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Re: optimization/5263: a & b & ~a & ~b not optimized
- From: bangerth at dealii dot org
- To: Kai dot Tietz at onevision dot de, gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, nobody at gcc dot gnu dot org
- Date: 15 Mar 2003 04:26:15 -0000
- Subject: Re: optimization/5263: a & b & ~a & ~b not optimized
- Reply-to: bangerth at dealii dot org, Kai dot Tietz at onevision dot de, gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, nobody at gcc dot gnu dot org, gcc-gnats at gcc dot gnu dot org
Old Synopsis: Poor optimization for expression with more than three operands
New Synopsis: a & b & ~a & ~b not optimized
State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Sat Mar 15 04:26:14 2003
State-Changed-Why:
Confirmed. Behavior persists on mainline. While
a & b & ~a & ~b
is not optimized, the reordered expression
a & ~a & b & ~b
is.
W.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5263