re PR target/21518 (unable to find a register with -fPIC and -O2 and non inlining static function)

        PR 21518
        * loop.c (scan_loop): Do not propagate computations to a hard
        register destination with SMALL_REGISTER_CLASSES.

From-SVN: r106373

1 files changed, 32 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/i386/pr21518.c b/gcc/testsuite/gcc.target/i386/pr21518.c
new file mode 100644
index 0000000..f2ac666
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr21518.c
@@ -0,0 +1,32 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fPIC -fno-tree-pre" } */
+/* { dg-require-effective-target ilp32 } */
+
+extern void __attribute__ ((regparm (3)))
+drawPointsLines (char type, int first, int *dd);
+
+int
+do_locator (int *call)
+{
+  char prephitmp5;
+  int type;
+  int i;
+
+  if (call == 0)
+    prephitmp5 = 1;
+  else
+    {
+      type = *call;
+      i = 0;
+      do
+	{
+	  if (i != type)
+	    drawPointsLines ((int) (char) type, 0, call);
+	  i = i + 1;
+	}
+      while (i != 2);
+      prephitmp5 = (char) type;
+    }
+  drawPointsLines ((int) prephitmp5, 0, call);
+  return 0;
+}