that merely add passes. This allows them to be used with either
FunctionPassManager or PassManager, or even with a custom new
kind of pass manager.

llvm-svn: 48256

llvm-svn: 48255

llvm-svn: 48254

llvm-svn: 48253

before trying to merge the block into its predecessors.
This allows two-entry-phi-return.ll to be simplified
into a single basic block.

llvm-svn: 48252

optimized away before it tests what it is intended to test.

llvm-svn: 48251

llvm-svn: 48250

llvm-svn: 48249

llvm-svn: 48248

llvm-svn: 48247

llvm-svn: 48246

llvm-svn: 48245

llvm-svn: 48244

works, but probably won't if you mix it with 't' or 'u' yet.

llvm-svn: 48243

llvm-svn: 48241

llvm-svn: 48240

llvm-svn: 48239

llvm-svn: 48233

and has been removed.

llvm-svn: 48232

llvm-svn: 48229

Right now, the pass does not optimize tail recursions 
involving multiple return values.

llvm-svn: 48228

llvm-svn: 48227

add(Pass *) as a pure virtual member function. This will allow all
the various addPassesTo* functions in LLVM to avoid hard-coding what
type of PassManager is used. 

llvm-svn: 48226

llvm-svn: 48225

llvm-svn: 48224

llvm-svn: 48223

llvm-svn: 48222

llvm-svn: 48221

If there are multiple register classes that a register belongs to, return the super-class (e.g. on x86, returns GR32, not GR32_).

llvm-svn: 48220

llvm-svn: 48219

When the register allocator runs out of registers, spill a physical register around the def's and use's of the interval being allocated to make it possible for the interval to target a register and spill it right away and restore a register for uses. This likely generates terrible code but is before than aborting.

llvm-svn: 48218

llvm-svn: 48217

llvm-svn: 48216

enhancements.

llvm-svn: 48215

into:

_test:
	fldz
	ret

instead of:

_test:
	subl	$12, %esp
	#IMPLICIT_DEF %xmm0
	movsd	%xmm0, (%esp)
	fldl	(%esp)
	addl	$12, %esp
	ret

llvm-svn: 48213

llvm-svn: 48212

llvm-svn: 48211

llvm-svn: 48210

RET instruction instead of using FpSET_ST0_32.  This also generalizes
the code to handling returning of multiple FP results.

llvm-svn: 48209

llvm-svn: 48208