https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91181
Bug ID: 91181
Summary: Failing as_as type conversion in vect_build_slp_tree_1
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: jamborm at gcc dot gnu.org
CC: rguenth at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux
Target: x86_64-linux
When compiling C snippet:
enum { a, b, c };
float *d, *e;
f, g, h, i;
j() {
float a;
for (; h; h++) {
i = h * 4;
a = d[i + b];
if (a) {
e[i + b] = g < d[i + b] * f * a ? g : d[i + b] * f * a;
e[i + c] = g < d[i + c] * f * a ? g : d[i + c] * f * a;
}
e[i + b] = e[i + c];
}
}
with -Ofast -march=sandybridge test.c (march can be also znver1, for
example) and trunk revision 273492, I get:
$ ~/gcc/trunk/inst/bin/gcc -Ofast -w -march=sandybridge test.c
during GIMPLE pass: vect
test.c: In function ‘j’:
test.c:4:1: internal compiler error: in as_a, at is-a.h:197
4 | j() {
| ^
0x110afb6 gcall* as_a<gcall*, gimple>(gimple*)
/home/mjambor/gcc/trunk/src/gcc/is-a.h:197
0x110afb6 vect_build_slp_tree_1
/home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:862
0x110d96c vect_build_slp_tree_2
/home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:1161
0x110d4e8 vect_build_slp_tree
/home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:1073
0x110dc47 vect_build_slp_tree_2
/home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:1219
0x110d4e8 vect_build_slp_tree
/home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:1073
0x110dc47 vect_build_slp_tree_2
/home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:1219
0x110d4e8 vect_build_slp_tree
/home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:1073
0x110dc47 vect_build_slp_tree_2
/home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:1219
0x110d4e8 vect_build_slp_tree
/home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:1073
0x110dc47 vect_build_slp_tree_2
/home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:1219
0x110d4e8 vect_build_slp_tree
/home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:1073
0x110dc47 vect_build_slp_tree_2
/home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:1219
0x110d4e8 vect_build_slp_tree
/home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:1073
0x1111fd7 vect_analyze_slp_instance
/home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:1986
0x1112dc8 vect_analyze_slp(vec_info*, unsigned int)
/home/mjambor/gcc/trunk/src/gcc/tree-vect-slp.c:2187
0x10f7b44 vect_analyze_loop_2
/home/mjambor/gcc/trunk/src/gcc/tree-vect-loop.c:1985
0x10f8ff7 vect_analyze_loop(loop*, _loop_vec_info*, vec_info_shared*)
/home/mjambor/gcc/trunk/src/gcc/tree-vect-loop.c:2379
0x111a12a try_vectorize_loop_1
/home/mjambor/gcc/trunk/src/gcc/tree-vectorizer.c:887
0x111a71b try_vectorize_loop
/home/mjambor/gcc/trunk/src/gcc/tree-vectorizer.c:1033
The testcase was creduced from 526.blender_r from SPEC 2017.
