[driver] Disable the slp vectorizer at -O0, -O1, and -Oz. This mirrors the

Description

[driver] Disable the slp vectorizer at -O0, -O1, and -Oz. This mirrors the
behavior of the loop vectorizer, which is enabled at -O2, -O3, -O4, -Ofast
and -Os.
PR19568

Details

Committed
mcrosierApr 28 2014, 12:30 PM
Parents
rL207432: [X86] Add more details in the comments of X86TargetLowering…
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