and introduce a new Instruction::isIdenticalTo which tests for full
identity, including the SubclassOptionalData flags. Also, fix the
Instruction::clone implementations to preserve the SubclassOptionalData
flags. Finally, teach several optimizations how to handle
SubclassOptionalData correctly, given these changes.

This fixes the counterintuitive behavior of isIdenticalTo not comparing
the full value, and clone not returning an identical clone, as well as
some subtle bugs that could be caused by these.

Thanks to Nick Lewycky for reporting this, and for an initial patch!

llvm-svn: 80038

sinking code, since they are special. If the loop preheader happens
to be the entry block of a function, don't sink static allocas
out of it. This fixes PR4775.

llvm-svn: 80010

llvm-svn: 80009

llvm-svn: 80007

llvm-svn: 80006

Update DebugInfo interface to use metadata, instead of special named llvm.dbg.... global variables, to encode debugging information in llvm IR. This is mostly a mechanical change that tests metadata support very well.

This change speeds up llvm-gcc by more then 6% at "-O0 -g" (measured by compiling InstructionCombining.cpp!)

llvm-svn: 79977

the command line.  This gives llvm-gcc developers
a way to control inlining (documented as "not intended
for end users").

llvm-svn: 79966

of an extracted block contains a PHI using a value defined in the extracted region.

With this patch, the partial inliner now passes MultiSource/Applications.

llvm-svn: 79963

When extracting SEME regions of code, the extractor needs to update the dominator tree for split return blocks.

llvm-svn: 79957

member out of line. ftostr is not particularly speedy,
so that method is presumably not perf sensitive.

llvm-svn: 79885

llvm-svn: 79852

llvm-svn: 79849

llvm-svn: 79836

llvm-svn: 79834

llvm-svn: 79832

update all code that this affects.

llvm-svn: 79830

This also updates dominator related stuff.

llvm-svn: 79825

llvm-svn: 79823

This required converting a bunch of stuff off DOUT and other cleanups.

llvm-svn: 79819

and hasNoSignedWrap, for consistency with the nuw and nsw properties.

llvm-svn: 79539

llvm-svn: 79493

available. This is very conservative for now.

llvm-svn: 79442

by hand, and fix a few places that were using hasInitializer() that
appear to depend on the initializer value.

llvm-svn: 79441

delete a newed pointer, and improve readability a little bit.

llvm-svn: 79411

llvm-svn: 79407

before performing optimizations based on constant string values.

llvm-svn: 79384

unruly indices for arrays that are members of structs.

llvm-svn: 79337

llvm-svn: 79306

llvm-svn: 79298

try to use i686-darwin to build for arm-eabi, you'll quickly run into
several false assumptions that the target OS must be the same as the
host OS. These patches split $(OS) into $(HOST_OS) and $(TARGET_OS) to
help builds like "make check" and the test-suite able to cross
compile. Along the way a target of *-unknown-eabi is defined as
"Freestanding" so that TARGET_OS checks have something to work with.

Patch by Sandeep Patel!

llvm-svn: 79296

llvm-svn: 79263

llvm-svn: 79252

that Value's operator<< doesn't include one.

llvm-svn: 79240

vector (&Formals[0]).  With this change llvm-gcc builds
with expensive checking enabled for C, C++ and Fortran.
While there, change a std::vector into a SmallVector.
This is partly gratuitous, but mostly because not all
STL vector implementations define the data method (and
it should be faster).

llvm-svn: 79237

llvm-svn: 79226

unfoldable references to a PHI node in the block being folded, and disable
the transformation in that case.  The correct transformation of such PHI
nodes depends on whether BB dominates Succ, and dominance is expensive 
to compute here.  (Alternatively, it's possible to check whether any 
uses are live, but that's also essentially a dominance calculation. 
Another alternative is to use reg2mem, but it probably isn't a good idea to
use that in simplifycfg.)

Also, remove some incorrect code from CanPropagatePredecessorsForPHIs 
which is made unnecessary with this patch: it didn't consider the case 
where a PHI node in BB has multiple uses.

llvm-svn: 79174

llvm-svn: 79134

blocks.

llvm-svn: 79132

llvm-svn: 78967

llvm-svn: 78955