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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2010-12-20 16:18:51 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2010-12-20 16:18:51 +0000 |
| commit | 68531baea926431ba4a4a94d12c99db2b444845f (patch) | |
| tree | 105ee5a0d0e0bda65a82b6c65d4e0bdb0da79a14 /llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp | |
| parent | ca2511d8497c1e99b29f1c7cefa736a893cb788c (diff) | |
| download | bcm5719-llvm-68531baea926431ba4a4a94d12c99db2b444845f.tar.gz bcm5719-llvm-68531baea926431ba4a4a94d12c99db2b444845f.zip | |
Teach InstCombine to merge (icmp ult (X + CA), C1) | (icmp eq X, C2) into (icmp ult (X + CA), C1 + 1) if C2 + CA == C1.
InstCombine creates these so now we compile x == 23 || x == 24 || x == 25 to
%x.off = add i32 %x, -23
%1 = icmp ult i32 %x.off, 3
instead of
%x.off = add i32 %x, -23
%1 = icmp ult i32 %x.off, 2
%cmp3 = icmp eq i32 %x, 25
%ret2 = or i1 %1, %cmp3
llvm-svn: 122248
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp')
0 files changed, 0 insertions, 0 deletions
