Revert unintentional commit (of an unreviewed change).

Original commit message:

Add getUnrollingPreferences to TTI

Allow targets to customize the default behavior of the generic loop unrolling
transformation. This will be used by the PowerPC backend when targeting the A2
core (which is in-order with a deep pipeline), and using more aggressive
defaults is important.

llvm-svn: 189566

Allow targets to customize the default behavior of the generic loop unrolling
transformation. This will be used by the PowerPC backend when targeting the A2
core (which is in-order with a deep pipeline), and using more aggressive
defaults is important.

llvm-svn: 189565

This uses the TargetSubtargetInfo::useAA() function to control the defaults of
the -combiner-alias-analysis and -combiner-global-alias-analysis options.

llvm-svn: 189564

There are several optional (off-by-default) features in CodeGen that can make
use of alias analysis. These features are important for generating code for
some kinds of cores (for example the (in-order) PPC A2 core). This adds a
useAA() function to TargetSubtargetInfo to allow these features to be enabled
by default on a per-subtarget basis.

Here is the first use of this function: To control the default of the
-enable-aa-sched-mi feature.

llvm-svn: 189563

llvm-svn: 189562

llvm-svn: 189561

llvm-svn: 189560

 - At least on OS X, it is important for correct behavior of /bin/[ that argv[0]
   is passed as written, and not as the full executable path.

llvm-svn: 189559

Differential Revision: http://llvm-reviews.chandlerc.com/D1542

llvm-svn: 189558

Fixes PR17018.  Only partial test coverage because I don't want
to try to write a test which generates a file whose name contains a newline.

llvm-svn: 189557

llvm-svn: 189556

llvm-svn: 189555

llvm-svn: 189554

llvm-svn: 189553

 - Also, change TestProvider interface to operate on test indices.

llvm-svn: 189552

llvm-svn: 189551

llvm-svn: 189550

llvm-svn: 189549

do anything useful.

llvm-svn: 189548

llvm-svn: 189547

llvm-svn: 189546

llvm-svn: 189545

llvm-svn: 189544

32-bit absolute addressing in instructions likei this:

	mov $_f, %rsi

which is not supported in 64-bit mode.

rdar://8827134

llvm-svn: 189543

Passing inconsistent munaligned-access / mno-unaligned-access
flags, intentionally resulted in a warning and the flag
no-unaligned-access being used.

Gcc does, at least in practice, use the last flag in such a
case. This patch updates clang behaviour accordingly; use the
last flag or base alignment behaviour on the target (which
llvm will do if no flag is explicitly passed)

Patch by Jeroen Hofstee.

llvm-svn: 189542

llvm-svn: 189541

Summary:
We would not perform substitution at an appropriate point, allowing strange
results to appear. We would accepts things that we shouldn't or mangle things incorrectly.  Note that this hasn't fixed the other cases like
template-template parameters or non-type template parameters.

Reviewers: doug.gregor, rjmccall, rsmith

Reviewed By: rsmith

CC: cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1507

llvm-svn: 189540

Vectorizer/PassManager:  I am working on moving the vectorizer out of the SCC passes. This patch moves the SLP-vectorizer and BB-vectorizer back into SCC passes for two reasons:
1. They are a kind of cannonicalization.
2. The performance measurements show that it is better to keep them in.

There should be no functional change if you are not enabling the LateVectorization mode.

llvm-svn: 189539

llvm-svn: 189538

instance methods returning non-void. This will be quite noisy. So, it is 
placed under a new migrator flag -objcmt-migrate-readonly-property.

llvm-svn: 189537

When sysroot is not set, look for libstdc++ first on the clang install
directory. Before this change if clang was installed alongside a gcc with
the same version as the system one we would select the system libstdc++.

Unfortunately this is hard to test as only the non-sysroot case is changed.

llvm-svn: 189536

Original patch by Charles Davis.

llvm-svn: 189535

We were creating undefined atoms for common symbols by mistake. That did not
lead to a link failure, for undefined atoms would be resolved by common symbols
in the same file, but that's a waste of resource.

llvm-svn: 189534

Mode is now handled as a non-inheritable attribute, and CUDADevice & CUDAHost are now handled as inheritable attributes.  In all three cases, this makes the processing behavior more consistent with the declared behavior in Attr.td.

llvm-svn: 189532

llvm-svn: 189531

Selfhosting was crashing with the same type of problem but involving
template specializations.

llvm-svn: 189530

llvm-svn: 189529

Adding VCIncludeDir and WindowsSDKDir to the msbuild configuration file.  This allows clang to find windows.h and other files in the 
sdk and visutal studio includes.

llvm-svn: 189528

llvm-svn: 189527

llvm-svn: 189526