_mm_extract_epi16: use "& 7" when index is out of bound.

This is in line with implementation of _mm_extract_pi16.
rdar://15250497


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193187 91177308-0d34-0410-b5e6-96231b3b80d8
New fix for pr17535.

This is a fixed version of r193161. In order to handle

    void foo() __attribute__((alias("bar")));
    void bar() {}
    void zed() __attribute__((alias("foo")));

it is not enough to delay aliases to the end of the TU, we have to do two
passes over them to find if they are defined or not.

This can be implemented by producing alias as we go and just doing the second
pass at the end. This has the advantage that other parts of clang that were
expecting alias to be processed in order don't have to be changed.

This patch also handles cyclic aliases.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193188 91177308-0d34-0410-b5e6-96231b3b80d8
Treat aliases as definitions.

This fixes pr17639.

Before this patch clang would consider

void foo(void) __attribute((alias("__foo")));

a declaration. It now correctly handles it as a definition.

Initial patch by Alp Toker. I added support for variables.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193200 91177308-0d34-0410-b5e6-96231b3b80d8
Consider hidden decls for isUsed checks.

This fixes pr17624.

A FIXME from Richard Smith:

It seems to me that the root cause is that a per-Decl 'used' flag doesn't
really make much sense in the way we use it now. I think we should either track
whether that particular declaration is used (with isUsed scanning the entire
redecl chain), or we should only have one flag for the entire redeclaration
chain (perhaps by always looking at the flag on either the most recent decl or
the canonical decl). Modeling it as "is this declaration or any previous
declaration used" is weird, and requires contortions like the loop at the end
of Sema::MarkFunctionReferenced.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193202 91177308-0d34-0410-b5e6-96231b3b80d8
Sema: Allow IndirectFieldDecl to appear in a non-type template argument

We would not identify pointer-to-member construction in a non-type
template argument if it was either a FieldDecl or a CXXMethodDecl.
However, this would incorrectly reject declarations that were injected
via an IndirectFieldDecl (e.g. a field inside of an anonymous union).

This fixes PR17657.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193203 91177308-0d34-0410-b5e6-96231b3b80d8
Split -fsanitize=bounds to -fsanitize=array-bounds (for the frontend-inserted
check using the ubsan runtime) and -fsanitize=local-bounds (for the middle-end
check which inserts traps).

Remove -fsanitize=local-bounds from -fsanitize=undefined. It does not produce
useful diagnostics and has false positives (PR17635), and is not a good
compromise position between UBSan's checks and ASan's checks.

Map -fbounds-checking to -fsanitize=local-bounds to restore Clang's historical
behavior for that flag.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193205 91177308-0d34-0410-b5e6-96231b3b80d8
Retain previous language linkage of friend function declarations

With this extension, friend function declarations will retain the language
linkage specified for previous declarations instead of emitting an error
diagnostic.

The feature is known to be compatible with GCC and MSVC and permits a
language to be specified indirectly where it cannot otherwise be written
directly in class scope.

Work is ongoing to improve linkage spec diagnostics.

Fixes PR17337.

Reviewed by Richard Smith.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193206 91177308-0d34-0410-b5e6-96231b3b80d8
CFG: Properly print delegating initializer CFG elements.

...rather than segfaulting.

Patch by Enrico P!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193208 91177308-0d34-0410-b5e6-96231b3b80d8
Teach AST dumper to dump the containing module and hidden flag for declarations.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193210 91177308-0d34-0410-b5e6-96231b3b80d8
Again: Teach TreeTransform and family how to transform generic 
lambdas nested within templates and themselves.

A previous attempt http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20130930/090049.html resulted in PR 17476, and was reverted,


The original TransformLambdaExpr (pre generic-lambdas) transformed the TypeSourceInfo of the Call operator in its own instantiation scope via TransformType.  This resulted in the parameters of the call operator being mapped to their transformed counterparts in an instantiation scope that would get popped off.
Then a call to TransformFunctionParameters would add the parameters and their transformed mappings (but newly created ones!) to the current instantiation scope. This would result in a disconnect between the new call operator's TSI parameters and those used to construct the call operator declaration. This was ok in the non-generic lambda world - but would cause issues with nested transformations (when non-generic and generics were interleaved) in the generic lambda world - that I somewhat kludged around initially - but this resulted in PR17476.

