Re: [PATCH] rs6000: MMA test case emits wrong code when building a vector pair

2021-11-16 Thread Peter Bergner via Gcc-patches
On 11/13/21 7:25 AM, Segher Boessenkool wrote: > On Wed, Oct 27, 2021 at 08:37:57PM -0500, Peter Bergner wrote: >> PR102976 shows a test case where we generate wrong code when building >> a vector pair from 2 vector registers. The bug here is that with unlucky >> register assignments, we can clobb

Re: [PATCH] rs6000: MMA test case emits wrong code when building a vector pair

2021-11-13 Thread Segher Boessenkool
On Wed, Oct 27, 2021 at 08:37:57PM -0500, Peter Bergner wrote: > PR102976 shows a test case where we generate wrong code when building > a vector pair from 2 vector registers. The bug here is that with unlucky > register assignments, we can clobber one of the input operands before > we write both