https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81033
Dominique d'Humieres <dominiq at lps dot ens.fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[8 Regression] Bootstrap |[8 Regression] Revision
|broken on darwin |r249019 breaks bootstrap on
| |darwin
--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
I bootstrap again if I revert revision r249019.
The following patch
--- ../_clean/gcc/config/darwin.c 2017-01-01 17:39:06.000000000 +0100
+++ gcc/config/darwin.c 2017-06-10 17:19:31.000000000 +0200
@@ -3170,6 +3170,16 @@ darwin_override_options (void)
flag_reorder_blocks = 1;
}
+ /* Disable -freorder-blocks-and-partition when -fprofile-use is not in
+ effect. Function splitting was not actually being performed in that case,
+ as probably_never_executed_bb_p does not distinguish any basic blocks as
+ being cold vs hot when there is no profile data. Leaving it enabled,
+ however, causes the assembly code generator to create (empty) cold
+ sections and labels, leading to unnecessary size overhead. */
+ if (global_options_set.x_flag_reorder_blocks_and_partition
+ && !global_options_set.x_flag_profile_use)
+ flag_reorder_blocks_and_partition = 0;
+
/* FIXME: flag_objc_sjlj_exceptions is no longer needed since there is
only
one valid choice of exception scheme for each runtime. */
if (!global_options_set.x_flag_objc_sjlj_exceptions)
fixes bootstrap.
