[PATCH] [PPC64]: Add support for Swift calling convention

[Adrian Prantl via cfe-commits]

Is it possible to add a testcase for this?

-- adrian


> On Mar 22, 2017, at 5:00 AM, Andrew Jeffery via cfe-commits <cfe-commits at lists.llvm.org> wrote:
> 
> Signed-off-by: Andrew Jeffery <andrew at aj.id.au>
> ---
> lib/Basic/Targets.cpp      | 11 +++++++++++
> lib/CodeGen/TargetInfo.cpp | 14 ++++++++++++--
> 2 files changed, 23 insertions(+), 2 deletions(-)
> 
> diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
> index fdedd91a3e15..6d7f37f2479a 100644
> --- a/lib/Basic/Targets.cpp
> +++ b/lib/Basic/Targets.cpp
> @@ -1708,6 +1708,17 @@ public:
>     }
>     return false;
>   }
> +
> +  CallingConvCheckResult checkCallingConvention(CallingConv CC) const override {
> +    switch (CC) {
> +    case CC_C:
> +    case CC_Swift:
> +        return CCCR_OK;
> +    default:
> +        break;
> +    }
> +    return CCCR_Warning;
> +  }
> };
> 
> class DarwinPPC32TargetInfo : public DarwinTargetInfo<PPC32TargetInfo> {
> diff --git a/lib/CodeGen/TargetInfo.cpp b/lib/CodeGen/TargetInfo.cpp
> index d2fc3888ef29..6193f6c4ac29 100644
> --- a/lib/CodeGen/TargetInfo.cpp
> +++ b/lib/CodeGen/TargetInfo.cpp
> @@ -4175,7 +4175,7 @@ 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,
> @@ -4219,7 +4219,7 @@ 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;
> @@ -4262,6 +4262,16 @@ public:
> 
>   Address EmitVAArg(CodeGenFunction &CGF, Address VAListAddr,
>                     QualType Ty) const override;
> +
> +  bool shouldPassIndirectlyForSwift(CharUnits totalSize,
> +                                    ArrayRef<llvm::Type*> scalars,
> +                                    bool asReturnValue) const override {
> +    return occupiesMoreThan(CGT, scalars, /*total*/ 4);
> +  }
> +
> +  bool isSwiftErrorInRegister() const override {
> +    return true;
> +  }
> };
> 
> class PPC64_SVR4_TargetCodeGenInfo : public TargetCodeGenInfo {
> -- 
> 2.9.3
> 
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