https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92263
--- Comment #8 from Jim Wilson <wilson at gcc dot gnu.org> --- Author: wilson Date: Tue Nov 5 22:34:40 2019 New Revision: 277861 URL: https://gcc.gnu.org/viewcvs?rev=277861&root=gcc&view=rev Log: Allow libcalls for complex memcpy when optimizing for size. The RISC-V backend wants to use a libcall when optimizing for size if more than 6 instructions are needed. Emit_move_complex asks for no libcalls. This case requires 8 insns for rv64 and 16 insns for rv32, so we get fallback code that emits a loop. Commit_one_edge_insertion doesn't allow code inserted for a phi node on an edge to end with a branch, and so this triggers an assertion. This problem goes away if we allow libcalls when optimizing for size, which gives the code the RISC-V backend wants, and avoids triggering the assert. gcc/ PR middle-end/92263 * expr.c (emit_move_complex): Only use BLOCK_OP_NO_LIBCALL when optimize_insn_for_speed_p is true. gcc/testsuite/ PR middle-end/92263 * gcc.dg/pr92263.c: New. Added: trunk/gcc/testsuite/gcc.dg/pr92263.c Modified: trunk/gcc/ChangeLog trunk/gcc/expr.c trunk/gcc/testsuite/ChangeLog
