Used to allow context sensitive printing of super-register or sub-register
references.

llvm-svn: 152043

Patch by Sean Silva!

llvm-svn: 152042

Specifically, remove the magic number when checking to see if the copy has a 
glue operand and simplify the checking logic.

rdar://10930395

llvm-svn: 152041

This was testing the handling of sub-register coalescing followed by
remat.  The original problem was caused by the extra <imp-def> operands
added by sub-register coalescing.  Those <imp-def> operands are not
added any longer, and the test case passes even when the original patch
is reverted.

llvm-svn: 152040

In this update:
- I assumed neon2 does not imply vfpv4, but neon and vfpv4 imply neon2.
- I kept setting .fpu=neon-vfpv4 code attribute because that is what the
assembler understands.

Patch by Ana Pazos <apazos@codeaurora.org>

llvm-svn: 152036

llvm-svn: 152035

llvm-svn: 152034

llvm-svn: 152028

llvm-svn: 152027

llvm-svn: 152026

This implicitly fixes a nasty bug in the GVN hashing (that thankfully
could only manifest as a performance bug): actually include the opcode
in the hash. The old code started the hash off with the opcode, but then
overwrote it with the type pointer.

Since this is likely to be pretty hot (GVN being already pretty
expensive) I've included a micro-optimization to just not bother with
the varargs hashing if they aren't present. I can't measure any change
in GVN performance due to this, even with a big test case like Duncan's
sqlite one. Everything I see is in the noise floor. That said, this
closes a loop hole for a potential scaling problem due to collisions if
the opcode were the differentiating aspect of the expression.

llvm-svn: 152025

hashing infrastructure. I wonder why we don't just use StringMap here,
and I may revisit the issue if I have time, but for now I'm just trying
to consolidate.

llvm-svn: 152023

complains about the truncation of a 64-bit constant to a 32-bit value
when size_t is 32-bits wide, but *only with static_cast*!!! The exact
signal that should *silence* such a warning, and in fact does silence it
with both GCC and Clang.

Anyways, this was causing grief for all the MSVC builds, so pointless
change made. Thanks to Nikola on IRC for confirming that this works.

llvm-svn: 152021

llvm-svn: 152019

llvm-svn: 152016

llvm-svn: 152014

The first def of a virtual register cannot also read the register.
Assert on such bad machine code instead of trying to fix it.
TwoAddressInstructionPass should never create code like that.

llvm-svn: 152010

We are already setting <undef> flags, and that is good enough. The
<imp-def> operands don't mean anything any more.

llvm-svn: 152009

MachineOperands that define part of a virtual register must have an
<undef> flag if they are not intended as read-modify-write operands.

The old trick of adding an <imp-def> operand doesn't work any longer.

Fixes PR12177.

llvm-svn: 152008

equalities into phi node operands for which the equality is known to
hold in the incoming basic block.  That's because replaceAllDominatedUsesWith
wasn't handling phi nodes correctly in general (that this didn't give wrong
results was just luck: the specific way GVN uses replaceAllDominatedUsesWith
precluded wrong changes to phi nodes).

llvm-svn: 152006

new hash_value infrastructure, and replace their implementations using
hash_combine. This removes a complete copy of Jenkin's lookup3 hash
function (which is both significantly slower and lower quality than the
one implemented in hash_combine) along with a somewhat scary xor-only
hash function.

Now that APInt and APFloat can be passed directly to hash_combine,
simplify the rest of the LLVMContextImpl hashing to use the new
infrastructure.

llvm-svn: 152004

llvm-svn: 152003

Some BBs can become dead after codegen preparation. If we delete them here, it
could help enable tail-call optimizations later on.
<rdar://problem/10256573>

llvm-svn: 152002

llvm-svn: 152001

llvm-svn: 152000

llvm-svn: 151999

llvm-svn: 151998

llvm-svn: 151996

Use uint8_t instead of enums to store values in X86 disassembler table. Shaves 150k off the size of X86DisassemblerDecoder.o

llvm-svn: 151995

llvm-svn: 151986

- Shrink the opcode field to 16 bits.
- Shrink the AsmVariantID field to 8 bits.
- Store the mnemonic string in a string table, store a 16 bit index.
- Store a pascal-style length byte in the string instead of a null terminator,
  so we can avoid calling strlen on every entry we visit during mnemonic search.

Shrinks X86AsmParser.o from 434k to 201k on x86_64 and eliminates relocs from the table.

llvm-svn: 151984

StringToOffsetTable: Allow uniquing the first element, add an option to skip appending a terminating null.

llvm-svn: 151983

While at it bump the small vector size a bit, it's inside a heap-allocated class.

llvm-svn: 151980

llvm-svn: 151979

llvm-svn: 151977

Move the NonPOD struct out of the anonymous namespace instead of adding llvm:: everywhere to fix the HashingTest on MSVC .

chandlerc proposed this better solution on IRC.

llvm-svn: 151974

llvm-svn: 151973

llvm-svn: 151971

unittests/ADT/HashingTest.cpp: Temporarily disable a new test introduced in r151891, to appease msvc.

llvm-svn: 151970

llvm-svn: 151968