llvm-svn: 48543

Fix X86's isTruncateFree to not claim that truncate to i1 is free. This fixes Bill's testcase that failed for r48491.

llvm-svn: 48542

llvm-svn: 48538

llvm-svn: 48536

struct types.  Patch by David Chisnall, with some tweaks.

llvm-svn: 48531

llvm-svn: 48530

llvm-svn: 48529

llvm-svn: 48528

llvm-svn: 48527

llvm-svn: 48526

Based on Erick Tryzelaar's patch.

llvm-svn: 48523

1. If part of a register is re-defined, an implicit kill and an implicit def are added to denote read / mod / write. However, this should only be necessary if the register is actually read later. This is a performance issue.
2. If a sub-register is being defined, and it doesn't have a previous use, do not add a implicit kill to the last use of a super-register:
   = EAX, AX<imp-use,kill>
...
AX =
In this case, EAX is live but AX is killed, this is wrong and will cause the coalescer to do bad things.

llvm-svn: 48521

llvm-svn: 48520

attribute instead of ".protected".

llvm-svn: 48516

Fix a x86-64 isel lowering bug that's been around forever. A x86-64 varargs function implicitly reads X86::AL, don't clobber it!

llvm-svn: 48515

for Release with optimization levels greater than -O0.

llvm-svn: 48513

llvm-svn: 48511

llvm-svn: 48510

llvm-svn: 48509

Do not pass -g flag when compiling tests, so remove the C.Flags. This only happens if you have a debug build of llvm.

llvm-svn: 48498

llvm-svn: 48493

variables and methods themselves only use unsigned.)

llvm-svn: 48492

Target independent DAG transform to use truncate for field extraction + sign extend on targets where this is profitable. Passes nightly on x86-64.

llvm-svn: 48491

Rewrite code that propagate isDead information after a dead copy is coalesced. This remove some ugly spaghetti code and fixed a number of subtle bugs.

llvm-svn: 48490

llvm-svn: 48484

llvm-svn: 48483

llvm-svn: 48478

Do not run analysis pass again if analysis info is still available.
This fixes PR1441.

llvm-svn: 48476

llvm-svn: 48474

in ppc64 mode.

llvm-svn: 48459

about sret made by the optimizers.

llvm-svn: 48452

llvm-svn: 48451

llvm-svn: 48450

lowering over to SparcCallingConv.td.  We can't make the switch
yet because we can't say to pass f64 registers in 2 x i32 registers
with the td file yet.

llvm-svn: 48449

llvm-svn: 48448

llvm-svn: 48447

the coalescer.  This doesn't really work, but gets us farther than
before.

llvm-svn: 48446

llvm-svn: 48445

other targets.  Use autogenerated calling conv to lower result of
calls.

llvm-svn: 48444

return lowering first.  This fixes a bug where the top and bottom
of i64 values were returned in the wrong registers before.

llvm-svn: 48443