Commit Graph

13 Commits

Author SHA1 Message Date
Hal Finkel f2dcb9a9c4 Allow BBVectorize to form non-2^n-length vectors.
The original algorithm only used recursive pair fusion of equal-length
types. This is now extended to allow pairing of any types that share
the same underlying scalar type. Because we would still generally
prefer the 2^n-length types, those are formed first. Then a second
set of iterations form the non-2^n-length types.

Also, a call to SimplifyInstructionsInBlock has been added after each
pairing iteration. This takes care of DCE (and a few other things)
that make the following iterations execute somewhat faster. For the
same reason, some of the simple shuffle-combination cases are now
handled internally.

There is some additional refactoring work to be done, but I've had
many requests for this feature, so additional refactoring will come
soon in future commits (as will additional test cases).

llvm-svn: 159330
2012-06-28 05:42:42 +00:00
Hal Finkel 3099ce9489 Allow controlling vectorization of boolean values separately from other integer types.
These are used as the result of comparisons, and often handled differently from larger integer types.

llvm-svn: 159111
2012-06-24 13:28:01 +00:00
Hal Finkel 4b06b1a0ee Allow BBVectorize to fuse compare instructions.
llvm-svn: 159088
2012-06-23 21:52:50 +00:00
Hal Finkel fa103d3fc7 Teach BBVectorize to combine, when possible, or discard metadata when fusing instructions.
The present implementation handles only TBAA and FP metadata, discarding everything else.
For debug metadata, the current behavior is maintained (the debug metadata associated with
one of the instructions will be kept, discarding that attached to the other).

This should address PR 13040.

llvm-svn: 158606
2012-06-16 20:34:06 +00:00
Hal Finkel 27c3246169 Don't vectorize target-specific types (ppc_fp128, x86_fp80, etc.).
Target specific types should not be vectorized. As a practical matter,
these types are already register matched (at least in the x86 case),
and codegen does not always work correctly (at least in the ppc case,
and this is not worth fixing because ppc_fp128 is currently broken and
will probably go away soon).

llvm-svn: 155729
2012-04-27 19:34:00 +00:00
Hal Finkel 83c9796033 Fix an error in BBVectorize important for vectorizing pointer types.
When vectorizing pointer types it is important to realize that potential
pairs cannot be connected via the address pointer argument of a load or store.
This is because even after vectorization, the address is still a scalar because
the address of the higher half of the pair is implicit from the address of the
lower half (it need not be, and should not be, explicitly computed).

llvm-svn: 154735
2012-04-14 07:32:50 +00:00
Hal Finkel f589519a67 Enhance BBVectorize to more-properly handle pointer values and vectorize GEPs.
llvm-svn: 154734
2012-04-14 07:32:43 +00:00
Hal Finkel b2336a79f9 Add support to BBVectorize for vectorizing selects.
llvm-svn: 154700
2012-04-13 20:45:45 +00:00
Hal Finkel 5cad8742cc Correctly vectorize powi.
The powi intrinsic requires special handling because it always takes a single
integer power regardless of the result type. As a result, we can vectorize
only if the powers are equal. Fixes PR12364.

llvm-svn: 153797
2012-03-31 03:38:40 +00:00
Eli Bendersky 924f9a671d Replace all instances of dg.exp file with lit.local.cfg, since all tests are run with LIT now and now Dejagnu. dg.exp is no longer needed.
Patch reviewed by Daniel Dunbar. It will be followed by additional cleanup patches.

llvm-svn: 150664
2012-02-16 06:28:33 +00:00
Hal Finkel 1bde3f86d1 Update BBVectorize to use aliasesUnknownInst.
This allows BBVectorize to check the "unknown instruction" list in the
alias sets. This is important to prevent instruction fusing from reordering
function calls. Resolves PR11920.

llvm-svn: 150250
2012-02-10 15:52:40 +00:00
Hal Finkel 135cac922c Boost the effective chain depth of loads and stores.
By default, boost the chain depth contribution of loads and stores. This will allow a load/store pair to vectorize even when it would not otherwise be long enough to satisfy the chain depth requirement.

llvm-svn: 149761
2012-02-04 04:14:04 +00:00
Hal Finkel c34e51132c Add a basic-block autovectorization pass.
This is the initial checkin of the basic-block autovectorization pass along with some supporting vectorization infrastructure.
Special thanks to everyone who helped review this code over the last several months (especially Tobias Grosser).

llvm-svn: 149468
2012-02-01 03:51:43 +00:00