Allow cheap instructions to be hoisted if they are register pressure
neutral or better. This happens if the instruction is the last loop use
of another virtual register.

Only expensive instructions are allowed to increase loop register
pressure.

llvm-svn: 154455

Hoisting a value that is used by a PHI in the loop will introduce a
copy because the live range is extended to cross the PHI.

The same applies to PHIs in exit blocks.

Also use this opportunity to make HasLoopPHIUse() non-recursive.

llvm-svn: 154454

llvm-svn: 154453

llvm-svn: 154452

(Applied changes to CStringAPI, Malloc, and Taint.)

This might almost never happen, but we should not crash even if it does.
This fixes a crash on the internal analyzer buildbot, where postgresql's
configure was redefining memmove (radar://11219852).

llvm-svn: 154451

llvm-svn: 154450

of an uninitialized Stmt* in serialization of __atomic_init and add a test of
atomics serialization.

llvm-svn: 154448

Move the constant-folding support for FP_ROUND in SelectionDAG from the one-operand version of getNode() to the two-operand version, since it became a two-operand node at sound point.
Zap a testcase that this allows us to completely fold away.

llvm-svn: 154447

ConstantFP::get(Type*, double) is unreliably host-specific:
it can't handle a type like PPC128 on an x86 host. It even
has a comment to that effect: "This should only be used for
simple constant values like 2.0/1.0 etc, that are
known-valid both as host double and as the target format."

Instead, use APFloat. While we're at it, randomize the floating
point value more thoroughly; it was previously limited
to the range 0 to 2**19 - 1.

PR12451.

llvm-svn: 154446

LangRef.html says:
"There are no arrays, vectors or constants of this type."

This was hitting assertions when passing the -generate-x86-mmx
option.

PR12452.

llvm-svn: 154445

- don't isntrument reads from constant globals.
Saves ~1.5% of instrumented instructions on CPU2006
(counting static instructions, not their execution).
- don't insrument reads from vtable (which is a global constant too).
Saves ~5%.

I did not measure the run-time impact of this,
but it is certainly non-negative.

llvm-svn: 154444

introduced by the test harness' expansion of %t.

llvm-svn: 154443

subscripting. // rdar://11203853

llvm-svn: 154441

cover all possible condition codes.

llvm-svn: 154440

llvm-svn: 154439

Generate a sink when the dynamic_cast from a reference fails to
represent a thrown exception.

llvm-svn: 154438

for methods in categories of super classes. rdar://11220358

llvm-svn: 154436

Added more documentation in the header file to explain how to use the results that are found by the function calls to find_pointer_in_heap().

llvm-svn: 154435

Simulate the C++ dynamic_cast in the analyzer.

llvm-svn: 154434

llvm-svn: 154433

incomplete type, keep track of the actual type that was
incomplete. Otherwise, we might fail to produce a diagnostic. Fixes
PR12498.

llvm-svn: 154432

multiplication by a denormal, and some tests checking that.

llvm-svn: 154431

information and more closely match GCC's, from Nikola Smiljanic!

llvm-svn: 154430

StringMap. This was redundant and unnecessarily bloated the MDString class.

Because the MDString class is a "Value" and will never have a "name", and
because the Name field in the Value class is a pointer to a StringMap entry, we
repurpose the Name field for an MDString. It stores the StringMap entry in the
Name field, and uses the normal methods to get the string (name) back.

PR12474

llvm-svn: 154429

return types, from Michel Morin!

llvm-svn: 154428

llvm-svn: 154427

llvm-svn: 154426

llvm-svn: 154425

non-type template parameter of pointer type is not a constant expression.

llvm-svn: 154424

PR9796

llvm-svn: 154422

providing code completions for Objective-C method declarations. Fixes
<rdar://problem/11164498>.

llvm-svn: 154421

and emit a relatively empty block for a plain break statement. This
enables us to track where we went through a switch.

PR9796 & rdar://11215207

llvm-svn: 154420

llvm-svn: 154419

a write to the same temp follows in the same BB.
Also add stats printing.

On Spec CPU2006 this optimization saves roughly 4% of instrumented reads
(which is 3% of all instrumented accesses):
Writes            : 161216
Reads             : 446458
Reads-before-write: 18295

llvm-svn: 154418

don't elide the branch instruction if it's the only one in the block,
otherwise it's ok.

PR9796 and rdar://11215207

llvm-svn: 154417

not consume slots in the persistent variable
store.

llvm-svn: 154416

Suggested by: Sebastian Pop  <sebpop@gmail.com>

llvm-svn: 154415

llvm-svn: 154414

'public', 'private', or 'protected', unless code completion patterns
are enabled. Fixes <rdar://problem/11189132>.

llvm-svn: 154413

We were incorrectly conflating some add variants which don't have a
cc_out operand with the mirroring sub encodings, which do. Part of the
awesome non-orthogonality legacy of thumb1. Similarly, handling of
add/sub of an immediate was sometimes incorrectly removing the cc_out
operand for add/sub register variants.

rdar://11216577

llvm-svn: 154411