clang-cl: make /Gy imply -fdata-sections in addition to -ffunction-sections

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204736 91177308-0d34-0410-b5e6-96231b3b80d8
Fix an logic error in the clang driver preventing crtfastmath.o from linking when -Ofast is used without -ffast-math

In gcc using -Ofast forces linking of crtfastmath.o.
In the current clang crtfastmath.o is only linked when -ffast-math/-funsafe-math-optimizations passed. It can lead to performance issues, when using only -Ofast without explicit -ffast-math (I faced with it).
My patch fixes inconsistency with gcc behaviour and also introduces few tests on it.

Patch by Zinovy Nis!

Differential Revision: http://llvm-reviews.chandlerc.com/D3114

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204742 91177308-0d34-0410-b5e6-96231b3b80d8
MS ABI: Mark direct virtual bases as visted when building vtable paths

Fixes PR19240.  In retrospect, this is a fairly obvious bug.  :)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204744 91177308-0d34-0410-b5e6-96231b3b80d8
-fms-compatibility: Only form implicit member exprs for unqualified ids

If there are any scope specifiers, then a base class must be named or
the symbol isn't from a base class.

Fixes PR19233.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204753 91177308-0d34-0410-b5e6-96231b3b80d8
Use an option alias to implement -gmlt

Review feedback from Reid Kleckner on r203603.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204755 91177308-0d34-0410-b5e6-96231b3b80d8
PR19249: Don't forget to DiagnoseUseOfDecl for the implicit use of a variable
in a lambda capture.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204757 91177308-0d34-0410-b5e6-96231b3b80d8
[PGO] Add simplified branch weights for Objective-C for-collection loops.

Conceptually one of these loops is just a while-loop, but the actual code-gen
is more complicated. We don't instrument all the different control flow edges
to get accurate counts for each conditional branch, nor do I think it makes
sense to do so. Instead, make the simplifying assumption that the loop behaves
like a while-loop. Use the same branch weights for the first check for an
empty collection as would be used for the back-edge of a while loop, and use
that same weighting for the innermost loop, ignoring the possibility that there
may be some extra code to go fetch more elements.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204767 91177308-0d34-0410-b5e6-96231b3b80d8
Move the -i[no-]system-prefix options from CC1Options.td to Options.td.

Summary:
This allows them to be used without -cc1 the same way as -I and -isystem.
Renamed the options to --system-header-prefix=/--no-system-header-prefix to avoid interference with -isystem and make the intent of the option cleaner.

Reviewers: rsmith

Reviewed By: rsmith

CC: cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D3185

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204775 91177308-0d34-0410-b5e6-96231b3b80d8
Add existing warnings to -Waddress so that it works closer to what GCC has.
Previously, -Waddress was empty.

Fixes PR9043.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204776 91177308-0d34-0410-b5e6-96231b3b80d8
Update for llvm api change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204783 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "Update for llvm api change."

This reverts commit r204783.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204785 91177308-0d34-0410-b5e6-96231b3b80d8
Fix PR19066 - 0-sized vftable in the presence of virtual inheritance

Reviewed at http://llvm-reviews.chandlerc.com/D3181

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204786 91177308-0d34-0410-b5e6-96231b3b80d8
Make the 'for (auto ...)' names more readable

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204787 91177308-0d34-0410-b5e6-96231b3b80d8
From Matt Thomas: use long long for [u]int64_t and [u]intmax_t on
NetBSD/aarch64 to simplify code sharing with NetBSD/arm.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204798 91177308-0d34-0410-b5e6-96231b3b80d8
ARM: be more flexible about how --mhwdiv is accepted.

Patch by Gabor Ballabas.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204807 91177308-0d34-0410-b5e6-96231b3b80d8
Add support for __builtin___clear_cache in Clang

Adding the mapping between __builtin___clear_cache into @llvm.clear_cache

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204820 91177308-0d34-0410-b5e6-96231b3b80d8
-fms-extensions: Add __va_start builtin, which is used for x64

The main difference between __va_start and __builtin_va_start is that
the address of the va_list has already been taken, and the va_list is
always a char*.

__va_end and __va_arg are not needed.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204821 91177308-0d34-0410-b5e6-96231b3b80d8
-Wglobal-constructors: Don't warn on trivial defaulted dtors

Fixes PR19253.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204825 91177308-0d34-0410-b5e6-96231b3b80d8
Intrin.h: Implement _InterlockedExchangePointer

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204827 91177308-0d34-0410-b5e6-96231b3b80d8
Recommit r204493 with a fix to look in both clang and llvm directories.
Hopefully addresses r204539.

Make clang/test/lit.cfg pre-scan the RUN line looking for tool names,
and substitute fully qualified path names pointing to the build
directory.  This ensures we're testing the just-built tools.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204831 91177308-0d34-0410-b5e6-96231b3b80d8