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Author SHA1 Message Date
Tim Northover 0241637c0e Sema: disable implicit conversion from _Complex to real types in C++. 
Converting a _Complex type to a real one simply discards the imaginary part.
This can easily lead to loss of information so for safety (and GCC
compatibility) this patch disallows that when the conversion would be implicit.

The one exception is bool, which actually compares both real and imaginary
parts and so is safe.

llvm-svn: 310427
 2017-08-08 23:18:05 +00:00
Richard Trieu 729c8e9793 Adjust tests to have consistent integer sizes. 
Add a triple to the run lines so that integers will the same sizes across runs.
Also add a compile time check to ensure the assumptions about sizes are met.

llvm-svn: 265991
 2016-04-11 20:37:04 +00:00
Josh Magee 4d1a79b8c0 Catch more cases when diagnosing integer-constant-expression overflows. 
When visiting AssignmentOps, keep evaluating after a failure (when possible) in
order to identify overflow in subexpressions.

Differential Revision: http://reviews.llvm.org/D1238

llvm-svn: 228202
 2015-02-04 21:50:20 +00:00