diff options
| author | Sanjoy Das <sanjoy@playingwithpointers.com> | 2015-09-18 21:21:02 +0000 |
|---|---|---|
| committer | Sanjoy Das <sanjoy@playingwithpointers.com> | 2015-09-18 21:21:02 +0000 |
| commit | f69d0e3384e19fb74556bcb1b9c3919a01474440 (patch) | |
| tree | 31d0e6e240ba9a05d350f6eda61336bdbc5bf9e2 /clang/lib/Basic/Targets.cpp | |
| parent | e8d1c59756d93e0d9ad95ccaa984a50b54e9ece7 (diff) | |
| download | bcm5719-llvm-f69d0e3384e19fb74556bcb1b9c3919a01474440.tar.gz bcm5719-llvm-f69d0e3384e19fb74556bcb1b9c3919a01474440.zip | |
[IndVars] Widen more comparisons for non-negative induction vars
Summary:
If an induction variable is provably non-negative, its sign extension is
equal to its zero extension. This means narrow uses like
icmp slt iNarrow %indvar, %rhs
can be widened into
icmp slt iWide zext(%indvar), sext(%rhs)
Reviewers: atrick, mcrosier, hfinkel
Subscribers: hfinkel, reames, llvm-commits
Differential Revision: http://reviews.llvm.org/D12745
llvm-svn: 248045
Diffstat (limited to 'clang/lib/Basic/Targets.cpp')
0 files changed, 0 insertions, 0 deletions
