commit c8547d856d3459a61ca9e35b5342288fe626c295
author Chris Lattner <sabre@nondot.org> Fri Dec 23 05:37:50 2005 +0000
committer Chris Lattner <sabre@nondot.org> Fri Dec 23 05:37:50 2005 +0000
tree ad63f1598ca842ffd23ac170dd5ef2bec21bebd3
parent 94683777aee436a0e5f12e08a4b3827a11265fb2

Fold bitconv(bitconv(x)) -> x.  We now compile this:

void foo(double);
void bar(double X) { foo(X); }

to this:

bar:
        save -96, %o6, %o6
        or %g0, %i0, %o0
        or %g0, %i1, %o1
        call foo
        nop
        restore %g0, %g0, %g0
        retl
        nop

instead of this:

bar:
        save -112, %o6, %o6
        st %i1, [%i6+-4]
        st %i0, [%i6+-8]
        ldd [%i6+-8], %f0
        std %f0, [%i6+-16]
        ld [%i6+-12], %o1
        ld [%i6+-16], %o0
        call foo
        nop
        restore %g0, %g0, %g0
        retl
        nop

on V8.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24981 91177308-0d34-0410-b5e6-96231b3b80d8