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| author | Sanjay Patel <spatel@rotateright.com> | 2018-02-05 17:53:29 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2018-02-05 17:53:29 +0000 |
| commit | e9a153f4145d6f78f1f1cd0b6205319f236e5fa4 (patch) | |
| tree | ae5f56be601488b08192bb614a509afc880570a9 /lldb/unittests/ObjectFile | |
| parent | 4f0331251f567b3edb5f55aa0543dc03041cff8e (diff) | |
| download | bcm5719-llvm-e9a153f4145d6f78f1f1cd0b6205319f236e5fa4.tar.gz bcm5719-llvm-e9a153f4145d6f78f1f1cd0b6205319f236e5fa4.zip | |
[InstCombine] add unsigned saturation subtraction canonicalizations
This is the instcombine part of unsigned saturation canonicalization.
Backend patches already commited:
https://reviews.llvm.org/D37510
https://reviews.llvm.org/D37534
It converts unsigned saturated subtraction patterns to forms recognized
by the backend:
(a > b) ? a - b : 0 -> ((a > b) ? a : b) - b)
(b < a) ? a - b : 0 -> ((a > b) ? a : b) - b)
(b > a) ? 0 : a - b -> ((a > b) ? a : b) - b)
(a < b) ? 0 : a - b -> ((a > b) ? a : b) - b)
((a > b) ? b - a : 0) -> - ((a > b) ? a : b) - b)
((b < a) ? b - a : 0) -> - ((a > b) ? a : b) - b)
((b > a) ? 0 : b - a) -> - ((a > b) ? a : b) - b)
((a < b) ? 0 : b - a) -> - ((a > b) ? a : b) - b)
Patch by Yulia Koval!
Differential Revision: https://reviews.llvm.org/D41480
llvm-svn: 324255
Diffstat (limited to 'lldb/unittests/ObjectFile')
0 files changed, 0 insertions, 0 deletions
