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[Bug tree-optimization/49937] [4.7 Regression] g++.dg/tree-ssa/fwprop-align.C
- From: "hp at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 09 Aug 2011 20:25:14 +0000
- Subject: [Bug tree-optimization/49937] [4.7 Regression] g++.dg/tree-ssa/fwprop-align.C
- Auto-submitted: auto-generated
- References: <bug-49937-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49937
--- Comment #6 from Hans-Peter Nilsson <hp at gcc dot gnu.org> 2011-08-09 20:25:14 UTC ---
(In reply to comment #5)
> BIGGEST_ALIGNMENT is the
> "biggest alignment that any data type can require on this machine, in bits"
> "this is not the biggest alignment that is supported, just the biggest
> alignment that, when violated, may cause a fault".
Hence its use is suboptimal except as a fallback or when the *preferred*
alignment isn't stated, like in "LOCAL_ALIGNMENT (blob, BIGGEST_ALIGNMENT)".
Maybe it should be renamed to something matching its use, like
MAXIMUM_OF_MININUM_ALIGNMENTS_FOR_CPU_DATA_ACCESS...