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Author SHA1 Message Date
John McCall d0a300162e __block variables require us to evaluate the RHS of an assignment before 
the LHS, or else the pointer might be invalid.  This is kindof dumb, but
go ahead and make sure we're doing that for l-value scalar assignment,
which fixes a miscompile of obj-c++.dg/block-seq.mm.

Leave a FIXME for how to solve this problem for agg __blocks.

llvm-svn: 120992
 2010-12-06 06:10:02 +00:00
John McCall a2342eb857 Fix a bug in the emission of __real/__imag l-values on scalar operands. 
Fix a bug in the emission of complex compound assignment l-values.
Introduce a method to emit an expression whose value isn't relevant.
Make that method evaluate its operand as an l-value if it is one.
Fixes our volatile compliance in C++.

llvm-svn: 120931
 2010-12-05 02:00:02 +00:00
John McCall 4f29b49de1 Support compound complex operations as l-values in C++. Add a test 
case based on CodeGen/volatile-1.c which tests the current C++
semantics, and note the many, many places we fall short of them.

llvm-svn: 119402
 2010-11-16 23:07:28 +00:00