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Add phase FlowSensitiveReductionPhase. It is possible to remove GuardingPiNodes, CheckCastNodes, and FixedGuards during HighTier under certain conditions (control-flow sensitive conditions). The phase added in this commit (FlowSensitiveReductionPhase) does that, and in addition replaces usages with "downcasting" PiNodes when possible thus resulting in more precise object stamps (e.g., non-null). Finally, usages of floating, side-effects free, expressions are also simplified (as per control-flow sensitive conditions). The newly added phase runs only during HighTier and can be deactivated using Graal option FlowSensitiveReduction (it is active by default).
author Miguel Garcia <miguel.m.garcia@oracle.com>
date Fri, 25 Apr 2014 16:50:52 +0200
parents a294fd0c4b38
children
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os_family = linux

arch = ia64

os_arch = linux_ia64

lib_arch = ia64

compiler = gcc

gnu_dis_arch = ia64

sysdefs = -DLINUX -D_GNU_SOURCE -DIA64 -DCC_INTERP

mark_style = alignment