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| author | Martin Liska <mliska@suse.cz> | 2022-05-16 10:36:49 +0200 |
|---|---|---|
| committer | Martin Liska <mliska@suse.cz> | 2022-05-24 13:26:47 +0200 |
| commit | c5c523723149112d117a6d3b259dfd95b032a545 (patch) | |
| tree | afaca4f3b75924c720fbbe685b9b4a6ea9383e5b | |
| parent | 3677eb80b683cead7db972bc206fd2e75d997bd2 (diff) | |
| download | gcc-c5c523723149112d117a6d3b259dfd95b032a545.zip gcc-c5c523723149112d117a6d3b259dfd95b032a545.tar.gz gcc-c5c523723149112d117a6d3b259dfd95b032a545.tar.bz2 | |
Mitigate -Wmaybe-uninitialized in expmed.cc.
It's the warning I see every time I build GCC:
In file included from /home/marxin/Programming/gcc/gcc/coretypes.h:478,
from /home/marxin/Programming/gcc/gcc/expmed.cc:26:
In function ‘poly_uint16 mode_to_bytes(machine_mode)’,
inlined from ‘typename if_nonpoly<typename T::measurement_type>::type GET_MODE_SIZE(const T&) [with T = scalar_int_mode]’ at /home/marxin/Programming/gcc/gcc/machmode.h:647:24,
inlined from ‘rtx_def* emit_store_flag_1(rtx, rtx_code, rtx, rtx, machine_mode, int, int, machine_mode)’ at /home/marxin/Programming/gcc/gcc/expmed.cc:5728:56:
/home/marxin/Programming/gcc/gcc/machmode.h:550:49: warning: ‘*(unsigned int*)((char*)&int_mode + offsetof(scalar_int_mode, scalar_int_mode::m_mode))’ may be used uninitialized [-Wmaybe-uninitialized]
550 | ? mode_size_inline (mode) : mode_size[mode]);
| ^~~~
/home/marxin/Programming/gcc/gcc/expmed.cc: In function ‘rtx_def* emit_store_flag_1(rtx, rtx_code, rtx, rtx, machine_mode, int, int, machine_mode)’:
/home/marxin/Programming/gcc/gcc/expmed.cc:5657:19: note: ‘*(unsigned int*)((char*)&int_mode + offsetof(scalar_int_mode, scalar_int_mode::m_mode))’ was declared here
5657 | scalar_int_mode int_mode;
| ^~~~~~~~
Can we please mitigate it?
gcc/ChangeLog:
* expmed.cc (emit_store_flag_1): Mitigate -Wmaybe-uninitialized
warning.
| -rw-r--r-- | gcc/expmed.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/expmed.cc b/gcc/expmed.cc index c3e4aa8..c890823 100644 --- a/gcc/expmed.cc +++ b/gcc/expmed.cc @@ -5658,7 +5658,7 @@ emit_store_flag_1 (rtx target, enum rtx_code code, rtx op0, rtx op1, /* If we are comparing a double-word integer with zero or -1, we can convert the comparison into one involving a single word. */ - scalar_int_mode int_mode; + scalar_int_mode int_mode = {}; if (is_int_mode (mode, &int_mode) && GET_MODE_BITSIZE (int_mode) == BITS_PER_WORD * 2 && (!MEM_P (op0) || ! MEM_VOLATILE_P (op0))) |