Matt Pharr 7c91b01125 Handle more forms of constant vectors in lGetMask(). ...

Various optimization passes depend on turning a compile-time constant
mask into a bit vector; it turns out that in LLVM3.1, constant vectors
of ints/floats are represented with llvM::ConstantDataVector, but
constant vectors of bools use llvm::ConstantVector (which is what LLVM
3.0 uses for all constant vectors).  Now lGetMask() always does the
llvm::ConstantVector path, to cover this case.

This improves generated C++ code by eliminating things like select
with an all on/off mask, turning movmask calls with constants into
constant values, etc.

2012-04-18 11:39:11 -07:00

155 KiB

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