llvm-svn: 84682

llvm-svn: 84681

llvm-svn: 84658

llvm-svn: 84657

of the register in the instruction which kills the scavenged value.

llvm-svn: 84641

tracked. Instead of trying to manually keep track of these locations
while doing complex modifications, just recompute them when they're needed.
This fixes a bug in which the TopMBB and BotMBB were not correctly updated,
leading to invalid transformations.

llvm-svn: 84598

llvm-svn: 84597

llvm-svn: 84596

llvm-svn: 84586

llvm-svn: 84585

appropriate restore location for the spill as well as perform the actual
save and restore.

The Thumb1 target uses this to make sure R12 is not clobbered while a spilled
scavenger register is live there.

llvm-svn: 84554

llvm-svn: 84516

llvm-svn: 84504

llvm-svn: 84503

llvm-svn: 84432

stack slots and giving them different PseudoSourceValue's did not fix the
problem of post-alloc scheduling miscompiling llvm itself.
- Apply Dan's conservative workaround by assuming any non fixed stack slots can
alias other memory locations. This means a load from spill slot #1 cannot 
move above a store of spill slot #2. 
- Enable post-alloc scheduling for x86 at optimization leverl Default and above.

llvm-svn: 84424

llvm-svn: 84411

llvm-svn: 84372

llvm-svn: 84327

Distinquish stack slots from other stack objects. They (and fixed objects) get FixedStack PseudoSourceValues.

llvm-svn: 84326

llvm-svn: 84321

necessarily fixed. Only those will negative frame indices are "fixed."

llvm-svn: 84315

llvm-svn: 84311

llvm-svn: 84300

llvm-svn: 84299

to be more general and understand more varieties of loops.

Teach CodePlacementOpt to reorganize the basic blocks of a loop so that
they are contiguous. This also includes a fair amount of logic for preserving
fall-through edges while doing so. This fixes a BranchFolding-ism where blocks
which can't be made to use a fall-through edge and don't conveniently fit
anywhere nearby get tossed out to the end of the function.

llvm-svn: 84295

llvm-svn: 84279

llvm-svn: 84276

llvm-svn: 84273

If there is not any llvm instruction associated with each lexical scope encoded in debug info then create such scope on demand for variable info.

llvm-svn: 84262

llvm-svn: 84248

llvm-svn: 84247

llvm-svn: 84244

llvm-svn: 84193

header is just the entry block to the loop, and it needn't be at
the top of the loop in the code layout.

Remove the code that suppressed loop alignment for outer loops,
so that outer loops are aligned.

llvm-svn: 84158

When LiveVariables is adding implicit-def to model "partial dead", add the earlyclobber marker if the superreg def has it.

llvm-svn: 84153

llvm-svn: 84152

llvm-svn: 84138

llvm-svn: 84134

llvm-svn: 84133