https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81995
Bug ID: 81995
Summary: [8.0 Regression] gcc/reg-stack.c:2073:1: error:
unrecognizable insn:
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: gerald at pfeifer dot com
Target Milestone: ---
Target: i586-unknown-freebsd10.3
This seems to have been introduced between Aug 20th 16:40 GMT and
Aug 21th 16:40 GMT on i586-unknown-freebsd10.3:
/scratch/tmp/gerald/GCC-HEAD/gcc/reg-stack.c: In function 'bool
subst_stack_regs
_pat(rtx_insn*, stack_ptr, rtx)':
/scratch/tmp/gerald/GCC-HEAD/gcc/reg-stack.c:2073:1: error: unrecognizable
insn:
}
^
(insn 2014 669 671 94 (parallel [
(set (reg:SI 588 [ _913 ])
(ior:SI (ashift:SI (const_int 1 [0x1])
(subreg:QI (reg:SI 581 [ pretmp_894 ]) 0))
(mem:SI (plus:SI (reg/f:SI 568 [ _856 ])
(const_int 4 [0x4])) [0 MEM[(struct stack_def
*)_856
+ 4B]+0 S4 A32])))
(clobber (reg:CC 17 flags))
]) -1
(nil))
during RTL pass: subreg2
/scratch/tmp/gerald/GCC-HEAD/gcc/reg-stack.c:2073:1: internal compiler error:
in
extract_insn, at recog.c:2311
My guess is this is specific to i586 (or i386), though I did not find an
immediate candidate commit.
