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| author | Segher Boessenkool <segher@kernel.crashing.org> | 2016-11-23 15:33:13 +0100 |
|---|---|---|
| committer | Segher Boessenkool <segher@gcc.gnu.org> | 2016-11-23 15:33:13 +0100 |
| commit | 712871dde1fb2d29b4f742fababb645cd3b1dbbe (patch) | |
| tree | 35a38cefb14ddb97781f6cba2e1483e9cc17ac3c /gcc/fortran/f95-lang.c | |
| parent | 33951763a85087927068d553be6709cd03953a09 (diff) | |
| download | gcc-712871dde1fb2d29b4f742fababb645cd3b1dbbe.zip gcc-712871dde1fb2d29b4f742fababb645cd3b1dbbe.tar.gz gcc-712871dde1fb2d29b4f742fababb645cd3b1dbbe.tar.bz2 | |
combine: Convert subreg-of-lshiftrt to zero_extract properly (PR78390)
r242414, for PR77881, introduces some bugs (PR78390, PR78438, PR78477).
It all has the same root cause: that patch makes combine convert every
lowpart subreg of a logical shift right to a zero_extract. This cannot
work at all if it is not a constant shift, and it has to be a bit more
careful exactly which bits it extracts.
PR target/77881
PR bootstrap/78390
PR target/78438
PR bootstrap/78477
* combine.c (make_compound_operation_int): Do not convert a subreg of
a non-constant logical shift right to a zero_extract. Handle the case
where some zero bits have been shifted into the range covered by that
subreg.
From-SVN: r242757
Diffstat (limited to 'gcc/fortran/f95-lang.c')
0 files changed, 0 insertions, 0 deletions