RFR(XS) 8032894: Remove dead code in Pressure::lower (original) (raw)

Niclas Adlertz niclas.adlertz at oracle.com
Wed Jan 29 04:09:38 PST 2014

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Hi all,

When building the physical IFG, we step backwards in each block, and remove things that are defined from the LIVE_OUT, (and lower the current pressure) and add input to the LIVE_OUT (and raising the current pressure). Each time we lower or raise the current pressure, we check if it's bigger than the current maximum pressure, known as final_pressure. However the final_pressure can never increase when removing definitions (i.e. lower the current pressure) so the check for a new final_pressure in Pressure::lower is useless.

webrev: http://cr.openjdk.java.net/~adlertz/JDK-8032894/webrev00/ bug: https://bugs.openjdk.java.net/browse/JDK-8032894

Kind Regards, Niclas Adlertz

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