otherwise labels get incorrectly merged.  We handled this by emitting a 
".byte 0", but this isn't correct on thumb/arm targets where the text segment
needs to be a multiple of 2/4 bytes.  Handle this by emitting a noop.  This
is more gross than it should be because arm/ppc are not fully mc'ized yet.

This fixes rdar://7908505

llvm-svn: 102400

traps flowing through memory references, add some text to
better cover phi nodes and externally-visible side effects,
add an example of instructions being control-dependent
on a trap value, and reword some of the existing trap rules.

llvm-svn: 102399

Radar 7896289

llvm-svn: 102396

to print the operand.

llvm-svn: 102395

llvm-svn: 102394

doesn't dominate the header is needed, don't check whether the increment
expression has computable loop evolution. While the operands of an
addrec are required to be loop-invariant, they're not required to 
dominate any part of the loop. This fixes PR6914.

llvm-svn: 102389

llvm-svn: 102387

intrinsics have volatile semantics in addition to the load and store
instructions.  

llvm-svn: 102384

onto control-dependent instructions.

llvm-svn: 102381

llvm-svn: 102380

llvm-svn: 102378

llvm-svn: 102376

llvm-svn: 102373

produces a comment on targets that support it, but
the Dwarf writer is not hooked up yet.

llvm-svn: 102372

DBG_VALUE, and a cautionary comment.

llvm-svn: 102371

llvm-svn: 102368

llvm-svn: 102366

alignment of globals with a specified alignment, we fix
common variables to obey their alignment.  Add a comment
explaining why this behavior is important.

llvm-svn: 102365

Re-enable 102323 with fix: do not update dbg_value's with incorrect frame indices when the live interval are being re-materialized.

llvm-svn: 102361

llvm-svn: 102359

llvm-svn: 102358

llvm-svn: 102354

SSAUpdater.  I'm going to try to refactor this to share most of the code
between them.

llvm-svn: 102353

llvm-svn: 102352

llvm-svn: 102327

llvm-svn: 102326

llvm-svn: 102325

llvm-svn: 102324

- Move TargetLowering::EmitTargetCodeForFrameDebugValue to TargetInstrInfo and rename it to emitFrameIndexDebugValue.
- Teach spiller to modify DBG_VALUE instructions to reference spill slots.

llvm-svn: 102323

form of DEBUG_VALUE, as it doesn't have reasonable default
behavior for unsupported targets.  Add a new hook instead.
No functional change.

llvm-svn: 102320

llvm-svn: 102319

llvm-svn: 102318

xs

llvm-svn: 102316

llvm-svn: 102309

llvm-svn: 102303

llvm-svn: 102301

preferred alignment unless they were common or some other special
case.

llvm-svn: 102300

llvm-svn: 102297

llvm-svn: 102296

gets placed inside a main function, and should not itself be a main
function. This is silently hidden in GCC-hosted builds because the
inner main looks like a nested function declaration, which GCC supports.
In builds with compilers which do not support nested functions (by default),
this was causing an error, which caused these autoconf checks to fail, 
leaving their options disabled.

This fixes test/Feature/load_module.ll on x86_64-unknown-linux-gnu
llvm-gcc selfhost builds, among other things.

This also includes a regenerated configure, as the diff is small and telling.

llvm-svn: 102288