Re: Strange problems building bigloo on ia64

[David Mosberger <davidm@napali.hpl.hp.com>]

>>>>> On Mon, 19 May 2003 10:21:04 +0200, Christian Hinkelbein <hinkelbein@ti.uni-mannheim.de> said:

  >> /tmp/ccnfO17g.s: Assembler messages:
  >> /tmp/ccnfO17g.s:958: Warning: Use of 'mov' may violate WAW dependency 'GR%, % in 1 - 127' (impliedf), specific resource number is 14

  Christian> This only occurs when using option -O3 to gcc.  This
  Christian> looks like beeing an assembler problem, not one from gcc.
  Christian> Also, when looking into the assembler output, i could not
  Christian> find an error:

GCC sometimes fails to issue appropriate .pred.rel.mutex directives,
which would help the assembler determine that there is indeed no
dependency violation.  As GCC gets improved, these false positives
should disappear.  For now, you'll have to ignore them (well, it's
good to keep an eye on them, just to be safe...).

	--david