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| author | James Molloy <james.molloy@arm.com> | 2016-09-09 12:52:24 +0000 |
|---|---|---|
| committer | James Molloy <james.molloy@arm.com> | 2016-09-09 12:52:24 +0000 |
| commit | 5349cafffb46c7a71fa6c695cc8aab32e048b555 (patch) | |
| tree | fce4cb60e4d380c3df949ca48fb7da57b09955f1 /test/CodeGen/ARM/select_xform.ll | |
| parent | 3c6f3f0961d2722354ac4b3da3f00d14cf6aa92c (diff) | |
[Thumb] Select (CMPZ X, -C) -> (CMPZ (ADDS X, C), 0)
The CMPZ #0 disappears during peepholing, leaving just a tADDi3, tADDi8 or t2ADDri. This avoids having to materialize the expensive negative constant in Thumb-1, and allows a shrinking from a 32-bit CMN to a 16-bit ADDS in Thumb-2.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@281040 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/ARM/select_xform.ll')
| -rw-r--r-- | test/CodeGen/ARM/select_xform.ll | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/test/CodeGen/ARM/select_xform.ll b/test/CodeGen/ARM/select_xform.ll index 460ca8f1840..8c1502e1465 100644 --- a/test/CodeGen/ARM/select_xform.ll +++ b/test/CodeGen/ARM/select_xform.ll @@ -280,7 +280,7 @@ entry: ; ARM: and r0, {{r[0-9]+}}, {{r[0-9]+}} ; T2-LABEL: t18: -; T2: and.w r0, {{r[0-9]+}} +; T2: and{{s|.w}} r0, {{r[0-9]+}} %cmp = icmp ne i32 %x, 0 %cond = select i1 %cmp, i32 5, i32 2 %cmp1 = icmp ne i32 %x, -1 |