[ARM][bfloat] Do not coerce bfloat arguments and returns to integers

Summary:
As part of moving the argument lowering handling for bfloat arguments and
returns to the backend, this patch removes the code that was responsible for
handling the coercion of those arguments in Clang's Codegen.

Subscribers: kristof.beyls, danielkiss, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D81837

1 files changed, 0 insertions, 16 deletions

diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
index 44be42aa..9710e67 100644
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/lib/CodeGen/TargetInfo.cpp
@@ -6265,13 +6265,6 @@ ABIArgInfo ARMABIInfo::classifyArgumentType(QualType Ty, bool isVariadic,
   if (isIllegalVectorType(Ty))
     return coerceIllegalVector(Ty);
 
-  // __bf16 gets passed using the bfloat IR type, or using i32 but
-  // with the top 16 bits unspecified.
-  if (Ty->isBFloat16Type() && IsFloatABISoftFP) {
-    llvm::Type *ResType = llvm::Type::getInt32Ty(getVMContext());
-    return ABIArgInfo::getDirect(ResType);
-  }
-
   if (!isAggregateTypeForABI(Ty)) {
     // Treat an enum type as its underlying type.
     if (const EnumType *EnumTy = Ty->getAs<EnumType>()) {
@@ -6475,15 +6468,6 @@ ABIArgInfo ARMABIInfo::classifyReturnType(QualType RetTy, bool isVariadic,
       return coerceIllegalVector(RetTy);
   }
 
-  // if we're using the softfp float abi, __bf16 get returned as if it were an
-  // int but with the top 16 bits unspecified.
-  if (RetTy->isBFloat16Type()) {
-    llvm::Type *ResType = IsAAPCS_VFP ?
-      llvm::Type::getBFloatTy(getVMContext()) :
-      llvm::Type::getInt32Ty(getVMContext());
-    return ABIArgInfo::getDirect(ResType);
-  }
-
   if (!isAggregateTypeForABI(RetTy)) {
     // Treat an enum type as its underlying type.
     if (const EnumType *EnumTy = RetTy->getAs<EnumType>())