re PR rtl-optimization/88948 (ICE in elimination_costs_in_insn, at reload1.c:3640 since r264148)

	PR target/88948
	* rtl.h (prepare_copy_insn): New prototype.
	* gcse.c (prepare_copy_insn): New function, split out from
	process_insert_insn.
	(process_insert_insn): Use prepare_copy_insn.
	* store-motion.c (replace_store_insn): Use prepare_copy_insn
	instead of gen_move_insn.

testsuite/ChangeLog:

	PR target/88948
	* gcc.target/i386/pr88948.c: New test.

From-SVN: r268249

1 files changed, 15 insertions, 6 deletions

diff --git a/gcc/gcse.c b/gcc/gcse.c
index 35716cd..6c77671 100644
--- a/gcc/gcse.c
+++ b/gcc/gcse.c
@@ -1963,14 +1963,11 @@ pre_expr_reaches_here_p (basic_block occr_bb, struct gcse_expr *expr, basic_bloc
   return rval;
 }
 
-/* Generate RTL to copy an EXPR to its `reaching_reg' and return it.  */
+/* Generate RTL to copy an EXP to REG and return it.  */
 
-static rtx_insn *
-process_insert_insn (struct gcse_expr *expr)
+rtx_insn *
+prepare_copy_insn (rtx reg, rtx exp)
 {
-  rtx reg = expr->reaching_reg;
-  /* Copy the expression to make sure we don't have any sharing issues.  */
-  rtx exp = copy_rtx (expr->expr);
   rtx_insn *pat;
 
   start_sequence ();
@@ -1996,6 +1993,18 @@ process_insert_insn (struct gcse_expr *expr)
   return pat;
 }
 
+/* Generate RTL to copy an EXPR to its `reaching_reg' and return it.  */
+
+static rtx_insn *
+process_insert_insn (struct gcse_expr *expr)
+{
+  rtx reg = expr->reaching_reg;
+  /* Copy the expression to make sure we don't have any sharing issues.  */
+  rtx exp = copy_rtx (expr->expr);
+
+  return prepare_copy_insn (reg, exp);
+}
+
 /* Add EXPR to the end of basic block BB.
 
    This is used by both the PRE and code hoisting.  */