a5bb8a5cea
2016-11-23 Richard Biener <rguenther@suse.de> Prathamesh Kulkarni <prathamesh.kulkarni@linaro.rog> PR tree-optimization/78154 * tree-vrp.c (gimple_stmt_nonzero_warnv_p): Return true if function returns it's argument and the argument is nonnull. * builtin-attrs.def: Define ATTR_RETURNS_NONNULL, ATT_RETNONNULL_NOTHROW_LEAF. * builtins.def (BUILT_IN_MEMPCPY): Change attribute to ATTR_RETNONNULL_NOTHROW_LEAF. (BUILT_IN_STPCPY): Likewise. (BUILT_IN_STPNCPY): Likewise. (BUILT_IN_MEMPCPY_CHK): Likewise. (BUILT_IN_STPCPY_CHK): Likewise. (BUILT_IN_STPNCPY_CHK): Likewise. (BUILT_IN_STRCAT): Change attribute to ATTR_RET1_NOTHROW_NONNULL_LEAF. (BUILT_IN_STRNCAT): Likewise. (BUILT_IN_STRNCPY): Likewise. (BUILT_IN_MEMSET_CHK): Likewise. (BUILT_IN_STRCAT_CHK): Likewise. (BUILT_IN_STRCPY_CHK): Likewise. (BUILT_IN_STRNCAT_CHK): Likewise. (BUILT_IN_STRNCPY_CHK): Likewise. testsuite/ * gcc.dg/tree-ssa/pr78154.c: New test. Co-Authored-By: Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org> From-SVN: r242745
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