Committed, thanks juzhe.
--------------
Li Xu
>LGTM. Thanks for fixing it.
>
>
>
>juzhe.zh...@rivai.ai
>
>From: Li Xu
>Date: 2023-09-28 09:33
>To: gcc-patches
>CC: kito.cheng; palmer; juzhe.zhong; xuli
>Subject: [PATCH v2] RISC-V: Bugfix for RTL check[PR111533]
>From: xuli <xu...@eswincomputing.com>
>
>Consider the flowing situation:
>BB5: local_dem(RVV Insn 1, AVL(reg zero))
>RVV Insn 1: vmv.s.x, AVL (const_int 1)
>RVV Insn 2: vredsum.vs, AVL(reg zero)
>
>vmv.s.x has vl operand, the following code will get
>avl (cosnt_int) from RVV Insn 1.
>rtx avl = has_vl_op (insn->rtl ()) ? get_vl (insn->rtl ())
> : dem.get_avl ();
>
>If use REGNO for const_int, the compiler will crash:
>
>during RTL pass: vsetvl
>res_debug.c: In function '__dn_count_labels':
>res_debug.c:1050:1: internal compiler error: RTL check: expected code 'reg',
>have 'const_int' in rhs_regno, at rtl.h:1934
>1050 | }
> | ^
>0x8fb169 rtl_check_failed_code1(rtx_def const*, rtx_code, char const*, int,
>char const*)
>../.././gcc/gcc/rtl.cc:770
>0x1399818 rhs_regno(rtx_def const*)
>../.././gcc/gcc/rtl.h:1934
>0x1399818 anticipatable_occurrence_p
>../.././gcc/gcc/config/riscv/riscv-vsetvl.cc:348
>
>So in this case avl should be obtained from dem.
>
>Another issue is caused by the following code:
>HOST_WIDE_INT diff = INTVAL (builder.elt (i)) - i;
>
>during RTL pass: expand
>../../.././gcc/libgfortran/generated/matmul_c4.c: In function 'matmul_c4':
>../../.././gcc/libgfortran/generated/matmul_c4.c:2906:39: internal compiler
>error: RTL check:
>expected code 'const_int', have 'const_poly_int' in expand_const_vector,
>at config/riscv/riscv-v.cc:1149
>
>The builder.elt (i) can be either const_int or const_poly_int.
>
>PR target/111533
>
>gcc/ChangeLog:
>
>* config/riscv/riscv-v.cc (expand_const_vector): Fix bug.
>* config/riscv/riscv-vsetvl.cc (anticipatable_occurrence_p): Fix bug.
>
>gcc/testsuite/ChangeLog:
>
>* gcc.target/riscv/rvv/base/pr111533-1.c: New test.
>* gcc.target/riscv/rvv/base/pr111533-2.c: New test.
>---
>gcc/config/riscv/riscv-v.cc | 5 ++--
>gcc/config/riscv/riscv-vsetvl.cc | 3 +-
>.../gcc.target/riscv/rvv/base/pr111533-1.c | 15 ++++++++++
>.../gcc.target/riscv/rvv/base/pr111533-2.c | 29 +++++++++++++++++++
>4 files changed, 48 insertions(+), 4 deletions(-)
>create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/pr111533-1.c
>create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/base/pr111533-2.c
>
>diff --git a/gcc/config/riscv/riscv-v.cc b/gcc/config/riscv/riscv-v.cc
>index 359fb2ced8b..26700cfc732 100644
>--- a/gcc/config/riscv/riscv-v.cc
>+++ b/gcc/config/riscv/riscv-v.cc
>@@ -1149,8 +1149,9 @@ expand_const_vector (rtx target, rtx src)
> for (unsigned int i = 0; i < v.npatterns (); ++i)
>{
> /* Calculate the diff between the target sequence and
>- vid sequence. */
>- HOST_WIDE_INT diff = INTVAL (builder.elt (i)) - i;
>+ vid sequence. The elt (i) can be either const_int or
>+ const_poly_int. */
>+ poly_int64 diff = rtx_to_poly_int64 (builder.elt (i)) - i;
> v.quick_push (gen_int_mode (diff, v.inner_mode ()));
>}
> /* Step 2: Generate result = VID + diff. */
>diff --git a/gcc/config/riscv/riscv-vsetvl.cc
>b/gcc/config/riscv/riscv-vsetvl.cc
>index 7af33e7ea6f..af8c31d873c 100644
>--- a/gcc/config/riscv/riscv-vsetvl.cc
>+++ b/gcc/config/riscv/riscv-vsetvl.cc
>@@ -307,8 +307,7 @@ anticipatable_occurrence_p (const bb_info *bb, const
>vector_insn_info dem)
> if (dem.has_avl_reg ())
> {
> /* rs1 (avl) are not modified in the basic block prior to the VSETVL.
>*/
>- rtx avl
>- = has_vl_op (insn->rtl ()) ? get_vl (insn->rtl ()) : dem.get_avl ();
>+ rtx avl = dem.get_avl_or_vl_reg ();
> if (dem.dirty_p ())
>{
> gcc_assert (!vsetvl_insn_p (insn->rtl ()));
>diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/pr111533-1.c
>b/gcc/testsuite/gcc.target/riscv/rvv/base/pr111533-1.c
>new file mode 100644
>index 00000000000..aba26dfac89
>--- /dev/null
>+++ b/gcc/testsuite/gcc.target/riscv/rvv/base/pr111533-1.c
>@@ -0,0 +1,15 @@
>+/* { dg-do compile } */
>+/* { dg-options "-march=rv64gcv -mabi=lp64d -O2 -ffast-math -ftree-vectorize"
>} */
>+
>+#include <stddef.h>
>+
>+typedef _Complex float GFC_COMPLEX_4;
>+
>+void
>+test (GFC_COMPLEX_4 *a, GFC_COMPLEX_4 *b, GFC_COMPLEX_4 c, ptrdiff_t i,
>ptrdiff_t j)
>+{
>+ ptrdiff_t l;
>+ for (l = 0; l <= i; ++l)
>+ c += b[l] * a[j];
>+ b[j] = c;
>+}
>diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/pr111533-2.c
>b/gcc/testsuite/gcc.target/riscv/rvv/base/pr111533-2.c
>new file mode 100644
>index 00000000000..a4d2011b74b
>--- /dev/null
>+++ b/gcc/testsuite/gcc.target/riscv/rvv/base/pr111533-2.c
>@@ -0,0 +1,29 @@
>+/* { dg-do compile } */
>+/* { dg-options "-march=rv64gcv -mabi=lp64d -O2" } */
>+
>+#include <string.h>
>+
>+/* Return the number of DNS hierarchy levels in the name. */
>+int
>+test (const char *name) {
>+ int i, len, count;
>+
>+ len = strlen(name);
>+ for (i = 0, count = 0; i < len; i++) {
>+ /* XXX need to check for \. or use named's nlabels(). */
>+ if (name[i] == '.')
>+ count++;
>+ }
>+
>+ /* don't count initial wildcard */
>+ if (name[0] == '*')
>+ if (count)
>+ count--;
>+
>+ /* don't count the null label for root. */
>+ /* if terminating '.' not found, must adjust */
>+ /* count to include last label */
>+ if (len > 0 && name[len-1] != '.')
>+ count++;
>+ return (count);
>+}
>--
>2.17.1
>
>
