diff options
Diffstat (limited to 'test/Transforms/InstCombine/bitcount.ll')
| -rw-r--r-- | test/Transforms/InstCombine/bitcount.ll | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/bitcount.ll b/test/Transforms/InstCombine/bitcount.ll new file mode 100644 index 0000000..da53920 --- /dev/null +++ b/test/Transforms/InstCombine/bitcount.ll @@ -0,0 +1,17 @@ +; Tests to make sure bit counts of constants are folded +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {ret i32 19} +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | \ +; RUN: grep -v declare | 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 = call i32 @llvm.ctpop.i31(i31 12415124) + %c2 = call i32 @llvm.cttz.i32(i32 87359874) + %c3 = call i32 @llvm.ctlz.i33(i33 87359874) + %r1 = add i32 %c1, %c2 + %r2 = add i32 %r1, %c3 + ret i32 %r2 +} |