llvm-svn: 118916

We only produce debug line information if we have seen a line directive, so
this code is dead. Also, if we want to be bug by bug compatible with
gas and sometimes produce "empty" .debug_line sections, this will
match the content produced by gas.

llvm-svn: 118914

llvm-svn: 118913

llvm-svn: 118908

llvm-svn: 118907

llvm-svn: 118906

llvm-svn: 118905

catastrophic compilation time in the event of unreasonable LLVM
IR. Code quality is a separate issue--someone upstream needs to do a
better job of reducing to llvm.memcpy. If the situation can be reproduced with
any supported frontend, then it will be a separate bug.

llvm-svn: 118904

llvm-svn: 118903

llvm-svn: 118896

llvm-svn: 118893

at least.

llvm-svn: 118890

support for the case where alignment<value size.

These cases were silently miscompiled before this patch.
Now they are overly verbose -especially storing is- and
any front-end should still avoid misaligned memory 
accesses as much as possible. The bit juggling algorithm
added here probably has some room for improvement still.

llvm-svn: 118889

missed. Update some comments accordingly.

Fixes rdar://8652289

llvm-svn: 118888

llvm-svn: 118884

llvm-svn: 118883

one store dead. This is especially noticeable in
SingleSource/Benchmarks/Shootout/objinst.

llvm-svn: 118875

llvm-svn: 118874

llvm-svn: 118865

llvm-svn: 118864

llvm-svn: 118863

llvm-svn: 118862

llvm-svn: 118859

llvm-svn: 118854

llvm-svn: 118848

llvm-svn: 118846

and vaarg instructions.

llvm-svn: 118845

Fix minimum 16-bit signed value error exposed by MC asm parser tests
Add initial MC asm parser tests for the MBlaze backend

llvm-svn: 118844

llvm-svn: 118843

llvm-svn: 118842

testing for dereferenceable pointers into a helper function,
isDereferenceablePointer.  Teach it how to reason about GEPs
with simple non-zero indices.

Also eliminate ArgumentPromtion's IsAlwaysValidPointer,
which didn't check for weak externals or out of range gep
indices.

llvm-svn: 118840

llvm-svn: 118837

llvm-svn: 118836

llvm-svn: 118835

llvm-svn: 118831

llvm-svn: 118829

llvm-svn: 118827

llvm-svn: 118823

llvm-svn: 118822

Add support for Thumb2 encodings of NEON data processing instructions, using the new PostEncoderMethod infrastructure.
More tests to come.

llvm-svn: 118819