i386: Use a new temp slot kind for splitter to floatdi<mode>2_i387_with_xmm [PR104674]
As mentioned in the PR, the following testcase is miscompiled for similar
reasons as the already fixed PR78791 - we use SLOT_TEMP slots in various
places during expansion and during expansion we can guarantee that the
lifetime of those temporary slot doesn't overlap. But the following
splitter uses SLOT_TEMP too and in between expansion and split1 there is
a possibility that something extends the lifetime of SLOT_TEMP created
slots across an instruction that will be split by this splitter.
The following patch fixes it by using a new temp slot kind to make sure
it doesn't reuse a SLOT_TEMP that could be live across the instruction.
2022-02-25 Jakub Jelinek <jakub@redhat.com>
PR target/104674
* config/i386/i386.h (enum ix86_stack_slot): Add SLOT_FLOATxFDI_387.
* config/i386/i386.md (splitter to floatdi<mode>2_i387_with_xmm): Use
SLOT_FLOATxFDI_387 rather than SLOT_TEMP.
git://gcc.gnu.org / gcc.git / commit