This patch implements the TARGET_VERSION_COMPATIBLE macro for RISC-V.
It checks if the versioned callee is compatible with the versioned
caller.
Signed-off-by: Yangyu Chen <c...@cyyself.name>
gcc/ChangeLog:
* config/riscv/riscv.cc (riscv_version_compatible): New function.
(TARGET_VERSION_COMPATIBLE): Define to riscv_version_compatible.
---
gcc/config/riscv/riscv.cc | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
index 65b82795541..30e980dbc80 100644
--- a/gcc/config/riscv/riscv.cc
+++ b/gcc/config/riscv/riscv.cc
@@ -13213,6 +13213,27 @@ riscv_compare_version_priority (tree decl1, tree decl2)
return compare_fmv_features (mask1, mask2, prio1, prio2);
}
+
+bool
+riscv_version_compatible (tree caller, tree callee)
+{
+ struct cl_target_option caller_opts;
+ struct cl_target_option callee_opts;
+ bool caller_not_def = parse_features_for_version (caller, caller_opts);
+ bool callee_not_def = parse_features_for_version (callee, callee_opts);
+
+ /* Callee must be compatible with caller when callee is default. */
+ if (! callee_not_def)
+ return true;
+
+ /* Callee must not be compatible with caller when caller is default but
callee
+ is not. */
+ if (! caller_not_def)
+ return false;
+
+ return riscv_ext_is_subset (&caller_opts, &callee_opts);
+}
+
/* This function returns true if FN1 and FN2 are versions of the same function,
that is, the target_version attributes of the function decls are different.
This assumes that FN1 and FN2 have the same signature. */
@@ -14427,6 +14448,9 @@ bool need_shadow_stack_push_pop_p ()
#undef TARGET_COMPARE_VERSION_PRIORITY
#define TARGET_COMPARE_VERSION_PRIORITY riscv_compare_version_priority
+#undef TARGET_VERSION_COMPATIBLE
+#define TARGET_VERSION_COMPATIBLE riscv_version_compatible
+
#undef TARGET_OPTION_FUNCTION_VERSIONS
#define TARGET_OPTION_FUNCTION_VERSIONS riscv_common_function_versions
--
2.49.0
