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| author | H.J. Lu <hjl.tools@gmail.com> | 2021-06-19 08:16:45 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2021-12-03 05:12:30 -0800 |
| commit | f7854b908977adce4ff669c4e0332ef868568b7c (patch) | |
| tree | d2f77c87c4dd0166bbb3f636f2d7d717a26eed12 /gcc/varasm.c | |
| parent | 97ffef3553267f52ca83dbebdcc8b5e3739febee (diff) | |
| download | gcc-f7854b908977adce4ff669c4e0332ef868568b7c.zip gcc-f7854b908977adce4ff669c4e0332ef868568b7c.tar.gz gcc-f7854b908977adce4ff669c4e0332ef868568b7c.tar.bz2 | |
Add TARGET_IFUNC_REF_LOCAL_OK
1. On some targets, like PowerPC, reference to ifunc function resolver
must be non-local so that compiler will properly emit PLT call. Add
TARGET_IFUNC_REF_LOCAL_OK to allow binding indirect function resolver
locally for targets which don't require special PLT call sequence.
2. Add ix86_call_use_plt_p to call local ifunc function resolvers via
PLT.
gcc/
PR target/51469
PR target/83782
* target.def (ifunc_ref_local_ok): Add a target hook.
* varasm.c (default_binds_local_p_3): Force indirect function
resolver non-local only if targetm.ifunc_ref_local_ok returns
false.
* config/i386/i386-expand.c (ix86_expand_call): Call
ix86_call_use_plt_p to check if PLT should be used.
* config/i386/i386-protos.h (ix86_call_use_plt_p): New.
* config/i386/i386.c (output_pic_addr_const): Call
ix86_call_use_plt_p to check if "@PLT" is needed.
(ix86_call_use_plt_p): New.
(TARGET_IFUNC_REF_LOCAL_OK): New.
* doc/tm.texi.in: Add TARGET_IFUNC_REF_LOCAL_OK.
* doc/tm.texi: Regenerated.
gcc/testsuite/
PR target/51469
PR target/83782
* gcc.target/i386/pr83782-1.c: New test.
* gcc.target/i386/pr83782-2.c: Likewise.
Diffstat (limited to 'gcc/varasm.c')
| -rw-r--r-- | gcc/varasm.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/varasm.c b/gcc/varasm.c index aff93ca..5da3b8f 100644 --- a/gcc/varasm.c +++ b/gcc/varasm.c @@ -7474,7 +7474,8 @@ default_binds_local_p_3 (const_tree exp, bool shlib, bool weak_dominate, FIXME: We can resolve the weakref case more curefuly by looking at the weakref alias. */ if (lookup_attribute ("weakref", DECL_ATTRIBUTES (exp)) - || (TREE_CODE (exp) == FUNCTION_DECL + || (!targetm.ifunc_ref_local_ok () + && TREE_CODE (exp) == FUNCTION_DECL && cgraph_node::get (exp) && cgraph_node::get (exp)->ifunc_resolver)) return false; |