This is the mail archive of the
gcc-cvs@gcc.gnu.org
mailing list for the GCC project.
r277861 - in /trunk/gcc: ChangeLog expr.c tests...
- From: wilson at gcc dot gnu dot org
- To: gcc-cvs at gcc dot gnu dot org
- Date: Tue, 05 Nov 2019 22:34:40 -0000
- Subject: r277861 - in /trunk/gcc: ChangeLog expr.c tests...
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