This patch fixes multiple ICEs in full coverage testing:
cc1: internal compiler error: in riscv_legitimize_poly_move, at
config/riscv/riscv.cc:2456^M
0x1fd8d78 riscv_legitimize_poly_move^M
../../../../gcc/gcc/config/riscv/riscv.cc:2456^M
0x1fd9518 riscv_legitimize_move(machine_mode, rtx_def*, rtx_def*)^M
../../../../gcc/gcc/config/riscv/riscv.cc:2583^M
0x2936820 gen_movdi(rtx_def*, rtx_def*)^M
../../../../gcc/gcc/config/riscv/riscv.md:2099^M
0x11a0f28 rtx_insn* insn_gen_fn::operator()<rtx_def*, rtx_def*>(rtx_def*,
rtx_def*) const^M
../../../../gcc/gcc/recog.h:431^M
0x13cf2f9 emit_move_insn_1(rtx_def*, rtx_def*)^M
../../../../gcc/gcc/expr.cc:4553^M
0x13d010c emit_move_insn(rtx_def*, rtx_def*)^M
../../../../gcc/gcc/expr.cc:4723^M
0x216f5e0 run_poly_int_selftest^M
../../../../gcc/gcc/config/riscv/riscv-selftests.cc:185^M
0x21701e6 run_poly_int_selftests^M
../../../../gcc/gcc/config/riscv/riscv-selftests.cc:226^M
0x2172109 selftest::riscv_run_selftests()^M
../../../../gcc/gcc/config/riscv/riscv-selftests.cc:371^M
0x3b8067b selftest::run_tests()^M
../../../../gcc/gcc/selftest-run-tests.cc:112^M
0x1ad90ee toplev::run_self_tests()^M
../../../../gcc/gcc/toplev.cc:2209^M
Running target
riscv-sim/-march=rv64gcv/-mabi=lp64d/-mcmodel=medlow/--param=riscv-autovec-lmul=m1/--param=riscv-autovec-preference=fixed-vlmax
The rootcause is that we are testing POLY value computation during FIXED-VLMAX
and ICE in this code:
if (BYTES_PER_RISCV_VECTOR.is_constant ())
{
gcc_assert (value.is_constant ()); ----->
assert failed.
riscv_emit_move (dest, GEN_INT (value.to_constant ()));
return;
}
For example, a poly value [15, 16] is computed by csrr vlen + multiple scalar
integer instructions.
However, such compile-time unknown value need to be computed when it is
scalable vector, that is !BYTES_PER_RISCV_VECTOR.is_constant (),
since csrr vlenb = [16, 0] when -march=rv64gcv
--param=riscv-autovec-preference=fixed-vlmax and we have no chance to compute
compile-time POLY value.
Also, we never reach the situation to compute a compile time unknown value when
it is FIXED-VLMAX vector. So disable POLY selftest for FIXED-VLMAX.
gcc/ChangeLog:
* config/riscv/riscv-selftests.cc (riscv_run_selftests): Remove poly
self test when FIXED-VLMAX.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/base/poly-selftest-1.c: New test.
---
gcc/config/riscv/riscv-selftests.cc | 14 +++++++++++++-
.../gcc.target/riscv/rvv/base/poly-selftest-1.c | 12 ++++++++++++
2 files changed, 25 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/poly-selftest-1.c
diff --git a/gcc/config/riscv/riscv-selftests.cc
b/gcc/config/riscv/riscv-selftests.cc
index 0ac17fb70a1..289916b999e 100644
--- a/gcc/config/riscv/riscv-selftests.cc
+++ b/gcc/config/riscv/riscv-selftests.cc
@@ -368,7 +368,19 @@ namespace selftest {
void
riscv_run_selftests (void)
{
- run_poly_int_selftests ();
+ if (!BYTES_PER_RISCV_VECTOR.is_constant ())
+ /* We can know POLY value = [4, 4] when BYTES_PER_RISCV_VECTOR
+ is !is_constant () since we can use csrr vlenb and scalar shift
+ instruction to compute such POLY value and store it into a scalar
+ register. Wheras, we can't know [4, 4] on it is specified as
+ FIXED-VLMAX since BYTES_PER_RISCV_VECTOR = 16 for -march=rv64gcv
+ and csrr vlenb is 16 which is totally unrelated to any
+ compile-time unknown POLY value.
+
+ Since we never need to compute a compile-time unknown POLY value
+ when --param=riscv-autovec-preference=fixed-vlmax, disable poly
+ selftests in such situation. */
+ run_poly_int_selftests ();
run_const_vector_selftests ();
run_broadcast_selftests ();
}
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/poly-selftest-1.c
b/gcc/testsuite/gcc.target/riscv/rvv/base/poly-selftest-1.c
new file mode 100644
index 00000000000..0f128ac26b2
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/base/poly-selftest-1.c
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d -O0 -fself-test=$srcdir/selftests
--param=riscv-autovec-preference=fixed-vlmax -S" } */
+
+/* Verify that -fself-test does not fail on a non empty source. */
+
+int i;
void bar();
void foo()
+{
+ while (i--)
+ bar();
+}
+
+/* { dg-regexp {^-fself-test: [0-9]+ pass\(es\) in [.0-9]+ seconds$|.*: note:
self-tests are not enabled in this build$} } */
--
2.36.3
