Before LL, instrument outstanding helper calls.
Callgrind, Cachegrind, and Lackey call
helpers for memory accesses in bunches, to reduce
register save/restore overhead (and merge load/store
within same instruction into a "modify" event).
The calls should not be done within a RMW section
enclosed by LL/SC instructions, as this reduces the
chance of SC to succeed, and can result in hangs.
For Callgrind, this definitly helped MIPS, and was
committed in r13136. Do the same for Cachegrind/Lackey.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13143 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/cachegrind/cg_main.c b/cachegrind/cg_main.c
index 6937d02..2ce661e 100644
--- a/cachegrind/cg_main.c
+++ b/cachegrind/cg_main.c
@@ -1154,6 +1154,8 @@
dataTy = typeOfIRTemp(tyenv, st->Ist.LLSC.result);
addEvent_Dr( &cgs, curr_inode,
sizeofIRType(dataTy), st->Ist.LLSC.addr );
+ /* flush events before LL, should help SC to succeed */
+ flushEvents( &cgs );
} else {
/* SC */
dataTy = typeOfIRExpr(tyenv, st->Ist.LLSC.storedata);