From 0b57cec536236d46e3dba9bd041533462f33dbb7 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Fri, 20 Dec 2019 19:53:05 +0000
Subject: Move all sources from the llvm project into contrib/llvm-project.

This uses the new layout of the upstream repository, which was recently
migrated to GitHub, and converted into a "monorepo".  That is, most of
the earlier separate sub-projects with their own branches and tags were
consolidated into one top-level directory, and are now branched and
tagged together.

Updating the vendor area to match this layout is next.
---
 contrib/llvm-project/llvm/lib/IR/Operator.cpp | 63 +++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 contrib/llvm-project/llvm/lib/IR/Operator.cpp

(limited to 'contrib/llvm-project/llvm/lib/IR/Operator.cpp')

diff --git a/contrib/llvm-project/llvm/lib/IR/Operator.cpp b/contrib/llvm-project/llvm/lib/IR/Operator.cpp
new file mode 100644
index 000000000000..8ba68674d50e
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/IR/Operator.cpp
@@ -0,0 +1,63 @@
+//===-- Operator.cpp - Implement the LLVM operators -----------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the non-inline methods for the LLVM Operator classes.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/IR/Operator.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/GetElementPtrTypeIterator.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/Type.h"
+
+#include "ConstantsContext.h"
+
+namespace llvm {
+Type *GEPOperator::getSourceElementType() const {
+  if (auto *I = dyn_cast<GetElementPtrInst>(this))
+    return I->getSourceElementType();
+  return cast<GetElementPtrConstantExpr>(this)->getSourceElementType();
+}
+
+Type *GEPOperator::getResultElementType() const {
+  if (auto *I = dyn_cast<GetElementPtrInst>(this))
+    return I->getResultElementType();
+  return cast<GetElementPtrConstantExpr>(this)->getResultElementType();
+}
+
+bool GEPOperator::accumulateConstantOffset(const DataLayout &DL,
+                                           APInt &Offset) const {
+  assert(Offset.getBitWidth() ==
+             DL.getIndexSizeInBits(getPointerAddressSpace()) &&
+         "The offset bit width does not match DL specification.");
+
+  for (gep_type_iterator GTI = gep_type_begin(this), GTE = gep_type_end(this);
+       GTI != GTE; ++GTI) {
+    ConstantInt *OpC = dyn_cast<ConstantInt>(GTI.getOperand());
+    if (!OpC)
+      return false;
+    if (OpC->isZero())
+      continue;
+
+    // Handle a struct index, which adds its field offset to the pointer.
+    if (StructType *STy = GTI.getStructTypeOrNull()) {
+      unsigned ElementIdx = OpC->getZExtValue();
+      const StructLayout *SL = DL.getStructLayout(STy);
+      Offset += APInt(Offset.getBitWidth(), SL->getElementOffset(ElementIdx));
+      continue;
+    }
+
+    // For array or vector indices, scale the index by the size of the type.
+    APInt Index = OpC->getValue().sextOrTrunc(Offset.getBitWidth());
+    Offset += Index * APInt(Offset.getBitWidth(),
+                            DL.getTypeAllocSize(GTI.getIndexedType()));
+  }
+  return true;
+}
+}
-- 
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