Add tests for a corner case of when to relax all instructions:

We don't want to relax all instructions in

$ clang -c test.s

since most users don't pass -O when using the driver to assemble.

On the other hand, -save-temps should not change the output unnecessary, so in

$ clang -c test.c -save-temps

we should relax all instructions.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169815 91177308-0d34-0410-b5e6-96231b3b80d8
BackendUtil.cpp: Add #include "llvm/TargetTransformInfo.h"

llvm/Target/TargetMachine.h will not provide "llvm/TargetTransformInfo.h" any more.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169816 91177308-0d34-0410-b5e6-96231b3b80d8
clang/test/Driver: Introduce the feature "clang-driver", set if gcc driver is not used.

It is not set at targetting cygming. See PR12920.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169824 91177308-0d34-0410-b5e6-96231b3b80d8
clang/test/Driver/debug-options-as.c: Fixup not to use prefix=S. I didn't know "REQUIRES:" would match --check-prefix=S ...

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169826 91177308-0d34-0410-b5e6-96231b3b80d8
clang/test/Driver/linker-opts.c: Fix XFAIL that I removed win32.

Sorry for my 3rd commit :(

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169827 91177308-0d34-0410-b5e6-96231b3b80d8
[PCH] When writing out the list of input files, avoid emitting duplicate
entries of the same file.

This can happen because the file was "included" multiple times and is
referenced by multiple SLocEntries.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169829 91177308-0d34-0410-b5e6-96231b3b80d8
[PCH] Remove redundant stat call when validating the input files.

This became redundant after we removed the stat cache.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169830 91177308-0d34-0410-b5e6-96231b3b80d8
Extend stat query APIs to explicitly specify if the query is for
a file or directory, allowing just a stat call if a file descriptor
is not needed.

Doing just 'stat' is faster than 'open/fstat/close'.
This has the effect of cutting down system time for validating the input files of a PCH.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169831 91177308-0d34-0410-b5e6-96231b3b80d8
Rename StmtDumper::DumpSubTree() to dumpStmt()

Summary:
Also rename DumpDeclarator() to dumpDecl(). Once Decl dumping is added, these will be the two main methods of the class, so this is just for consistency in naming.

There was a DumpStmt() method already, but there was no point in having it, so I have merged it into VisitStmt(). Similarly, DumpExpr() is merged into VisitExpr().

Reviewers: alexfh

Reviewed By: alexfh

CC: cfe-commits, alexfh

Differential Revision: http://llvm-reviews.chandlerc.com/D156

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169865 91177308-0d34-0410-b5e6-96231b3b80d8
StmtDumper coding style changes

Summary:
A few small coding style changes for StmtDumper, including:
- rename Dump* methods to dump*
- uninline some methods
- comment fixes
- whitespace fixes

Please review and commit if okay.

Reviewers: alexfh

Reviewed By: alexfh

CC: cfe-commits, alexfh, klimek

Differential Revision: http://llvm-reviews.chandlerc.com/D190

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169866 91177308-0d34-0410-b5e6-96231b3b80d8
[driver] Add the -fvectorize flag to enable the loop vectorization passes.
rdar://12839978 

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169885 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a copypasto bug. Also rename the parameter in question to not shadow the
'file' builtin, and fix up a docstring a little.

Hat tip to Sebastian Kreft Carreno at Google for noticing the bug.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169887 91177308-0d34-0410-b5e6-96231b3b80d8
[driver] Add the -ftree-vectorize flag as a alias of -fvectorize to maintain
compatibility with gcc.
rdar://12839978 

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169888 91177308-0d34-0410-b5e6-96231b3b80d8
Speed up looking up static diagnostic infos.

Instead of doing a binary search over the whole diagnostic table (which weighs
a whopping 48k on x86_64), use the existing enums to compute the index in the
table. This avoids loading any unneeded data from the table and avoids littering
CPU caches with it. This code is in a hot path for code with many diagnostics.

1% speedup on -fsyntax-only gcc.c, which emits a lot of warnings.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169890 91177308-0d34-0410-b5e6-96231b3b80d8
Don't complain about incomplete implementations for methods that are
unavailable due to availability attributes. <rdar://problem/12798237>


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169903 91177308-0d34-0410-b5e6-96231b3b80d8
objective-C blocks: Check for record type when deciding if 
byref variable requires extended layout info. to prevent 
a crash involving arrays declared __block. // rdar://12787751


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169908 91177308-0d34-0410-b5e6-96231b3b80d8
Add -fslp-vectorize to enable bb-vectorize

Add -fslp-vectorize (with -ftree-slp-vectorize as an alias for gcc compatibility)
to provide a way to enable the basic-block vectorization pass. This uses the same
acronym as gcc, superword-level parallelism (SLP), also common in the literature,
to refer to basic-block vectorization.

Nadav suggested this as a follow-up to the adding of -fvectorize.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169909 91177308-0d34-0410-b5e6-96231b3b80d8
Add SPIR32/SPIR64 targets to Clang

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169917 91177308-0d34-0410-b5e6-96231b3b80d8
Use @import rather than @__experimental_modules_import, since the
latter is rather a mess to type.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169919 91177308-0d34-0410-b5e6-96231b3b80d8
Don't use 'touch' in this test; it may be the cause of Windows-related failures.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169922 91177308-0d34-0410-b5e6-96231b3b80d8