From: Uros Bizjak <ubizjak@gmail.com>
Date: Thu, 24 Jan 2019 20:48:01 +0000 (+0100)
Subject: re PR rtl-optimization/88948 (ICE in elimination_costs_in_insn, at reload1.c:3640... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=53f2f08b057b6b57b5d8b99db10b63de0634715c;p=gcc.git

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
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7b797550ba7..915d32ef0ce 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,13 @@
+2019-01-24  Uroš Bizjak  <ubizjak@gmail.com>
+
+	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.
+
 2019-01-24  Jakub Jelinek  <jakub@redhat.com>
 
 	PR debug/89006
diff --git a/gcc/gcse.c b/gcc/gcse.c
index 35716cd3883..6c77671fe31 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.  */
diff --git a/gcc/rtl.h b/gcc/rtl.h
index 70891e6e364..f99191983d3 100644
--- a/gcc/rtl.h
+++ b/gcc/rtl.h
@@ -4078,6 +4078,9 @@ extern void init_lower_subreg (void);
 /* In gcse.c */
 extern bool can_copy_p (machine_mode);
 extern bool can_assign_to_reg_without_clobbers_p (rtx, machine_mode);
+extern rtx_insn *prepare_copy_insn (rtx, rtx);
+
+/* In cprop.c */
 extern rtx fis_get_condition (rtx_insn *);
 
 /* In ira.c */
diff --git a/gcc/store-motion.c b/gcc/store-motion.c
index 28c4825b343..a0838f68ba0 100644
--- a/gcc/store-motion.c
+++ b/gcc/store-motion.c
@@ -912,8 +912,7 @@ replace_store_insn (rtx reg, rtx_insn *del, basic_block bb,
   rtx_insn *insn;
   rtx mem, note, set;
 
-  mem = smexpr->pattern;
-  insn = gen_move_insn (reg, SET_SRC (single_set (del)));
+  insn = prepare_copy_insn (reg, SET_SRC (single_set (del)));
 
   unsigned int i;
   rtx_insn *temp;
@@ -946,6 +945,7 @@ replace_store_insn (rtx reg, rtx_insn *del, basic_block bb,
   /* Now we must handle REG_EQUAL notes whose contents is equal to the mem;
      they are no longer accurate provided that they are reached by this
      definition, so drop them.  */
+  mem = smexpr->pattern;
   for (; insn != NEXT_INSN (BB_END (bb)); insn = NEXT_INSN (insn))
     if (NONDEBUG_INSN_P (insn))
       {
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 285c69971c7..e7ac88c3ca0 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2019-01-24  Uroš Bizjak  <ubizjak@gmail.com>
+
+	PR target/88948
+	* gcc.target/i386/pr88948.c: New test.
+
 2019-01-24  Jakub Jelinek  <jakub@redhat.com>
 
 	PR debug/89006
diff --git a/gcc/testsuite/gcc.target/i386/pr88948.c b/gcc/testsuite/gcc.target/i386/pr88948.c
new file mode 100644
index 00000000000..5b50803b60b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr88948.c
@@ -0,0 +1,5 @@
+/* PR rtl-optimization/88948 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fgcse-sm -msse3 -mfpmath=387" } */
+
+#include "../../gcc.c-torture/execute/stdarg-3.c"