[PATCH][i386] target: support spaces in target attribute.

[Martin Liška]

Hello.

The patch is about supporting target attribute values like "no-avx, sse2   ".
I'm planning doing the same change for aarch64 and other archs as well once
this one is accepted.

Patch can bootstrap on x86_64-linux-gnu and survives regression tests.

Ready to be installed?
Thanks,
Martin

	PR target/102374

gcc/ChangeLog:

	* config/i386/i386-options.c (ix86_valid_target_attribute_inner_p):
	* system.h (strip_spaces):

gcc/testsuite/ChangeLog:

	* gcc.target/i386/pr102374.c: New test.
---
  gcc/config/i386/i386-options.c           |  2 ++
  gcc/system.h                             | 21 +++++++++++++++++++++
  gcc/testsuite/gcc.target/i386/pr102374.c |  3 +++
  3 files changed, 26 insertions(+)
  create mode 100644 gcc/testsuite/gcc.target/i386/pr102374.c

diff --git a/gcc/config/i386/i386-options.c b/gcc/config/i386/i386-options.c
index e7a3bd4aaea..c88bc77b04d 100644
--- a/gcc/config/i386/i386-options.c
+++ b/gcc/config/i386/i386-options.c
@@ -1146,6 +1146,8 @@ ix86_valid_target_attribute_inner_p (tree fndecl, tree args, char *p_strings[],
  	  next_optstr = NULL;
  	}
  
+      p = strip_spaces (p, &len);
+
        /* Recognize no-xxx.  */
        if (len > 3 && p[0] == 'n' && p[1] == 'o' && p[2] == '-')
  	{
diff --git a/gcc/system.h b/gcc/system.h
index adde3e264b6..35b15203a96 100644
--- a/gcc/system.h
+++ b/gcc/system.h
@@ -1305,4 +1305,25 @@ startswith (const char *str, const char *prefix)
    return strncmp (str, prefix, strlen (prefix)) == 0;
  }
  
+/* Strip spaces from STRING with LEN length.
+   A stripped string is returned and LEN is updated accordingly.  */
+
+static inline char *
+strip_spaces (char *string, size_t *len)
+{
+  while (string[0] == ' ')
+    {
+      --(*len);
+      ++string;
+    }
+
+  while (string[*len - 1] == ' ')
+    {
+      string[*len - 1] = '\0';
+      --(*len);
+    }
+
+  return string;
+}
+
  #endif /* ! GCC_SYSTEM_H */
diff --git a/gcc/testsuite/gcc.target/i386/pr102374.c b/gcc/testsuite/gcc.target/i386/pr102374.c
new file mode 100644
index 00000000000..db84aeed9a5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr102374.c
@@ -0,0 +1,3 @@
+/* PR target/102374 */
+
+void calculate_sse(void) __attribute__ ((__target__ ("no-avx, sse2   ")));
-- 
2.33.0