llvm-svn: 177297

llvm-svn: 177296

This commit fixes an assert that would occur on loops with large constant counts
(like looping for ((uint32_t) -1) iterations on PPC64). The existing code did
not handle counts that it computed to be negative (asserting instead), but
these can be created with valid inputs.

This bug was discovered by bugpoint while I was attempting to isolate a
completely different problem.

Also, in writing test cases for the negative-count problem, I discovered that
the ori/lsi handling was broken (there was a typo which caused the logic that
was supposed to detect these pairs and extract the iteration count to always
fail). This has now also been corrected (and is covered by one of the new test
cases).

llvm-svn: 177295

Because the initial-value constants had not been added to the list
of instructions considered for DCE the resulting code had redundant
constant-materialization instructions.

llvm-svn: 177294

llvm-svn: 177293

llvm-svn: 177292

llvm-svn: 177291

The always-true "(int)Int == (signed)Int" comparison was found
while experimenting with a potential new Clang warning.

llvm-svn: 177290

greatly reduces memory consumption

llvm-svn: 177289

llvm-svn: 177288

llvm-svn: 177287

llvm-svn: 177286

llvm-svn: 177284

When annotating "lines" starting with ":", clang-format would segfault.
This could actually happen in valid code, e.g.
  #define A :

llvm-svn: 177283

llvm-svn: 177282

And enables SmallVector's pod optimizations.

llvm-svn: 177281

llvm-svn: 177280

we weren't differntiating floating-point zeroinitializers from other zero-initializers)
which was causing problems for code relying upon a + (+0.0f) to, eg, flush denormals to
0. Make the scalar and vector cases have the same behaviour.

llvm-svn: 177279

llvm-svn: 177278

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
llvm-svn: 177277

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
llvm-svn: 177276

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
llvm-svn: 177275

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
llvm-svn: 177274

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
llvm-svn: 177273

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
llvm-svn: 177272

Unfortunately the previous fix for inserting waits for unordered
defines wasn't sufficient, cause it's possible that even ordered
defines are only partially used (or not used at all).

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
llvm-svn: 177271

llvm-svn: 177270

llvm-svn: 177269

Clang does not like classes with virtual functions but w/o virtual dtor.
Go does not like libstdc++ (operator delete).

llvm-svn: 177267

llvm-svn: 177265

[asan] when creating string constants, set unnamed_attr and align 1 so that equal strings are merged by the linker. Observed up to 1% binary size reduction. Thanks to Anton Korobeynikov for the suggestion

llvm-svn: 177264

llvm-svn: 177263

llvm-svn: 177262

llvm-svn: 177261

llvm-svn: 177260

SmallVector and DenseMap.

This speeds up SROA by 25% on PR15412.

llvm-svn: 177259

llvm-svn: 177258

MinGW is almost completely compatible to MSVC, with the exception of the _tls_array global not being available.

Patch by David Nadlinger!

llvm-svn: 177257

The linker sorts the .tls$<xyz> sections by name, and we need
to make sure any extra sections we produce (e.g. for weak globals) 
always end up between .tls$AAA and .tls$ZZZ, even if the name 
starts with e.g. an underscore.

Patch by David Nadlinger!

llvm-svn: 177256

llvm-svn: 177255