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James Y Knight ac03dca412 Stop increasing alignment of externally-visible globals on ELF 
platforms.

With ELF, the alignment of a global variable in a shared library will
get copied into an executables linked against it, if the executable even
accesss the variable. So, it's not possible to implicitly increase
alignment based on access patterns, or you'll break existing binaries.

This happened to affect libc++'s std::cout symbol, for example. See
thread: http://thread.gmane.org/gmane.comp.compilers.clang.devel/45311

(This is a re-commit of r257719, without the bug reported in
PR26144. I've tweaked the code to not assert-fail in
enforceKnownAlignment when computeKnownBits doesn't recurse far enough
to find the underlying Alloca/GlobalObject value.)

Differential Revision: http://reviews.llvm.org/D16145

llvm-svn: 257902
 		2016-01-15 16:33:06 +00:00
..
AsmWriter.cpp Fix crash when printing instructions that have a metadata attached but no parent. 2016-01-07 20:14:30 +00:00
AttributeImpl.h llvm/lib/IR/AttributeImpl.h: Move comment block not to cover typedef, introduced in r244164. [-Wdocumentation] 2015-08-06 09:49:17 +00:00
Attributes.cpp Use std::is_sorted and std::none_of instead of manual loops. NFC 2016-01-03 19:43:40 +00:00
AttributesCompatFunc.td Provide a way to specify inliner's attribute compatibility and merging. 2015-12-22 23:57:37 +00:00
AutoUpgrade.cpp Revert "Change memcpy/memset/memmove to have dest and source alignments." 2015-11-19 05:56:52 +00:00
BasicBlock.cpp IR: Remove implicit iterator conversions from lib/IR, NFC 2015-10-08 23:49:46 +00:00
CMakeLists.txt [ptr-traits] Merge the MetadataTracking helpers into the Metadata 2015-12-29 02:14:50 +00:00
Comdat.cpp
…
ConstantFold.cpp Use CmpInst::Predicate instead of 'unsigned short' in some places. NFC 2015-12-15 06:11:33 +00:00
ConstantFold.h Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
ConstantRange.cpp [IR] Add a `makeNoWrapRegion` method to `ConstantRange` 2015-10-22 03:12:57 +00:00
Constants.cpp [IR] Add classof for GetElementPtrConstantExpr, CompareConstantExpr, InsertValueConstantExpr, and ExtractValueConstantExpr. All but CompareConstantExpr were being used in casts that were erroneously using ConstantExpr::classof due to inheritance. While there use cast<CompareConstantExpr> to simplify code slightly. 2015-12-15 06:11:36 +00:00
ConstantsContext.h [IR] Add classof for GetElementPtrConstantExpr, CompareConstantExpr, InsertValueConstantExpr, and ExtractValueConstantExpr. All but CompareConstantExpr were being used in casts that were erroneously using ConstantExpr::classof due to inheritance. While there use cast<CompareConstantExpr> to simplify code slightly. 2015-12-15 06:11:36 +00:00
Core.cpp Remove static global GCNames from Function.cpp and move it to the Context 2016-01-08 02:28:20 +00:00
DIBuilder.cpp Macro debug info support in LLVM IR 2015-12-10 12:56:35 +00:00
DataLayout.cpp Update to use new name alignTo(). 2016-01-14 21:06:47 +00:00
DebugInfo.cpp DI: Reverse direction of subprogram -> function edge. 2015-11-05 22:03:56 +00:00
DebugInfoMetadata.cpp Macro debug info support in LLVM IR 2015-12-10 12:56:35 +00:00
DebugLoc.cpp IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
DiagnosticInfo.cpp [PGO] Resubmit "MST based PGO instrumentation infrastructure" (r254021) 2015-12-09 18:08:16 +00:00
DiagnosticPrinter.cpp MIR Serialization: Connect the machine function analysis pass to the MIR parser. 2015-06-15 20:30:22 +00:00
