[Bug target/46088] [4.6 Regression] ICE: SIGSEGV in ix86_binary_operator_ok (i386.c:15025) with -Os -fnon-call-exceptions -fpeel-loops

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46088

--- Comment #4 from Uros Bizjak <ubizjak at gmail dot com> 2010-11-04 16:32:57 
UTC ---
The insn that was matched looks like:

(gdb) up
#1  0x0000000000b9da94 in recog_7 (x0=0x7ffff1f329d8, insn=0x7ffff1f296c0, 
    pnum_clobbers=0x7fffffffdc9c)
    at ../../gcc-svn/trunk/gcc/config/i386/i386.md:10089
10089       && ix86_binary_operator_ok (<CODE>, <MODE>mode, operands)"
(gdb) p debug_rtx (insn)
(insn 7 6 8 2 (set (reg:CCZ 17 flags)
        (compare:CCZ (lshiftrt:SI (reg/v:SI 60 [ i ])
                (const_int 3 [0x3]))
            (const_int 0 [0]))) pr46088.c:5 2 {*cmpsi_ccno_1}
     (nil))
$1 = void

So, clobber of the scratch reg is missing, but the insn is recognized as
*lshrsi3_cconly anyway.