Andreas Krebbel via Gcc-patches writes:
> On 1/14/22 20:41, Andreas Krebbel via Gcc-patches wrote:
>> On 1/14/22 08:37, Richard Biener wrote:
>> ...
>>> Can the gist of this bug be put into the GCC bugzilla so the rev can
>>> refer to it?
>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104034
>>
On 1/14/22 20:41, Andreas Krebbel via Gcc-patches wrote:
> On 1/14/22 08:37, Richard Biener wrote:
> ...
>> Can the gist of this bug be put into the GCC bugzilla so the rev can
>> refer to it?
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104034
>
>> Can we have a testcase even?
> The testcase
On Fri, Jan 14, 2022 at 11:42 AM Andreas Krebbel via Gcc-patches
wrote:
>
> On 1/14/22 08:37, Richard Biener wrote:
> ...
> > Can the gist of this bug be put into the GCC bugzilla so the rev can
> > refer to it?
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104034
>
> > Can we have a testcase
On 1/14/22 08:37, Richard Biener wrote:
...
> Can the gist of this bug be put into the GCC bugzilla so the rev can
> refer to it?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104034
> Can we have a testcase even?
The testcase from Jakub is in the BZ. However, since it doesn't fail with head
I
On Thu, Jan 13, 2022 at 6:12 PM Andreas Krebbel via Gcc-patches
wrote:
>
> The cprop_hardreg pass is built around the assumption that accessing a
> register in a narrower mode is the same as accessing the lowpart of
> the register. This unfortunately is not true for vector registers on
> IBM Z.
On 1/13/22 18:11, Andreas Krebbel via Gcc-patches wrote:
...
> @@ -5949,7 +5959,7 @@ register if floating point arithmetic is not being
> done. As long as the\n\
> floating registers are not in class @code{GENERAL_REGS}, they will not\n\
> be used unless some pattern's constraint asks for
The cprop_hardreg pass is built around the assumption that accessing a
register in a narrower mode is the same as accessing the lowpart of
the register. This unfortunately is not true for vector registers on
IBM Z. This caused a miscompile of LLVM with GCC 8.5. The problem
could not be reproduced
