https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79765
Alexander Ivchenko <aivchenk at gmail dot com> changed:
What |Removed |Added
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CC| |aivchenk at gmail dot com
--- Comment #1 from Alexander Ivchenko <aivchenk at gmail dot com> ---
Multi-versioning pass tries to make versions out of mpx chunks, which have no
bodies and hence it fails. I think there is no reason to keep target_clones
attribute for chunks. The following patch helps:
diff --git a/gcc/ipa-chkp.c b/gcc/ipa-chkp.c
index c7fc3a0..5de11b3 100644
--- a/gcc/ipa-chkp.c
+++ b/gcc/ipa-chkp.c
@@ -718,6 +718,9 @@ chkp_produce_thunks (bool early)
0, CGRAPH_FREQ_BASE);
node->create_reference (node->instrumented_version,
IPA_REF_CHKP, NULL);
+ DECL_ATTRIBUTES (node->decl)
+ = remove_attribute ("target_clones",
+ DECL_ATTRIBUTES (node->decl));
/* Thunk shouldn't be a cdtor. */
DECL_STATIC_CONSTRUCTOR (node->decl) = 0;
DECL_STATIC_DESTRUCTOR (node->decl) = 0;
.. And at "O0" it works. However it fails later on at O1 and above.
gcc/gcc/testsuite/gcc.target/i386/mvc1.c:18:1: error: virtual definition of
statement not up-to-date
main ()
^~~~
_3 = foo.chkp.ifunc ();
gcc/gcc/testsuite/gcc.target/i386/mvc1.c:18:1: internal compiler error:
verify_ssa failed
r0x113ccab verify_ssa(bool, bool)
../../gcc/gcc/tree-ssa.c:1184
0xd65f4b execute_function_todo
../../gcc/gcc/passes.c:1973
0xd64fab do_per_function
../../gcc/gcc/passes.c:1650
0xd660d6 execute_todo
../../gcc/gcc/passes.c:2016
