to find a tiny mouse hole to squeeze through, it struck
me that globals without a name can be considered internal
since they can't be referenced from outside the current
module.  This patch makes GlobalOpt give them internal
linkage.  Also done for aliases even though they always
have names, since in my opinion anonymous aliases should
be allowed for consistency with global variables and
functions.  So if that happens one day, this code is ready!

llvm-svn: 66267

llvm-svn: 66262

llvm-svn: 66255

llvm-svn: 66252

their main routines.  This makes the tools print their argc/argv
commands if they crash.

llvm-svn: 66248

llvm-svn: 66245

llvm-svn: 66244

This is needed so debug info doesn't change codegen.

llvm-svn: 66235

llvm-svn: 66233

We are still not out of woods yet.

llvm-svn: 66232

llvm-svn: 66227

debug intrinsics correctly.

llvm-svn: 66225

llvm-svn: 66224

llvm-svn: 66223

If non constant local GV named A is used by a constant local GV named B (e.g. llvm.dbg.variable) and B is not used by anyone else then eliminate A as well as B.

In other words, debug info should not interfere in removal of unused GV.
--This life, and those below, will be ignored--

M    test/Transforms/GlobalOpt/2009-03-03-dbg.ll
M    lib/Transforms/IPO/GlobalOpt.cpp

llvm-svn: 66167

llvm-svn: 66140

codegen.  I convinced myself it was OK to skip all
pointer bitcasts here too.

llvm-svn: 66122

llvm-svn: 66115

had 2 uses instead of 1.

llvm-svn: 66112

llvm-svn: 66083

was causing llvm-gcc to fail to build.  I've
verified it bootstraps now; good enough for me.

llvm-svn: 66073

llvm-svn: 66065

immediately obvious.

llvm-svn: 66062

llvm-svn: 66055

llvm-svn: 66054

onto element accesses.

llvm-svn: 66053

llvm-svn: 66001

llvm-svn: 66000

per Chris' suggestion.  Slightly faster.

llvm-svn: 65999

If a global constant is dead then global's debug info should not prevent the optimizer in deleting the global. And while deleting global, delete global's debug info also.

llvm-svn: 65994

when counting work; it was only off by 1.

llvm-svn: 65993

caused them to be considered trivially dead.  Fix this.

llvm-svn: 65979

feed into llvm.dbg.declare nodes, as well as
the debug directives themselves.

llvm-svn: 65976

llvm-svn: 65971

use, check also for the case where it has two uses,
the other being a llvm.dbg.declare.  This is needed so
debug info doesn't affect codegen.

llvm-svn: 65970

llvm-svn: 65961

llvm-svn: 65960

llvm-svn: 65945

and put @file directives on their own comment line.

llvm-svn: 65920

(lest they affect codegen).

llvm-svn: 65915