------- Comment #7 from ubizjak at gmail dot com 2007-02-25 07:54 -------
(In reply to comment #6)
> This patch however fixes one extra pasto and makes the prologue test
> unconditional - I was a bit overagressive minimizing amount of RTL produced
> that only leads to bugs in side corners.
This patch ICEs for "-O2 -march=nocona -m32" on the testcase above:
pr30778.c: In function init_reg_last:
pr30778.c:21: internal compiler error: in predict_jump, at
config/i386/i386.c:13246
BTW: For -march=k8, we now generate:
movq reg_stat(%rip), %rax
movq $0, (%rax)
addq $8, %rax
movq $0, (%rax)
addq $8, %rax
movq $0, (%rax)
addq $8, %rax
movl $0, (%rax)
addq $4, %rax
movw $0, (%rax)
movb $0, 2(%rax)
ret
and previously:
movq reg_stat(%rip), %rax
movq $0, (%rax)
movq $0, 8(%rax)
movq $0, 16(%rax)
movl $0, 24(%rax)
movw $0, 28(%rax)
movb $0, 30(%rax)
ret
(I don't know if this is intentionally, just want to point it out.)
--
ubizjak at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|ubizjak at gmail dot com |unassigned at gcc dot gnu
| |dot org
Status|ASSIGNED |NEW
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30778
