[Bug rtl-optimization/33638] [4.3 regression]: wrong code with -fforce-addr

["ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #16 from ubizjak at gmail dot com  2007-10-06 06:49 -------
(In reply to comment #14)
> The testcase works for me, that is, it produces the expected output good.out.

Uh, you have to un-comment the line 315 of the comunpack.f test. The testcase,
as attached, produces good code. Un-commenting line 315, you will get:

.L80:
        movl    $0x40000000, (%esp)
        call    powf
        fstps   -152(%ebp)
        negl    -136(%ebp)
        fildl   -136(%ebp)
        fstps   4(%esp)
        movl    $0x41200000, (%esp)
        call    powf

Note that only one argument is loaded to the stack before first powf.

Without -fforce-address on un-commented testcase, we got:

.L80:
        fildl   -132(%ebp)
        fstps   4(%esp)
        movl    $0x40000000, (%esp)
        call    powf
        fstps   -140(%ebp)
        negl    -128(%ebp)
        fildl   -128(%ebp)
        fstps   4(%esp)
        movl    $0x41200000, (%esp)
        call    powf


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33638