https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115307
Bug ID: 115307
Summary: [avr] Don't expand isinf() like a built-in
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: gjl at gcc dot gnu.org
Target Milestone: ---
avr-gcc compiles
int isinff (float);
int call_isinff (float f)
{
return isinff (f);
}
like:
call_isinff:
push r12 ; 63 [c=4 l=1] pushqi1/0
push r13 ; 64 [c=4 l=1] pushqi1/0
push r14 ; 65 [c=4 l=1] pushqi1/0
push r15 ; 66 [c=4 l=1] pushqi1/0
push r28 ; 67 [c=4 l=1] pushqi1/0
/* prologue: function */
/* frame size = 0 */
/* stack size = 5 */
.L__stack_usage = 5
movw r12,r22 ; 56 [c=4 l=2] *movsf/0
movw r14,r24
clt ; 57 [c=4 l=2] *abssf2/1
bld r15,7
ldi r28,lo8(1) ; 58 [c=4 l=1] movqi_insn/1
ldi r18,lo8(-1) ; 59 [c=4 l=4] *movsf/4
ldi r19,lo8(-1)
ldi r20,lo8(127)
ldi r21,lo8(127)
movw r24,r14 ; 60 [c=4 l=2] *movsf/0
movw r22,r12
call __unordsf2 ; 10 [c=12 l=2] call_value_insn/1
cpse r24,__zero_reg__ ; 61 [c=0 l=1] enable_interrupt-3
rjmp .L2
ldi r18,lo8(-1) ; 52 [c=4 l=4] *movsf/4
ldi r19,lo8(-1)
ldi r20,lo8(127)
ldi r21,lo8(127)
movw r24,r14 ; 53 [c=4 l=2] *movsf/0
movw r22,r12
call __lesf2 ; 15 [c=12 l=2] call_value_insn/1
cp __zero_reg__,r24 ; 77 [c=16 l=1] *swapped_tstqi
brge .L2 ; 78 [c=4 l=1] branch
ldi r28,0 ; 51 [c=4 l=1] movqi_insn/0
.L2:
ldi r24,lo8(1) ; 45 [c=4 l=1] movqi_insn/1
eor r24,r28 ; 46 [c=4 l=1] *xorqi3
ldi r25,0 ; 50 [c=4 l=1] movqi_insn/0
/* epilogue start */
pop r28 ; 70 [c=4 l=1] popqi
pop r15 ; 71 [c=4 l=1] popqi
pop r14 ; 72 [c=4 l=1] popqi
pop r13 ; 73 [c=4 l=1] popqi
pop r12 ; 74 [c=4 l=1] popqi
ret ; 75 [c=0 l=1] return_from_epilogue
where a simple call to isinff would be mush better.
