https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97887
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |vmakarov at gcc dot gnu.org
Target|x86_64 i?86 |x86_64-*-* i?86-*-*
Keywords| |needs-bisection, ra
Target Milestone|--- |10.3
Priority|P3 |P2
Summary|Failure to optimize neg |[10/11 Regression] Failure
|plus div to avoid using x87 |to optimize neg plus div to
|floating point stack |avoid using x87 floating
| |point stack
Known to fail| |10.2.0, 11.0
Known to work| |7.5.0, 9.3.1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Whoo:
********** Local #1: **********
Spilling non-eliminable hard regs: 7
New elimination table:
Can eliminate 16 to 7 (offset=8, prev_offset=0)
Can eliminate 16 to 6 (offset=8, prev_offset=0)
Can eliminate 19 to 7 (offset=0, prev_offset=0)
Can eliminate 19 to 6 (offset=0, prev_offset=0)
0 Non-prefered reload: reject+=600
0 Non input pseudo reload: reject++
1 Matching alt: reject+=2
1 Non-prefered reload: reject+=600
alt=0,overall=1227,losers=4,rld_nregs=2
Staticly defined alt reject+=600
0 Non-prefered reload: reject+=600
0 Non input pseudo reload: reject++
1 Matching alt: reject+=2
1 Non-prefered reload: reject+=600
alt=1,overall=1815,losers=2 -- refuse
Choosing alt 0 in insn 7: (0) =f (1) 0 {*negsf2_i387_1}
Creating newreg=89 from oldreg=86, assigning class FLOAT_REGS to r89
7: {r89:SF=-r89:SF;clobber flags:CC;}
REG_UNUSED flags:CC
Inserting insn reload before:
18: r89:SF=r88:SF
Inserting insn reload after:
19: r86:SF=r89:SF
WTF.
