https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80376
Bug ID: 80376
Summary: Some vec_xxpermdi usage lead to ICE
Product: gcc
Version: 6.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: lu_zero at gentoo dot org
Target Milestone: ---
Testcase:
#include <altivec.h>
#include <stdio.h>
int main(void) {
vector unsigned int a = { 1, 2, 3, 4 };
vector unsigned int b = { -1, -2, -3, -4 };
unsigned int c[4], i, j;
for (j = 0; j < 4; j++) {
printf("%d -> ", j);
vec_vsx_st(vec_xxpermdi(a, b, j), 0, c);
for (i = 0; i < 4; i++) {
printf("%d ", c[i]);
}
printf("\n");
}
return 0;
}
compiler log:
/tmp/t.c: In function ‘main’:
/tmp/t.c:12:5: internal compiler error: in copy_to_mode_reg, at explow.c:601
vec_vsx_st(vec_xxpermdi(a, b, j), 0, c);
^~~~~~~~~~
0x103b737f copy_to_mode_reg(machine_mode, rtx_def*)
../../src/gcc/explow.c:601
0x10a0ae0f rs6000_expand_ternop_builtin
../../src/gcc/config/rs6000/rs6000.c:14234
0x10a0ae0f rs6000_expand_builtin
../../src/gcc/config/rs6000/rs6000.c:15658
0x1028cf9f expand_builtin(tree_node*, rtx_def*, rtx_def*, machine_mode, int)
../../src/gcc/builtins.c:5624
0x103d12ff expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
../../src/gcc/expr.c:10598
0x103dc017 store_expr_with_bounds(tree_node*, rtx_def*, int, bool, bool,
tree_node*)
../../src/gcc/expr.c:5406
0x103dd3cb expand_assignment(tree_node*, tree_node*, bool)
../../src/gcc/expr.c:5175
0x102aec73 expand_call_stmt
../../src/gcc/cfgexpand.c:2658
0x102aec73 expand_gimple_stmt_1
../../src/gcc/cfgexpand.c:3548
0x102aec73 expand_gimple_stmt
../../src/gcc/cfgexpand.c:3714
0x102b1937 expand_gimple_basic_block
../../src/gcc/cfgexpand.c:5720
0x102b6f87 execute
../../src/gcc/cfgexpand.c:6335
