8026940: assert(n->outcnt() != 0 || C->top() == n || n->is_Proj()) failed: No dead instructions after post-alloc Summary: Remove input to junk phi if they also become dead during post_allocate_copy_removal Reviewed-by: roland

os_family = bsd

arch = x86

arch_model = x86_64

os_arch = bsd_x86

os_arch_model = bsd_x86_64

lib_arch = amd64

compiler = gcc

sysdefs = -D_ALLBSD_SOURCE -D_GNU_SOURCE -DAMD64