[PATCH 09/25] Elide repeated RTL elements.

[ams]

GCN's 64-lane vectors tend to make RTL dumps very long.  This patch makes them
far more bearable by eliding long sequences of the same element into "repeated"
messages.

2018-09-05  Andrew Stubbs  <a...@codesourcery.com>
            Jan Hubicka  <j...@suse.cz>
            Martin Jambor  <mjam...@suse.cz>

        * print-rtl.c (print_rtx_operand_codes_E_and_V): Print how many times
        the same elements are repeated rather than printing all of them.
---
 gcc/print-rtl.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)


diff --git a/gcc/print-rtl.c b/gcc/print-rtl.c
index 5dd2e31..8a04264 100644
--- a/gcc/print-rtl.c
+++ b/gcc/print-rtl.c
@@ -370,7 +370,20 @@ rtx_writer::print_rtx_operand_codes_E_and_V (const_rtx in_rtx, int idx)
 	m_sawclose = 1;
 
       for (int j = 0; j < XVECLEN (in_rtx, idx); j++)
-	print_rtx (XVECEXP (in_rtx, idx, j));
+	{
+	  int j1;
+
+	  print_rtx (XVECEXP (in_rtx, idx, j));
+	  for (j1 = j + 1; j1 < XVECLEN (in_rtx, idx); j1++)
+	    if (XVECEXP (in_rtx, idx, j) != XVECEXP (in_rtx, idx, j1))
+	      break;
+
+	  if (j1 != j + 1)
+	    {
+	      fprintf (m_outfile, " repeated %ix", j1 - j);
+	      j = j1 - 1;
+	    }
+	}
 
       m_indent -= 2;
     }