| commit | 4f0eb67f3a453244ec1cdcc764ba2163fe31d2bd | |
| author | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | |
| Wed, 1 Nov 2017 08:54:22 +0000 (1 08:54 +0000) | ||
| committer | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | |
| Wed, 1 Nov 2017 08:54:22 +0000 (1 08:54 +0000) | ||
| tree | 15cc0b6bcadb90da797eecab3ad626c487496ade | treesnapshot (tar.gz zip) |
| parent | 20390c01ce84cbeabcf6929812c7c9e828925a78 | commitdiff |
Prevent invalid register mode changes in combine
This patch stops combine from changing the mode of an existing register
in-place if doing so would change the size of the underlying register
allocation size, as given by REGMODE_NATURAL_SIZE. Without this,
many tests fail in adjust_reg_mode after SVE is added. One example
is gcc.c-torture/compile/20090401-1.c.
2017-11-01 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* combine.c (can_change_dest_mode): Reject changes in
REGMODE_NATURAL_SIZE.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@254291 138bc75d-0d04-0410-961f-82ee72b054a4
This patch stops combine from changing the mode of an existing register
in-place if doing so would change the size of the underlying register
allocation size, as given by REGMODE_NATURAL_SIZE. Without this,
many tests fail in adjust_reg_mode after SVE is added. One example
is gcc.c-torture/compile/20090401-1.c.
2017-11-01 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* combine.c (can_change_dest_mode): Reject changes in
REGMODE_NATURAL_SIZE.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@254291 138bc75d-0d04-0410-961f-82ee72b054a4
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| gcc/combine.c | diffblobblamehistory |