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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 | 5337f20c1516296edcea6bc3da6cdc74329142ae (patch) | |
| tree | b344d60db4184b58df32d4eac9a14c511f07601c /lib/Transforms/Utils/Utils.cpp | |
| parent | 67e0c212c25f478e4c2ac6c8e9c50cce028fb79c (diff) | |
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
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122248 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Utils/Utils.cpp')
0 files changed, 0 insertions, 0 deletions