Hi,
This patch disables attempts to expand instrumentation thunks which appear when
we create specialized function versions. Problem was found during SPEC2006
insatrumentation with '-Ofast -flto'. Unfortunately I couldn't make a small
reproducer. Bootstrapped and tested on x86_64-unknown-linux-gnu. OK for trunk?
Thanks,
Ilya
--
2015-03-18 Ilya Enkovich <ilya.enkov...@intel.com>
* cgraphunit.c (cgraph_node::expand_thunk): Don't expand
instrumentation thunks.
diff --git a/gcc/cgraphunit.c b/gcc/cgraphunit.c
index e640907..abc9cfe 100644
--- a/gcc/cgraphunit.c
+++ b/gcc/cgraphunit.c
@@ -1508,6 +1508,10 @@ cgraph_node::expand_thunk (bool output_asm_thunks, bool
force_gimple_thunk)
tree thunk_fndecl = decl;
tree a;
+ /* Instrumentation thunk is the same function with
+ a different signature. Never need to expand it. */
+ if (thunk.add_pointer_bounds_args)
+ return false;
if (!force_gimple_thunk && this_adjusting
&& targetm.asm_out.can_output_mi_thunk (thunk_fndecl, fixed_offset,
