3 Commits

Author	SHA1	Message	Date
Tim Northover	0487bd8f42	ARM: use target-specific SUBS node when combining cmp with cmov. ... This has two positive effects. First, using a custom node prevents recombination leading to an infinite loop since the output DAG is notionally a little more complex than the input one. Using a flag-setting instruction also allows the subtraction to be folded with the related comparison more easily. https://reviews.llvm.org/D53190 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@348122 91177308-0d34-0410-b5e6-96231b3b80d8	2018-12-03 11:16:21 +00:00
Roger Ferrer Ibanez	ca353f0f9c	[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 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@325323 91177308-0d34-0410-b5e6-96231b3b80d8	2018-02-16 09:23:59 +00:00
Sam Parker	6d5e445dba	[ARM] Swap cmp operands for automatic shifts ... Swap the compare operands if the lhs is a shift and the rhs isn't, as in arm and T2 the shift can be performed by the compare for its second operand. Differential Revision: https://reviews.llvm.org/D39004 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@316562 91177308-0d34-0410-b5e6-96231b3b80d8	2017-10-25 08:33:06 +00:00