[FastISel][X86] Add support for floating-point select.

Description

[FastISel][X86] Add support for floating-point select.

This extends the select lowering to support floating-point selects. The
lowering depends on SSE instructions and that the conditon comes from a
floating-point compare. Under this conditions it is possible to emit an
optimized instruction sequence that doesn't require any branches to
simulate the select.

Details

Committed
ributzkaJun 23 2014, 2:55 PM
Parents
rL211543: [FastISel][X86] Optimize selects when the condition comes from a compare.
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