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2012-05-25 H.J. Lu <hongjiu.lu@intel.com>
PR target/53383
* doc/invoke.texi: Add a warning for -mpreferred-stack-boundary=3.
* config/i386/i386.c (ix86_option_override_internal): Allow
-mpreferred-stack-boundary=3 for 64-bit if SSE is disenabled.
* config/i386/i386.h (MIN_STACK_BOUNDARY): Set to 64 for 64-bit
if SSE is disenabled.
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