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[Bug target/26674] missed optimization / 128-bit arithmetic.
- From: "pluto at agmk dot net" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 22 Oct 2006 17:44:06 -0000
- Subject: [Bug target/26674] missed optimization / 128-bit arithmetic.
- References: <bug-26674-7667@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from pluto at agmk dot net 2006-10-22 17:44 -------
recent 4.2 produces worse %rcx setup code.
previously:
xorl %edx, %edx
movq %rdx, %rcx
now:
movq %rdi, %rax
sarq $63, %rax
movq %rax, %rcx
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26674