[ARM][Clang] Removing lowering of half-precision FP arguments and returns from Clang's CodeGen

Summary:
On the process of moving the argument lowering handling for
half-precision floating point 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.

Reviewers: rjmccall, chill, ostannard, dnsampaio

Reviewed By: ostannard

Subscribers: stuij, kristof.beyls, dmgreen, danielkiss, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D81451

1 files changed, 0 insertions, 22 deletions

diff --git a/clang/lib/CodeGen/TargetInfo.cpp b/clang/lib/CodeGen/TargetInfo.cpp
index 564eb09..44be42aa 100644
--- a/clang/lib/CodeGen/TargetInfo.cpp
+++ b/clang/lib/CodeGen/TargetInfo.cpp
@@ -6265,17 +6265,6 @@ ABIArgInfo ARMABIInfo::classifyArgumentType(QualType Ty, bool isVariadic,
   if (isIllegalVectorType(Ty))
     return coerceIllegalVector(Ty);
 
-  // _Float16 and __fp16 get passed as if it were an int or float, but
-  // with the top 16 bits unspecified. This is not done for OpenCL as it handles
-  // the half type natively, and does not need to interwork with AAPCS code.
-  if ((Ty->isFloat16Type() || Ty->isHalfType()) &&
-      !getContext().getLangOpts().NativeHalfArgsAndReturns) {
-    llvm::Type *ResType = IsAAPCS_VFP ?
-      llvm::Type::getFloatTy(getVMContext()) :
-      llvm::Type::getInt32Ty(getVMContext());
-    return ABIArgInfo::getDirect(ResType);
-  }
-
   // __bf16 gets passed using the bfloat IR type, or using i32 but
   // with the top 16 bits unspecified.
   if (Ty->isBFloat16Type() && IsFloatABISoftFP) {
@@ -6486,17 +6475,6 @@ ABIArgInfo ARMABIInfo::classifyReturnType(QualType RetTy, bool isVariadic,
       return coerceIllegalVector(RetTy);
   }
 
-  // _Float16 and __fp16 get returned as if it were an int or float, but with
-  // the top 16 bits unspecified. This is not done for OpenCL as it handles the
-  // half type natively, and does not need to interwork with AAPCS code.
-  if ((RetTy->isFloat16Type() || RetTy->isHalfType()) &&
-      !getContext().getLangOpts().NativeHalfArgsAndReturns) {
-    llvm::Type *ResType = IsAAPCS_VFP ?
-      llvm::Type::getFloatTy(getVMContext()) :
-      llvm::Type::getInt32Ty(getVMContext());
-    return ABIArgInfo::getDirect(ResType);
-  }
-
   // 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()) {