddingPcLoadReferenceComment(*CommentStream, Value, Address);
+}
+
+void MCDisassembler::setSymbolizer(std::unique_ptr<MCSymbolizer> Symzer) {
+  Symbolizer = std::move(Symzer);
+}
+
+#define SMC_PCASE(A, P)                                                         \
+  case XCOFF::XMC_##A:                                                         \
+    return P;
+
+static uint8_t getSMCPriority(XCOFF::StorageMappingClass SMC) {
+  switch (SMC) {
+    SMC_PCASE(PR, 1)
+    SMC_PCASE(RO, 1)
+    SMC_PCASE(DB, 1)
+    SMC_PCASE(GL, 1)
+    SMC_PCASE(XO, 1)
+    SMC_PCASE(SV, 1)
+    SMC_PCASE(SV64, 1)
+    SMC_PCASE(SV3264, 1)
+    SMC_PCASE(TI, 1)
+    SMC_PCASE(TB, 1)
+    SMC_PCASE(RW, 1)
+    SMC_PCASE(TC0, 0)
+    SMC_PCASE(TC, 1)
+    SMC_PCASE(TD, 1)
+    SMC_PCASE(DS, 1)
+    SMC_PCASE(UA, 1)
+    SMC_PCASE(BS, 1)
+    SMC_PCASE(UC, 1)
+    SMC_PCASE(TL, 1)
+    SMC_PCASE(UL, 1)
+    SMC_PCASE(TE, 1)
+#undef SMC_PCASE
+  }
+  return 0;
+}
+
+/// The function is for symbol sorting when symbols have the same address.
+/// The symbols in the same section are sorted in ascending order.
+/// llvm-objdump -D will choose the highest priority symbol to display when
+/// there are symbols with the same address.
+bool XCOFFSymbolInfo::operator<(const XCOFFSymbolInfo &SymInfo) const {
+  // Label symbols have higher priority than non-label symbols.
+  if (IsLabel != SymInfo.IsLabel)
+    return SymInfo.IsLabel;
+
+  // Symbols with a StorageMappingClass have higher priority than those without.
+  if (StorageMappingClass.has_value() !=
+      SymInfo.StorageMappingClass.has_value())
+    return SymInfo.StorageMappingClass.has_value();
+
+  if (StorageMappingClass) {
+    return getSMCPriority(StorageMappingClass.value()) <
+           getSMCPriority(SymInfo.StorageMappingClass.value());
+  }
+
+  return false;
+}