AMDGPU: Change fdiv lowering based on !fpmath metadata

If 2.5 ulp is acceptable, denormals are not required, and
isn't a reciprocal which will already be handled, replace
with a faster fdiv.

Simplify the lowering tests by using per function
subtarget features.

llvm-svn: 276051

1 files changed, 12 insertions, 2 deletions

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUIntrinsicInfo.h b/llvm/lib/Target/AMDGPU/AMDGPUIntrinsicInfo.h
index f4173929259..6cb8b964464 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUIntrinsicInfo.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPUIntrinsicInfo.h
@@ -34,13 +34,23 @@ enum ID {
 class AMDGPUIntrinsicInfo final : public TargetIntrinsicInfo {
 public:
   AMDGPUIntrinsicInfo();
+
+  StringRef getName(unsigned IntrId, ArrayRef<Type *> Tys = None) const;
+
   std::string getName(unsigned IntrId, Type **Tys = nullptr,
-                      unsigned numTys = 0) const override;
+                      unsigned NumTys = 0) const override;
+
   unsigned lookupName(const char *Name, unsigned Len) const override;
   bool isOverloaded(unsigned IID) const override;
   Function *getDeclaration(Module *M, unsigned ID,
                            Type **Tys = nullptr,
-                           unsigned numTys = 0) const override;
+                           unsigned NumTys = 0) const override;
+
+  Function *getDeclaration(Module *M, unsigned ID,
+                           ArrayRef<Type *> = None) const;
+
+  FunctionType *getType(LLVMContext &Context, unsigned ID,
+                        ArrayRef<Type*> Tys = None) const;
 };
 
 } // end namespace llvm