eliminates almost one node per block in common cases.

llvm-svn: 24254

turn power-of-two multiplies into shifts early to improve compile time.

llvm-svn: 24253

llvm-svn: 24252

Change the ValueList array for each node to be shared instead of individuallyallocated.  Further, in the common case where a node has a single value, justreference an element from a small array.  This is a small compile-time win.

llvm-svn: 24251

allocated.  Further, in the common case where a node has a single value, just
reference an element from a small array.  This is a small compile-time wi.

llvm-svn: 24250

Switch the operandlist/valuelist from being vectors to being just an array.This saves 12 bytes from SDNode, but doesn't speed things up substantially
(our graphs apparently already fit within the cache on my g5).  In any case
this reduces memory usage.

llvm-svn: 24249

This saves 12 bytes from SDNode, but doesn't speed things up substantially
(our graphs apparently already fit within the cache on my g5).  In any case
this reduces memory usage.

llvm-svn: 24248

llvm-svn: 24247

llvm-svn: 24246

llvm-svn: 24244

llvm-svn: 24243

llvm-svn: 24242

set and eliminating the need to iterate whenever something is removed (which
can be really slow in some cases).  Thx to Jim for pointing out something silly
I was getting stuck on. :)

llvm-svn: 24241

not spending tons of time microoptimizing it.  This is useful for an -O0
style of build.

llvm-svn: 24235

llvm-svn: 24234

Add a new option to indicate we want the code generator to emit code quickly,not spending tons of time microoptimizing it.  This is useful for an -O0style of build.

llvm-svn: 24233

llvm-svn: 24231

llvm-svn: 24228

llvm-svn: 24227

llvm-svn: 24226

love (especially with -sched=simple)

llvm-svn: 24225

alignment information appropriately.  Includes code for PowerPC to support
fixed-size allocas with alignment larger than the stack.  Support for
arbitrarily aligned dynamic allocas coming soon.

llvm-svn: 24224

llvm-svn: 24223

llvm-svn: 24222

llvm-svn: 24221

llvm-svn: 24220

llvm-svn: 24219

llvm-svn: 24218

llvm-svn: 24217

llvm-svn: 24216

llvm-svn: 24213

llvm-svn: 24212

llvm-svn: 24211

at Jim's request for the checking code.

llvm-svn: 24210

llvm-svn: 24209

llvm-svn: 24208

llvm-svn: 24207

a bunch of other things) but is currently ignored by the code
generator.

llvm-svn: 24206

allocations

llvm-svn: 24205

llvm-svn: 24204