[PATCH] RISC-V: Fix NULL location pointer check in target attribute parser

[Jim Lin]

parse_arch tested "if (*m_loc)", dereferencing the location_t pointer,
while every other diagnostic site guards with "if (m_loc)".  Since
m_loc can be NULL, test the pointer instead of dereferencing it.

gcc/ChangeLog:

        * config/riscv/riscv-target-attr.cc
        (riscv_target_attr_parser::parse_arch): Check m_loc instead of
        *m_loc before emitting the diagnostic.

Signed-off-by: Jim Lin <j...@andestech.com>
---
 gcc/config/riscv/riscv-target-attr.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/riscv/riscv-target-attr.cc 
b/gcc/config/riscv/riscv-target-attr.cc
index 5f265d0b242..652e8d4a550 100644
--- a/gcc/config/riscv/riscv-target-attr.cc
+++ b/gcc/config/riscv/riscv-target-attr.cc
@@ -148,7 +148,7 @@ riscv_target_attr_parser::parse_arch (const char *str)
        {
          if (token[0] != '+')
            {
-             if (*m_loc)
+             if (m_loc)
                error_at (*m_loc, "unexpected arch for %<target()%> "
                          "attribute: must start with + or rv");
              goto fail;
-- 
2.52.0