================
@@ -3535,6 +3536,74 @@ void CXXNameMangler::mangleExtFunctionInfo(const
FunctionType *T) {
// FIXME: noreturn
}
+enum SMEState {
+ Normal = 0,
+ SM_Enabled = 1 << 0,
+ SM_Compatible = 1 << 1,
+ ZA_Agnostic = 1 << 2,
+ ZA_Shift = 3,
+ ZT0_Shift = 6,
+ None = 0b000,
+ In = 0b001,
+ Out = 0b010,
+ InOut = 0b011,
+ Preserves = 0b100
+};
+
+unsigned encodeZAState(unsigned SMEAttrs) {
+ switch (SMEAttrs) {
+ case FunctionType::ARM_None:
+ return SMEState::None;
+ case FunctionType::ARM_In:
+ return SMEState::In;
+ case FunctionType::ARM_Out:
+ return SMEState::Out;
+ case FunctionType::ARM_InOut:
+ return SMEState::InOut;
+ case FunctionType::ARM_Preserves:
+ return SMEState::Preserves;
+ }
+ llvm_unreachable("Unrecognised SME attribute");
+}
+
+// As described in the AArch64 ACLE, the mangling scheme for function types
+// which have SME attributes is implemented as a "pseudo" template:
+//
+// '__SME_ATTRS<<normal_function_type>, <sme_state>>'
+//
+// Combining the function type with a bitmask representing the streaming and ZA
+// properties of the function's interface.
+//
+// The mangling scheme is otherwise defined in the appendices to the Procedure
+// Call Standard for the Arm Architecture, see
+//
https://github.com/ARM-software/abi-aa/blob/main/aapcs64/aapcs64.rst#appendix-c-mangling
----------------
sdesmalen-arm wrote:
Sorry, I got confused and thought this was added to the AAPCS. Could you add
the link to the ACLE section instead?
https://github.com/llvm/llvm-project/pull/114209
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