llvm-6502/lib/Target/R600/MCTargetDesc
Rafael Espindola 8093abb745 Add r224985 back with a fix.
The issues was that AArch64 has additional restrictions on when local
relocations can be used. We have to take those into consideration when
deciding to put a L symbol in the symbol table or not.

Original message:

Remove doesSectionRequireSymbols.

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@225048 91177308-0d34-0410-b5e6-96231b3b80d8
2014-12-31 17:19:34 +00:00
..
AMDGPUAsmBackend.cpp Add r224985 back with a fix. 2014-12-31 17:19:34 +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 [weak vtables] Remove a bunch of weak vtables 2013-11-19 00:57:56 +00:00
AMDGPUMCCodeEmitter.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
AMDGPUMCTargetDesc.cpp Simplify handling of --noexecstack by using getNonexecutableStackSection. 2014-10-15 16:12:52 +00:00
AMDGPUMCTargetDesc.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
CMakeLists.txt [CMake] Let add_public_tablegen_target responsible to provide dependency to CommonTableGen. 2013-11-28 17:04:04 +00:00
LLVMBuild.txt LLVMBuild.txt: Add missing dependencies. 2014-04-10 11:16:47 +00:00
Makefile
R600MCCodeEmitter.cpp Convert some assert(0) to llvm_unreachable or fold an 'if' condition into the assert. 2014-06-19 06:10:58 +00:00
SIMCCodeEmitter.cpp R600/SI: Make sure non-inline constants aren't folded into mubuf soffset operand 2014-12-19 22:15:30 +00:00