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| author | Reid Spencer <rspencer@reidspencer.com> | 2007-04-02 01:45:31 +0000 |
|---|---|---|
| committer | Reid Spencer <rspencer@reidspencer.com> | 2007-04-02 01:45:31 +0000 |
| commit | f1b18a7bdbc566999eedc8c0c6d748e0e69cb4b3 (patch) | |
| tree | 8d7e66011f33fc334af18eebf41c6514aeece868 /test | |
| parent | c9951231822215d6aea7a9b50947c18d8d745609 (diff) | |
| download | external_llvm-f1b18a7bdbc566999eedc8c0c6d748e0e69cb4b3.zip external_llvm-f1b18a7bdbc566999eedc8c0c6d748e0e69cb4b3.tar.gz external_llvm-f1b18a7bdbc566999eedc8c0c6d748e0e69cb4b3.tar.bz2 | |
Add a test case to make sure that constant folding of the bit counting
intrinsics works.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35577 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/InstCombine/bitcount.ll | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/bitcount.ll b/test/Transforms/InstCombine/bitcount.ll new file mode 100644 index 0000000..bb85110 --- /dev/null +++ b/test/Transforms/InstCombine/bitcount.ll @@ -0,0 +1,16 @@ +; Tests to make sure bit counts of constants are folded +; RUN: llvm-as < %s | opt -instcombine | llvm-dis -o /dev/null -f && +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep 'llvm.ct' + +declare i32 @llvm.ctpop.i31(i31 %val) +declare i32 @llvm.cttz.i32(i32 %val) +declare i32 @llvm.ctlz.i33(i33 %val) + +define i32 %test(i32 %A) { + %c1 = i32 call @llvm.ctpop(i31 12415124) + %c2 = i32 call @llvm.cttz(i32 87359874) + %c3 = i32 call @llvm.ctlz(i33 87359874) + %r1 = add i32 %c1, %c2 + %r2 = add i32 %r1, %c3 + ret i32 %r2 +} |