1 files changed, 84 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/Target/SystemZ/SystemZSubtarget.cpp b/contrib/llvm-project/llvm/lib/Target/SystemZ/SystemZSubtarget.cpp
new file mode 100644
index 000000000000..5e8af81842c4
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/Target/SystemZ/SystemZSubtarget.cpp
@@ -0,0 +1,84 @@
+//===-- SystemZSubtarget.cpp - SystemZ subtarget information --------------===//
+//
+// 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 "SystemZSubtarget.h"
+#include "MCTargetDesc/SystemZMCTargetDesc.h"
+#include "llvm/IR/GlobalValue.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "systemz-subtarget"
+
+#define GET_SUBTARGETINFO_TARGET_DESC
+#define GET_SUBTARGETINFO_CTOR
+#include "SystemZGenSubtargetInfo.inc"
+
+static cl::opt<bool> UseSubRegLiveness(
+    "systemz-subreg-liveness",
+    cl::desc("Enable subregister liveness tracking for SystemZ (experimental)"),
+    cl::Hidden);
+
+// Pin the vtable to this file.
+void SystemZSubtarget::anchor() {}
+
+SystemZSubtarget &
+SystemZSubtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS) {
+  std::string CPUName = CPU;
+  if (CPUName.empty())
+    CPUName = "generic";
+  // Parse features string.
+  ParseSubtargetFeatures(CPUName, FS);
+  return *this;
+}
+
+SystemZSubtarget::SystemZSubtarget(const Triple &TT, const std::string &CPU,
+                                   const std::string &FS,
+                                   const TargetMachine &TM)
+    : SystemZGenSubtargetInfo(TT, CPU, FS), HasDistinctOps(false),
+      HasLoadStoreOnCond(false), HasHighWord(false), HasFPExtension(false),
+      HasPopulationCount(false), HasMessageSecurityAssist3(false),
+      HasMessageSecurityAssist4(false), HasResetReferenceBitsMultiple(false),
+      HasFastSerialization(false), HasInterlockedAccess1(false),
+      HasMiscellaneousExtensions(false),
+      HasExecutionHint(false), HasLoadAndTrap(false),
+      HasTransactionalExecution(false), HasProcessorAssist(false),
+      HasDFPZonedConversion(false), HasEnhancedDAT2(false),
+      HasVector(false), HasLoadStoreOnCond2(false),
+      HasLoadAndZeroRightmostByte(false), HasMessageSecurityAssist5(false),
+      HasDFPPackedConversion(false),
+      HasMiscellaneousExtensions2(false), HasGuardedStorage(false),
+      HasMessageSecurityAssist7(false), HasMessageSecurityAssist8(false),
+      HasVectorEnhancements1(false), HasVectorPackedDecimal(false),
+      HasInsertReferenceBitsMultiple(false),
+      HasMiscellaneousExtensions3(false), HasMessageSecurityAssist9(false),
+      HasVectorEnhancements2(false), HasVectorPackedDecimalEnhancement(false),
+      HasEnhancedSort(false), HasDeflateConversion(false),
+      TargetTriple(TT), InstrInfo(initializeSubtargetDependencies(CPU, FS)),
+      TLInfo(TM, *this), TSInfo(), FrameLowering() {}
+
+
+bool SystemZSubtarget::enableSubRegLiveness() const {
+  return UseSubRegLiveness;
+}
+
+bool SystemZSubtarget::isPC32DBLSymbol(const GlobalValue *GV,
+                                       CodeModel::Model CM) const {
+  // PC32DBL accesses require the low bit to be clear.  Note that a zero
+  // value selects the default alignment and is therefore OK.
+  if (GV->getAlignment() == 1)
+    return false;
+
+  // For the small model, all locally-binding symbols are in range.
+  if (CM == CodeModel::Small)
+    return TLInfo.getTargetMachine().shouldAssumeDSOLocal(*GV->getParent(), GV);
+
+  // For Medium and above, assume that the symbol is not within the 4GB range.
+  // Taking the address of locally-defined text would be OK, but that
+  // case isn't easy to detect.
+  return false;
+}