of a pointer/int pair instead of a manually bitmangled pointer.
This forces clients to think a little more about checking the 
appropriate pieces and will be useful for internal 
implementation improvements later.

I'm not particularly happy with this.  After going through this
I don't think that the clients of memdep should be exposed to
the internal type at all.  I'll fix this in a subsequent commit.

This has no functionality change.

llvm-svn: 60230

llvm-svn: 60229

llvm-svn: 60228

llvm-svn: 60227

llvm-svn: 60225

pointer and integer type to be used.

llvm-svn: 60224

properly updates the reverse dependency map when it installs updated 
dependencies for instructions that depend on the removed instruction.

llvm-svn: 60222

llvm-svn: 60221

llvm-svn: 60220

no functionality change.

llvm-svn: 60219

llvm-svn: 60218

llvm-svn: 60217

This shows the root problem behind PR3141.

llvm-svn: 60216

but it doesn't make any sense at all.

Also make the method const, private, and fit in 80 cols while we're at it.

llvm-svn: 60215

llvm-svn: 60214

llvm-svn: 60213

llvm-svn: 60211

predecessor is itself.  This doesn't make sense, and this is
a dead infinite loop anyway.

llvm-svn: 60210

gcc 4.4 (due to use of sprintf).

llvm-svn: 60209

being both a namespace and a variable name.

llvm-svn: 60208

formulation that doesn't require set lookups or scanning a set.

llvm-svn: 60203

nothing to do with dead instruction elimination.  No tests in
dejagnu depend on this, so I don't know what it was needed for.

llvm-svn: 60202

elimination to use more modern infrastructure.  Also do a bunch
of small cleanups.

llvm-svn: 60201

llvm-svn: 60200

Support multiple compilation graph definitions. Not terribly useful, but makes the code more generic.

llvm-svn: 60199

llvm-svn: 60198

llvm-svn: 60197

RecursivelyDeleteTriviallyDeadInstructions.

llvm-svn: 60196

making it use RecursivelyDeleteTriviallyDeadInstructions to do
the heavy lifting.

llvm-svn: 60195

PHIs dead if they are single-value.

llvm-svn: 60194

return a list of deleted instructions.

llvm-svn: 60193

llvm-svn: 60192

wrappers around the interesting code and use an obscure iterator
abstraction that dates back many many years.

Move EraseDeadInstructions to Transforms/Utils and name it
RecursivelyDeleteTriviallyDeadInstructions.

llvm-svn: 60191

llvm-svn: 60190

llvm-svn: 60189

llvm-svn: 60188

llvm-svn: 60187

llvm-svn: 60186

by 1, as well as multiply by -1.

llvm-svn: 60182

it ends up being the entry block.

llvm-svn: 60180