https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83419
--- Comment #7 from Alexandre Oliva <aoliva at gcc dot gnu.org> --- Author: aoliva Date: Thu Dec 21 18:14:06 2017 New Revision: 255947 URL: https://gcc.gnu.org/viewcvs?rev=255947&root=gcc&view=rev Log: [SFN] propagate single-nondebug-stmt's side effects to enclosing list Statements without side effects, preceded by debug begin stmt markers, would become a statement list with side effects, although the stmt on its own would be extracted from the list and remain not having side effects. This causes debug info and possibly codegen differences. This patch fixes it, identifying the situation in which the stmt would have been extracted from the stmt list, and propagating the side effects flag from the stmt to the list. for gcc/ChangeLog PR debug/83419 * c-family/c-semantics.c (pop_stmt_list): Propagate side effects from single nondebug stmt to container list. for gcc/testsuite/ChangeLog PR debug/83419 * gcc.dg/pr83419.c: New. Added: trunk/gcc/testsuite/gcc.dg/pr83419.c Modified: trunk/gcc/ChangeLog trunk/gcc/c-family/c-semantics.c trunk/gcc/testsuite/ChangeLog
