MC: Extend MCAsmLayout to explicitly track which fragments have been layed out, and enforce several invariants to LayoutFragment to ensure we only do layout in a sensible order.

llvm-svn: 103753

llvm-svn: 103752

llvm-svn: 103751

Also, elimminate MCAsmLayout::set*, which are no longer needed.

llvm-svn: 103750

llvm-svn: 103749

llvm-svn: 103748

This loop is quadratic in the capacity for a DenseMap:

  while(!map.empty())
    map.erase(map.begin());

Instead we now do a normal begin() - end() iteration followed by map.clear().
That also has the nice sideeffect of shrinking the map capacity on demand.

llvm-svn: 103747

Adding a v8i64 512-bit vector type. This will be used to model ARM NEON intrinsics which translate into a pair of vld / vst instructions that can load / store 8 consecutive 64-bit (D) registers.

llvm-svn: 103746

This fixes bunch of failures in gdb testsuite.

llvm-svn: 103745

one was subject to double rounding in extreme cases.

llvm-svn: 103744

Eliminate use of magic numbers to access OpActions. It also has the effect of allowing more than 31 scalar value types. MAX_ALLOWED_VALUETYPE had already been updated to 64 a while back.

llvm-svn: 103743

Fix up LoadExtActions, TruncStoreActions, and IndexedModeActions representation and setter and getter's so they will continue to work if the number of scalar ValueType's exceeds 31.

llvm-svn: 103742

methods for which the key function is guaranteed to be in another
translation unit. Unfortunately, this guarantee isn't the case when
dealing with shared libraries that fail to export these virtual method
definitions. 

I'm reopening PR6747 so we can consider this again at a later point in
time.

llvm-svn: 103741

llvm-svn: 103739

llvm-svn: 103738

when they move instructions.

llvm-svn: 103737

llvm-svn: 103733

llvm-svn: 103732

llvm-svn: 103731

Do not use those for Thumb1 functions.

llvm-svn: 103730

Patch by Dimitry Andric!

llvm-svn: 103727

use of it in MachineCSE.

llvm-svn: 103726

basic block.

llvm-svn: 103725

llvm-svn: 103724

llvm-svn: 103723

llvm-svn: 103722

The revision history for this function is interesting, with multiple layers of
wrongness being introduced one at a time.

This fixes a weird issue where bugpoint -run-llc would suddenly exit 13 half way
through isolating a miscompilation.

llvm-svn: 103721

llvm-svn: 103720

Completes radar 7963410.

llvm-svn: 103719

"used" (e.g., we will refer to the vtable in the generated code) and
when they are defined (i.e., because we've seen the key function
definition). Previously, we were effectively tracking "potential
definitions" rather than uses, so we were a bit too eager about emitting
vtables for classes without key functions. 

The new scheme:
  - For every use of a vtable, Sema calls MarkVTableUsed() to indicate
  the use. For example, this occurs when calling a virtual member
  function of the class, defining a constructor of that class type,
  dynamic_cast'ing from that type to a derived class, casting
  to/through a virtual base class, etc.
  - For every definition of a vtable, Sema calls MarkVTableUsed() to
  indicate the definition. This happens at the end of the translation
  unit for classes whose key function has been defined (so we can
  delay computation of the key function; see PR6564), and will also
  occur with explicit template instantiation definitions.
 - For every vtable defined/used, we mark all of the virtual member
 functions of that vtable as defined/used, unless we know that the key
 function is in another translation unit. This instantiates virtual
 member functions when needed.
  - At the end of the translation unit, Sema tells CodeGen (via the
  ASTConsumer) which vtables must be defined (CodeGen will define
  them) and which may be used (for which CodeGen will define the
  vtables lazily). 

From a language perspective, both the old and the new schemes are
permissible: we're allowed to instantiate virtual member functions
whenever we want per the standard. However, all other C++ compilers
were more lazy than we were, and our eagerness was both a performance
issue (we instantiated too much) and a portability problem (we broke
Boost test cases, which now pass).

Notes:
  (1) There's a ton of churn in the tests, because the order in which
  vtables get emitted to IR has changed. I've tried to isolate some of
  the larger tests from these issues.
  (2) Some diagnostics related to
  implicitly-instantiated/implicitly-defined virtual member functions
  have moved to the point of first use/definition. It's better this
  way.
  (3) I could use a review of the places where we MarkVTableUsed, to
  see if I missed any place where the language effectively requires a
  vtable.

Fixes PR7114 and PR6564.

llvm-svn: 103718

Fixes <rdar://problem/7979430>.

llvm-svn: 103717

llvm-svn: 103716

llvm-svn: 103715

llvm-svn: 103714

llvm-svn: 103713

references. This is a WIP as we should handle function pointers, etc. Reshuffle
the code to do this to facilitate recursing in this manner, and to check for
the type already being printed first rather than last.

llvm-svn: 103712

MC: Move ordinal calculation, to make sure fragments synthesized for layout get assigned ordinals properly.

llvm-svn: 103711

llvm-svn: 103710

llvm-svn: 103709

magic type that 'id' is a pointer to.

llvm-svn: 103708