re PR middle-end/40669 (ICE in gimple_assign_set_rhs1 from eliminate_tail_call)

	PR middle-end/40669
	* tree-tailcall.c (adjust_return_value_with_ops,
	create_tailcall_accumulator): Set DECL_GIMPLE_REG_P on the temporary
	if it has complex or vector type.

	* gcc.dg/pr40669.c: New test.

From-SVN: r149319

1 files changed, 26 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/pr40669.c b/gcc/testsuite/gcc.dg/pr40669.c
new file mode 100644
index 00000000000..cc6bbc9e08a
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr40669.c
@@ -0,0 +1,26 @@
+/* PR middle-end/40669 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -ffast-math" } */
+
+double _Complex
+test (int d, int t, double *x, double *y, double *z, int n,
+      double _Complex (*fnp) (double))
+{
+  int m = n / 2;
+  double min = y[t], max = z[t], med = x[m * d + t];
+  double _Complex result = 0.0;
+
+  if (n == 0)
+    return 0.0;
+
+  if (min > med)
+    result += test (d, (t + 1) % d, x + (m + 1) * d, y, z, n - m - 1, fnp);
+  else if (max < med)
+    result += test (d, (t + 1) % d, x, y, z, m, fnp);
+  else
+    {
+      result += fnp (y[0] + x[m]);
+      result += test (d, (t + 1) % d, x + (m + 1) * d, y, z, n - m - 1, fnp);
+    }
+  return result;
+}