===================================================================
@@ -7239,6 +7239,13 @@
emit_insn (gen_shcompact_incoming_args ());
}
+ /* If we are profiling, make sure no instructions are scheduled before
+ the call to mcount. Similarly if some call instructions are swapped
+ before frame related insns, it'll confuse the unwinder because
+ currently SH has no unwind info for function epilogues. */
+ if (crtl->profile || flag_exceptions || flag_unwind_tables)
+ emit_insn (gen_blockage ());
+
if (flag_stack_usage_info)
current_function_static_stack_size = stack_usage;
}
Hi, Attached is Kaz's patch from the PR. Tested against rev 185555 with make -k check RUNTESTFLAGS="--target_board=sh-sim \{-m2/-ml,-m2/-mb,-m2a-single/-mb, -m4-single/-ml,-m4-single/-mb, -m4a-single/-ml,-m4a-single/-mb}" It fixes a few "sometimes failing" libstdc++ failures. No new failures otherwise. OK to apply? Maybe this one should be backported to 4.7.x, too? Cheers, Oleg ChangeLog: PR/target 52642 * config/sh/sh.c (sh_expand_prologue): Emit blockage at the end of prologue for unwinder and profiler.