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3 Commits

Author SHA1 Message Date
Roger Ferrer Ibanez
90e010bd3c [ARM] Materialise some boolean values to avoid a branch 
This patch combines some cases of ARMISD::CMOV for integers that arise in comparisons of the form

  a != b ? x : 0
  a == b ? 0 : x

and that currently (e.g. in Thumb1) are emitted as branches.

Differential Revision: https://reviews.llvm.org/D34515

llvm-svn: 325323
 2018-02-16 09:23:59 +00:00
James Molloy
f2a11b35fc [Thumb] Fix off-by-one error in r272007 
We can only generate immediates up to #510 with a MOV+ADD, not #511, because there's no such instruction as add #256.

Found by Oliver Stannard and csmith!

llvm-svn: 272665
 2016-06-14 13:33:07 +00:00
James Molloy
bab28a1f85 [Thumb-1] Add optimized constant materialization for integers [256..512) 
We can materialize these integers using a MOV; ADDi8 pair.

llvm-svn: 272007
 2016-06-07 13:10:14 +00:00