responsible for figuring out what that's supposed to be on its own.

llvm-svn: 101844

where multiple blocks are emitted; functions which do this need to return
the new BB so that their callers can stay current.

llvm-svn: 101843

llvm-svn: 101832

and End arguments by-value rather than by-reference.

llvm-svn: 101830

an argument to things that need it.

llvm-svn: 101825

need it, just pass around the parent block of the current instruction
explicitly.

llvm-svn: 101822

llvm-svn: 101808

fetch one from the MachineFunction.

llvm-svn: 101807

llvm-svn: 101806

llvm-svn: 101805

than just getting one through a TargetLowering.

llvm-svn: 101802

SelectionDAG-specific.

llvm-svn: 101801

llvm-svn: 101655

llvm-svn: 101640

llvm-svn: 101639

llvm-svn: 101638

llvm-svn: 101637

const_casts, and it reinforces the design of the Target classes being
immutable.

SelectionDAGISel::IsLegalToFold is now a static member function, because
PIC16 uses it in an unconventional way. There is more room for API
cleanup here.

And PIC16's AsmPrinter no longer uses TargetLowering.

llvm-svn: 101635

the live-in sets of BBs in the loop. Otherwise later pass may end up using the
registers and override the invariant. rdar://7852937
No reasonablly sized test case possible.

llvm-svn: 101626

llvm-svn: 101622

llvm-svn: 101621

llvm-svn: 101620

just remove them all.  Radar 7873207 (working around the root problem of
Radar 7759363).

llvm-svn: 101604

Revert "Use a simpler data structure to calculate the least recently used register in RegAllocLocal."

This reverts commit 101392. It broke a buildbot.

llvm-svn: 101595

Probably the best way to know that all getOperand() calls have been handled
is to replace that API instead of updating.

llvm-svn: 101579

llvm-svn: 101575

This makes the local register allocator about 20% faster.

llvm-svn: 101574

(i32 sext_in_reg (i32 aext (i16 x)), i16) -> (i32 sext x). No known test case until -promote-16bit is enabled.

llvm-svn: 101551

SelectionDAG-specific parts of TargetLowering.

llvm-svn: 101537

llvm-svn: 101532

llvm-svn: 101501

llvm-svn: 101500

llvm-svn: 101480

llvm-svn: 101478

llvm-svn: 101477

with a fix for self-hosting

rotate CallInst operands, i.e. move callee to the back
of the operand array

the motivation for this patch are laid out in my mail to llvm-commits:
more efficient access to operands and callee, faster callgraph-construction,
smaller compiler binary

llvm-svn: 101465

JIT doesn't use the MC back-end asm printer to emit labels that it uses, the
section for the MCSymbol is never set. And thus the MCSymbol for the EH label
isn't marked as "defined". Because of that, TidyLandingPads removes the needed
landing pads from the JIT output. This breaks EH for every JIT program.

This is a work-around for this limitation. We pass in the label locations
map. If the label has a non-zero value, then it was "emitted" by the JIT and
TidyLandingPads shouldn't remove that label.

A nicer solution would be to mark the MCSymbol as "used" by the JIT and not rely
upon the section being set to determine if it's defined or not.

llvm-svn: 101453

Adding support for dag combiner to promote operations for profit. This requires target specific queries. For example, x86 should promote i16 to i32 when it does not impact load folding.
x86 support is off by default. It can be enabled with -promote-16bit.

Work in progress.

llvm-svn: 101448

llvm-svn: 101443

llvm-svn: 101434