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* builtins.c (expand_builtin_strcmp): Defend against the possibility that gen_cmpstrsi may fail: Stabilize the argument list against re-evaluation and expand the library call directly using this saved argument list if a cmpstrsi sequence can't be generated. (expand_builtin_strncmp): Likewise. * config/i386/i386.md (cmpstrsi, movstrsi): Disable with -Os. * gcc.c-torture/execute/string-opt-8.c: Don't test optimizations that inline strncmp as cmpstrsi on i386 when compiled with -Os. From-SVN: r72380
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