fixup! WIP: Add support for function attributes

Add test for cold attribute in libgccjit

Author: GuillaumeGomez

gcc/testsuite/jit.dg/test-cold-attribute.c

@@ -0,0 +1,54 @@
+/* { dg-do compile { target x86_64-*-* } } */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "libgccjit.h"
+
+/* We don't want set_options() in harness.h to set -O3 so our little local
+   is optimized away. */
+#define TEST_ESCHEWS_SET_OPTIONS
+static void set_options (gcc_jit_context *ctxt, const char *argv0)
+{
+  // Set "-O2".
+  gcc_jit_context_set_int_option(ctxt, GCC_JIT_INT_OPTION_OPTIMIZATION_LEVEL, 2);
+}
+
+#define TEST_COMPILING_TO_FILE
+#define OUTPUT_KIND      GCC_JIT_OUTPUT_KIND_ASSEMBLER
+#define OUTPUT_FILENAME  "output-of-test-cold-attribute.c.s"
+#include "harness.h"
+
+void
+create_code (gcc_jit_context *ctxt, void *user_data)
+{
+  /* Let's try to inject the equivalent of:
+int
+__attribute__ ((cold))
+t()
+{
+  return -1;
+}
+
+  */
+  gcc_jit_type *int_type =
+    gcc_jit_context_get_type (ctxt, GCC_JIT_TYPE_INT);
+
+  gcc_jit_function *func_t =
+    gcc_jit_context_new_function (ctxt, NULL,
+				  GCC_JIT_FUNCTION_EXPORTED,
+				  int_type,
+				  "t",
+				  0, NULL,
+				  0);
+  gcc_jit_function_add_attribute(func_t, GCC_JIT_FN_ATTRIBUTE_COLD);
+  gcc_jit_block *block = gcc_jit_function_new_block (func_t, NULL);
+  gcc_jit_rvalue *ret = gcc_jit_context_new_rvalue_from_int (ctxt,
+    int_type,
+    -1);
+
+  gcc_jit_block_end_with_return (block, NULL, ret);
+}
+
+/* { dg-final { jit-verify-output-file-was-created "" } } */
+/* { dg-final { jit-verify-assembler-output "orl" } } */