Don't make something with an autoinc an equivalencing insn (PR69752).

	PR rtl-optimization/69752
	* ira.c (update_equiv_regs): When looking for more than a single SET,
	also take other side effects into account.

From-SVN: r233423

1 files changed, 2 insertions, 1 deletions

diff --git a/gcc/ira.c b/gcc/ira.c
index 81d1d33..6b4a104 100644
--- a/gcc/ira.c
+++ b/gcc/ira.c
@@ -3392,7 +3392,8 @@ update_equiv_regs (void)
 
 	  /* If this insn contains more (or less) than a single SET,
 	     only mark all destinations as having no known equivalence.  */
-	  if (set == NULL_RTX)
+	  if (set == NULL_RTX
+	      || side_effects_p (SET_SRC (set)))
 	    {
 	      note_stores (PATTERN (insn), no_equiv, NULL);
 	      continue;