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llvm-6502/lib/Target/XCore
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Rafael Espindola f165cf7ce8 Prevent alias from pointing to weak aliases. 
This adds back r204781.

Original message:

Aliases are just another name for a position in a file. As such, the
regular symbol resolutions are not applied. For example, given

define void @my_func() {
  ret void
}
@my_alias = alias weak void ()* @my_func
@my_alias2 = alias void ()* @my_alias

We produce without this patch:

        .weak   my_alias
my_alias = my_func
        .globl  my_alias2
my_alias2 = my_alias

That is, in the resulting ELF file my_alias, my_func and my_alias are
just 3 names pointing to offset 0 of .text. That is *not* the
semantics of IR linking. For example, linking in a

@my_alias = alias void ()* @other_func

would require the strong my_alias to override the weak one and
my_alias2 would end up pointing to other_func.

There is no way to represent that with aliases being just another
name, so the best solution seems to be to just disallow it, converting
a miscompile into an error.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204934 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-27 15:26:56 +00:00
..
Disassembler
InstPrinter
MCTargetDesc Switch all uses of LLVM_OVERRIDE to just use 'override' directly. 2014-03-02 09:09:27 +00:00
TargetInfo Prune redundant dependencies in LLVMBuild.txt. 2013-12-11 00:30:57 +00:00
CMakeLists.txt XCore target: Lower FRAME_TO_ARGS_OFFSET 2014-01-06 14:21:00 +00:00
LLVMBuild.txt Add proper dependencies to LLVMBuild.txt in llvm/lib. 2013-12-10 05:39:34 +00:00
Makefile
README.txt
XCore.h XCore target: Lower FRAME_TO_ARGS_OFFSET 2014-01-06 14:21:00 +00:00
XCore.td Change the default of AsmWriterClassName and isMCAsmWriter. 2013-12-02 04:55:42 +00:00
XCoreAsmPrinter.cpp [XCore] Add support for the "m" inline asm constraint. 2014-03-06 16:37:48 +00:00
XCoreCallingConv.td [XCore] Support functions returning more than 4 words. 2014-02-27 17:47:54 +00:00
XCoreFrameLowering.cpp Replace PROLOG_LABEL with a new CFI_INSTRUCTION. 2014-03-07 06:08:31 +00:00
XCoreFrameLowering.h XCore target: Make handling of large frames not dependent upon an FP. 2013-12-02 11:05:28 +00:00
XCoreFrameToArgsOffsetElim.cpp Remove dead code. 2014-01-06 18:14:34 +00:00
XCoreInstrFormats.td
XCoreInstrInfo.cpp XCore target: addMemOperand as necessary 2014-02-18 11:21:53 +00:00
XCoreInstrInfo.h XCore target: Refactor the loading of constants into a register 2014-01-06 14:20:37 +00:00
XCoreInstrInfo.td [XCore] Fix call of absolute address. 2014-03-04 16:50:30 +00:00
XCoreISelDAGToDAG.cpp [XCore] Add support for the "m" inline asm constraint. 2014-03-06 16:37:48 +00:00
XCoreISelLowering.cpp Prevent alias from pointing to weak aliases. 2014-03-27 15:26:56 +00:00
XCoreISelLowering.h [XCore] Support functions returning more than 4 words. 2014-02-27 17:47:54 +00:00
XCoreLowerThreadLocal.cpp [C++11] Add range based accessors for the Use-Def chain of a Value. 2014-03-09 03:16:01 +00:00
XCoreMachineFunctionInfo.cpp XCore target: Fix llvm.eh.return and EH info register handling 2014-02-18 11:21:48 +00:00
XCoreMachineFunctionInfo.h Replace PROLOG_LABEL with a new CFI_INSTRUCTION. 2014-03-07 06:08:31 +00:00
XCoreMCInstLower.cpp Move the llvm mangler to lib/IR. 2014-01-07 21:19:40 +00:00
XCoreMCInstLower.h
XCoreRegisterInfo.cpp XCore target: addMemOperand as necessary 2014-02-18 11:21:53 +00:00
XCoreRegisterInfo.h XCore target: Make handling of large frames not dependent upon an FP. 2013-12-02 11:05:28 +00:00
XCoreRegisterInfo.td
XCoreSelectionDAGInfo.cpp [XCore] Target optimized library function __memcpy_4() 2014-02-27 13:39:07 +00:00
XCoreSelectionDAGInfo.h [XCore] Target optimized library function __memcpy_4() 2014-02-27 13:39:07 +00:00
XCoreSubtarget.cpp
XCoreSubtarget.h
XCoreTargetMachine.cpp XCore target: Lower FRAME_TO_ARGS_OFFSET 2014-01-06 14:21:00 +00:00
XCoreTargetMachine.h
XCoreTargetObjectFile.cpp Add back r201608, r201622, r201624 and r201625 2014-02-19 17:23:20 +00:00
XCoreTargetObjectFile.h Switch all uses of LLVM_OVERRIDE to just use 'override' directly. 2014-03-02 09:09:27 +00:00
XCoreTargetStreamer.h XCore: Fix typo in function name. 2014-01-27 11:50:13 +00:00
XCoreTargetTransformInfo.cpp [TTI] There is actually no realistic way to pop TTI implementations off 2014-03-10 02:45:14 +00:00

README.txt 

To-do
-----

* Instruction encodings
* Tailcalls
* Investigate loop alignment
* Add builtins