https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116325
Bug ID: 116325
Summary: [lra] error: unable to generate reloads for:
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: gjl at gcc dot gnu.org
Target Milestone: ---
Created attachment 58897
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58897&action=edit
pr60040-2.c: GNU-C99 test case from gcc.target/avr
$ avr-gcc pr60040-2.c -mlra -S -Os
/pr60040-2.c:112:1: error: unable to generate reloads for:
112 | }
| ^
(call_insn 44 43 45 3 (parallel [
(set (reg:HI 24 r24)
(call (mem:HI (reg/f:HI 79 [ ops_25(D)->blank ]) [0 *_26 S2
A8])
(const_int 0 [0])))
(use (const_int 0 [0]))
]) "gcc.target/avr/pr60040-2.c":66:10 774 {call_value_insn}
(expr_list:REG_DEAD (reg/f:HI 79 [ ops_25(D)->blank ])
(expr_list:REG_DEAD (reg:SI 20 r20)
(expr_list:REG_DEAD (reg:SI 16 r16)
(expr_list:REG_DEAD (reg:SI 12 r12)
(expr_list:REG_DEAD (reg:SI 8 r8)
(expr_list:REG_UNUSED (reg:HI 24 r24)
(expr_list:REG_CALL_DECL (nil)
(nil))))))))
(expr_list:HI (use (reg:HI 24 r24))
(expr_list:SI (use (reg:SI 20 r20))
(expr_list:SI (use (reg:SI 16 r16))
(expr_list:SI (use (reg:SI 12 r12))
(expr_list:SI (use (reg:SI 8 r8))
(nil)))))))
during RTL pass: reload
gcc.target/avr/pr60040-2.c:112:1: internal compiler error: in
curr_insn_transform, at lra-constraints.cc:4283
The insn in an indirect call, which should use the Z register (reg:HI 30) for
the target address.
Target: avr
Configured with: ../../source/gcc-master/configure --target=avr --disable-nls
--with-dwarf2 --with-gnu-as --with-gnu-ld --disable-shared
--with-long-double=64 --enable-languages=c,c++
