https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93719
Bug ID: 93719
Summary: Unable to find a register to spill
Product: gcc
Version: 9.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: etchedpixels at gmail dot com
Target Milestone: ---
Created attachment 47831
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47831&action=edit
pdp11-aout-gcc -E capture of the problem file
pdp11-aout-gcc -fno-strict-aliasing -fomit-frame-pointer -fno-builtin
-msoft-float -Wall -Os -I../../../Library/include
-I../../../Library/include/pdp11 -c -o ac.o ac.c
ac.c: In function ‘logout’:
ac.c:214:1: error: unable to find a register to spill in class ‘GENERAL_REGS’
214 | }
| ^
ac.c:214:1: error: this is the insn:
(insn 60 59 61 16 (set (mem:DI (plus:HI (reg/v/f:HI 23 [ terminals.15_1 ])
(const_int 40 [0x28])) [1 tp_43->t_time+0 S8 A16])
(minus:DI (reg:DI 29 [ iftmp.16_11 ])
(mem:DI (plus:HI (reg/v/f:HI 23 [ terminals.15_1 ])
(const_int 40 [0x28])) [1 tp_43->t_time+0 S8 A16])))
"ac.c":207:8 77 {subdi3}
(expr_list:REG_DEAD (reg:DI 29 [ iftmp.16_11 ])
(nil)))
ac.c:214: confused by earlier errors, bailing out
gcc -S of source attached
