[Bug target/40499] [missed optimization] branch to return

[carrot at google dot com]

------- Comment #1 from carrot at google dot com  2009-06-20 03:56 -------
Created an attachment (id=18027)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18027&action=view)
test case

The command line options are: -march=armv5te -mthumb -Os

At the end of the function we can see

        b       .L3      // This one can be replaced by pop {pc}
.L5:
        mov     r0, #1
.L3:
        @ sp needed for prologue
        pop     {pc}

With option -O2 we can get similar result.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40499