The new approach seems cleaner. We only do the transformation of the TypeSourceInfo - but we make sure to do it in the current instantiation scope so we don't lose the untransformed to transformed mappings of the ParmVarDecls when they get created.   

This does not yet include capturing.

Please see test file for examples.

This patch was LGTM'd by Doug:
http://llvm-reviews.chandlerc.com/D1784


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193216 91177308-0d34-0410-b5e6-96231b3b80d8
Make UsingShadowDecls redeclarable. This fixes some visibility problems with
modules.

With this fixed, I no longer see any test regressions in the libc++ test suite
when enabling a single-module module.map for libc++ (other than issues with my
system headers).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193219 91177308-0d34-0410-b5e6-96231b3b80d8
Remove the circular reference to LambdaExpr in CXXRecordDecl.

Both Doug and Richard had asked me to remove the circular reference in CXXRecordDecl to LambdaExpr by factoring out and storing the needed information from LambdaExpr directly into CXXRecordDecl.

No change in functionality. 

In addition, I have added an IsGenericLambda flag - this makes life a little easier when we implement capturing, and are Sema-analyzing the body of a lambda (and the calloperator hasn't been wired to the closure class yet). Any inner lambdas can have potential captures that could require walking up the scope chain and checking if any generic lambdas are capture-ready. This 'bit' makes some of that checking easier. 

This patch was approved by Doug with minor modifications (comments were cleaned up, and all data members were converted from bool/enum to unsigned, as requested): 
http://llvm-reviews.chandlerc.com/D1856

Thanks!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193223 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r193223 and r193216.

They were causing CodeGenCXX/mangle-exprs.cpp to fail.

Revert "Remove the circular reference to LambdaExpr in CXXRecordDecl."

Revert "Again: Teach TreeTransform and family how to transform generic lambdas nested within templates and themselves."

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193226 91177308-0d34-0410-b5e6-96231b3b80d8
And Again: Teach TreeTransform how to transform nested generic lambdas.


A previous attempt http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20130930/090049.html resulted in PR 17476, and was reverted,

The original TransformLambdaExpr (pre generic-lambdas) transformed the TypeSourceInfo of the Call operator in its own instantiation scope via TransformType.  This resulted in the parameters of the call operator being mapped to their transformed counterparts in an instantiation scope that would get popped off.
Then a call to TransformFunctionParameters would add the parameters and their transformed mappings (but newly created ones!) to the current instantiation scope. This would result in a disconnect between the new call operator's TSI parameters and those used to construct the call operator declaration. This was ok in the non-generic lambda world - but would cause issues with nested transformations (when non-generic and generics were interleaved) in the generic lambda world - that I somewhat kludged around initially - but this resulted in PR17476.

The new approach seems cleaner. We only do the transformation of the TypeSourceInfo - but we make sure to do it in the current instantiation scope so we don't lose the untransformed to transformed mappings of the ParmVarDecls when they get created.   

Another attempt caused a test to fail (http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20131021/091533.html) and also had to be reverted - my apologies - in my haste, i did not run all the tests - argh!

Now all the tests seem to pass - but a Fixme has been added - since I suspect Richard will find the fix a little inelegant ;) I shall try and work on a more elegant fix once I have had a chance to discuss with Richard or Doug at a later date.

Hopefully the third time;s a charm *fingers crossed*

This does not yet include capturing.

Please see test file for examples.

This patch was LGTM'd by Doug:
http://llvm-reviews.chandlerc.com/D1784



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193230 91177308-0d34-0410-b5e6-96231b3b80d8
[mips][msa] Add intrinsics that map to pseudo-instructions.

Unlike the previously added intrinsics, these do not map to a single instruction
on MIPS32. They are provided for regularity (to round out the .[bhw] variants
of the same operation) and compatibility with GCC.

Includes:
  copy_[us].d, fill.d, insert.d, insve.d



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193237 91177308-0d34-0410-b5e6-96231b3b80d8