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Hiroshi Inoue 0bd906ec8f [StackColoring] Update AliasAnalysis information in stack coloring pass (part 2) 
This patch is update after the first patch (https://reviews.llvm.org/rL309651) based on the post-commit comments.

Stack coloring pass need to maintain AliasAnalysis information when merging stack slots of different types.
Actually, there is a FIXME comment in StackColoring.cpp

// FIXME: In order to enable the use of TBAA when using AA in CodeGen,
// we'll also need to update the TBAA nodes in MMOs with values
// derived from the merged allocas.

But, TBAA has been already enabled in CodeGen without fixing this pass.
The incorrect TBAA metadata results in recent failures in bootstrap test on ppc64le (PR33928) by allowing unsafe instruction scheduling.
Although we observed the problem on ppc64le, this is a platform neutral issue.

This patch makes the stack coloring pass maintains AliasAnalysis information when merging multiple stack slots.

This patch fixes PR33928.

llvm-svn: 309849
 		2017-08-02 18:16:32 +00:00
clang [ubsan] Have -fsanitize=vptr emit a null check if -fsanitize=null isn't available 2017-08-02 18:10:31 +00:00
clang-tools-extra Adapt clang-tidy checks to changing semantics of hasDeclaration. 2017-08-02 13:13:11 +00:00
compiler-rt This ppc64 implementation of clear_cache works for both big and little endian. 2017-08-02 18:13:59 +00:00
debuginfo-tests Add a test for PR33166. 2017-05-25 19:33:16 +00:00
libclc configure.py: Make python3 friendly 2017-08-02 15:00:59 +00:00
libcxx Fix PR33727: std::basic_stringbuf only works with DefaultConstructible allocators. Thanks to Jonathan Wakely for the report and suggested fix 2017-08-02 17:31:09 +00:00
libcxxabi [demangler] Fix another bug found by oss-fuzz in r309340 2017-08-01 02:38:41 +00:00
libunwind Partial fix for PR33858 2017-07-26 18:13:57 +00:00
lld Use more consistent names 2017-08-02 17:35:18 +00:00
lldb Fix ProcessAPITestCase.test_get_process_info 2017-08-02 10:12:12 +00:00
llgo irgen: Create functions instead of global variables for builtin hash and equal algorithms. 2017-06-04 22:11:28 +00:00
llvm [StackColoring] Update AliasAnalysis information in stack coloring pass (part 2) 2017-08-02 18:16:32 +00:00
openmp Fix comments and build messages concerning TSX 2017-07-28 19:05:17 +00:00
parallel-libs [Axccel] Remove -Wno-missing-braces in build 2016-12-19 21:34:07 +00:00
polly Fix code format on r309826 2017-08-02 17:56:39 +00:00