llvm-svn: 47992

llvm-svn: 47966

and add some protection against creating such.

llvm-svn: 47957

except ppc long double.  This allows us to shrink constant pool
entries for x86 long double constants, which in turn allows us to
use flds/fldl instead of fldt.

llvm-svn: 47938

all the way to float, not stopping at double.

llvm-svn: 47937

bug in r47928 (Int64Ty is the correct type for the constant
pool entry here) and removes the asserts, now that the code
is capable of handling i128.

llvm-svn: 47932

For x86, if sse2 is available, it's not a good idea since cvtss2sd is slower than a movsd load and it prevents load folding. On x87, it's important to shrink fp constant since fldt is very expensive.

llvm-svn: 47931

llvm-svn: 47929

llvm-svn: 47928

findRegisterUseOperandIdx, findRegisterDefOperandIndx. Fix some naming inconsistencies.

llvm-svn: 47927

The basic idea is that all these algorithms are computing the longest paths from the root node or to the exit node. Therefore the existing implementation that uses and iterative and potentially
exponential algorithm was changed to a well-known graph algorithm based on dynamic programming. It has a linear run-time.

llvm-svn: 47884

Refactor ExpandConstantFP so it can optimize load from constpool of types larger than f64 into extload from smaller types.

llvm-svn: 47883

llvm-svn: 47875

llvm-svn: 47872

- Cleaned up how the prologue-epilogue inserter loops over the instructions.
- Instead of restarting the processing of an instruction if we remove an
  implicit kill, just update the end iterator and make sure that the iterator
  isn't incremented.

llvm-svn: 47870

llvm-svn: 47869

llvm-svn: 47868

llvm-svn: 47867

llvm-svn: 47866

llvm-svn: 47864

marking both a super- and sub-register as "killed". This removes implicit uses
that are marked as "killed".

llvm-svn: 47862

registers.

llvm-svn: 47861

the register scavenger to process all of those new instructions instead of just
the last one inserted.

llvm-svn: 47860

llvm-svn: 47798

unaligned load/store code using them.  Per review
of unaligned load/store vector patch.

llvm-svn: 47782

llvm-svn: 47779

llvm-svn: 47765

that instruction as its "last use". This fixes PR1925.

llvm-svn: 47758

llvm-svn: 47755

No need for coalescer to update kills. Only copies are coalesced and those instructions will be deleted. Doh.

llvm-svn: 47749

llvm-svn: 47748

llvm-svn: 47746

which allows more of the surrounding arithmetic to be done with APInt
instead of uint64_t.

llvm-svn: 47745

an APInt into a uint64_t to call getConstant.

llvm-svn: 47742

llvm-svn: 47736

generic & x86 versions; change generic to follow x86
and improve comments.  Add PPC version (not right
for non-Darwin.)

llvm-svn: 47734

llvm-svn: 47722

llvm-svn: 47710

llvm-svn: 47708

llvm-svn: 47703