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Part 2 (the Clang portion) of D59881.
This patch (first of two patches) enables the vectorizer to recognize the
IBM MASS vector library routines. This patch specifically adds support for
recognizing the -vector-library=MASSV option, and defines mappings from IEEE
standard scalar math functions to generic PowerPC MASS vector counterparts.
For instance, the generic PowerPC MASS vector entry for double-precision
cbrt function is __cbrtd2_massv.
The second patch will further lower the generic PowerPC vector entries to
PowerPC subtarget-specific entries.
For instance, the PowerPC generic entry cbrtd2_massv is lowered to
cbrtd2_P9 for Power9 subtarget.
The overall support for MASS vector library is presented as such in two patches
for ease of review.
Patch by Jeeva Paudel.
Differential revision: https://reviews.llvm.org/D59881
llvm-svn: 362571
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