llvm-project

Commit Graph

Author	SHA1	Message	Date
Roger Ferrer Ibanez	d41059a9f6	[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	65b6be1d3a	[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	b101383fb5	[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

Author

SHA1

Message

Date

Roger Ferrer Ibanez

d41059a9f6

[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

65b6be1d3a

[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

b101383fb5

[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

3 Commits