[PATCH] RISC-V: Imply zicsr for svade and svadu extensions.

[Dongyan Chen]

This patch implies zicsr for svade and svadu extensions.
According to the riscv-privileged spec, the svade and svadu extensions
are privileged instructions, so they should imply zicsr.

gcc/ChangeLog:

        * config/riscv/riscv-ext.def: Imply zicsr.

---
 gcc/config/riscv/riscv-ext.def | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/config/riscv/riscv-ext.def b/gcc/config/riscv/riscv-ext.def
index dbda8ded3974..2e3c21660184 100644
--- a/gcc/config/riscv/riscv-ext.def
+++ b/gcc/config/riscv/riscv-ext.def
@@ -1915,7 +1915,7 @@ DEFINE_RISCV_EXT(
   /* FULL_NAME */ "Hardware Updating of A/D Bits extension",
   /* DESC */ "",
   /* URL */ ,
-  /* DEP_EXTS */ ({}),
+  /* DEP_EXTS */ ({"zicsr"}),
   /* SUPPORTED_VERSIONS */ ({{1, 0}}),
   /* FLAG_GROUP */ sv,
   /* BITMASK_GROUP_ID */ BITMASK_NOT_YET_ALLOCATED,
@@ -1928,7 +1928,7 @@ DEFINE_RISCV_EXT(
   /* FULL_NAME */ "Cause exception when hardware updating of A/D bits is 
disabled",
   /* DESC */ "",
   /* URL */ ,
-  /* DEP_EXTS */ ({}),
+  /* DEP_EXTS */ ({"zicsr"}),
   /* SUPPORTED_VERSIONS */ ({{1, 0}}),
   /* FLAG_GROUP */ sv,
   /* BITMASK_GROUP_ID */ BITMASK_NOT_YET_ALLOCATED,
--
2.43.0