https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108264
Bug ID: 108264
Summary: [11/12/13 Regression] ICE compiling guacamole-server
on s390x-linux
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
Target Milestone: ---
int v;
extern int bar (void);
static inline void
foo (char *d)
{
switch (bar ())
{
case 2:
d[0] = d[1] = d[2] = d[3] = v;
break;
case 4:
d[0] = 0;
}
}
int
baz (int x)
{
foo ((char *) &x);
return x;
}
ICEs with -O2 -march=z13 -fpic (in 11 with -O2 -ftree-vectorize -march=z13
-fpic) in:
during RTL pass: expand
dump file: guacamole-ice.i.254r.expand
In function ‘foo’,
inlined from ‘baz’ at guacamole-ice.i:20:3:
guacamole-ice.i:10:12: internal compiler error: in convert_move, at expr.cc:297
10 | d[0] = d[1] = d[2] = d[3] = v;
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
This is when expanding
_2 = {_6, _6, _6, _6};
MEM <vector(4) char> [(char *)&x] = _2;
where
vector(4) char _2;
and x is int PARM_DECL.
to in convert_move is (reg/v:DI 66 [ x+-4 ]) and from is (reg:V4QI 70) , so the
modes have different sizes. But x is actually int and so the DImode is
argument promotion.
