6837011: SIGSEGV in PhaseIdealLoop in 32bit jvm
Summary: The CR's test crashes with SIGSEGV when running with "-server -Xcomp" using using 32bit jvm.
Reviewed-by: kvn, never, rasbold
6833879: Assigning positive zero is ignored when old value is negative zero
Summary: Don't perform CMOVE identity optimization for floating point types
Reviewed-by: kvn, never