Patch by Ron Ofir.

llvm-svn: 189151

 - "clang -O3 -flto a.c -c", and 
 - "clang -emit-llvm a.c -c" 

Thank Rafael for tips.

llvm-svn: 189150

We now saturate at -O3.

llvm-svn: 189149

One step toward differentiating following two commands:
   clang -O3 -flto a.c -c, and 
   clang -O3 -emit-llvm a.c

Thanks many awesome folks for clarifying things. 

llvm-svn: 189148

The debug flag being checked for seems to be controlled by whether the
build is asserts/non-asserts rather than debug/non-debug. Mostly these
correlate, but not necessarily.

As far as I can tell with various combinations of debug/assetions this
change makes no difference on autotools builds, but fixes a check-all
failure with CMake.

llvm-svn: 189147

llvm-svn: 189146

llvm-svn: 189145

llc using the host cpu features and *waning* on unknown features is probably
not a good thing :-(

llvm-svn: 189144

llvm-svn: 189143

llvm-svn: 189142

There is no advantage in being different and using the same names simplifies
clang a bit.

llvm-svn: 189141

llvm-svn: 189140

There may be relocations that may be pointing to the section
even if the section sizes are 0. We shouldnot ignore them
for that regard.

llvm-svn: 189139

There is no change in functionality, this uses the defined way to access
the relocation section that belongs to a particular section.

llvm-svn: 189138

typeTLV content type is used by Darwin to represent thread local
storage. A new contentType has to be made to represent ELF
thread local storage data. These have been set to

- typeThreadZeroFill (represents TBSS storage)
- typeThreadData     (represents TDATA storage)

llvm-svn: 189137

BSS atoms dont take any file space in the Input file. They are associated
with a contentType(typeZeroFill). Similiar zero fill types also exist which
have the same meaning in terms of occupying file space in the Input.

These atoms have to be handled seperately when writing to the
lld's intermediate file or the lld test infrastructure.

Also adds a test.

llvm-svn: 189136

Remove _LIBCPP_DEBUG.  This was my first attempt at debug mode for libc++, and is now obsoleted by _LIBCPP_DEBUG2 (which isn't finished).

llvm-svn: 189135

llvm-svn: 189134

llvm-svn: 189133

The name of a class used in the testing files was updated to actually
be descriptive.  Patch by chris.wailes@gmail.com.

llvm-svn: 189132

llvm-svn: 189131

Since it's an llvm-internal tool, we shouldn't install it.

(This depends on Clang r189127 and lld r189128.)

llvm-svn: 189130

llvm-svn: 189129

Previously, the CMake build would look for llvm-tblgen to determine
if a directory is an LLVM build or install directory. Since we don't
want to include llvm-tblgen in the install, look for llvm-config instead,
and use that to find llvm-tblgen.

(This is the lld equivalent of Clang r189127.)

llvm-svn: 189128

Previously, the CMake build would look for llvm-tblgen to determine
if a directory is an LLVM build or install directory. Since we don't
want to include llvm-tblgen in the install, look for llvm-config instead,
and use that to find llvm-tblgen.

Differential Revision: http://llvm-reviews.chandlerc.com/D1483

llvm-svn: 189127

would cause us to concatenate these paragraphs into a single one.

The no-op whitespace churn in test/Index test happened because these tests
don't use the correct approach for testing and are more strict than required
for they are testing.

llvm-svn: 189126

It was previously not being built on Windows because the cmake file relied
on a sed script to generate a .in file that llvm-config needs.

By using cmake's configure_file function, we can get rid off the sed hack,
and also have this work on Windows.

Differential Revision: http://llvm-reviews.chandlerc.com/D1481

llvm-svn: 189125

llvm-svn: 189124

llvm-svn: 189123

llvm-svn: 189122

llvm-svn: 189121

Estimate the cyclic critical path within a single block loop. If the
acyclic critical path is longer, then the loop will exhaust OOO
resources after some number of iterations. If lag between the acyclic
critical path and cyclic critical path is longer the the time it takes
to issue those loop iterations, then aggressively schedule for
latency.

llvm-svn: 189120

llvm-svn: 189119

This will be used to compute the cyclic critical path and to
update precomputed per-node pressure differences.
In the longer term, it could also be used to speed up LiveInterval
update by avoiding visiting all global vreg users.

llvm-svn: 189118

llvm-svn: 189117

This fixes a pathological compile time problem with very large blocks
and lots of scheduling boundaries.

llvm-svn: 189116

llvm-svn: 189115

Debug mode for string.  This commit also marks the first time libc++ debug-mode has found a bug (found one in regex).  Had to play with extern templates a bit to get this to work since string is heavily used within libc++.dylib.

llvm-svn: 189114

llvm-svn: 189113

No functionality change intended.

llvm-svn: 189112