Committed to ARM/embedded-4_6-branch.
2011-09-28 Jiangning Liu <jiangning....@arm.com>
PR rtl-optimization/38644
* config/i386/i386.c (ix86_stack_using_red_zone): Change inline
to be extern.
(TARGET_STACK_USING_RED_ZONE): New.
* config/rs6000/rs6000.c (rs6000_stack_using_red_zone): New.
(TARGET_STACK_USING_RED_ZONE): New.
(offset_below_red_zone_p): Change to use new hook
TARGET_STACK_USING_RED_ZONE.
* doc/tm.texi (TARGET_STACK_USING_RED_ZONE): New.
* doc/tm.texi.in (TARGET_STACK_USING_RED_ZONE): New.
* sched-deps.c (sched_analyze_1): If the stack pointer is being
modified and stack red zone is not supported for ports, flush out
all memory references as they may become invalid if moved across
the stack adjustment.
* target.def (stack_using_red_zone): New.
* testsuite/gcc.target/arm/stack-red-zone.c: New.
