[Bug rtl-optimization/33927] replace_read in dse.c could handle cases where GET_MODE_CLASS (read_mode) != GET_MODE_CLASS (store_mode) (and the size is the same)

[pinskia at gcc dot gnu dot org]

------- Comment #5 from pinskia at gcc dot gnu dot org  2008-03-23 00:48 -------
(In reply to comment #4)
> I've applied a patch that should fix this.  No-one's confirmed
> whether it does though, so I'm marking the PR as waiting.

And I just confirmed, it does fix it, on powerpc64-darwin:

--- old.s       2008-03-22 17:47:53.000000000 -0700
+++ new.s       2008-03-22 17:47:18.000000000 -0700
@@ -24,22 +24,15 @@ _test2:
        stw r0,-4(r1)
        oris r0,r0,0xc000
        mtspr 256,r0
-       li r0,48
-       li r9,64
-       vaddfp v2,v2,v2
-       addi r2,r1,16
-       addi r11,r1,48
+       vaddfp v0,v2,v2
+       addi r2,r1,48
        lwz r12,-4(r1)
-       vaddfp v3,v3,v3
-       stvx v2,0,r11
-       stvx v3,r2,r0
-       lvx v0,0,r11
-       lvx v1,r2,r0
-       addi r2,r1,-128
-       stvx v0,r2,r0
-       stvx v1,r2,r9
-       lvx v2,r2,r0
-       lvx v3,r2,r9
+       vaddfp v1,v3,v3
+       vor v2,v0,v0
+       vor v3,v1,v1
+       stvx v0,0,r2
+       addi r2,r1,64
+       stvx v1,0,r2
        mtspr 256,r12
        blr
        .subsections_via_symbols

Thanks for the fix Richard.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33927