https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64213
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
CC| |hjl.tools at gmail dot com
--- Comment #3 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Richard Biener from comment #2)
> which means libcpp is miscompiled...? I notice that stage1 seems to work
> for you?
Yes, it is a miscompilation due to r218161.
Backing out r218161 with following patch allows bootstrap to proceed to stage3:
--cut here--
Index: combine.c
===================================================================
--- combine.c (revision 218489)
+++ combine.c (working copy)
@@ -1580,7 +1580,7 @@ setup_incoming_promotions (rtx_insn *first)
/* The mode and signedness of the argument as it is actually passed,
see assign_parm_setup_reg in function.c. */
- mode3 = promote_function_mode (TREE_TYPE (arg), mode1, &uns1,
+ mode3 = promote_function_mode (DECL_ARG_TYPE (arg), mode2, &uns3,
TREE_TYPE (cfun->decl), 0);
/* The mode of the register in which the argument is being passed. */
--cut here--
