Yes this problem was found with Christophe's neon intrinsic tests which are awaiting approval. The problem was found by passing a value of zero to the vclz vector intrinsic.

On 10/09/2014 12:11 AM, Andrew Pinski wrote:
On Thu, Oct 9, 2014 at 12:05 AM, Michael Collison
<michael.colli...@linaro.org> wrote:
The CLZ_DEFINED_VALUE_AT_ZERO macro is harded to return 32. For the vector
intrinsic vclz this is incorrect and should return the value eight. The
CTZ_DEFINED_VALUE_AT_ZERO has the same issue.

Do you have a testcase?  I almost think you should have a testcase
which causes the constant folding.  Though I don't think there is
constant folding of the vector clz/ctz happening.

Thanks,
Andrew

Tested on arm-linux-gnueabihf, arm-linux-gnueabi.

2014-10-08  Michael Collison  <michael.colli...@linaro.com>

     * config/arm/arm.h (CLZ_DEFINED_VALUE_AT_ZERO) : Update
     to support vector modes
     (CTZ_DEFINED_VALUE_AT_ZERO): Ditto

--
Michael Collison
Linaro Toolchain Working Group
michael.colli...@linaro.org


--
Michael Collison
Linaro Toolchain Working Group
michael.colli...@linaro.org

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