review feedback from Chris quite a while ago. No functionality
change.

llvm-svn: 49348

in both time and memory savings for GVN.  For example, one testcase went from 10.5s to 6s with
this patch.

llvm-svn: 49345

llvm-svn: 49339

llvm-svn: 49338

needs to be fixed here - a previous commit made sure
that intrinsics always get the right attributes.
So remove no-longer needed code, and while there use
Intrinsic::getDeclaration rather than getOrInsertFunction. 

llvm-svn: 49337

intrinsics.  Fix up the argument type (should
be i8*, was an array*).

llvm-svn: 49336

right parameter attributes no matter how they
are obtained.

llvm-svn: 49335

by Dan Gohman is fixed.

llvm-svn: 49330

allocations, which GVN can't optimize anyways.

llvm-svn: 49329

nounwind.  When such calls are inlined into something
else that is invoked, they were getting changed to invokes,
which is badness.

llvm-svn: 49299

llvm-svn: 49293

llvm-svn: 49285

llvm-svn: 49284

llvm-svn: 49283

llvm-svn: 49282

If it cannot be expanded, it will keep the old behaviour and try to shrink the constant.
Part of enhancement for PR2191.

llvm-svn: 49280

Specifically, introduction of XXX::Create methods
for Users that have a potentially variable number of
Uses.

llvm-svn: 49277

llvm-svn: 49248

2. Coalescer can now create an interesting situation where a register def can
   reaches itself without being killed.

llvm-svn: 49246

llvm-svn: 49244

before an invoke.  Failure to do this causes references in
the landing pad to variables that were not set.  Fixes
g++.dg/eh/delayslot1.C
g++.dg/eh/fp-regs.C
g++.old-deja/g++.brendan/eh1.C

llvm-svn: 49243

llvm-svn: 49218

tools.  This is currently only enabled on the mac, but could easily be
supported by other hosts that are interested.

llvm-svn: 49207

llvm-svn: 49206

llvm-svn: 49198

llvm-svn: 49197

if some functions don't have debug info, we were outputing the same label at the start of each of those functions.  This makes assemblers unhappy

llvm-svn: 49176

- Be smarter about coalescing copies from implicit_def.

llvm-svn: 49168

llvm-svn: 49167

- Eliminate an implicit_def when it's being spilled.

llvm-svn: 49166

- Be (slightly) smarter about where to place the copies.

llvm-svn: 49165

There is no point in creating a long live range defined by an implicit_def. Scheduler now duplicates implicit_def instruction for each of its uses. Therefore, if an implicit_def node has multiple uses, it will become a number of very short live ranges, rather than a long one. This will make coalescer's job easier.

llvm-svn: 49164

This method allows one to create a directory, and optionally create all parent
directories that do not exist.

The original implementation would require that *all* directories along a path
are writable by the user, including directories that already exist. For example,
suppose we wanted to create the directory "/tmp/foo/bar", and the directory
"/tmp" already exists, but not "/tmp/foo". Since "/tmp" is writable by all
users, the original implementation would work, and create "/tmp/foo", followed
by "/tmp/bar".

A problem occurred, however if one wanted to created the directory
"/Users/myuser/bar" (or equivalently "/home/myuser/bar"), and "/Users/myuser"
already existed and is writable by the current user. The directory
"/User/myuser" is writable by the user, but "/User" is not. The original
implementation of createDirectoryOnDisk would return with failure since "/User"
is not writable, even though "/User/mysuser" is writable.

The new implementation works by recursively creating parents as needed, and thus
doesn't need to check the permissions on every directory in a path.

llvm-svn: 49162

llvm-svn: 49158

Fix x86-64 encoding bug. REX prefix must always follow 0x0F prefix. For example, extractps in 64bit mode: 66 REX 0F 3A 17, not 66 0F 3A REX 17.

llvm-svn: 49157

llvm-svn: 49156

llvm-svn: 49129

llvm-svn: 49124

it causes compile errors.

llvm-svn: 49122

StripSymbols when EH is on.

llvm-svn: 49110