Ulrich Weigand b664c03f18 [PowerPC] Revert r185476 and fix up TLS variant kinds ... In the commit message to r185476 I wrote: >The PowerPC-specific modifiers VK_PPC_TLSGD and VK_PPC_TLSLD >correspond exactly to the generic modifiers VK_TLSGD and VK_TLSLD. >This causes some confusion with the asm parser, since VK_PPC_TLSGD >is output as @tlsgd, which is then read back in as VK_TLSGD. > >To avoid this confusion, this patch removes the PowerPC-specific >modifiers and uses the generic modifiers throughout. (The only >drawback is that the generic modifiers are printed in upper case >while the usual convention on PowerPC is to use lower-case modifiers. >But this is just a cosmetic issue.) This was unfortunately incorrect, there is is fact another, serious drawback to using the default VK_TLSLD/VK_TLSGD variant kinds: using these causes ELFObjectWriter::RelocNeedsGOT to return true, which in turn causes the ELFObjectWriter to emit an undefined reference to _GLOBAL_OFFSET_TABLE_. This is a problem on powerpc64, because it uses the TOC instead of the GOT, and the linker does not provide _GLOBAL_OFFSET_TABLE_, so the symbol remains undefined. This means shared libraries using TLS built with the integrated assembler are currently broken. While the whole RelocNeedsGOT / _GLOBAL_OFFSET_TABLE_ situation probably ought to be properly fixed at some point, for now I'm simply reverting the r185476 commit. Now this in turn exposes the breakage of handling @tlsgd/@tlsld in the asm parser that this check-in was originally intended to fix. To avoid this regression, I'm also adding a different fix for this problem: while common code now parses @tlsgd as VK_TLSGD, a special hack in the asm parser translates this code to the platform-specific VK_PPC_TLSGD that the back-end now expects. While this is not really pretty, it's self-contained and shouldn't hurt anything else for now. One the underlying problem is fixed, this hack can be reverted again. llvm-svn: 185945		2013-07-09 16:41:09 +00:00
..
ADT	Revert r185852.	2013-07-08 20:27:34 +00:00
Analysis	Fix a SCEV update problem.	2013-07-08 17:33:13 +00:00
Assembly
Bitcode	Move lib/Archive to tools/llvm-ar.	2013-06-17 15:47:20 +00:00
CodeGen	Remove dead function.	2013-07-05 23:04:55 +00:00
Config	Find xdot or xdot.py.	2013-07-08 20:24:54 +00:00
DebugInfo	llvm-dwarfdump: Add support for dumping the .debug_loc section	2013-06-19 21:37:13 +00:00
ExecutionEngine	Revising the MCJIT ObjectCache interface to allow subclasses to avoid retaining references to returned objects	2013-06-28 21:40:16 +00:00
IR	Fix a bug in IRBuilder::ClearInsertionPoint. The IR Builder needs to reset both the BB and the insert point inside the BB.	2013-07-08 23:27:43 +00:00
IRReader
MC	[PowerPC] Revert r185476 and fix up TLS variant kinds	2013-07-09 16:41:09 +00:00
Object	Add missing getters. They will be used in llvm-ar.	2013-07-09 12:49:24 +00:00
Option	Merge changes to clang's Driver code into LLVM's Option library	2013-06-13 18:12:12 +00:00
Support	Revert r185852.	2013-07-08 20:27:34 +00:00
TableGen	Fix up some asserts that are within an if statement. This removes the need	2013-07-01 23:42:53 +00:00
Target	[SystemZ] Remove no-op MVCs	2013-07-05 14:38:48 +00:00
Transforms	Remove limitation on DebugIR that made it require existing debug metadata.	2013-06-28 19:05:23 +00:00
AutoUpgrade.h
CMakeLists.txt
DebugInfo.h	Revert "DebugInfo: remove unused helper function getDICompositeType."	2013-07-09 00:16:56 +00:00
DIBuilder.h	Rename DIBuilder::createNullPtrType to createUnspecifiedType and introduce	2013-06-27 22:50:59 +00:00
GVMaterializer.h
InitializePasses.h	Remove the simplify-libcalls pass (finally)	2013-06-20 19:48:07 +00:00
InstVisitor.h
LinkAllIR.h
LinkAllPasses.h	Remove the simplify-libcalls pass (finally)	2013-06-20 19:48:07 +00:00
Linker.h
Pass.h
PassAnalysisSupport.h
PassManager.h
PassManagers.h
PassRegistry.h
PassSupport.h