Add a restore folder, which shaves a dozen or so machineinstrs off oggenc.  Update a testcase to check this.

llvm-svn: 66029

because less bytes are allocated and subobject construction is gone.
For reference how it works, see BasicBlock.h.
Btw. it is very assuring to see that somebody has invented
this ilist-embedded sentinel technique before me :-)

llvm-svn: 66026

llvm-svn: 66024

llvm-svn: 66021

llvm-svn: 66008

llvm-svn: 66006

result from add, sub, inc, and dec instructions in simple cases.

llvm-svn: 66004

llvm-svn: 66001

llvm-svn: 66000

per Chris' suggestion.  Slightly faster.

llvm-svn: 65999

Fix PR3701. 1. X86 target renamed eflags register to flags. This matches what llvm-gcc generates so codegen knows flags register is being clobbered by inline asm. 2. BURR scheduler should also check if inline asm nodes can clobber "live" physical registers. Previously it was only checking target nodes with implicit defs.

llvm-svn: 65996

If a global constant is dead then global's debug info should not prevent the optimizer in deleting the global. And while deleting global, delete global's debug info also.

llvm-svn: 65994

when counting work; it was only off by 1.

llvm-svn: 65993

While the patch is clearly correct in itself, it's become
apparent other places are assuming debug intrinsics are
marked as touching memory...this needs more testing.

llvm-svn: 65992

so it changed it into a 31 via the TLO.ShrinkDemandedConstant() call. Then it
would go through the DAG combiner again. This time it had a value of 31, which
was turned into a -1 by TLI.SimplifyDemandedBits(). This would ping pong
forever.

Teach the TLO.ShrinkDemandedConstant() call not to lower a value if the demanded
value is an XOR of all ones.

llvm-svn: 65985

caused them to be considered trivially dead.  Fix this.

llvm-svn: 65979

feed into llvm.dbg.declare nodes, as well as
the debug directives themselves.

llvm-svn: 65976

llvm-svn: 65975

llvm-svn: 65971

use, check also for the case where it has two uses,
the other being a llvm.dbg.declare.  This is needed so
debug info doesn't affect codegen.

llvm-svn: 65970

llvm-svn: 65967

instructions. These aren't used yet.

llvm-svn: 65965

llvm-svn: 65962

llvm-svn: 65961

llvm-svn: 65960

llvm-svn: 65953

llvm-svn: 65945

This is a template that can be used to build your own LLVMC-based drivers.
It can be also useful as a "bare-bones" LLVMC.

llvm-svn: 65944

llvm-svn: 65943

llvm-svn: 65942

Since this Makefile is supposed to be usable from LLVM-based projects not in the
tree, LLVMLIBS should be used instead of USEDLIBS. This depends on my previous
fix to Makefile.rules.

llvm-svn: 65941

From the code: "There are "Proj" libs (defined by the user's project) and "LLVM"
libs (defined by the LLVM project)." LINK_COMPONENTS are clearly defined by the
LLVM project.

Additionally, this fixes an issue with llvmc's build process:-)

llvm-svn: 65940

llvm-svn: 65939

llvm-svn: 65938

llvm-svn: 65936

llvm-svn: 65934

llvm-svn: 65931

llvm-svn: 65928

llvm-svn: 65927

llvm-svn: 65922