Rip all of the global variable lowering logic out of TargetAsmInfo. Since

it is highly specific to the object file that will be generated in the end,
this introduces a new TargetLoweringObjectFile interface that is implemented
for each of ELF/MachO/COFF/Alpha/PIC16 and XCore.

Though still is still a brutal and ugly refactoring, this is a major step
towards goodness.

This patch also:
1. fixes a bunch of dangling pointer problems in the PIC16 backend.
2. disables the TargetLowering copy ctor which PIC16 was accidentally using.
3. gets us closer to xcore having its own crazy target section flags and
   pic16 not having to shadow sections with its own objects.
4. fixes wierdness where ELF targets would set CStringSection but not
   CStringSection_.  Factor the code better.
5. fixes some bugs in string lowering on ELF targets.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77294 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 32 insertions, 0 deletions

diff --git a/lib/Target/XCore/XCoreTargetObjectFile.cpp b/lib/Target/XCore/XCoreTargetObjectFile.cpp
new file mode 100644
index 0000000000..89880c29f4
--- /dev/null
+++ b/lib/Target/XCore/XCoreTargetObjectFile.cpp
@@ -0,0 +1,32 @@
+//===-- XCoreTargetObjectFile.cpp - XCore object files --------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "XCoreTargetObjectFile.h"
+using namespace llvm;
+
+
+XCoreTargetObjectFile::XCoreTargetObjectFile(bool isXS1A) {
+  TextSection = getOrCreateSection("\t.text", true, SectionKind::Text);
+  DataSection = getOrCreateSection("\t.dp.data", false, SectionKind::DataRel);
+  BSSSection_ = getOrCreateSection("\t.dp.bss", false, SectionKind::BSS);
+  
+  // TLS globals are lowered in the backend to arrays indexed by the current
+  // thread id. After lowering they require no special handling by the linker
+  // and can be placed in the standard data / bss sections.
+  TLSDataSection = DataSection;
+  TLSBSSSection = BSSSection_;
+  
+  if (isXS1A)
+    // FIXME: Why is this writable ("datarel")???
+    ReadOnlySection = getOrCreateSection("\t.dp.rodata", false,
+                                         SectionKind::DataRel);
+  else
+    ReadOnlySection = getOrCreateSection("\t.cp.rodata", false,
+                                         SectionKind::ReadOnly);
+}
\ No newline at end of file