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patch to fix PR82338

Message ID cdccf076-3f26-a9a6-d930-564aac4e9499@redhat.com
State New
Headers show
Series patch to fix PR82338 | expand

Commit Message

Vladimir Makarov Sept. 29, 2017, 5:16 p.m. UTC 
The following patch fixes

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82338

The patch was bootstrapped and tested on x86-64.

Committed as rev. 253259.
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Patch

Index: ChangeLog
===================================================================
--- ChangeLog   (revision 253298)
+++ ChangeLog   (working copy)
@@ -1,3 +1,8 @@ 
+2017-09-29  Vladimir Makarov <vmakarov@redhat.com>
+
+       PR rtl-optimization/82338
+       * lra-constraints.c (inherit_in_ebb): Check usage_insns check.
+
  2017-09-29  Alexander Monakov <amonakov@ispras.ru>

     * genmodes.c (calc_wider_mode): Suppress qsort macro.
Index: lra-constraints.c
===================================================================
--- lra-constraints.c   (revision 253298)
+++ lra-constraints.c   (working copy)
@@ -6219,6 +6219,7 @@  inherit_in_ebb (rtx_insn *head, rtx_insn
                   && ((cheap = XEXP (cheap, 0)), true)
                   && (regno = REGNO (cheap)) >= FIRST_PSEUDO_REGISTER
                   && (hard_regno = reg_renumber[regno]) >= 0
+                 && usage_insns[regno].check == curr_usage_insns_check
                   /* If there are pending saves/restores, the
                      optimization is not worth.  */
                   && usage_insns[regno].calls_num == calls_num - 1