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Author SHA1 Message Date
Eli Friedman b09c778715 Revert r344693 ("[ARM] bottom-top mul support in ARMParallelDSP") 
Still causing failures on the polly-aosp buildbot; I'll follow up
with a reduced testcase.

llvm-svn: 344752
 2018-10-18 19:34:30 +00:00
Sam Parker 2ef3c0dad6 [ARM] bottom-top mul support in ARMParallelDSP 
Previously reverted in rL343082.

Original commit message:

On failing to find sequences that can be converted into dual macs,
try to find sequential 16-bit loads that are used by muls which we
can then use smultb, smulbt, smultt with a wide load.

Differential Revision: https://reviews.llvm.org/D51983

llvm-svn: 344693
 2018-10-17 13:02:48 +00:00
Sam Parker 01db2983cd [ARM] Add smlald support in ARMParallelDSP 
Search from i64 reducing phis, as well as i32, to allow the
generation of smlald instructions.

Differential Revision: https://reviews.llvm.org/D51101

llvm-svn: 341941
 2018-09-11 14:01:22 +00:00