This is a patch to fix some testsuite failures reported for arm:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69847 The patch was bootstrapped and tested on x86-64 and ppc64. Committed as rev. 239180.
Index: ChangeLog =================================================================== --- ChangeLog (revision 239179) +++ ChangeLog (working copy) @@ -1,3 +1,10 @@ +2016-08-05 Vladimir Makarov <vmaka...@redhat.com> + + PR rtl-optimization/69847 + * lra-constraints.c (process_invariant_for_inheritance): Save + pattern instead of src. + (remove_inheritance_pseudos): Use the pattern. Add assert. + 2016-08-05 David Malcolm <dmalc...@redhat.com> * input.c (string_concat::string_concat): New constructor. Index: lra-constraints.c =================================================================== --- lra-constraints.c (revision 238991) +++ lra-constraints.c (working copy) @@ -5475,7 +5475,7 @@ process_invariant_for_inheritance (rtx d cl, "invariant inheritance"); bitmap_set_bit (&lra_inheritance_pseudos, REGNO (new_reg)); bitmap_set_bit (&check_only_regs, REGNO (new_reg)); - lra_reg_info[REGNO (new_reg)].restore_rtx = invariant_rtx; + lra_reg_info[REGNO (new_reg)].restore_rtx = PATTERN (insn); start_sequence (); lra_emit_move (new_reg, dst_reg); new_insns = get_insns (); @@ -6343,9 +6343,11 @@ remove_inheritance_pseudos (bitmap remov start_sequence (); /* We can not just change the source. It might be an insn different from the move. */ - lra_emit_move (SET_DEST (set), lra_reg_info[sregno].restore_rtx); + emit_insn (lra_reg_info[sregno].restore_rtx); rtx_insn *new_insns = get_insns (); end_sequence (); + lra_assert (single_set (new_insns) != NULL + && SET_DEST (set) == SET_DEST (single_set (new_insns))); lra_process_new_insns (curr_insn, NULL, new_insns, "Changing reload<-invariant inheritance"); delete_move_and_clobber (curr_insn, dregno);