https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101009
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |needs-bisection, wrong-code
Target Milestone|--- |12.0
Summary|wrong code with "-O3 |[12 Regression] wrong code
|-fno-tree-sra" |with "-O3 -fno-tree-sra"
Status|UNCONFIRMED |NEW
Last reconfirmed| |2021-06-10
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. loop distribution distributes
<bb 3> [local count: 955630225]:
# d.2_15 = PHI <_2(6), d.2_14(5)>
g[1].b = 2;
g[1].c = 1;
f.0_1 = f;
*f.0_1 = g[1];
g ={v} {CLOBBER};
_2 = d.2_15 + -1;
d = _2;
if (_2 != 0)
to
<bb 10> [local count: 955630225]:
# d.2_17 = PHI <_22(11), d.2_14(5)>
g[1].b = 2;
f.0_19 = f;
*f.0_19 = g[1];
_22 = d.2_17 + -1;
d = _22;
if (_22 != 0)
and
<bb 3> [local count: 955630225]:
# d.2_15 = PHI <_2(6), d.2_14(8)>
g[1].c = 1;
_2 = d.2_15 + -1;
if (_2 != 0)
doesn't seem to happen with the GCC 11 copy I have around.
