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author | Bill Wendling <isanbard@gmail.com> | 2008-11-30 13:08:13 +0000 |
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committer | Bill Wendling <isanbard@gmail.com> | 2008-11-30 13:08:13 +0000 |
commit | 7f0ef6b325d0f6061c584ab93ebb083b87bca4ff (patch) | |
tree | fdce24fc331229e1683b504ac65d4b91b6d04172 /test | |
parent | 7c7048ecc688d57d10689009719dc2513a03250e (diff) | |
download | external_llvm-7f0ef6b325d0f6061c584ab93ebb083b87bca4ff.zip external_llvm-7f0ef6b325d0f6061c584ab93ebb083b87bca4ff.tar.gz external_llvm-7f0ef6b325d0f6061c584ab93ebb083b87bca4ff.tar.bz2 |
Implement (A&((~A)|B)) -> A&B transformation in the instruction combiner. This
takes care of all permutations of this pattern.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60290 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
-rw-r--r-- | test/Transforms/InstCombine/and-not-or.ll | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/and-not-or.ll b/test/Transforms/InstCombine/and-not-or.ll new file mode 100644 index 0000000..b183b21 --- /dev/null +++ b/test/Transforms/InstCombine/and-not-or.ll @@ -0,0 +1,36 @@ +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {and i32 %y, %x} | count 2 +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {and i32 %x, %y} | count 2 +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep {xor} +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep {or} + +define i32 @func1(i32 %x, i32 %y) nounwind { +entry: + %n = xor i32 %y, -1 + %o = or i32 %n, %x + %a = and i32 %o, %y + ret i32 %a +} + +define i32 @func2(i32 %x, i32 %y) nounwind { +entry: + %n = xor i32 %y, -1 + %o = or i32 %x, %n + %a = and i32 %o, %y + ret i32 %a +} + +define i32 @func3(i32 %x, i32 %y) nounwind { +entry: + %n = xor i32 %y, -1 + %o = or i32 %n, %x + %a = and i32 %y, %o + ret i32 %a +} + +define i32 @func4(i32 %x, i32 %y) nounwind { +entry: + %n = xor i32 %y, -1 + %o = or i32 %x, %n + %a = and i32 %y, %o + ret i32 %a +} |