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author | Nick Lewycky <nicholas@mxc.ca> | 2014-06-19 03:51:46 +0000 |
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committer | Nick Lewycky <nicholas@mxc.ca> | 2014-06-19 03:51:46 +0000 |
commit | fe3a219355b58428b93461c6c0517a9b90ebe962 (patch) | |
tree | 1bdd7434c6a722a9e3d0dc15ac3262557021feae /test | |
parent | 650b6ea893c118bf0c6e40cd3002954cc34df2bb (diff) | |
download | llvm-fe3a219355b58428b93461c6c0517a9b90ebe962.tar.gz llvm-fe3a219355b58428b93461c6c0517a9b90ebe962.tar.bz2 llvm-fe3a219355b58428b93461c6c0517a9b90ebe962.tar.xz |
Move optimization of some cases of (A & C1)|(B & C2) from instcombine to instsimplify. Patch by Rahul Jain, plus some last minute changes by me -- you can blame me for any bugs.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211252 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
-rw-r--r-- | test/Transforms/InstSimplify/apint-or.ll | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/test/Transforms/InstSimplify/apint-or.ll b/test/Transforms/InstSimplify/apint-or.ll new file mode 100644 index 0000000000..5d314db713 --- /dev/null +++ b/test/Transforms/InstSimplify/apint-or.ll @@ -0,0 +1,37 @@ +; RUN: opt < %s -instsimplify -S | not grep or + +; Test the case where integer BitWidth <= 64 && BitWidth % 2 != 0. +define i39 @test1(i39 %V, i39 %M) { + ;; If we have: ((V + N) & C1) | (V & C2) + ;; .. and C2 = ~C1 and C2 is 0+1+ and (N & C2) == 0 + ;; replace with V+N. + %C1 = xor i39 274877906943, -1 ;; C2 = 274877906943 + %N = and i39 %M, 274877906944 + %A = add i39 %V, %N + %B = and i39 %A, %C1 + %D = and i39 %V, 274877906943 + %R = or i39 %B, %D + ret i39 %R +; CHECK-LABEL @test1 +; CHECK-NEXT: and {{.*}}, -274877906944 +; CHECK-NEXT: add +; CHECK-NEXT: ret +} + +; Test the case where Integer BitWidth > 64 && BitWidth <= 1024. +define i399 @test2(i399 %V, i399 %M) { + ;; If we have: ((V + N) & C1) | (V & C2) + ;; .. and C2 = ~C1 and C2 is 0+1+ and (N & C2) == 0 + ;; replace with V+N. + %C1 = xor i399 274877906943, -1 ;; C2 = 274877906943 + %N = and i399 %M, 18446742974197923840 + %A = add i399 %V, %N + %B = and i399 %A, %C1 + %D = and i399 %V, 274877906943 + %R = or i399 %B, %D + ret i399 %R +; CHECK-LABEL @test2 +; CHECK-NEXT: and {{.*}}, 18446742974197923840 +; CHECK-NEXT: add +; CHECK-NEXT: ret +} |