[AArch64] Define the macro __ARM_FP16_ARGS

The ACLE (ARM C Language Extensions) 2.0 defines that the predefined macro __ARM_FP16_ARGS should be defined if __fp16 can be used as an argument and result. The support for __fp16 to be used as an argument and result is already implemented for AArch64 so this change is just adding the missing macro. Differential Revision: http://reviews.llvm.org/D12240 llvm-svn: 245833
llvm · Aug 24, 2015 · 71ad47f · 71ad47f
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commit 71ad47f
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diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
@@ -5176,6 +5176,7 @@ class AArch64TargetInfo : public TargetInfo {
     // PCS specifies this for SysV variants, which is all we support. Other ABIs
     // may choose __ARM_FP16_FORMAT_ALTERNATIVE.
     Builder.defineMacro("__ARM_FP16_FORMAT_IEEE");
+    Builder.defineMacro("__ARM_FP16_ARGS");
 
     if (Opts.FastMath || Opts.FiniteMathOnly)
       Builder.defineMacro("__ARM_FP_FAST");

diff --git a/clang/test/Preprocessor/aarch64-target-features.c b/clang/test/Preprocessor/aarch64-target-features.c
@@ -19,6 +19,7 @@
 // CHECK: __ARM_FEATURE_NUMERIC_MAXMIN 1
 // CHECK: __ARM_FEATURE_UNALIGNED 1
 // CHECK: __ARM_FP 0xe
+// CHECK: __ARM_FP16_ARGS 1
 // CHECK: __ARM_FP16_FORMAT_IEEE 1
 // CHECK-NOT: __ARM_FP_FAST 1
 // CHECK: __ARM_FP_FENV_ROUNDING 1