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Sanjay Patel bbbf9a1a34 merge vector stores into wider vector stores and fix AArch64 misaligned access TLI hook (PR21711) 
This is a redo of D7208 ( r227242 - http://llvm.org/viewvc/llvm-project?view=revision&revision=227242 ).

The patch was reverted because an AArch64 target could infinite loop after the change in DAGCombiner 
to merge vector stores. That happened because AArch64's allowsMisalignedMemoryAccesses() wasn't telling
the truth. It reported all unaligned memory accesses as fast, but then split some 128-bit unaligned
accesses up in performSTORECombine() because they are slow.

This patch attempts to fix the problem in AArch's allowsMisalignedMemoryAccesses() while preserving
existing (perhaps questionable) lowering behavior.

The x86 test shows that store merging is working as intended for a target with fast 32-byte unaligned
stores.

Differential Revision: http://reviews.llvm.org/D12635
 

llvm-svn: 248622
 		2015-09-25 21:49:48 +00:00
clang Fix bug on reporting availability of deleted methods in libclang. 2015-09-25 17:53:16 +00:00
clang-tools-extra [clang-tidy] Updated misc-unused-raii documentation. 2015-09-25 17:50:11 +00:00
compiler-rt [CMake] [darwin] [cc_kext] In addition to builtin sources the cc_kext builtins include some functions from clang_rt.profile. 2015-09-24 22:29:58 +00:00
debuginfo-tests New round of fixes for "Always compile debuginfo-tests for the host triple" 2014-10-18 23:47:59 +00:00
libclc Add sampler defines. 2015-09-21 14:59:58 +00:00
libcxx Fix Typo in GCC no RTTI detection. Fixes PR#24901. Thanks to Bernhard Rosenkraenzer for the report and the patch. 2015-09-22 21:58:30 +00:00
libcxxabi Let cxa_demangle.cpp compile with gcc/libstdc++ 4.8 and clang-cl/MSVC2013's STL. 2015-09-20 18:10:46 +00:00
libunwind unwind: cleanup -Wunused-parameter 2015-09-01 04:29:03 +00:00
lld ELF/AMDGPU: Text section should be called .hsatext 2015-09-25 21:42:30 +00:00
lldb Moved more Clang-specific parts of the expression parser into the Clang plugin. 2015-09-25 20:35:58 +00:00
llgo [llgo] irgen: always use TargetMachine's data layout 2015-09-25 06:28:14 +00:00
llvm merge vector stores into wider vector stores and fix AArch64 misaligned access TLI hook (PR21711) 2015-09-25 21:49:48 +00:00
openmp Fix memory corruption in Windows debug library 2015-09-25 17:23:17 +00:00
polly Let MemoryAccess remember its purpose 2015-09-25 21:21:00 +00:00