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[Bug target/41366] Invariant algebraic expressions using mixed 64 and 32 bit expressions not recognized.
- From: "pinskia at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sun, 23 Sep 2012 22:07:20 +0000
- Subject: [Bug target/41366] Invariant algebraic expressions using mixed 64 and 32 bit expressions not recognized.
- Auto-submitted: auto-generated
- References: <bug-41366-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41366
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|arm-elf-unknown |arm*-*-*
Host|x86-elf-linux |
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-09-23 22:07:20 UTC ---
(insn 8 28 9 2 (set (subreg:SI (reg:DI 144 [ b ]) 4)
(reg:SI 1 r1 [ b ])) t4.c:3 640 {*arm_movsi_vfp}
(expr_list:REG_DEAD (reg:SI 1 r1 [ b ])
(nil)))
(insn 9 8 10 2 (set (subreg:SI (reg:DI 144 [ b ]) 0)
(const_int 0 [0])) t4.c:3 640 {*arm_movsi_vfp}
(nil))
(note 10 9 11 2 NOTE_INSN_DELETED)
(insn 11 10 26 2 (set (reg:DI 141)
(ior:DI (zero_extend:DI (reg:SI 0 r0 [ a ]))
(reg:DI 144 [ b ]))) t4.c:3 95 {*iordi_zesidi_di}
(expr_list:REG_DEAD (reg:SI 0 r0 [ a ])
(expr_list:REG_DEAD (reg:DI 144 [ b ])
(nil))))
Combine does not know how to combine those instructions.