[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.1-114-ge7227e9

[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.1-114-ge7227e9

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- Log -----------------------------------------------------------------
commit e7227e90cd1414b2d02884617da0346134892526
Author: Josh Stone <jistone@redhat.com>
Date:   Wed Feb 24 18:51:51 2010 -0800

    PR10719 cont'd: const-fold binary expressions
    
    We can compute results between two literals, we can reduce identity
    elements, and reduce constants if the non-literal side has no side
    effects.
    
    * elaborate.cxx (const_folder::visit_binary_expression): Implement.

commit 1cb79a7245a86f563a8e54a0b47937f253636bde
Author: Josh Stone <jistone@redhat.com>
Date:   Wed Feb 24 17:12:09 2010 -0800

    Permit chained unary operators
    
    The operand of a unary may be yet another unary.  This is useful for
    things like boolean normalization, !!x.
    
    * parse.cxx (parser::parse_unary): Recurse the operand.
    * testsuite/parseok/eleven.stp: Add chained unary operators.

commit a7e58d4c674003f192c4c8a834e80a3c23f9ec2e
Author: Josh Stone <jistone@redhat.com>
Date:   Wed Feb 24 16:43:06 2010 -0800

    PR10719 cont'd: const-fold logical ops
    
    We can compute results between two literals, we can short-circuit some
    literals on the left ("0&&x", "1||x"), and we can simplify literals on
    the right if the left has no side effect ("x&&0", "x||1").
    
    * elaborate.cxx (const_folder::visit_logical_or_expr): Implement.
      (const_folder::visit_logical_and_expr): Implement.

-----------------------------------------------------------------------

Summary of changes:
 elaborate.cxx                |  187 ++++++++++++++++++++++++++++++++++++++++--
 parse.cxx                    |    2 +-
 testsuite/parseok/eleven.stp |    8 ++-
 3 files changed, 189 insertions(+), 8 deletions(-)


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