Fix abi test for new initRaw runtime function

Author: Azoy

include/swift/Runtime/Metadata.h

@@ -1059,7 +1059,7 @@ SWIFT_RUNTIME_EXPORT
 void swift_initRawStructMetadata(StructMetadata *self,
                                  StructLayoutFlags flags,
                                  const TypeLayout *likeType,
-                                 ssize_t count);
+                                 int32_t count);
 
 /// Initialize the value witness table for a struct using the provided like type
 /// as the basis for the layout.

stdlib/public/runtime/Metadata.cpp

@@ -3030,7 +3030,7 @@ SWIFT_RUNTIME_EXPORT
 void swift::swift_initRawStructMetadata(StructMetadata *structType,
                                         StructLayoutFlags layoutFlags,
                                         const TypeLayout *likeTypeLayout,
-                                        ssize_t count) {
+                                        int32_t count) {
   auto vwtable = getMutableVWTableForInit(structType, layoutFlags);
 
   // The existing vwt function entries are all fine to preserve, the only thing
@@ -3040,9 +3040,9 @@ void swift::swift_initRawStructMetadata(StructMetadata *structType,
   auto alignMask = likeTypeLayout->flags.getAlignmentMask();
   auto extraInhabitantCount = likeTypeLayout->extraInhabitantCount;
 
-  // If our count is not -1, we're dealing an array like layout.
-  if (count != -1) {
-    stride *= (size_t)count;
+  // If our count is greater than or equal 0, we're dealing an array like layout.
+  if (count >= 0) {
+    stride *= count;
     size = stride;
   }
 

test/abi/macOS/arm64/stdlib.swift

@@ -569,6 +569,7 @@ Added: __swift_willThrowTypedImpl
 Added: __swift_enableSwizzlingOfAllocationAndRefCountingFunctions_forInstrumentsOnly
 Added: _swift_clearSensitive
 Added: _swift_updatePureObjCClassMetadata
+Added: _swift_initRawStructMetadata2
 
 // Runtime bincompat functions for Concurrency runtime to detect legacy mode
 Added: _swift_bincompat_useLegacyNonCrashingExecutorChecks

test/abi/macOS/x86_64/stdlib.swift

@@ -569,6 +569,7 @@ Added: __swift_willThrowTypedImpl
 Added: __swift_enableSwizzlingOfAllocationAndRefCountingFunctions_forInstrumentsOnly
 Added: _swift_clearSensitive
 Added: _swift_updatePureObjCClassMetadata
+Added: _swift_initRawStructMetadata2
 
 // Runtime bincompat functions for Concurrency runtime to detect legacy mode
 Added: _swift_bincompat_useLegacyNonCrashingExecutorChecks