| commit | 0e87eeb6ed1c907703d16b8a21ab16eed7b0e2df | |
| author | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | |
| Fri, 13 Oct 2017 09:58:23 +0000 (13 09:58 +0000) | ||
| committer | rsandifo <rsandifo@138bc75d-0d04-0410-961f-82ee72b054a4> | |
| Fri, 13 Oct 2017 09:58:23 +0000 (13 09:58 +0000) | ||
| tree | 00cfb30f3cf9eb032dc83d729b0f9afda961e1c7 | treesnapshot (tar.gz zip) |
| parent | 332d11bd6d121221dc6fc28a8cd8b07af38c385b | 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.
2017-10-13 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@253717 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.
2017-10-13 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@253717 138bc75d-0d04-0410-961f-82ee72b054a4
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| gcc/combine.c | diffblobblamehistory |