Dominators.cpp [IR] Reformulate LLVM's EH funclet IR 2015-12-12 05:38:55 +00:00
Function.cpp Remove static global GCNames from Function.cpp and move it to the Context 2016-01-08 02:28:20 +00:00
FunctionInfo.cpp [ThinLTO] Handle bitcode without function summary sections gracefully 2015-11-21 21:55:48 +00:00
GCOV.cpp Rename one of our two llvm::GCOVOptions classes to llvm::GCOV::Options. We used 2015-10-14 00:04:19 +00:00
GVMaterializer.cpp
…
Globals.cpp Stop increasing alignment of externally-visible globals on ELF 2016-01-15 16:33:06 +00:00
IRBuilder.cpp Revert "Change memcpy/memset/memmove to have dest and source alignments." 2015-11-19 05:56:52 +00:00
IRPrintingPasses.cpp Recommit r256952 "Filtering IR printing for print-after-all/print-before-all" 2016-01-06 22:55:03 +00:00
InlineAsm.cpp Fix SEGV in InlineAsm::ConstraintInfo::Parse. 2015-09-03 15:41:37 +00:00
Instruction.cpp fix typos; NFC 2016-01-06 00:18:29 +00:00
Instructions.cpp [OperandBundles] Copy DebugLoc with calls/invokes 2016-01-14 06:21:42 +00:00
IntrinsicInst.cpp IR: Split Metadata from Value 2014-12-09 18:38:53 +00:00
LLVMBuild.txt
…
LLVMContext.cpp Remove static global GCNames from Function.cpp and move it to the Context 2016-01-08 02:28:20 +00:00
LLVMContextImpl.cpp [IR] Manage TheNoneToken with a std::unique_ptr 2015-11-16 20:55:57 +00:00
LLVMContextImpl.h Remove static global GCNames from Function.cpp and move it to the Context 2016-01-08 02:28:20 +00:00
LegacyPassManager.cpp Recommit r256952 "Filtering IR printing for print-after-all/print-before-all" 2016-01-06 22:55:03 +00:00
MDBuilder.cpp [MDBuilder] Simplify code using initializer lists. NFC. 2015-11-22 18:03:17 +00:00
Makefile Provide a way to specify inliner's attribute compatibility and merging. 2015-12-22 23:57:37 +00:00
Mangler.cpp Update to use new name alignTo(). 2016-01-14 21:06:47 +00:00
Metadata.cpp Update to use new name alignTo(). 2016-01-14 21:06:47 +00:00
MetadataImpl.h DI: Disallow uniquable DICompileUnits 2015-08-03 17:26:41 +00:00
Module.cpp Revert "Assert that we have all use/users in the getters." 2016-01-14 09:02:45 +00:00
Operator.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
Pass.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
PassManager.cpp [PM] Push the debug option for the new pass manager into the opt tool 2015-01-13 22:42:38 +00:00
PassRegistry.cpp Revert r231276 (including r231277): Add a lock() function in PassRegistry to speed up multi-thread synchronization. 2015-03-05 17:53:00 +00:00
Statepoint.cpp [Statepoints] Refactor GCRelocateOperands into an intrinsic wrapper. NFC. 2016-01-05 04:03:00 +00:00
SymbolTableListTraitsImpl.h IR: Remove implicit iterator conversions from lib/IR, NFC 2015-10-08 23:49:46 +00:00
Type.cpp [IR] Mark the Type subclass helper methods 'inline' and move their definitions to DerivedTypes.h so they can be inlined by the compiler. 2015-12-25 04:06:20 +00:00
TypeFinder.cpp Re-reapply "[IR] Move optional data in llvm::Function into a hungoff uselist" 2015-12-19 08:52:49 +00:00
Use.cpp Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC) 2015-06-23 09:49:53 +00:00
User.cpp [IR] Teach `llvm::User` to co-allocate a descriptor. 2015-09-24 01:00:49 +00:00
Value.cpp Revert "Assert that we have all use/users in the getters." 2016-01-14 09:02:45 +00:00
ValueSymbolTable.cpp Have a single way for creating unique value names. 2015-11-22 00:16:24 +00:00
ValueTypes.cpp Add new vector types for 512-, 1024- and 2048-bit vectors 2015-11-24 13:07:35 +00:00
Verifier.cpp Once again revert debug info verifier changes 2016-01-15 02:12:38 +00:00
module.modulemap
…