Support Swift calling convention for WebAssembly targets

kateinoigakukun · dschuff · commit c5bd3d07262f · 2020-01-24T10:30:46.000-08:00
This adds basic support for the Swift calling convention with WebAssembly targets. Reviewed By: dschuff Differential Revision: https://reviews.llvm.org/D71823
diff --git a/clang/lib/Basic/Targets/WebAssembly.h b/clang/lib/Basic/Targets/WebAssembly.h
@@ -114,6 +114,16 @@ class LLVM_LIBRARY_VISIBILITY WebAssemblyTargetInfo : public TargetInfo {
                ? (IsSigned ? SignedLongLong : UnsignedLongLong)
                : TargetInfo::getLeastIntTypeByWidth(BitWidth, IsSigned);
   }
+
+  CallingConvCheckResult checkCallingConvention(CallingConv CC) const override {
+    switch (CC) {
+    case CC_C:
+    case CC_Swift:
+      return CCCR_OK;
+    default:
+      return CCCR_Warning;
+    }
+  }
 };
 class LLVM_LIBRARY_VISIBILITY WebAssembly32TargetInfo
     : public WebAssemblyTargetInfo {
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
@@ -672,7 +672,8 @@ static bool callingConvSupported(CallingConv::ID CallConv) {
          CallConv == CallingConv::PreserveMost ||
          CallConv == CallingConv::PreserveAll ||
          CallConv == CallingConv::CXX_FAST_TLS ||
-         CallConv == CallingConv::WASM_EmscriptenInvoke;
+         CallConv == CallingConv::WASM_EmscriptenInvoke ||
+         CallConv == CallingConv::Swift;
 }
 
 SDValue

Original file line number	Diff line number	Diff line change
`@@ -672,7 +672,8 @@ static bool callingConvSupported(CallingConv::ID CallConv) {`
`672`	`672`	`CallConv == CallingConv::PreserveMost \|\|`
`673`	`673`	`CallConv == CallingConv::PreserveAll \|\|`
`674`	`674`	`CallConv == CallingConv::CXX_FAST_TLS \|\|`
`675`		`- CallConv == CallingConv::WASM_EmscriptenInvoke;`
	`675`	`+ CallConv == CallingConv::WASM_EmscriptenInvoke \|\|`
	`676`	`+ CallConv == CallingConv::Swift;`
`676`	`677`	`}`
`677`	`678`
`678`	`679`	`SDValue`