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| author | Dylan McKay <dylanmckay34@gmail.com> | 2016-12-31 01:07:14 +0000 |
|---|---|---|
| committer | Dylan McKay <dylanmckay34@gmail.com> | 2016-12-31 01:07:14 +0000 |
| commit | 97cf837b465e9e95fc31368f02ca20036811efba (patch) | |
| tree | f7f70e8cca69e94b5954d4ba35738fce169765d6 /llvm/lib/Target | |
| parent | f947f3914839eae86206cf09e79bd662bd179cc9 (diff) | |
| download | bcm5719-llvm-97cf837b465e9e95fc31368f02ca20036811efba.tar.gz bcm5719-llvm-97cf837b465e9e95fc31368f02ca20036811efba.zip | |
[AVR] Optimize 16-bit ANDs with '1'
Summary: Fixes PR 31345
Reviewers: dylanmckay
Subscribers: fhahn, llvm-commits
Differential Revision: https://reviews.llvm.org/D28186
llvm-svn: 290778
Diffstat (limited to 'llvm/lib/Target')
| -rw-r--r-- | llvm/lib/Target/AVR/AVRExpandPseudoInsts.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Target/AVR/AVRExpandPseudoInsts.cpp b/llvm/lib/Target/AVR/AVRExpandPseudoInsts.cpp index 65a58cd31c3..1b2f2cec0bc 100644 --- a/llvm/lib/Target/AVR/AVRExpandPseudoInsts.cpp +++ b/llvm/lib/Target/AVR/AVRExpandPseudoInsts.cpp @@ -203,6 +203,10 @@ expandLogic(unsigned Op, Block &MBB, BlockIt MBBI) { bool AVRExpandPseudo:: isLogicImmOpRedundant(unsigned Op, unsigned ImmVal) const { + // ANDI Rd, 0xff is redundant. + if (Op == AVR::ANDIRdK && ImmVal == 0xff) + return true; + // ORI Rd, 0x0 is redundant. if (Op == AVR::ORIRdK && ImmVal == 0x0) return true; |
