llvm/lib/CodeGen/MachineModuleInfoImpls.cpp
Sam Clegg 46016f24b4 [WebAssembly] Use __stack_pointer global when writing wasm binary
This ensures that symbolic relocations are generated for stack
pointer manipulations.

These relocations are of type R_WEBASSEMBLY_GLOBAL_INDEX_LEB.
This change also adds support for reading relocations of this
type in WasmObjectFile.cpp.

Since its a globally imported symbol this does mean that
the get_global/set_global instruction won't be valid until
the objects are linked that global used in no longer an
imported global.

Differential Revision: https://reviews.llvm.org/D34172

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305616 91177308-0d34-0410-b5e6-96231b3b80d8
2017-06-16 23:59:10 +00:00

45 lines
1.5 KiB
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//===-- llvm/CodeGen/MachineModuleInfoImpls.cpp ---------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements object-file format specific implementations of
// MachineModuleInfoImpl.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/MC/MCSymbol.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
// MachineModuleInfoMachO
//===----------------------------------------------------------------------===//
// Out of line virtual method.
void MachineModuleInfoMachO::anchor() {}
void MachineModuleInfoELF::anchor() {}
static int SortSymbolPair(const void *LHS, const void *RHS) {
typedef std::pair<MCSymbol*, MachineModuleInfoImpl::StubValueTy> PairTy;
const MCSymbol *LHSS = ((const PairTy *)LHS)->first;
const MCSymbol *RHSS = ((const PairTy *)RHS)->first;
return LHSS->getName().compare(RHSS->getName());
}
MachineModuleInfoImpl::SymbolListTy MachineModuleInfoImpl::getSortedStubs(
DenseMap<MCSymbol *, MachineModuleInfoImpl::StubValueTy> &Map) {
MachineModuleInfoImpl::SymbolListTy List(Map.begin(), Map.end());
if (!List.empty())
qsort(&List[0], List.size(), sizeof(List[0]), SortSymbolPair);
Map.clear();
return List;
}