[Webkit-unassigned] [Bug 14521] JavaScriptCore fails to build on Linux/PPC gcc 4.1.2

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Sun Nov 11 19:04:55 PST 2007


mjs at apple.com changed:

           What    |Removed                     |Added
  Attachment #17187|review?                     |review+
               Flag|                            |

------- Comment #10 from mjs at apple.com  2007-11-11 19:04 PDT -------
(From update of attachment 17187)
There's two possible kinds of problems that can be caused by getting the
assembly operand constraints wrong:

1) Inferior codegen, due to overconstraining the operands, and forcing gcc to
do needless moves.

2) Incorrect codegen, de to using an operand that is disallowed.

I think #2 will make the assembly stage fail, so if PPC compiles with this
patch it should be safe. For #1, we should be ok as well, because m is a looser
constraint than o, so you'd never have a needless copy to satisfy m when o is


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