[PATCH] RISC-V: Fix vsetvl pass ICE

[Lehua Ding]

This patch fix pr111234 (a vsetvl pass ICE) when fuse a mask any
vlmax vsetvl_vtype_change_only insn with a mu vsetvl insn.

        PR target/111234

gcc/ChangeLog:

        * config/riscv/riscv-vsetvl.cc (gen_vsetvl_pat): Remove condition.

gcc/testsuite/ChangeLog:

        * gcc.target/riscv/rvv/vsetvl/pr111234.c: New test.

---
 gcc/config/riscv/riscv-vsetvl.cc              |  2 +-
 .../gcc.target/riscv/rvv/vsetvl/pr111234.c    | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.target/riscv/rvv/vsetvl/pr111234.c

diff --git a/gcc/config/riscv/riscv-vsetvl.cc b/gcc/config/riscv/riscv-vsetvl.cc
index 1386d9250ca..a81bb53a521 100644
--- a/gcc/config/riscv/riscv-vsetvl.cc
+++ b/gcc/config/riscv/riscv-vsetvl.cc
@@ -655,7 +655,7 @@ gen_vsetvl_pat (rtx_insn *rinsn, const vector_insn_info 
&info,
     new_pat = gen_vsetvl_pat (VSETVL_NORMAL, new_info, vl);
   else
     {
-      if (vsetvl_insn_p (rinsn) || vlmax_avl_p (info.get_avl ()))
+      if (vsetvl_insn_p (rinsn))
        new_pat = gen_vsetvl_pat (VSETVL_NORMAL, new_info, get_vl (rinsn));
       else if (INSN_CODE (rinsn) == CODE_FOR_vsetvl_vtype_change_only)
        new_pat = gen_vsetvl_pat (VSETVL_VTYPE_CHANGE_ONLY, new_info, NULL_RTX);
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/vsetvl/pr111234.c 
b/gcc/testsuite/gcc.target/riscv/rvv/vsetvl/pr111234.c
new file mode 100644
index 00000000000..ee5eec4a257
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/rvv/vsetvl/pr111234.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-options "-march=rv64gcv -mabi=lp64d -O3" } */
+
+#include <riscv_vector.h>
+
+void
+f (vint32m1_t *in, vint64m2_t *out, vbool32_t *m, int b)
+{
+  vint32m1_t va = *in;
+  vbool32_t mask = *m;
+  vint64m2_t vb
+    = __riscv_vwadd_vx_i64m2_m (mask, va, 1, __riscv_vsetvlmax_e64m2 ());
+  vint64m2_t vc = __riscv_vadd_vx_i64m2 (vb, 1, __riscv_vsetvlmax_e64m2 ());
+
+  if (b != 0)
+    vc = __riscv_vadd_vx_i64m2_mu (mask, vc, vc, 1, __riscv_vsetvlmax_e64m2 
());
+
+  *out = vc;
+}
-- 
2.36.3