From: Bob Wilson <bob.wilson@apple.com>
Date: Fri, 25 May 2018 21:26:03 +0000 (+0000)
Subject: Support Swift calling convention for PPC64 targets
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7d02f59fe6b82c18cf956bf03f03b363c678b7a1;p=clang

Support Swift calling convention for PPC64 targets

This adds basic support for the Swift calling convention with PPC64 targets.
Patch provided by Atul Sowani in bug report #37223

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@333316 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Basic/Targets/PPC.h b/lib/Basic/Targets/PPC.h
index 629e4cfefb..9ea100f0a1 100644
--- a/lib/Basic/Targets/PPC.h
+++ b/lib/Basic/Targets/PPC.h
@@ -335,6 +335,15 @@ public:
     }
     return false;
   }
+
+  CallingConvCheckResult checkCallingConvention(CallingConv CC) const override {
+    switch (CC) {
+    case CC_Swift:
+      return CCCR_OK;
+    default:
+      return CCCR_Warning;
+    }
+  }
 };
 
 class LLVM_LIBRARY_VISIBILITY DarwinPPC32TargetInfo
diff --git a/lib/CodeGen/TargetInfo.cpp b/lib/CodeGen/TargetInfo.cpp
index 4e25c72cfb..3ec0055360 100644
--- a/lib/CodeGen/TargetInfo.cpp
+++ b/lib/CodeGen/TargetInfo.cpp
@@ -4287,7 +4287,7 @@ PPC32TargetCodeGenInfo::initDwarfEHRegSizeTable(CodeGen::CodeGenFunction &CGF,
 
 namespace {
 /// PPC64_SVR4_ABIInfo - The 64-bit PowerPC ELF (SVR4) ABI information.
-class PPC64_SVR4_ABIInfo : public ABIInfo {
+class PPC64_SVR4_ABIInfo : public SwiftABIInfo {
 public:
   enum ABIKind {
     ELFv1 = 0,
@@ -4331,7 +4331,7 @@ private:
 public:
   PPC64_SVR4_ABIInfo(CodeGen::CodeGenTypes &CGT, ABIKind Kind, bool HasQPX,
                      bool SoftFloatABI)
-      : ABIInfo(CGT), Kind(Kind), HasQPX(HasQPX),
+      : SwiftABIInfo(CGT), Kind(Kind), HasQPX(HasQPX),
         IsSoftFloatABI(SoftFloatABI) {}
 
   bool isPromotableTypeForABI(QualType Ty) const;
@@ -4374,6 +4374,15 @@ public:
 
   Address EmitVAArg(CodeGenFunction &CGF, Address VAListAddr,
                     QualType Ty) const override;
+
+  bool shouldPassIndirectlyForSwift(ArrayRef<llvm::Type*> scalars,
+                                    bool asReturnValue) const override {
+    return occupiesMoreThan(CGT, scalars, /*total*/ 4);
+  }
+
+  bool isSwiftErrorInRegister() const override {
+    return false;
+  }
 };
 
 class PPC64_SVR4_TargetCodeGenInfo : public TargetCodeGenInfo {