https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86624
Bug ID: 86624
Summary: [9 Regression] GCC failed to bootstrap
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: msebor at gcc dot gnu.org
Target Milestone: ---
Target: i686-pc-linux-gnu
On Linux/i686, r262910 caused:
In file included from /export/project/git/gcc-regression/gcc/gcc/system.h:691,
from
/export/project/git/gcc-regression/gcc/gcc/tree-vect-slp.c:23:
/export/project/git/gcc-regression/gcc/gcc/tree-vect-slp.c: In function
\u2018_slp_tree* vect_build_slp_tree_2(vec_info*, vec<gimple*>, unsigned int,
poly_uint64*, vec<_slp_tree*>*, bool*, unsigned int*, unsigned int*, unsigned
int)\u2019:
/export/project/git/gcc-regression/gcc/gcc/../include/libiberty.h:722:36:
error: \u2018alloca\u2019 bound is unknown [-Werror=alloca-larger-than=]
# define alloca(x) __builtin_alloca(x)
~~~~~~~~~~~~~~~~^~~
/export/project/git/gcc-regression/gcc/gcc/../include/libiberty.h:356:33: note:
in expansion of macro \u2018alloca\u2019
#define XALLOCAVEC(T, N) ((T *) alloca (sizeof (T) * (N)))
^~~~~~
/export/project/git/gcc-regression/gcc/gcc/tree-vect-slp.c:1437:16: note: in
expansion of macro \u2018XALLOCAVEC\u2019
bool *tem = XALLOCAVEC (bool, group_size);
^~~~~~~~~~
make[3]: *** [Makefile:1112: tree-vect-slp.o] Error 1
make[2]: *** [Makefile:4647: all-stage2-gcc] Error 2
make[1]: *** [Makefile:21362: stage2-bubble] Error 2
