[objc-arc] When we initialize ARCRuntimeEntryPoints, make sure we reset all references to entrypoint declarations as well.

llvm-svn: 185764

llvm-svn: 185763

// rdar://14182680.

llvm-svn: 185762

Obviously the personality function should be emitted as language handler
instead of the hard coded _GCC_specific_handler. The language specific
data must be placed after the unwind information therefore it must not
be emitted into a separate section.

Reviewed by Charles Davis and Nico Rieck.

llvm-svn: 185761

For alignment purposes, the instruction array will always have an even
number of entries, with the final entry potentially unused (in which
case the array will be one longer than indicated by the count of unwind
codes field).

Reviewed by Charles Davis and Nico Rieck.

llvm-svn: 185760

 data structures.

The Win64 EH data structures must be of type IMAGE_REL_AMD64_ADDR32NB
instead of IMAGE_REL_AMD64_ADDR32. This is easiely achieved by adding
the VK_COFF_IMGREL32 modifier to the symbol reference.
Change also references to start and end of the SEH range of a function
as offsets to start of the function.

Reviewed by Charles Davis and Nico Rieck.

llvm-svn: 185759

The code offset for unwind code SET_FPREG is wrong because it is set
to constant 0. The fix is to do the same as for the other unwind
codes: emit a label and later the absolute difference between the
label and the begin of the prologue.
Also enables the failing test case MC/COFF/seh.s

Reviewed by Charles Davis and Nico Rieck.

llvm-svn: 185758

llvm-svn: 185757

llvm-svn: 185756

ReduceLoadWidth unconditionally drops extensions from loads. Limit it to the
case when all of the bits the extension would otherwise produce are dropped by
the shrink. It would be possible to shrink the load in more cases by merging
the extensions, but this isn't trivial and a very rare case. I left a TODO for
that case.

Fixes PR16551.

llvm-svn: 185755

This prevents the emission of DAG-generated vreg definitions after a
tail call be dropping them entirely (on the grounds that nothing could
use them anyway, and they interfere with O0 CodeGen).

llvm-svn: 185754

llvm-svn: 185753

llvm-svn: 185752

llvm-svn: 185751

llvm-svn: 185748

[objc-arc] Performed some small cleanups in ARCRuntimeEntryPoints and added an llvm_unreachable after the switch to quiet -Wreturn_type errors.

llvm-svn: 185746

This boils down to us sending invalid function decls to
CheckFunctionDeclaration becauswe we did not consider that CheckMain
could cause the decl to be invalid.  Instead, interogate the new decl's
main-validity and *then* send it over to get CheckFunctionDeclaration'd
if it was still valid after calling CheckMain.

llvm-svn: 185745

This fixes an issue that came up due to -fpermissive on the bots.

llvm-svn: 185744

llvm-svn: 185743

llvm-svn: 185742

llvm-svn: 185741

This is the first patch in a series of 3 patches which clean up how we create
runtime function declarations in the ARC optimizer when they do not exist
already in the IR.

Currently we have a bunch of duplicated code in ObjCARCOpts, ObjCARCContract
that does this. This patch refactors that code into a separate class called
ARCRuntimeEntryPoints which lazily creates the declarations for said
entrypoints.

The next two patches will consist of the work of refactoring
ObjCARCContract/ObjCARCOpts to use this new code.

llvm-svn: 185740

llvm-svn: 185739

llvm-svn: 185738

llvm-svn: 185737

llvm-svn: 185736

functions. Make the function attributes pass add it to known library functions
and when it can deduce it.

llvm-svn: 185735

class type. // rdar://14261999

llvm-svn: 185734

No functional change intended.

llvm-svn: 185733

use can cause crash. No test is available. It is uncovered
by code browsing.  // rdar://14348205

llvm-svn: 185732

llvm-svn: 185731

llvm-svn: 185730

llvm-svn: 185729

llvm-svn: 185728

Include a test that clang now produces output files with permissions matching
the umask.

llvm-svn: 185727

This function is complementary to createTemporaryFile. It handles the case were
the unique file is *not* temporary: we will rename it in the end. Since we
will rename it, the file has to be in the same filesystem as the final
destination and we don't prepend the system temporary directory.

This has a small semantic difference from unique_file: the default mode is 0666.
This matches the behavior of most unix tools. For example, with this change
lld now produces files with the same permissions as ld. I will add a test
of this change when I port clang over to createUniqueFile (next commit).

llvm-svn: 185726

llvm-svn: 185725

use of objc's properties.

llvm-svn: 185724

llvm-svn: 185723

[libclang] Introduce clang_Cursor_isObjCOptional, which returns whether the declaration was affected by "@optional"

rdar://14348525.

llvm-svn: 185722