[Bug tree-optimization/44900] [4.5 Regression] The variable of SSE will be broken

[pinskia at gcc dot gnu dot org]

------- Comment #22 from pinskia at gcc dot gnu dot org  2010-07-14 16:50 
-------
(In reply to comment #21)
> Even if it did not voilate aliasing rules, the IR looks good:

The expansion looks incorrect though:
(insn 39 38 40 t.cc:55 (set (reg:DI 107)
        (vec_select:DI (reg:V2DI 79 [ D.4999 ])
            (parallel [
                    (const_int 1 [0x1])
                ]))) -1 (nil))

(insn 40 39 41 t.cc:55 (set (reg:DI 108)
        (vec_select:DI (reg:V2DI 79 [ D.4999 ])
            (parallel [
                    (const_int 1 [0x1])
                ]))) -1 (nil))

(insn 41 40 42 t.cc:55 (set (reg:DI 109)
        (vec_select:DI (reg:V2DI 79 [ D.4999 ])
            (parallel [
                    (const_int 0 [0x0])
                ]))) -1 (nil))

(insn 42 41 43 t.cc:55 (set (reg:DI 110)
        (vec_select:DI (reg:V2DI 79 [ D.4999 ])
            (parallel [
                    (const_int 0 [0x0])
                ]))) -1 (nil))

(insn 43 42 44 t.cc:55 (set (reg:SI 37 r8)
        (subreg:SI (reg:DI 107) 0)) -1 (nil))

(insn 44 43 45 t.cc:55 (set (reg:SI 2 cx)
        (subreg:SI (reg:DI 108) 0)) -1 (nil))

(insn 45 44 46 t.cc:55 (set (reg:SI 1 dx)
        (subreg:SI (reg:DI 109) 0)) -1 (nil))

(insn 46 45 47 t.cc:55 (set (reg:SI 4 si)
        (subreg:SI (reg:DI 110) 0)) -1 (nil))

Please file that as a different bug.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44900