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Hello! I have committed following patch that also implements ix86_target_string handling of the new option. 2016-05-25 Uros Bizjak <ubizjak@gmail.com> H.J. Lu <hongjiu.lu@intel.com> PR target/70738 * common/config/i386/i386-common.c (OPTION_MASK_ISA_GENERAL_REGS_ONLY_UNSET): New. (ix86_handle_option) <case OPT_mgeneral_regs_only>: Disable MPX, MMX, SSE and x87 instructions for -mgeneral-regs-only. * config/i386/i386.opt (ix86_target_flags): Add new Variable. (-mgeneral-regs-only): Add new option. * config/i386/i386.c (ix86_option_override_internal): Don't enable x87 instructions if only general registers are allowed. (ix86_target_string): Add ix86_flags argument. Handle additional flags options through ix86_flags argument. Update all callers. * doc/invoke.texi: Document -mgeneral-regs-only. testsuite/ChangeLog: 2016-05-25 H.J. Lu <hongjiu.lu@intel.com> PR target/70738 * gcc.target/i386/pr70738-1.c: New test. * gcc.target/i386/pr70738-2.c: Likewise. * gcc.target/i386/pr70738-3.c: Likewise. * gcc.target/i386/pr70738-4.c: Likewise. * gcc.target/i386/pr70738-5.c: Likewise. * gcc.target/i386/pr70738-6.c: Likewise. * gcc.target/i386/pr70738-7.c: Likewise. * gcc.target/i386/pr70738-8.c: Likewise. * gcc.target/i386/pr70738-9.c: Likewise. Added is also a removal of a couple of unneeded variables: 2016-05-25 Uros Bizjak <ubizjak@gmail.com> * config/i386/i386.opt (ix86_target_flags_explicit): Remove. (x_ix86_target_flags_explicit): Remove. * config/i386/i386.c (ix86_function_specific_save): Do not copy x_ix86_target_flags_explicit. (ix86_function_specific_restore): Ditto. Patch was bootstrapped and regression tested on x86_64-linux-gnu {,-m32}. Committed to mainline SVN. Uros.
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