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Author SHA1 Message Date
Min-Yih Hsu 4431d64c10 Support ExtVectorType conditional operator 
Extension vectors now can be used in element-wise conditional selector.
For example:
```
R[i] = C[i]? A[i] : B[i]
```
This feature was previously only enabled in OpenCL C. Now it's also
available in C. Not that it has different behaviors than GNU vectors
(i.e. __vector_size__). Extension vectors selects on signdness of the
vector. GNU vectors on the other hand do normal bool conversions. Also,
this feature is not available in C++.

Differential Revision: https://reviews.llvm.org/D80574
 2020-06-02 16:35:42 +00:00
Richard Smith abbb8ada45 Factor out common tautological comparison code from scalar and vector compare checking. 
In passing, improve vector compare diagnostic to match scalar compare diagnostic.

llvm-svn: 321972
 2018-01-07 21:57:48 +00:00
Douglas Gregor ec170db73d Warn about comparisons between arrays and improve self-comparison 
warnings, from Troy Straszheim! Fixes PR6163.

llvm-svn: 105631
 2010-06-08 19:50:34 +00:00