folding optimizations.

llvm-svn: 89109

distinguish between them and the more generic instructions (add, mov, and ldr).

llvm-svn: 89108

It was too difficult to keep the heuristics for merging and duplication
consistent.

llvm-svn: 89105

llvm-svn: 89082

llvm-svn: 89081

llvm-svn: 89076

llvm-svn: 89075

llvm-svn: 89066

libffi support and that the interpreter can't call external functions without
it. Patch by Timo Juhani Lindfors! Fixes PR5466.

llvm-svn: 89062

llvm-svn: 89056

more than one place. No intended functionality change.

llvm-svn: 89024

is analyzable so it can be updated. If it's not, be safe and don't move the
block.

llvm-svn: 89022

llvm-svn: 89021

llvm-svn: 89019

unconditional branches or fallthroghes. Instcombine/SimplifyCFG
should be simplifying branches with known conditions.

This fixes some problems caused by these transformations not
updating the MachineBasicBlock CFG.

llvm-svn: 89017

llvm-svn: 89016

right type.

llvm-svn: 89014

llvm-svn: 89011

0b1110 (ALways).  This is so that the disassembler decoder can distinguish among
BX_RET, BRIND, and BXr9.

llvm-svn: 89000

uninitialized memory.

llvm-svn: 88985

The large code model is documented at
http://www.x86-64.org/documentation/abi.pdf and says that calls should
assume their target doesn't live within the 32-bit pc-relative offset
that fits in the call instruction.

To do this, we turn off the global-address->target-global-address
conversion in X86TargetLowering::LowerCall(). The first attempt at
this broke the lazy JIT because it can separate the movabs(imm->reg)
from the actual call instruction. The lazy JIT receives the address of
the movabs as a relocation and needs to record the return address from
the call; and then when that call happens, it needs to patch the
movabs with the newly-compiled target. We could thread the call
instruction into the relocation and record the movabs<->call mapping
explicitly, but that seems to require at least as much new
complication in the code generator as this change.

To fix this, we make lazy functions _always_ go through a call
stub. You'd think we'd only have to force lazy calls through a stub on
difficult platforms, but that turns out to break indirect calls
through a function pointer. The right fix for that is to distinguish
between calls and address-of operations on uncompiled functions, but
that's complex enough to leave for someone else to do.

Another attempt at this defined a new CALL64i pseudo-instruction,
which expanded to a 2-instruction sequence in the assembly output and
was special-cased in the X86CodeEmitter's emitInstruction()
function. That broke indirect calls in the same way as above.

This patch also removes a hack forcing Darwin to the small code model.
Without far-call-stubs, the small code model requires things of the
JITMemoryManager that the DefaultJITMemoryManager can't provide.

Thanks to echristo for lots of testing!

llvm-svn: 88984

- Check memoperand alignment instead of checking stack alignment. Most load / store folding instructions are not referencing spill stack slots.
- Mark MOVUPSrm re-materializable.

llvm-svn: 88974

llvm-svn: 88973

Fix an expensive-checks error.

The Mask and LHSMask may not be of the same size, so don't do the
transformation if they're different.

llvm-svn: 88972

llvm-svn: 88964

llvm-svn: 88961

llvm-svn: 88956

llvm-svn: 88953

llvm-svn: 88940

llvm-svn: 88939

usage of block sizes and offsets.

llvm-svn: 88935

llvm-svn: 88933

llvm-svn: 88932

llvm-svn: 88929

llvm-svn: 88927

llvm-svn: 88919

Analyze has to be before checking the condition, obviously. Properly construct an iterator for prior.

llvm-svn: 88917

Support spill comments.

Have the asm printer emit a comment if an instruction is a spill or
reload and have the spiller mark copies it introdues so the asm printer
can also annotate those.

llvm-svn: 88911

llvm-svn: 88910

a name.

llvm-svn: 88908