7123954: Some CTW test crash with SIGSEGV
Summary: Correct Allocate expansion code to preserve i_o when only slow call is generated.
Reviewed-by: iveresov
^build/
^dist/
/nbproject/private/
^src/share/tools/hsdis/build/
^src/share/tools/IdealGraphVisualizer/[a-zA-Z0-9]*/build/
^src/share/tools/IdealGraphVisualizer/build/
^src/share/tools/IdealGraphVisualizer/dist/
^.hgtip
.DS_Store