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| author |   Chen Qi <Qi.Chen@windriver.com> | 2017-10-27 17:43:51 +0800 |
|---|---|---|
| committer |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2017-11-08 22:23:45 +0000 |
| commit | 3717c76eb24217c14a22f72fdd8732923729dee8 (patch) | |
| tree | dcb1fe5500c1fbd4f4ddc6e5eaa5a50cc2a9fe14 /meta/recipes-devtools/gcc/gcc-7.2/fix-miscompilation-for-O1-on-mips64el.patch | |
| parent | acdee728f0f6358dda709304ec307d737124aee6 (diff) | |
| download | openembedded-core-contrib-3717c76eb24217c14a22f72fdd8732923729dee8.tar.gz | |
gcc: fix miscompilation on mips64
We've observed strange behaviour of `systemctl status <xxx> on qemumips64.
The output of the command is like `systemctl show <xxx>', which is incorrect.
This patch is from gcc bugzilla's attachment.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81803
The patch hasn't been merged into gcc. But it does solve the above problem.
Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Diffstat (limited to 'meta/recipes-devtools/gcc/gcc-7.2/fix-miscompilation-for-O1-on-mips64el.patch')
| -rw-r--r-- | meta/recipes-devtools/gcc/gcc-7.2/fix-miscompilation-for-O1-on-mips64el.patch | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/meta/recipes-devtools/gcc/gcc-7.2/fix-miscompilation-for-O1-on-mips64el.patch b/meta/recipes-devtools/gcc/gcc-7.2/fix-miscompilation-for-O1-on-mips64el.patch new file mode 100644 index 0000000000..28020b0e3b --- /dev/null +++ b/meta/recipes-devtools/gcc/gcc-7.2/fix-miscompilation-for-O1-on-mips64el.patch @@ -0,0 +1,35 @@ +This patch comes from https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81803 + +Author: mpf <mpf@138bc75d-0d04-0410-961f-82ee72b054a4> + +This patch hasn't been merged into gcc. But it does solve the problem of +strange behaviour of `systemd status <xxx>' on qemumips64. + +Upstream-Status: Pending [Taken from gcc bugzilla's attachment] + +Signed-off-by: Chen Qi <Qi.Chen@windriver.com> +--- + gcc/lra-constraints.c | 7 ++++++- + 1 file changed, 6 insertions(+), 1 deletion(-) + +diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c +index c8bc9b9a66f..6d319662b09 100644 +--- a/gcc/lra-constraints.c ++++ b/gcc/lra-constraints.c +@@ -4235,7 +4235,12 @@ curr_insn_transform (bool check_only_p) + && (goal_alt[i] == NO_REGS + || (simplify_subreg_regno + (ira_class_hard_regs[goal_alt[i]][0], +- GET_MODE (reg), byte, mode) >= 0))))) ++ GET_MODE (reg), byte, mode) >= 0)))) ++ || (type != OP_IN ++ && GET_MODE_PRECISION (mode) ++ < GET_MODE_PRECISION (GET_MODE (reg)) ++ && GET_MODE_SIZE (GET_MODE (reg)) <= UNITS_PER_WORD ++ && WORD_REGISTER_OPERATIONS)) + { + /* An OP_INOUT is required when reloading a subreg of a + mode wider than a word to ensure that data beyond the +-- +2.13.0 + |