Annotate imprecise FP division with fpaccuracy metadata
The OpenCL single precision division operation is only required to
be accurate to 2.5ulp. Annotate the fdiv instruction with metadata
which signals to the backend that an imprecise divide instruction
may be used.
llvm-svn: 143136
diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index 858962d..4940e21 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -2382,6 +2382,11 @@
/// a r-value suitable for passing the given parameter.
void EmitDelegateCallArg(CallArgList &args, const VarDecl *param);
+ /// SetFPAccuracy - Set the minimum required accuracy of the given floating
+ /// point operation, expressed as the maximum relative error in ulp.
+ void SetFPAccuracy(llvm::Value *Val, unsigned AccuracyN,
+ unsigned AccuracyD = 1);
+
private:
void EmitReturnOfRValue(RValue RV, QualType Ty);