Speculatively revert the use of DenseMap in LazyValueInfo, which may be causing Linux self-host failures.

llvm-svn: 122291

llvm-svn: 122288

Revert r122114 (CallbackVH observing use-list changes) because it caused severe slowdowns on the Linux self-host configuration.

llvm-svn: 122279

Implement feedback from Bruno on making pblendvb an x86-specific ISD node in addition to being an intrinsic, and convert
lowering to use it.  Hopefully the pattern fragment is doing the right thing with XMM0, looks correct in testing.

llvm-svn: 122277

llvm-svn: 122276

Convert one of LVI's primary maps to a DenseMap, now that we know are more assured of iterator stability.

llvm-svn: 122273

llvm-svn: 122269

llvm-svn: 122268

the library unless *all* uses have been converted over to the new form.

llvm-svn: 122267

llvm-svn: 122265

it could only be tested indirectly, via instcombine, gvn or some other
pass that makes use of InstructionSimplify, which means that testcases
had to be carefully contrived to dance around any other transformations
that that pass did.

llvm-svn: 122264

llvm-svn: 122263

llvm-svn: 122261

llvm-svn: 122259

llvm-svn: 122258

llvm-svn: 122256

verify as being safe thanks its recent de-recursivization.

llvm-svn: 122254

llvm-svn: 122249

Teach InstCombine to merge (icmp ult (X + CA), C1) | (icmp eq X, C2) into (icmp ult (X + CA), C1 + 1) if C2 + CA == C1.

InstCombine creates these so now we compile x == 23 || x == 24 || x == 25 to
  %x.off = add i32 %x, -23
  %1 = icmp ult i32 %x.off, 3
instead of
  %x.off = add i32 %x, -23
  %1 = icmp ult i32 %x.off, 2
  %cmp3 = icmp eq i32 %x, 25
  %ret2 = or i1 %1, %cmp3

llvm-svn: 122248

llvm-svn: 122247

llvm-svn: 122246

(they had just been forgotten before).  Adding Xor causes "main" in the
existing testcase 2010-11-01-lshr-mask.ll to be hugely more simplified.

llvm-svn: 122245

llvm-svn: 122244

llvm-svn: 122243

llvm-svn: 122242

mayBeOverridden.

llvm-svn: 122241

revision id is appended to the LLVM version string. Defaults to
OFF.

Until now the VC revision id was always appended to the revision
string whenever cmake was invoked (either explicitly or implicitly
because a cmake source file changed). This was causing massive
recompilations because config.h are reconfigured with the new contents
of PACKAGE_VERSION.

llvm-svn: 122240

llvm-svn: 122239

llvm-svn: 122238

llvm-svn: 122237

to make sure that the reused alloca has sufficient alignment.

llvm-svn: 122236

llvm-svn: 122235

argument.  The generated alloca has to have at least the alignment of the
byval, if not, the client may be making assumptions that the new alloca won't
satisfy.

llvm-svn: 122234

llvm-svn: 122233

llvm-svn: 122232

out-edges. Fixes PR8824.

llvm-svn: 122228

begin at DEF slots. Fixes the second half of PR8813.

llvm-svn: 122225

llvm-svn: 122224

llvm-svn: 122222

ARM (and other 32-bit-only) targets support for i8 and i16 overflow 
multiplies.  The generated code isn't great, but this at least fixes
CodeGen/Generic/overflow.ll when running on ARM hosts.

llvm-svn: 122221