Patch by John Spencer

llvm-svn: 152574

--- Reverse-merging r152486 into '.':
U    lib/CodeGen/SjLjEHPrepare.cpp

llvm-svn: 152571

llvm-svn: 152567

candidate set for subsequent inlining, try to simplify the arguments to
the inner call site now that inlining has been performed.

The goal here is to propagate and fold constants through deeply nested
call chains. Without doing this, we loose the inliner bonus that should
be applied because the arguments don't match the exact pattern the cost
estimator uses.

Reviewed on IRC by Benjamin Kramer.

llvm-svn: 152556

Typically instcombine has handled this, but pointer differences show up
in several contexts where we would like to get constant folding, and
cannot afford to run instcombine. Specifically, I'm working on improving
the constant folding of arguments used in inline cost analysis with
instsimplify.

Doing this in instsimplify implies some algorithm changes. We have to
handle multiple layers of all-constant GEPs because instsimplify cannot
fold them into a single GEP the way instcombine can. Also, we're only
interested in all-constant GEPs. The result is that this doesn't really
replace the instcombine logic, it's just complimentary and focused on
constant folding.

Reviewed on IRC by Benjamin Kramer.

llvm-svn: 152555

llvm-svn: 152554

llvm-svn: 152553

<rdar://problem/11024696>

llvm-svn: 152548

llvm-svn: 152545

llvm-svn: 152544

DwarfDebug: Store the filename/dirname pair as a zero-separated string in a stringmap, instead of using a highly inefficient std::map of a pair of std::strings.

llvm-svn: 152541

llvm-svn: 152538

llvm-svn: 152537

llvm-svn: 152535

Renamed methods caseBegin, caseEnd and caseDefault with case_begin, case_end, and case_default.
Added some notes relative to case iterators.

llvm-svn: 152532

It doesn't currently support the op info and symbol lookup callbacks,
but it is better than nothing.

llvm-svn: 152527

llvm-svn: 152525

Shrink and reorder some fields in MCOperandInfo to fit it in 8 bytes to reduce size of static tables.

llvm-svn: 152524

llvm-svn: 152523

llvm-svn: 152522

llvm-svn: 152518

it would fail with {,u}int64_t on x86-64 Linux.

This also removes code duplication.

llvm-svn: 152517

llvm-svn: 152515

Chris Lattner says the edis interface is going away. It doesn't make
sense to land something that will go away in the near future.

llvm-svn: 152508

llvm-svn: 152507

This requires a C++ change to EDDisassembler's ctor to function properly
(the llvm::InitializeAll* functions aren't being called currently and
there is no way to call them from Python).

Code is partially tested and works well enough for initial commit. There
are probably many small bugs.

llvm-svn: 152506

llvm-svn: 152505

llvm-svn: 152502

llvm-svn: 152499

llvm-svn: 152498

The 'CmpInst::isFalseWhenEqual' function returns 'false' for values other than
simply equality. For instance, it returns 'false' for <= or >=. This isn't the
correct behavior for this transformation, which is checking for strict equality
and non-equality. It was causing the gcc.c-torture/execute/frame-address.c test
to fail because it would completely (and incorrectly) optimize a whole function
into a 'ret i32 0'.

llvm-svn: 152497

llvm-svn: 152495

llvm-svn: 152492

a common collection of methods on Value, and share their implementation.
We had two variations in two different places already, and I need the
third variation for inline cost estimation.

Reviewed by Duncan Sands on IRC, but further comments here welcome.

llvm-svn: 152490

Patch by Kay Tiong Khoo!

llvm-svn: 152487

The old way of determine when and where to spill a value that was used inside of
a landing pad resulted in spilling that value everywhere and not just at the
invoke edge.

This algorithm determines which values are used within a landing pad. It then
spills those values before the invoke and reloads them before the uses. This
should prevent excessive spilling in many cases, e.g. inside of loops.
<rdar://problem/10609139>

llvm-svn: 152486

llvm-svn: 152483

It is now possible to load object files and scan over sections, symbols,
and relocations! Includes test code with partial coverage.

llvm-svn: 152482

llvm-svn: 152474

llvm-svn: 152460