[llvm] c5bd3d0 - Support Swift calling convention for WebAssembly targets

[Derek Schuff via llvm-commits]

Author: Yuta Saito
Date: 2020-01-24T10:30:46-08:00
New Revision: c5bd3d07262ffda5b21576b9e1e2d2dd2e51fb4b

URL: https://github.com/llvm/llvm-project/commit/c5bd3d07262ffda5b21576b9e1e2d2dd2e51fb4b
DIFF: https://github.com/llvm/llvm-project/commit/c5bd3d07262ffda5b21576b9e1e2d2dd2e51fb4b.diff

LOG: Support Swift calling convention for WebAssembly targets

This adds basic support for the Swift calling convention with WebAssembly
targets.

Reviewed By: dschuff

Differential Revision: https://reviews.llvm.org/D71823

Added: 
    

Modified: 
    clang/lib/Basic/Targets/WebAssembly.h
    llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp

Removed: 
    


################################################################################
diff  --git a/clang/lib/Basic/Targets/WebAssembly.h b/clang/lib/Basic/Targets/WebAssembly.h
index 9665156b143f..55d90db267e1 100644
--- 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
index e91a9ea03767..12fad047759f 100644
--- 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