and implemented it for the EmulateInstructionARM class.

llvm-svn: 124563

of the EmulateInstruction class.

llvm-svn: 124562

by PR9088 fixes things.

llvm-svn: 124561

to do this and more, but would only do it if X/Y had only one use.  Spotted as the
most common missed simplification in SPEC by my auto-simplifier, now that it knows
about nuw/nsw/exact flags.  This removes a bunch of multiplications from 447.dealII
and 483.xalancbmk.  It also removes a lot from tramp3d-v4, which results in much
more inlining.

llvm-svn: 124560

Teach DAGCombine to fold fold (sra (trunc (sr x, c1)), c2) -> (trunc (sra x, c1+c2) when c1 equals the amount of bits that are truncated off.

This happens all the time when a smul is promoted to a larger type.

On x86-64 we now compile "int test(int x) { return x/10; }" into
  movslq  %edi, %rax
  imulq $1717986919, %rax, %rax
  movq  %rax, %rcx
  shrq  $63, %rcx
  sarq  $34, %rax <- used to be "shrq $32, %rax; sarl $2, %eax"
  addl  %ecx, %eax

This fires 96 times in gcc.c on x86-64.

llvm-svn: 124559

invocation. 

This mimics what gcc does and fixes libtool check for libraries.

llvm-svn: 124558

llvm-svn: 124557

llvm-svn: 124556

llvm-svn: 124555

llvm-svn: 124554

When emitting RTTI for a non-class type, compute the visibility of the RTTI data based on the explicit visibility of the type.

llvm-svn: 124553

llvm-svn: 124552

llvm-svn: 124551

llvm-svn: 124550

I'm still not sure if having the typenames be visible with -hidden-weak-vtables, but I think it makes sense.

llvm-svn: 124549

Set the visibility for typeinfo names.

llvm-svn: 124548

This is the one where one of the branches of the select is another select on
the same condition.

llvm-svn: 124547

Change CodeGenModule::setTypeVisibility to take a TypeVisibilityKind enum instead of an "IsForRTTI" flag.

llvm-svn: 124546

The DEBUG() call at line 606 demands to see raw_ostream's definition. I have no idea why this seems to only break MSVC.

llvm-svn: 124545

llvm-svn: 124544

llvm-svn: 124543

llvm-svn: 124542

llvm-svn: 124541

llvm-svn: 124540

Make emitting a VTT a two-step process, much like emitting a VTable. You first get the address of the VTT, and then pass it to EmitVTTDefinition.

llvm-svn: 124539

llvm-svn: 124538

Add a new function, to be used by CGRTTI, CGVTables and CGVTT (which each has their own copy of this code).

llvm-svn: 124537

llvm-svn: 124536

llvm-svn: 124535

llvm-svn: 124534

llvm-svn: 124533

This happens e.g. for code like "X - X%10" where we lower the modulo operation
to a series of multiplies and shifts that are then subtracted from X, leading to
this missed optimization.

llvm-svn: 124532

llvm-svn: 124531

by name or by pid (with or without waiting for a process to launch) and
catch the response asynchronously.

llvm-svn: 124530

llvm-svn: 124529

When trying to get the most derived class, don't assume that we can ignore all casts. We can only ignore derived-to-base and no-op casts. Fixes selfhost.

llvm-svn: 124528

llvm-svn: 124527

llvm-svn: 124526

llvm-svn: 124525

When calling a virtual member function on a base class and the most derived class is marked 'final', we can devirtualize the call.

llvm-svn: 124524