llvm-6502/lib/Target/R600/MCTargetDesc
Rafael Espindola a23cc6a1ea Add r224985 back with fixes.
The fixes are to note that AArch64 has additional restrictions on when local
relocations can be used. In particular, ld64 requires that relocations to
cstring/cfstrings use linker visible symbols.

Original message:

In an assembly expression like

bar:
  .long L0 + 1

the intended semantics is that bar will contain a pointer one byte past L0.

In sections that are merged by content (strings, 4 byte constants, etc), a
single position in the section doesn't give the linker enough information.
For example, it would not be able to tell a relocation must point to the
end of a string, since that would look just like the start of the next.

The solution used in ELF to use relocation with symbols if there is a non-zero
addend.

In MachO before this patch we would just keep all symbols in some sections.

This would miss some cases (only cstrings on x86_64 were implemented) and was
inefficient since most relocations have an addend of 0 and can be represented
without the symbol.

This patch implements the non-zero addend logic for MachO too.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226503 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-19 21:11:14 +00:00
..
AMDGPUAsmBackend.cpp Add r224985 back with fixes. 2015-01-19 21:11:14 +00:00
AMDGPUELFObjectWriter.cpp R600/SI: Store constant initializer data in constant memory 2014-07-21 14:01:14 +00:00
AMDGPUFixupKinds.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
AMDGPUMCAsmInfo.cpp R600/SI: Restore PrivateGlobalPrefix to the default ELF value of ".L" 2014-12-06 05:34:34 +00:00
AMDGPUMCAsmInfo.h Move getNonexecutableStackSection up to the base ELF class. 2014-10-15 15:44:16 +00:00
AMDGPUMCCodeEmitter.cpp
AMDGPUMCCodeEmitter.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
AMDGPUMCTargetDesc.cpp [cleanup] Re-sort all the #include lines in LLVM using 2015-01-14 11:23:27 +00:00
AMDGPUMCTargetDesc.h R600/SI: Add a stub GCNTargetMachine 2015-01-06 18:00:21 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile
R600MCCodeEmitter.cpp
SIMCCodeEmitter.cpp [cleanup] Re-sort all the #include lines in LLVM using 2015-01-14 11:23:27 +00:00