Add a MCObjectFormat class so that code common to all targets that use a
single object format can be shared.
This also adds support for
mov zed+(bar-foo), %eax
on ELF and COFF targets.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116675 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCObjectFormat.cpp b/lib/MC/MCObjectFormat.cpp
new file mode 100644
index 0000000..07d361c
--- /dev/null
+++ b/lib/MC/MCObjectFormat.cpp
@@ -0,0 +1,31 @@
+//===- lib/MC/MCObjectFormat.cpp - MCObjectFormat implementation ----------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCObjectFormat.h"
+#include "llvm/MC/MCSymbol.h"
+
+using namespace llvm;
+
+bool MCELFObjectFormat::isAbsolute(bool IsSet, const MCSymbol &A,
+ const MCSymbol &B) const {
+ // On ELF A - B is absolute if A and B are in the same section.
+ return &A.getSection() == &B.getSection();
+}
+
+bool MCMachOObjectFormat::isAbsolute(bool IsSet, const MCSymbol &A,
+ const MCSymbol &B) const {
+ // On MachO A - B is absolute only if in a set.
+ return IsSet;
+}
+
+bool MCCOFFObjectFormat::isAbsolute(bool IsSet, const MCSymbol &A,
+ const MCSymbol &B) const {
+ // On COFF A - B is absolute if A and B are in the same section.
+ return &A.getSection() == &B.getSection();
+}