[gcc r12-1819] PR middle-end/101216 - spurious notes for function calls

[gcc r12-1819] PR middle-end/101216 - spurious notes for function calls

[Martin Sebor]

https://gcc.gnu.org/g:fd51b344ca86c9673db0161d4a383cccdb2f429c

commit r12-1819-gfd51b344ca86c9673db0161d4a383cccdb2f429c
Author: Martin Sebor <msebor@redhat.com>
Date:   Fri Jun 25 17:01:01 2021 -0600

    PR middle-end/101216 - spurious notes for function calls
    
            PR middle-end/101216
    
    gcc/ChangeLog:
    
            * calls.c (maybe_warn_rdwr_sizes): Use the no_warning constant.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.dg/Wnonnull-7.c: New test.

Diff:
---
 gcc/calls.c                       |  6 +++---
 gcc/testsuite/gcc.dg/Wnonnull-7.c | 15 +++++++++++++++
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/gcc/calls.c b/gcc/calls.c
index 27e8c451635..f8a4b79e7f8 100644
--- a/gcc/calls.c
+++ b/gcc/calls.c
@@ -2054,7 +2054,7 @@ maybe_warn_rdwr_sizes (rdwr_map *rwm, tree fndecl, tree fntype, tree exp)
 	*sizstr = '\0';
 
       /* Set if a warning has been issued for the current argument.  */
-      opt_code arg_warned = N_OPTS;
+      opt_code arg_warned = no_warning;
       location_t loc = EXPR_LOCATION (exp);
       tree ptr = access.second.ptr;
       if (*sizstr
@@ -2080,7 +2080,7 @@ maybe_warn_rdwr_sizes (rdwr_map *rwm, tree fndecl, tree fntype, tree exp)
 			       exp, sizidx + 1, sizstr))
 	    arg_warned = OPT_Wstringop_overflow_;
 
-	  if (arg_warned != N_OPTS)
+	  if (arg_warned != no_warning)
 	    {
 	      append_attrname (access, attrstr, sizeof attrstr);
 	      /* Remember a warning has been issued and avoid warning
@@ -2152,7 +2152,7 @@ maybe_warn_rdwr_sizes (rdwr_map *rwm, tree fndecl, tree fntype, tree exp)
 		arg_warned = OPT_Wnonnull;		
 	    }
 
-	  if (arg_warned)
+	  if (arg_warned != no_warning)
 	    {
 	      append_attrname (access, attrstr, sizeof attrstr);
 	      /* Remember a warning has been issued and avoid warning
diff --git a/gcc/testsuite/gcc.dg/Wnonnull-7.c b/gcc/testsuite/gcc.dg/Wnonnull-7.c
new file mode 100644
index 00000000000..e7b331a904c
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/Wnonnull-7.c
@@ -0,0 +1,15 @@
+/* PR middle-end/101216 - spurious notes for function calls
+   { dg-do compile }
+   { dg-options "-O2 -w" } */
+
+__attribute__ ((access (write_only, 1, 2))) char*
+getcwd (char *, __SIZE_TYPE__);
+
+char* f (void)
+{
+  char a[8];
+  return getcwd (0, 8);
+}
+
+/* Expect no messages of any kind on output.
+   { dg-bogus "" "" { target *-*-* } 0 } */