ipa/97673 - fix input_location leak

[gcc.git] / gcc / dse.c

diff --git a/gcc/dse.c b/gcc/dse.c
index d65266b547646706bd443d4c2841a098c3a6fc90..c88587e7d941e3bf26c351a67d8641fd54485852 100644 (file)
--- a/gcc/dse.c
+++ b/gcc/dse.c
@@ -1,5 +1,5 @@
 /* RTL dead store elimination.
-   Copyright (C) 2005-2020 Free Software Foundation, Inc.
+   Copyright (C) 2005-2021 Free Software Foundation, Inc.
 
    Contributed by Richard Sandiford <rsandifor@codesourcery.com>
    and Kenneth Zadeck <zadeck@naturalbridge.com>
@@ -1757,8 +1757,7 @@ find_shift_sequence (poly_int64 access_size,
      the machine.  */
 
   opt_scalar_int_mode new_mode_iter;
-  FOR_EACH_MODE_FROM (new_mode_iter,
-                     smallest_int_mode_for_size (GET_MODE_BITSIZE (read_mode)))
+  FOR_EACH_MODE_IN_CLASS (new_mode_iter, MODE_INT)
     {
       rtx target, new_reg, new_lhs;
       rtx_insn *shift_seq, *insn;
@@ -1767,6 +1766,8 @@ find_shift_sequence (poly_int64 access_size,
       new_mode = new_mode_iter.require ();
       if (GET_MODE_BITSIZE (new_mode) > BITS_PER_WORD)
        break;
+      if (maybe_lt (GET_MODE_SIZE (new_mode), GET_MODE_SIZE (read_mode)))
+       continue;
 
       /* Try a wider mode if truncating the store mode to NEW_MODE
         requires a real instruction.  */