This is important for the correct lowering of unwind instructions
(which doesn't matter at all) and llvm.eh.resume calls (which does).

llvm-svn: 132291

llvm-svn: 132290

its definition, that the first enumeration doesn't always get used as the
default.

llvm-svn: 132289

variable. Noticed by inspection.

Simulate memset in EvaluateFunction where the target of the memset and the
value we're setting are both the null value. Fixes PR10047!

llvm-svn: 132288

llvm-svn: 132287

llvm-svn: 132286

llvm-svn: 132285

I tried to use an assert to prove that I could remove each of the
arguments I did, but ended up writing my assert with inverted logic.
Doh! Reported by Xi Wang on cfe-dev. I have manually verified the source
locations and ranges for these using -ast-dump. I tried writing a test
case that would catch these, but these expressions aren't exposed in the
c-index-test's token annotation utility.

llvm-svn: 132284

handler.

At this moment, only GCC-style exceptions are supported. Other kinds
of exceptions, including "traditional" SEH and Microsoft Visual C++ exceptions,
need more work--and an compiler exception model that isn't specific to
GCC-style exceptions!

In particular, I imagine that it would be possible to mix "traditional" SEH
with GCC-style EH or Microsoft C++ EH. Currently LLVM has no way (beyond some
target-specific defaults and whole-module compiler switches) of knowing which
scheme to use when.

llvm-svn: 132283

llvm-svn: 132281

(or anything running in a terminal) wants. Not what a UI (Xcode) would want 
where it creates a debugger per debug window. The current code had an infinite
loop after a debug session ended. 

llvm-svn: 132280

llvm-svn: 132279

llvm-svn: 132278

llvm-svn: 132277

llvm-svn: 132276

fixes self-host.

llvm-svn: 132275

and should probably be encoded as

DW_OP_reg 32 DW_OP_piece 4 DW_OP_reg 33

llvm-svn: 132274

llvm-svn: 132271

llvm-svn: 132270

It's quite likely that this will explode, but I need to know how. :)

llvm-svn: 132269

-verify-machineinstrs failures on several tests.

llvm-svn: 132268

llvm-svn: 132267

llvm-svn: 132266

llvm-svn: 132265

llvm-svn: 132264

Refactor the type legalizer. Switch TargetLowering to a new enum - LegalizeTypeAction.
This patch does not change the behavior of the type legalizer. The codegen
produces the same code.
This infrastructural change is needed in order to enable complex decisions
for vector types (needed by the vector-select patch).

llvm-svn: 132263

llvm-svn: 132262

noexcept for <memory>.  I've added a few extension noexcept to:  allocator_traits<A>::deallocate, allocaate<T>::deallocate, return_temporary_buffer, and default_delete<T>::operator()(T*) const.  My rationale was:  If a std-dicated noexcept function needs to call another std-defined function, that called function must be noexcept.  We're all a little new to noexcept, so things like this are to be expected.  Also included fix for broken __is_swappable trait pointed out by Marc Glisse, thanks Marc|.  And fixed a test case for is_nothrow_destructible.  Destructors are now noexcept by default|

llvm-svn: 132261

llvm-svn: 132260

llvm-svn: 132259

llvm-svn: 132258

llvm-svn: 132257

llvm-svn: 132256

llvm-svn: 132255

Fixes PR10040.

llvm-svn: 132254

transformed by the inliner into a branch to the enclosing landing pad
(when inlined through an invoke).  If not so optimized, it is lowered
DWARF EH preparation into a call to _Unwind_Resume (or _Unwind_SjLj_Resume
as appropriate).  Its chief advantage is that it takes both the
exception value and the selector value as arguments, meaning that there
is zero effort in recovering these;  however, the frontend is required
to pass these down, which is not actually particularly difficult.

Also document the behavior of landing pads a bit better, and make it
clearer that it's okay that personality functions don't always land at
landing pads.  This is just a fact of life.  Don't write optimizations that
rely on pushing things over an unwind edge.

llvm-svn: 132253

switch.  With this newfound organization, teach tblgen how not to give
all intrinsics the 'nounwind' attribute.  Introduce a new intrinsic,
llvm.eh.resume, which does not have this attribute.  Documentation and uses
to follow.

llvm-svn: 132252

llvm-svn: 132250

llvm-svn: 132249

to load/store i64 values. Since there's no current support to explicitly
declare such restrictions, implement it by using specific hardcoded register
pairs during isel.

llvm-svn: 132248