From: Vladimir Makarov <vmakarov@redhat.com>
Date: Mon, 1 Apr 2019 16:18:30 +0000 (+0000)
Subject: re PR rtl-optimization/89865 (FAIL: gcc.target/i386/pr49095.c scan-assembler-times... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0d2a576a1417b8d4526d369fef1d87cee2c49f99;p=gcc.git

re PR rtl-optimization/89865 (FAIL: gcc.target/i386/pr49095.c scan-assembler-times \\\\), % 45)

2019-04-01  Vladimir Makarov  <vmakarov@redhat.com>

	PR rtl-optimization/89865
	* ira-costs.c (process_bb_node_for_hard_reg_moves): Skip hard
	register if it is a part of small class.

From-SVN: r270060
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2f55f595f3f..5016bd26c21 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2019-04-01  Vladimir Makarov  <vmakarov@redhat.com>
+
+	PR rtl-optimization/89865
+	* ira-costs.c (process_bb_node_for_hard_reg_moves): Skip hard
+	register if it is a part of small class.
+
 2019-04-01  Andrey Belevantsev  <abel@ispras.ru>
 
 	PR rtl-optimization/87273
diff --git a/gcc/ira-costs.c b/gcc/ira-costs.c
index a17dae3302c..c7feaba3718 100644
--- a/gcc/ira-costs.c
+++ b/gcc/ira-costs.c
@@ -2107,6 +2107,13 @@ process_bb_node_for_hard_reg_moves (ira_loop_tree_node_t loop_tree_node)
 	}
       else
 	continue;
+      if (reg_class_size[(int) REGNO_REG_CLASS (hard_regno)]
+	  == (ira_reg_class_max_nregs
+	      [REGNO_REG_CLASS (hard_regno)][(int) ALLOCNO_MODE(a)]))
+	/* If the class can provide only one hard reg to the allocno,
+	   we processed the insn record_operand_costs already and we
+	   actually updated the hard reg cost there.  */
+	continue;
       rclass = ALLOCNO_CLASS (a);
       if (! TEST_HARD_REG_BIT (reg_class_contents[rclass], hard_regno))
 	continue;