JIT: Support frozen structs for Swift pinvokes (#99294)

Add support for decomposing structs in Swift pinvokes. Reverse pinvokes are not yet handled, and multireg returns also aren't yet handled.

Also add 100 auto generated Swift ABI stress tests.

Author: jakobbotsch

src/coreclr/inc/corinfo.h

@@ -3080,6 +3080,9 @@ class ICorStaticInfo
             SYSTEMV_AMD64_CORINFO_STRUCT_REG_PASSING_DESCRIPTOR*    structPassInRegDescPtr  /* OUT */
             ) = 0;
 
+    // Classifies a swift structure into primitives or an implicit byref for ABI purposes.
+    virtual void getSwiftLowering(CORINFO_CLASS_HANDLE structHnd, CORINFO_SWIFT_LOWERING* pLowering) = 0;
+
     virtual uint32_t getLoongArch64PassStructInRegisterFlags(CORINFO_CLASS_HANDLE cls) = 0;
     virtual uint32_t getRISCV64PassStructInRegisterFlags(CORINFO_CLASS_HANDLE cls) = 0;
 };

src/coreclr/inc/icorjitinfoimpl_generated.h

@@ -504,6 +504,10 @@ bool getSystemVAmd64PassStructInRegisterDescriptor(
           CORINFO_CLASS_HANDLE structHnd,
           SYSTEMV_AMD64_CORINFO_STRUCT_REG_PASSING_DESCRIPTOR* structPassInRegDescPtr) override;
 
+void getSwiftLowering(
+          CORINFO_CLASS_HANDLE structHnd,
+          CORINFO_SWIFT_LOWERING* pLowering) override;
+
 uint32_t getLoongArch64PassStructInRegisterFlags(
           CORINFO_CLASS_HANDLE structHnd) override;
 

src/coreclr/inc/jiteeversionguid.h

@@ -43,11 +43,11 @@ typedef const GUID *LPCGUID;
 #define GUID_DEFINED
 #endif // !GUID_DEFINED
 
-constexpr GUID JITEEVersionIdentifier = { /* 86eab154-5d93-4fad-bc07-e94fd9268b70 */
-    0x86eab154,
-    0x5d93,
-    0x4fad,
-    {0xbc, 0x07, 0xe9, 0x4f, 0xd9, 0x26, 0x8b, 0x70}
+constexpr GUID JITEEVersionIdentifier = { /* e5f629d4-edc8-48f1-a75d-0fa1f0b5af6f */
+    0xe5f629d4,
+    0xedc8,
+    0x48f1,
+    {0xa7, 0x5d, 0x0f, 0xa1, 0xf0, 0xb5, 0xaf, 0x6f}
   };
 
 //////////////////////////////////////////////////////////////////////////////////////////////////////////

src/coreclr/jit/ICorJitInfo_names_generated.h

@@ -125,6 +125,7 @@ DEF_CLR_API(printMethodName)
 DEF_CLR_API(getMethodNameFromMetadata)
 DEF_CLR_API(getMethodHash)
 DEF_CLR_API(getSystemVAmd64PassStructInRegisterDescriptor)
+DEF_CLR_API(getSwiftLowering)
 DEF_CLR_API(getLoongArch64PassStructInRegisterFlags)
 DEF_CLR_API(getRISCV64PassStructInRegisterFlags)
 DEF_CLR_API(getThreadTLSIndex)

src/coreclr/jit/ICorJitInfo_wrapper_generated.hpp

@@ -1193,6 +1193,15 @@ bool WrapICorJitInfo::getSystemVAmd64PassStructInRegisterDescriptor(
     return temp;
 }
 
+void WrapICorJitInfo::getSwiftLowering(
+          CORINFO_CLASS_HANDLE structHnd,
+          CORINFO_SWIFT_LOWERING* pLowering)
+{
+    API_ENTER(getSwiftLowering);
+    wrapHnd->getSwiftLowering(structHnd, pLowering);
+    API_LEAVE(getSwiftLowering);
+}
+
 uint32_t WrapICorJitInfo::getLoongArch64PassStructInRegisterFlags(
           CORINFO_CLASS_HANDLE structHnd)
 {

src/coreclr/jit/compiler.h

@@ -4377,7 +4377,9 @@ class Compiler
     void impCheckForPInvokeCall(
         GenTreeCall* call, CORINFO_METHOD_HANDLE methHnd, CORINFO_SIG_INFO* sig, unsigned mflags, BasicBlock* block);
     GenTreeCall* impImportIndirectCall(CORINFO_SIG_INFO* sig, const DebugInfo& di = DebugInfo());
-    void impPopArgsForUnmanagedCall(GenTreeCall* call, CORINFO_SIG_INFO* sig, /* OUT */ CallArg** swiftErrorArg);
+    void impPopArgsForUnmanagedCall(GenTreeCall* call, CORINFO_SIG_INFO* sig, CallArg** swiftErrorArg);
+    void impPopArgsForSwiftCall(GenTreeCall* call, CORINFO_SIG_INFO* sig, CallArg** swiftErrorArg);
+    void impRetypeUnmanagedCallArgs(GenTreeCall* call);
 
 #ifdef SWIFT_SUPPORT
     void impAppendSwiftErrorStore(GenTreeCall* call, CallArg* const swiftErrorArg);

src/coreclr/jit/gentree.h

@@ -4726,7 +4726,6 @@ class CallArg
     CORINFO_CLASS_HANDLE GetSignatureClassHandle() { return m_signatureClsHnd; }
     var_types GetSignatureType() { return m_signatureType; }
     WellKnownArg GetWellKnownArg() { return m_wellKnownArg; }
-    void SetWellKnownArg(const WellKnownArg argType) { m_wellKnownArg = argType; }
     bool IsTemp() { return m_isTmp; }
     // clang-format on