On Okt 05 2021, Aldy Hernandez via Gcc-patches wrote: > From 5abe65668f602d53b8f3dc515508dc4616beb048 Mon Sep 17 00:00:00 2001 > From: Aldy Hernandez <al...@redhat.com> > Date: Tue, 5 Oct 2021 15:03:34 +0200 > Subject: [PATCH] Loosen loop crossing restriction in threader. > > Crossing loops is generally discouraged from the threader, but we can > make an exception when we don't cross the latch or enter another loop, > since this is just an early exit out of the loop.
This breaks bootstrap on aarch64 (in stage2): In function 'void mark_stack_region_used(poly_uint64, poly_uint64)', inlined from 'rtx_def* emit_library_call_value_1(int, rtx, rtx, libcall_type, machine_mode, int, rtx_mode_t*)' at ../../gcc/calls.c:4536:29: ../../gcc/calls.c:206:26: error: 'const_upper' may be used uninitialized in this function [-Werror=maybe-uninitialized] 206 | stack_usage_map[i] = 1; | ~~~~~~~~~~~~~~~~~~~^~~ ../../gcc/calls.c: In function 'rtx_def* emit_library_call_value_1(int, rtx, rtx, libcall_type, machine_mode, int, rtx_mode_t*)': ../../gcc/calls.c:202:39: note: 'const_upper' was declared here 202 | unsigned HOST_WIDE_INT const_lower, const_upper; | ^~~~~~~~~~~ Andreas. -- Andreas Schwab, sch...@linux-m68k.org GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 "And now for something completely different."