https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87763
--- Comment #1 from Steve Ellcey <sje at gcc dot gnu.org> ---
I looked at one of the failing tests (gcc.target/aarch64/cvtf_1.c)
the code looks worse than before, generating an extra instruction
in each of the routines. Here is an example from one function where
there is an extra fmov that was not there before. The test runs at -O1
but the extra instruction appears at all optimization levels.
void cvt_int32_t_to_float (int a, float b)
{ float c; c = (float) a;
if ( (c - b) > 0.00001) abort();
}
Which used to generate:
cvt_int32_t_to_float:
.LFB0:
.cfi_startproc
scvtf s1, w0
fsub s0, s1, s0
fcvt d0, s0
adrp x0, .LC0
ldr d1, [x0, #:lo12:.LC0]
fcmpe d0, d1
bgt .L9
ret
.L9:
stp x29, x30, [sp, -16]!
.cfi_def_cfa_offset 16
.cfi_offset 29, -16
.cfi_offset 30, -8
mov x29, sp
bl abort
.cfi_endproc
Now generates:
cvt_int32_t_to_float:
.LFB0:
.cfi_startproc
fmov s1, w0
scvtf s1, s1
fsub s1, s1, s0
fcvt d1, s1
adrp x0, .LC0
ldr d0, [x0, #:lo12:.LC0]
fcmpe d1, d0
bgt .L9
ret
.L9:
stp x29, x30, [sp, -16]!
.cfi_def_cfa_offset 16
.cfi_offset 29, -16
.cfi_offset 30, -8
mov x29, sp
bl abort
.cfi_endproc
