From: Martin Liska <mliska@suse.cz>
Date: Mon, 27 Aug 2018 13:18:43 +0000 (+0200)
Subject: Add test for memcpy expansion with hint.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6b60ee204f80649803dc78c24ab9c94ff8f51789;p=gcc.git

Add test for memcpy expansion with hint.

2018-08-27  Martin Liska  <mliska@suse.cz>

	* config/i386/i386.c (ix86_expand_set_or_movmem): Dump
        selected expansion strategy.
2018-08-27  Martin Liska  <mliska@suse.cz>

	* gcc.dg/tree-prof/val-prof-10.c: New test.

From-SVN: r263881
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 459bcaddc07..6c79e41f2db 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2018-08-27  Martin Liska  <mliska@suse.cz>
+
+	* config/i386/i386.c (ix86_expand_set_or_movmem): Dump
+        selected expansion strategy.
+
 2018-08-27  Martin Liska  <mliska@suse.cz>
 
 	* builtins.h (is_builtin_fn): Remove and fndecl_built_in_p.
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index eab482c4c84..c437c18a29c 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -27530,6 +27530,11 @@ ix86_expand_set_or_movmem (rtx dst, rtx src, rtx count_exp, rtx val_exp,
 		    issetmem,
 		    issetmem && val_exp == const0_rtx, have_as,
 		    &dynamic_check, &noalign, false);
+
+  if (dump_file)
+    fprintf (dump_file, "Selected stringop expansion strategy: %s\n",
+	     stringop_alg_names[alg]);
+
   if (alg == libcall)
     return false;
   gcc_assert (alg != no_stringop);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 6e74b17c2fc..6e6ffd84ff2 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2018-08-27  Martin Liska  <mliska@suse.cz>
+
+	* gcc.dg/tree-prof/val-prof-10.c: New test.
+
 2018-08-27  Martin Liska  <mliska@suse.cz>
 
         PR tree-optimization/86847
diff --git a/gcc/testsuite/gcc.dg/tree-prof/val-prof-10.c b/gcc/testsuite/gcc.dg/tree-prof/val-prof-10.c
new file mode 100644
index 00000000000..57854b5911b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-prof/val-prof-10.c
@@ -0,0 +1,31 @@
+/* { dg-options "-O2 -fdump-rtl-expand -mtune=core2" } */
+/* { dg-skip-if "" { ! { i?86-*-* x86_64-*-* } } } */
+
+long buffer1[128], buffer2[128];
+char *x;
+
+void foo(long *r)
+{
+  x = (char *)r;
+  asm volatile("" ::: "memory");
+}
+
+void
+__attribute__((noinline))
+compute()
+{
+  volatile int n = 24;
+  __builtin_memcpy (buffer1, buffer2, n);
+  foo (&buffer1[0]);
+}
+
+int
+main()
+{
+  for (unsigned i = 0; i < 10000; i++)
+    compute ();
+
+  return 0;
+}
+
+/* { dg-final-use-not-autofdo { scan-rtl-dump "Selected stringop expansion strategy: rep_byte" "expand" } } */